chore(release): v0.16.0

BREAKING CHANGE: The build output has changed slightly. This isn't a huge deal, and no steps are required for users unless you're doing something weird with the output files after a build.

Before:

```
.output/
  <target>/
    chunks/
      popup-<hash>.js
    popup.html
```

After:

```
.output/
  <target>/
    popup.html
    popup.js
```

This applies for all HTML files, not just the popup.

.github/workflows/validate.yml

@@ -30,10 +30,10 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: ./.github/actions/setup
-      - run: pnpm build:all
-        working-directory: demo
       - run: pnpm tsc --noEmit
         working-directory: demo
+      - run: pnpm build:all
+        working-directory: demo
       - run: pnpm wxt zip
         working-directory: demo
       - run: pnpm vitest run

CHANGELOG.md

@@ -1,5 +1,230 @@
 # Changelog
 
+## v0.16.0
+
+[compare changes](https://github.com/wxt-dev/wxt/compare/v0.15.4...v0.16.0)
+
+### 🚀 Enhancements
+
+- ⚠️  ESM background support ([#398](https://github.com/wxt-dev/wxt/pull/398))
+
+### 📖 Documentation
+
+- Document how to opt into ESM ([1e12ce2](https://github.com/wxt-dev/wxt/commit/1e12ce2))
+
+### 🏡 Chore
+
+- **deps-dev:** Bump lint-staged from 15.2.0 to 15.2.1 ([#395](https://github.com/wxt-dev/wxt/pull/395))
+- **deps-dev:** Bump p-map from 7.0.0 to 7.0.1 ([#396](https://github.com/wxt-dev/wxt/pull/396))
+- **deps-dev:** Bump @vitest/coverage-v8 from 1.0.1 to 1.2.2 ([#397](https://github.com/wxt-dev/wxt/pull/397))
+
+#### ⚠️ Breaking Changes
+
+- ⚠️  ESM background support ([#398](https://github.com/wxt-dev/wxt/pull/398))
+
+## v0.15.4
+
+[compare changes](https://github.com/wxt-dev/wxt/compare/v0.15.3...v0.15.4)
+
+### 🩹 Fixes
+
+- **submit:** Load `.env.submit` automatically when running `wxt submit` and `wxt submit init` ([#391](https://github.com/wxt-dev/wxt/pull/391))
+
+## v0.15.3
+
+[compare changes](https://github.com/wxt-dev/wxt/compare/v0.15.2...v0.15.3)
+
+### 🩹 Fixes
+
+- **dev:** Reload `<name>/index.html` entrypoints properly on save ([#390](https://github.com/wxt-dev/wxt/pull/390))
+
+## v0.15.2
+
+[compare changes](https://github.com/wxt-dev/wxt/compare/v0.15.1...v0.15.2)
+
+### 🚀 Enhancements
+
+- Add `submit` command ([#370](https://github.com/wxt-dev/wxt/pull/370))
+
+### 🩹 Fixes
+
+- **dev:** Resolve `script` and `link` aliases ([#387](https://github.com/wxt-dev/wxt/pull/387))
+
+### ❤️ Contributors
+
+- Nenad Novaković ([@dvlden](https://github.com/dvlden))
+
+## v0.15.1
+
+[compare changes](https://github.com/wxt-dev/wxt/compare/v0.15.0...v0.15.1)
+
+### 🚀 Enhancements
+
+- Allow passing custom preferences to chrome, enabling dev mode on `chrome://extensions` and allowing content script sourcemaps automatically ([#384](https://github.com/wxt-dev/wxt/pull/384))
+
+### 🩹 Fixes
+
+- **security:** Upgrade to vite@5.0.12 to resolve CVE-2024-23331 ([39b76d3](https://github.com/wxt-dev/wxt/commit/39b76d3))
+
+### 📖 Documentation
+
+- Fixed doc errors on the guide/extension-api page ([#383](https://github.com/wxt-dev/wxt/pull/383))
+
+### 🏡 Chore
+
+- Fix vite version conflicts in demo extension ([98d2792](https://github.com/wxt-dev/wxt/commit/98d2792))
+
+### ❤️ Contributors
+
+- 0x7a7a ([@0x7a7a](https://github.com/0x7a7a))
+
+## v0.15.0
+
+[compare changes](https://github.com/wxt-dev/wxt/compare/v0.14.7...v0.15.0)
+
+### 🚀 Enhancements
+
+- **zip:** ⚠️  Add `includeSources` and rename `ignoredSources` to `excludeSources` ([#378](https://github.com/wxt-dev/wxt/pull/378))
+
+### 🩹 Fixes
+
+- Generate missing sourcemap in `wxt:unimport` plugin ([#381](https://github.com/wxt-dev/wxt/pull/381))
+- ⚠️  Move browser constants to `import.meta.env` ([#380](https://github.com/wxt-dev/wxt/pull/380))
+- Enable inline sourcemaps by default during development ([#382](https://github.com/wxt-dev/wxt/pull/382))
+
+### 📖 Documentation
+
+- Fix typo ([f9718a1](https://github.com/wxt-dev/wxt/commit/f9718a1))
+
+### 🏡 Chore
+
+- Update contributor docs ([eb758bd](https://github.com/wxt-dev/wxt/commit/eb758bd))
+
+#### ⚠️ Breaking Changes
+
+Renamed `zip.ignoredSources` to `zip.excludeSources` in [#378](https://github.com/wxt-dev/wxt/pull/378)
+
+Renamed undocumented constants for detecting the build config at runtime in [#380](https://github.com/wxt-dev/wxt/pull/380). Now documented here: https://wxt.dev/guide/multiple-browsers.html#runtime
+
+- `__BROWSER__` &rarr; `import.meta.env.BROWSER`
+- `__COMMAND__` &rarr; `import.meta.env.COMMAND`
+- `__MANIFEST_VERSION__` &rarr; `import.meta.env.MANIFEST_VERSION`
+- `__IS_CHROME__` &rarr; `import.meta.env.CHROME`
+- `__IS_FIREFOX__` &rarr; `import.meta.env.FIREFOX`
+- `__IS_SAFARI__` &rarr; `import.meta.env.SAFARI`
+- `__IS_EDGE__` &rarr; `import.meta.env.EDGE`
+- `__IS_OPERA__` &rarr; `import.meta.env.OPERA`
+
+### ❤️ Contributors
+
+- Nenad Novaković ([@dvlden](https://github.com/dvlden))
+
+## v0.14.7
+
+[compare changes](https://github.com/wxt-dev/wxt/compare/v0.14.6...v0.14.7)
+
+### 🩹 Fixes
+
+- Improve error messages when importing and building entrypoints ([3b63a51](https://github.com/wxt-dev/wxt/commit/3b63a51))
+- **storage:** Throw better error message when importing outside a extension environment ([35865ad](https://github.com/wxt-dev/wxt/commit/35865ad))
+- Upgrade `web-ext-run` ([62ecb6f](https://github.com/wxt-dev/wxt/commit/62ecb6f))
+
+### 📖 Documentation
+
+- Add `matches` to content script examples ([dab8efa](https://github.com/wxt-dev/wxt/commit/dab8efa))
+- Fix incorrect sample code ([#372](https://github.com/wxt-dev/wxt/pull/372))
+- Document defined constants for the build target ([68874e6](https://github.com/wxt-dev/wxt/commit/68874e6))
+- Add missing `await` to `createShadowRootUi` examples ([fc45c37](https://github.com/wxt-dev/wxt/commit/fc45c37))
+
+### ❤️ Contributors
+
+- 東奈比 ([@dongnaebi](http://github.com/dongnaebi))
+
+## v0.14.6
+
+[compare changes](https://github.com/wxt-dev/wxt/compare/v0.14.5...v0.14.6)
+
+### 🚀 Enhancements
+
+- Restart dev mode when saving config ([#365](https://github.com/wxt-dev/wxt/pull/365))
+- Add basic validation for entrypoint options ([#368](https://github.com/wxt-dev/wxt/pull/368))
+
+### 🩹 Fixes
+
+- Add subdependency bin directory so `wxt build --analyze` works with PNPM ([#363](https://github.com/wxt-dev/wxt/pull/363))
+- Sort build output files naturally ([#364](https://github.com/wxt-dev/wxt/pull/364))
+
+### 🤖 CI
+
+- Check for type errors in demo before building ([4b005b4](https://github.com/wxt-dev/wxt/commit/4b005b4))
+
+## v0.14.5
+
+[compare changes](https://github.com/wxt-dev/wxt/compare/v0.14.4...v0.14.5)
+
+### 🚀 Enhancements
+
+- Add `dev.reloadCommand` config ([#362](https://github.com/wxt-dev/wxt/pull/362))
+
+### 🩹 Fixes
+
+- Disable reload dev command when 4 commands are already registered ([#361](https://github.com/wxt-dev/wxt/pull/361))
+
+## v0.14.4
+
+[compare changes](https://github.com/wxt-dev/wxt/compare/v0.14.3...v0.14.4)
+
+### 🩹 Fixes
+
+- Allow requiring built-in node modules from ESM CLI ([#356](https://github.com/wxt-dev/wxt/pull/356))
+
+### 🏡 Chore
+
+- Add unit tests for passing flags via the CLI ([#354](https://github.com/wxt-dev/wxt/pull/354))
+
+## v0.14.3
+
+[compare changes](https://github.com/wxt-dev/wxt/compare/v0.14.2...v0.14.3)
+
+### 🩹 Fixes
+
+- Make `getArrayFromFlags` result can be undefined ([#352](https://github.com/wxt-dev/wxt/pull/352))
+
+### ❤️ Contributors
+
+- Yuns ([@yunsii](http://github.com/yunsii))
+
+## v0.14.2
+
+[compare changes](https://github.com/wxt-dev/wxt/compare/v0.14.1...v0.14.2)
+
+### 🚀 Enhancements
+
+- Add `filterEntrypoints` option to speed up development ([#344](https://github.com/wxt-dev/wxt/pull/344))
+
+### 🔥 Performance
+
+- Only call `findEntrypoint` once per build ([#342](https://github.com/wxt-dev/wxt/pull/342))
+
+### 🩹 Fixes
+
+- Improve error message and document use of imported variables outside an entrypoint's `main` function ([#346](https://github.com/wxt-dev/wxt/pull/346))
+- Allow `browser.runtime.getURL` to include hashes and query params for HTML paths ([#350](https://github.com/wxt-dev/wxt/pull/350))
+
+### 📖 Documentation
+
+- Fix typos and outdated ui function usage ([#347](https://github.com/wxt-dev/wxt/pull/347))
+
+### 🏡 Chore
+
+- Update templates to `^0.14.0` ([70a4961](https://github.com/wxt-dev/wxt/commit/70a4961))
+- Fix typo in function name ([a329e24](https://github.com/wxt-dev/wxt/commit/a329e24))
+
+### ❤️ Contributors
+
+- Yuns ([@yunsii](http://github.com/yunsii))
+- Armin
+
 ## v0.14.1
 
 [compare changes](https://github.com/wxt-dev/wxt/compare/v0.14.0...v0.14.1)

CONTRIBUTING.md

@@ -57,9 +57,17 @@ pnpm test
 pnpm docs:dev
 ```
 
+## Updating Docs
+
+Documentation is written with VitePress, and is located in the `docs/` directory.
+
+The API reference is generated from JSDoc comments in the source code. If there's a typo or change you want to make in there, you'll need to update the source code instead of a file in the `docs/` directory.
+
 ## Testing
 
-WXT has unit and E2E tests. When making a change or adding a feature, make sure to update the tests or add new ones.
+WXT has unit and E2E tests. When making a change or adding a feature, make sure to update the tests or add new ones, if they exist.
+
+> If they don't exist, feel free to create them, but that's a lot for a one-time contributor. A maintainer might add them to your PR though.
 
 To run tests for a specific file, add the filename at the end of the test command:
 

demo/src/entrypoints/background.ts

@@ -1,33 +1,41 @@
 import messages from 'public/_locales/en/messages.json';
 
-export default defineBackground(() => {
-  console.log(browser.runtime.id);
-  logId();
-  console.log({
-    browser: __BROWSER__,
-    chrome: __IS_CHROME__,
-    firefox: __IS_FIREFOX__,
-    manifestVersion: __MANIFEST_VERSION__,
-    messages,
-  });
+export default defineBackground({
+  // type: 'module',
 
-  // @ts-expect-error: should only accept entrypoints or public assets
-  browser.runtime.getURL('/');
-  browser.runtime.getURL('/background.js');
-  browser.runtime.getURL('/icon/128.png');
+  main() {
+    console.log(browser.runtime.id);
+    logId();
+    console.log({
+      browser: import.meta.env.BROWSER,
+      chrome: import.meta.env.CHROME,
+      firefox: import.meta.env.FIREFOX,
+      manifestVersion: import.meta.env.MANIFEST_VERSION,
+      messages,
+    });
 
-  // @ts-expect-error: should only accept known message names
-  browser.i18n.getMessage('test');
-  browser.i18n.getMessage('prompt_for_name');
-  browser.i18n.getMessage('hello', 'Aaron');
-  browser.i18n.getMessage('bye', ['Aaron']);
-  browser.i18n.getMessage('@@extension_id');
+    // @ts-expect-error: should only accept entrypoints or public assets
+    browser.runtime.getURL('/');
+    browser.runtime.getURL('/background.js');
+    browser.runtime.getURL('/icon/128.png');
+    browser.runtime.getURL('/example.html#hash');
+    browser.runtime.getURL('/example.html?query=param');
+    // @ts-expect-error: should only allow hashes/query params on HTML files
+    browser.runtime.getURL('/icon-128.png?query=param');
 
-  console.log('WXT MODE:', {
-    MODE: import.meta.env.MODE,
-    DEV: import.meta.env.DEV,
-    PROD: import.meta.env.PROD,
-  });
+    // @ts-expect-error: should only accept known message names
+    browser.i18n.getMessage('test');
+    browser.i18n.getMessage('prompt_for_name');
+    browser.i18n.getMessage('hello', 'Aaron');
+    browser.i18n.getMessage('bye', ['Aaron']);
+    browser.i18n.getMessage('@@extension_id');
 
-  storage.setItem('session:startTime', Date.now());
+    console.log('WXT MODE:', {
+      MODE: import.meta.env.MODE,
+      DEV: import.meta.env.DEV,
+      PROD: import.meta.env.PROD,
+    });
+
+    storage.setItem('session:startTime', Date.now());
+  },
 });

docs/.vitepress/config.ts

@@ -90,6 +90,7 @@ export default defineConfig({
             { text: 'Assets', link: '/guide/assets.md' },
             { text: 'Content Script UI', link: '/guide/content-script-ui.md' },
             { text: 'Multiple Browsers', link: '/guide/multiple-browsers.md' },
+            { text: 'ES Modules', link: '/guide/esm.md' },
             { text: 'Auto-imports', link: '/guide/auto-imports.md' },
             { text: 'Vite', link: '/guide/vite.md' },
             { text: 'Remote Code', link: '/guide/remote-code.md' },

docs/guide/content-script-ui.md

@@ -21,6 +21,8 @@ Integrated content script UIs are injected alongside the content of a page. This
 ```ts [Vanilla]
 // entrypoints/example-ui.content.ts
 export default defineContentScript({
+  matches: ['<all_urls>'],
+
   main(ctx) {
     const ui = createIntegratedUi(ctx, {
       position: 'inline',
@@ -45,6 +47,8 @@ import { createApp } from 'vue';
 import App from './App.vue';
 
 export default defineContentScript({
+  matches: ['<all_urls>'],
+
   main(ctx) {
     const ui = createIntegratedUi(ctx, {
       position: 'inline',
@@ -73,6 +77,8 @@ import ReactDOM from 'react-dom/client';
 import App from './App.tsx';
 
 export default defineContentScript({
+  matches: ['<all_urls>'],
+
   main(ctx) {
     const ui = createIntegratedUi(ctx, {
       position: 'inline',
@@ -95,11 +101,13 @@ export default defineContentScript({
 });
 ```
 
-```ts [Svelete]
+```ts [Svelte]
 // entrypoints/example-ui.content/index.ts
 import App from './App.svelte';
 
 export default defineContentScript({
+  matches: ['<all_urls>'],
+
   main(ctx) {
     const ui = createIntegratedUi(ctx, {
       position: 'inline',
@@ -128,6 +136,8 @@ export default defineContentScript({
 import { render } from 'solid-js/web';
 
 export default defineContentScript({
+  matches: ['<all_urls>'],
+
   main(ctx) {
     const ui = createIntegratedUi(ctx, {
       position: 'inline',
@@ -174,6 +184,7 @@ To use `createShadowRootUi`, follow these steps:
 import './style.css';
 
 export default defineContentScript({
+  matches: ['<all_urls>'],
   // 2. Set cssInjectionMode
   cssInjectionMode: 'ui',
 
@@ -182,7 +193,7 @@ export default defineContentScript({
     const ui = await createShadowRootUi(ctx, {
       name: 'example-ui',
       anchor: '#anchor',
-      type: 'inline',
+      position: 'inline',
       onMount(container) {
         // Define how your UI will be mounted inside the container
         const app = document.createElement('p');
@@ -204,6 +215,7 @@ import { createApp } from 'vue';
 import App from './App.vue';
 
 export default defineContentScript({
+  matches: ['<all_urls>'],
   // 2. Set cssInjectionMode
   cssInjectionMode: 'ui',
 
@@ -212,7 +224,7 @@ export default defineContentScript({
     const ui = await createShadowRootUi(ctx, {
       name: 'example-ui',
       anchor: '#anchor',
-      type: 'inline',
+      position: 'inline',
       onMount: (container) => {
         // Define how your UI will be mounted inside the container
         const app = createApp(App);
@@ -238,12 +250,14 @@ import ReactDOM from 'react-dom/client';
 import App from './App.tsx';
 
 export default defineContentScript({
+  matches: ['<all_urls>'],
   // 2. Set cssInjectionMode
   cssInjectionMode: 'ui',
 
-  main(ctx) {
+  async main(ctx) {
     // 3. Define your UI
-    const ui = createIntegratedUi(ctx, {
+    const ui = await createShadowRootUi(ctx, {
+      name: 'example-ui',
       position: 'inline',
       anchor: '#anchor',
       onMount: (container) => {
@@ -264,18 +278,20 @@ export default defineContentScript({
 });
 ```
 
-```ts [Svelete]
+```ts [Svelte]
 // 1. Import the style
 import './style.css';
 import App from './App.svelte';
 
 export default defineContentScript({
+  matches: ['<all_urls>'],
   // 2. Set cssInjectionMode
   cssInjectionMode: 'ui',
 
-  main(ctx) {
+  async main(ctx) {
     // 3. Define your UI
-    const ui = createIntegratedUi(ctx, {
+    const ui = await createShadowRootUi(ctx, {
+      name: 'example-ui',
       position: 'inline',
       anchor: '#anchor',
       onMount: (container) => {
@@ -303,12 +319,14 @@ import './style.css';
 import { render } from 'solid-js/web';
 
 export default defineContentScript({
+  matches: ['<all_urls>'],
   // 2. Set cssInjectionMode
   cssInjectionMode: 'ui',
 
-  main(ctx) {
+  async main(ctx) {
     // 3. Define your UI
-    const ui = createIntegratedUi(ctx, {
+    const ui = await createShadowRootUi(ctx, {
+      name: 'example-ui',
       position: 'inline',
       anchor: '#anchor',
       onMount: (container) => {
@@ -374,13 +392,14 @@ WXT provides a helper function, [`createIframeUi`](/api/wxt/client/functions/cre
 
    ```ts
    export default defineContentScript({
-     // ...
+     matches: ['<all_urls>'],
+
      async main(ctx) {
        // Define the UI
        const ui = await createIframeUi(ctx, {
          page: '/example-iframe.html',
          anchor: '#anchor',
-         type: 'inline',
+         position: 'inline',
          onMount: (wrapper, iframe) => {
            // Add styles to the iframe like width
            iframe.width = 123;

docs/guide/entrypoints.md

@@ -86,3 +86,56 @@ export default defineContentScript({
 :::info
 For a full list of entrypoints and each of their options, see the [`/entrypoints` folder](/entrypoints/background) documentation.
 :::
+
+### Side Effects
+
+You cannot use imported variables outside the `main` function is JS entrypoints. This includes options, as shown below:
+
+```ts
+// entrypoints/content.ts
+import { GOOGLE_MATCHES } from '~/utils/match-patterns';
+
+export default defineContentScript({
+  matches: GOOGLE_MATCHES,
+  main() {
+    // ...
+  },
+});
+```
+
+```
+$ wxt build
+wxt build
+
+WXT 0.14.1
+ℹ Building chrome-mv3 for production with Vite 5.0.5
+✖ Command failed after 360 ms
+
+[8:55:54 AM]  ERROR  entrypoints/content.ts: Cannot use imported variable "GOOGLE_MATCHES" before main function. See https://wxt.dev/guide/entrypoints.html#side-effects
+```
+
+This throws an error because WXT needs to import each entrypoint during the build process to extract its definition (containing the `match`, `run_at`, `include`/`exclude`, etc.) to render the `manifest.json` correctly. Before loading an entrypoint, a transformation is applied to remove all imports. This prevents imported modules (local or NPM) with side-effects from running during the build process, potentially throwing an error.
+
+:::details Why?
+
+When importing your entrypoint to get its definition, the file is imported in a **_node environement_**, and doesn't have access to the `window`, `chrome`, or `browser` globals a web extension ususally has access to. If WXT doesn't remove all the imports from the file, the imported modules could try and access one of these variables, throwing an error.
+
+:::
+
+:::warning
+See [`wxt-dev/wxt#336`](https://github.com/wxt-dev/wxt/issues/336) to track the status of this bug.
+:::
+
+Usually, this error occurs when you try to extract options into a shared file or try to run code outside the `main` function. To fix the example from above, use litteral values when defining an entrypoint instead of importing them:
+
+```ts
+import { GOOGLE_MATCHES } from '~/utils/match-patterns'; // [!code --]
+
+export default defineContentScript({
+  matches: GOOGLE_MATCHES, // [!code --]
+  matches: ['*//*.google.com/*'], // [!code ++]
+  main() {
+    // ...
+  },
+});
+```

docs/guide/esm.md

@@ -0,0 +1,38 @@
+# ES Modules
+
+Configure entrypoints to use ESM at runtime.
+
+Currently, ESM entrypoints are opt-in, so you must configure each entrypoint with that in mind.
+
+## HTML Pages <Badge type="warning" text="≥0.0.1" />
+
+In general, you should always make HTML pages import ESM scripts, unless you need to support old browsers.
+
+To make a script ESM, add `type="module"`:
+
+<!-- prettier-ignore -->
+```html
+<script src="./main.ts"></script> <!-- [!code --] -->
+<script src="./main.ts" type="module"></script> <!-- [!code ++] -->
+```
+
+## Background <Badge type="warning" text="≥0.16.0" />
+
+In your background script, set `type: "module"`:
+
+```ts
+export default defineBackground({
+  type: 'module', // !code ++
+  main() {
+    // ...
+  },
+});
+```
+
+:::warning
+Only MV3 support ESM background scripts/service workers. When targetting MV2, the `type` option is ignored and the background is always bundled into a single file as IIFE.
+:::
+
+## Content Scripts
+
+Coming soon. Follow [Content Script ESM Support #357](https://github.com/wxt-dev/wxt/issues/357) for updates.

docs/guide/extension-apis.md

@@ -57,21 +57,19 @@ Here's a basic request/response example:
 // popup/main.ts
 const res = await browser.runtime.sendMessage('ping');
 
-console.log('res'); // "pong"
+console.log(res); // "pong"
 ```
 
 ```ts
 // background.ts
 export default defineBackground(() => {
-  browser.runtime.onMessage.addEventListener(
-    (message, sender, sendResponse) => {
-      console.log(message); // "ping"
+  browser.runtime.onMessage.addListener((message, sender, sendResponse) => {
+    console.log(message); // "ping"
 
-      // Wait 1 second and respond with "pong"
-      setTimeout(() => sendResponse('pong'), 1000);
-      return true;
-    },
-  );
+    // Wait 1 second and respond with "pong"
+    setTimeout(() => sendResponse('pong'), 1000);
+    return true;
+  });
 });
 ```
 

docs/guide/installation.md

@@ -145,5 +145,6 @@ If you're an experienced web extension developer and think the dev manifest look
 You're ready to build your web extension!
 
 - Learn how to [add entrypoints](./entrypoints) like the popup, options page, or content scripts
+- Configure your entrypoints to [use ESM](./esm) at runtime
 - [Configure WXT](./configuration) by creating a `wxt.config.ts` file
 - Checkout [example projects](https://github.com/wxt-dev/wxt-examples) to see how to perfom common tasks with WXT

docs/guide/multiple-browsers.md

@@ -17,11 +17,9 @@ Separate build targets are written to their own output directories:
 
 To build for a specific browser, pass the `-b --browser` flag from the CLI:
 
-```
-
+```sh
 wxt --browser firefox
 wxt build --browser firefox
-
 ```
 
 By default, it will build for `chrome`. When excluding the [manifest version flags](#target-manifest-version), it will default to the commonly accepted manifest version for that browser.
@@ -112,3 +110,24 @@ export default defineContentScript({
 :::warning
 Only `defineBackground` and `defineContentScript` support per-browser options right now.
 :::
+
+## Runtime
+
+To determine the browser or manifest version at runtime, you can use any of the below variables:
+
+- `import.meta.env.BROWSER`: A string, the target browser, usually equal to the `--browser` flag
+- `import.meta.env.MANIFEST_VERSION`: A number, either `2` or `3`, depending on the manifest version targetted
+- `import.meta.env.CHROME`: A boolean equivalent to `import.meta.env.BROWSER === "chrome"`
+- `import.meta.env.FIREFOX`: A boolean equivalent to `import.meta.env.BROWSER === "firefox"`
+- `import.meta.env.EDGE`: A boolean equivalent to `import.meta.env.BROWSER === "edge"`
+- `import.meta.env.SAFARI`: A boolean equivalent to `import.meta.env.BROWSER === "safari"`
+- `import.meta.env.OPERA`: A boolean equivalent to `import.meta.env.BROWSER === "opera"`
+- `import.meta.env.COMMAND`: A string, `"serve"` when running `wxt` for development or `"build"` in all other cases.
+
+:::info
+These variables are constants defined at build time based on the build target. They do not actually detect which browser the code is running in.
+
+For example, if you build for `--browser chrome` and publish it on Edge, `import.meta.env.BROWSER` will be `"chrome"`, not `"edge"`. You have to build a separate ZIP for `--browser edge` before `import.meta.env.BROWSER` will be `"edge"`.
+
+If you need to know the actual browser your code is being ran on, you should use a [user agent parser](https://www.npmjs.com/package/ua-parser-js).
+:::

docs/guide/publishing.md

@@ -1,94 +1,66 @@
+---
+outline: deep
+---
+
 # Publishing
 
-WXT offers several utilities that simplify the publishing process.
+WXT will help you ZIP your extensions and submit them to the stores for review.
 
 ## First Time Publishing
 
-If you're publishing an extension to a store for the first time, you must manually navigate the process. Each store has unique steps and requirements that you need to familiarize yourself with.
+If you're publishing an extension to a store for the first time, you must manually navigate the process. WXT doesn't help you create listings, each store has unique steps and requirements that you need to familiarize yourself with.
 
-Each store requires that a ZIP file be uploaded. You can generate these using the `wxt zip` command:
+For specific details about each store, see the stores sections below.
+
+- [Chrome Web Store](#chrome-web-store)
+- [Firefox Addon Store](#firefox-addon-store)
+- [Edge Addons](#edge-addons)
+
+## Automation
+
+WXT provides two commands to help automate the release process:
+
+- `wxt submit`: Submit new versions of your extension for review (and publish them automatically once approved)
+- `wxt submit init`: Help setup all the required secrets and options for the `wxt submit` command
+
+To get started, run `wxt submit init` and follow the prompts. Once finished, you should have a `.env.submit` file! WXT will use this file to submit your updates.
+
+> In CI, make sure you add all the environment variables to the submit step.
+
+To release an update, build all the ZIPs you plan on releasing:
 
 ```sh
 wxt zip
 wxt zip -b firefox
-# etc
 ```
 
-Generated ZIP files are stored in the `.output` directory.
+Then run the `wxt submit` command, passing in all the ZIP files you want to release. In this case, we'll do a release for all 3 major stores: Chrome Web Store, Edge Addons, and Firefox Addons Store.
 
-## Automation
+If it's your first time running the command, you'll want to test your secrets by passing the `--dry-run` flag:
 
-To automate releasing updates, use the [`publish-browser-extension`](https://www.npmjs.com/package/publish-browser-extension) package.
+```sh
+wxt submit --dry-run \
+  --chrome-zip .output/<your-extension>-<version>-chrome.zip \
+  --firefox-zip .output/<your-extension>-<version>-firefox.zip --firefox-sources-zip .output/<your-extension>-<version>-sources.zip \
+  --edge-zip .output/<your-extension>-<version>-chrome.zip
+```
 
-:::info
-🚧 WXT plans to eventually incorporate the `publish-browser-extension` package into its own `wxt submit` command.
+If the dry run passes, remove the flag and do the actual release:
+
+```sh
+wxt submit \
+  --chrome-zip .output/<your-extension>-<version>-chrome.zip \
+  --firefox-zip .output/<your-extension>-<version>-firefox.zip --firefox-sources-zip .output/<your-extension>-<version>-sources.zip \
+  --edge-zip .output/<your-extension>-<version>-chrome.zip
+```
+
+:::tip
+If you only need to release to a single store, only pass that store's ZIP flag.
 :::
 
-1. Install the necessary dependencies:
-
-   ```sh
-   pnpm add -D publish-browser-extension env-cmd
-   ```
-
-2. Add scripts to your `package.json` file:
-
-   ```json
-   {
-     "scripts": {
-       "submit": "env-cmd -f .env.submit -- publish-extension",
-       "submit:dry": "env-cmd -f .env.submit -- publish-extension --dry-run"
-     }
-   }
-   ```
-
-3. Create a `.env.submit` file and include the code below. If you're not publishing to certain stores, simply ignore their respective variables.
-
-   ```txt
-   CHROME_EXTENSION_ID=""
-   CHROME_CLIENT_ID=""
-   CHROME_CLIENT_SECRET=""
-   CHROME_REFRESH_TOKEN=""
-
-   FIREFOX_EXTENSION_ID=""
-   FIREFOX_JWT_ISSUER=""
-   FIREFOX_JWT_SECRET=""
-
-   EDGE_PRODUCT_ID=""
-   EDGE_CLIENT_ID=""
-   EDGE_CLIENT_SECRET=""
-   EDGE_ACCESS_TOKEN_URL=""
-   ```
-
-   > Each value will be filled in during the next step.
-
-4. Run `npx publish-extension --help` for assistance with filling out all the values. Insert the obtained values within the double quotes.
-
-5. ZIP all the targets you plan to publish, in this case Chrome and Firefox.
-
-   ```sh
-   wxt zip
-   wxt zip -b firefox
-   ```
-
-6. Test your credentials by running the `submit:dry` command:
-
-   ```sh
-   pnpm submit:dry \
-     --chrome-zip .output/your-extension-X.Y.Z-chrome.zip \
-     --firefox-zip .output/your-extension-X.Y.Z-firefox.zip \
-     --firefox-sources-zip .output/your-extension-X.Y.Z-sources.zip \
-     --edge-zip .output/your-extension-X.Y.Z-chrome.zip
-   ```
-
-7. Upload and submit your extension for review:
-
-   ```sh
-   pnpm submit \
-     --chrome-zip .output/your-extension-X.Y.Z-chrome.zip \
-     --firefox-zip .output/your-extension-X.Y.Z-firefox.zip \
-     --firefox-sources-zip .output/your-extension-X.Y.Z-sources.zip \
-     --edge-zip .output/your-extension-X.Y.Z-chrome.zip
-   ```
+:::tip
+See the [Firefox Addon Store](#firefox-addon-store) section for more details about the `--firefox-sources-zip` option.
+:::
 
 ## GitHub Action
 
@@ -98,9 +70,11 @@ Here's an example of a GitHub Action to automate submiting new versions of your
 # TODO
 ```
 
-## Chrome Web Store
+## Stores
 
-✅ Automated &bull; [Developer Dashboard](https://chrome.google.com/webstore/developer/dashboard) &bull; [Publishing Docs](https://developer.chrome.com/docs/webstore/publish/)
+### Chrome Web Store
+
+> ✅ Supported &bull; [Developer Dashboard](https://chrome.google.com/webstore/developer/dashboard) &bull; [Publishing Docs](https://developer.chrome.com/docs/webstore/publish/)
 
 To create a ZIP for Chrome:
 
@@ -108,15 +82,15 @@ To create a ZIP for Chrome:
 wxt zip
 ```
 
-## Firefox Addon Store
+### Firefox Addon Store
 
-✅ Automated &bull; [Developer Dashboard](https://addons.mozilla.org/developers/) &bull; [Publishing Docs](https://extensionworkshop.com/documentation/publish/submitting-an-add-on/)
+> ✅ Supported &bull; [Developer Dashboard](https://addons.mozilla.org/developers/) &bull; [Publishing Docs](https://extensionworkshop.com/documentation/publish/submitting-an-add-on/)
 
 Firefox requires you to upload a ZIP of your source code. This allows them to rebuild your extension and review the code in a readable way. More details can be found in [Firefox's docs](https://extensionworkshop.com/documentation/publish/source-code-submission/).
 
-WXT and `publish-browser-extension` both fully support generating and automatically submitting a source code ZIP.
+WXT fully supports generating and automatically submitting a source code ZIP.
 
-When you run `wxt zip -b firefox`, your sources are zipped into the `.output` directory along with your built extension. WXT is configured to exclude certain files such as config files, hidden files, and tests. However, it's important to manually check the ZIP to ensure it only contains the files necessary to rebuild your extension.
+When you run `wxt zip -b firefox`, your sources are zipped into the `.output` directory alongside the extension. WXT will automatically exclude certain files such as config files, hidden files, and tests. However, it's important to manually check the ZIP to ensure it only contains the files necessary to rebuild your extension.
 
 To customize which files are zipped, add the `zip` option to your config file.
 
@@ -152,22 +126,34 @@ yarn zip:firefox
 
 :::
 
-Ensure that you have a `README.md` or `SOURCE_CODE_REVIEW.md` file with the above commands so that the Firefox team knows how to build your extension.
-
-## Safari
-
-🚧 Not automated at this time
+Make sure the build output is the exact same when running `wxt build -b firefox` in your main project and inside the zipped sources.
 
 :::warning
-🚧 WXT does not currently support automated publishing for Safari. Safari extensions require a native MacOS or iOS app wrapper, which WXT cannot create at this time. For now, if you want to publish to Safari, follow this guide:
-
-https://developer.apple.com/documentation/safariservices/safari_web_extensions/distributing_your_safari_web_extension
+If you use a `.env` files, they can effect the chunk hashes in the output directory. Either delete the .env file before running `wxt zip -b firefox`, or include it in your sources zip with the [`zip.includeSources`](/api/wxt/interfaces/InlineConfig#includesources) option. Be careful to not include any secrets in your `.env` files.
 
+See Issue [#377](https://github.com/wxt-dev/wxt/issues/377) for more details.
 :::
 
-## Edge Addons
+Ensure that you have a `README.md` or `SOURCE_CODE_REVIEW.md` file with the above commands so that the Firefox team knows how to build your extension.
 
-✅ Automated &bull; [Developer Dashboard](https://aka.ms/PartnerCenterLogin) &bull; [Publishing Docs](https://learn.microsoft.com/en-us/microsoft-edge/extensions-chromium/publish/publish-extension)
+### Safari
+
+> 🚧 Not supported yet
+
+WXT does not currently support automated publishing for Safari. Safari extensions require a native MacOS or iOS app wrapper, which WXT does not create yet. For now, if you want to publish to Safari, follow this guide:
+
+- [Converting a web extension for Safari](https://developer.apple.com/documentation/safariservices/safari_web_extensions/converting_a_web_extension_for_safari) - "Convert your existing extension to a Safari web extension using Xcode’s command-line tool."
+
+When running the `safari-web-extension-converter` CLI tool, pass the `.output/safari-mv2` or `.output/safari-mv3` directory, not your source code directory.
+
+```sh
+pnpm wxt build -b safari
+xcrun safari-web-extension-converter .output/safari-mv2
+```
+
+### Edge Addons
+
+> ✅ Supported &bull; [Developer Dashboard](https://aka.ms/PartnerCenterLogin) &bull; [Publishing Docs](https://learn.microsoft.com/en-us/microsoft-edge/extensions-chromium/publish/publish-extension)
 
 No need to create a specific ZIP for Edge. If you're already publishing to the Chrome Web Store, you can reuse your Chrome ZIP.
 

docs/guide/testing.md

@@ -19,7 +19,7 @@ If you want to try to use a different framework for unit tests, you will need to
 - **Auto-imports**: Add `unimport` to your test environment or disable them by setting `imports: false` in your `wxt.config.ts` file
 - **`browser` mock**: Mock the `webextension-polyfill` module globally with `wxt/dist/virtual/mock-browser.js`
 - **[Remote Code Bundling](/guide/remote-code)**: If you use it, configure your environment to handle the `url:` module prefix
-- **Global Variables**: If you consume them, manually define globals provided by WXT (like `__BROWSER__`) by adding them to the global scope before accessing them (`globalThis.__BROWSER__ = "chrome"`)
+- **Global Variables**: If you consume them, manually define globals provided by WXT (like `import.meta.env.BROWSER`) by adding them to the global scope before accessing them (`import.meta.env.BROWSER = "chrome"`)
 - **Import paths**: If you use the `@/` or `~/` path aliases, add them to your test environment
 
 [Here's how Vitest is configured](https://github.com/wxt-dev/wxt/blob/main/src/testing/wxt-vitest-plugin.ts) for reference.

e2e/tests/output-structure.test.ts

@@ -227,4 +227,169 @@ describe('Output Directory Structure', () => {
       true,
     );
   });
+
+  it('should generate ESM background script when type=module', async () => {
+    const project = new TestProject();
+    project.addFile(
+      'utils/log.ts',
+      `export function logHello(name: string) {
+        console.log(\`Hello \${name}!\`);
+      }`,
+    );
+    project.addFile(
+      'entrypoints/background.ts',
+      `export default defineBackground({
+        type: "module",
+        main() {
+          logHello("background");
+        },
+      })`,
+    );
+    project.addFile(
+      'entrypoints/popup/index.html',
+      `<html>
+        <head>
+          <script type="module" src="./main.ts"></script>
+        </head>
+      </html>`,
+    );
+    project.addFile('entrypoints/popup/main.ts', `logHello('popup')`);
+
+    await project.build({
+      experimental: {
+        // Simplify the build output for comparison
+        includeBrowserPolyfill: false,
+      },
+      vite: () => ({
+        build: {
+          // Make output for snapshot readible
+          minify: false,
+        },
+      }),
+    });
+
+    expect(await project.serializeFile('.output/chrome-mv3/background.js'))
+      .toMatchInlineSnapshot(`
+      ".output/chrome-mv3/background.js
+      ----------------------------------------
+      import { l as logHello } from "./chunks/log-bezs0tt4.js";
+      function defineBackground(arg) {
+        if (typeof arg === "function")
+          return { main: arg };
+        return arg;
+      }
+      const definition = defineBackground({
+        type: "module",
+        main() {
+          logHello("background");
+        }
+      });
+      chrome;
+      function print(method, ...args) {
+        return;
+      }
+      var logger = {
+        debug: (...args) => print(console.debug, ...args),
+        log: (...args) => print(console.log, ...args),
+        warn: (...args) => print(console.warn, ...args),
+        error: (...args) => print(console.error, ...args)
+      };
+      try {
+        const res = definition.main();
+        if (res instanceof Promise) {
+          console.warn(
+            "The background's main() function return a promise, but it must be synchonous"
+          );
+        }
+      } catch (err) {
+        logger.error("The background crashed on startup!");
+        throw err;
+      }
+      "
+    `);
+  });
+
+  it('should generate IIFE background script when type=undefined', async () => {
+    const project = new TestProject();
+    project.addFile(
+      'utils/log.ts',
+      `export function logHello(name: string) {
+          console.log(\`Hello \${name}!\`);
+        }`,
+    );
+    project.addFile(
+      'entrypoints/background.ts',
+      `export default defineBackground({
+          main() {
+            logHello("background");
+          },
+        })`,
+    );
+    project.addFile(
+      'entrypoints/popup/index.html',
+      `<html>
+          <head>
+            <script type="module" src="./main.ts"></script>
+          </head>
+        </html>`,
+    );
+    project.addFile('entrypoints/popup/main.ts', `logHello('popup')`);
+
+    await project.build({
+      experimental: {
+        // Simplify the build output for comparison
+        includeBrowserPolyfill: false,
+      },
+      vite: () => ({
+        build: {
+          // Make output for snapshot readible
+          minify: false,
+        },
+      }),
+    });
+
+    expect(await project.serializeFile('.output/chrome-mv3/background.js'))
+      .toMatchInlineSnapshot(`
+        ".output/chrome-mv3/background.js
+        ----------------------------------------
+        (function() {
+          "use strict";
+          function defineBackground(arg) {
+            if (typeof arg === "function")
+              return { main: arg };
+            return arg;
+          }
+          function logHello(name) {
+            console.log(\`Hello \${name}!\`);
+          }
+          const definition = defineBackground({
+            main() {
+              logHello("background");
+            }
+          });
+          chrome;
+          function print(method, ...args) {
+            return;
+          }
+          var logger = {
+            debug: (...args) => print(console.debug, ...args),
+            log: (...args) => print(console.log, ...args),
+            warn: (...args) => print(console.warn, ...args),
+            error: (...args) => print(console.error, ...args)
+          };
+          try {
+            const res = definition.main();
+            if (res instanceof Promise) {
+              console.warn(
+                "The background's main() function return a promise, but it must be synchonous"
+              );
+            }
+          } catch (err) {
+            logger.error("The background crashed on startup!");
+            throw err;
+          }
+        })();
+        "
+      `);
+  });
 });

e2e/tests/typescript-project.test.ts

@@ -14,16 +14,19 @@ describe('TypeScript Project', () => {
       ----------------------------------------
       // Generated by wxt
       export {}
-      declare global {
-        const __MANIFEST_VERSION__: 2 | 3;
-        const __BROWSER__: string;
-        const __IS_CHROME__: boolean;
-        const __IS_FIREFOX__: boolean;
-        const __IS_SAFARI__: boolean;
-        const __IS_EDGE__: boolean;
-        const __IS_OPERA__: boolean;
-        const __COMMAND__: "build" | "serve";
-        const __ENTRYPOINT__: string;
+      interface ImportMetaEnv {
+        readonly MANIFEST_VERSION: 2 | 3;
+        readonly BROWSER: string;
+        readonly CHROME: boolean;
+        readonly FIREFOX: boolean;
+        readonly SAFARI: boolean;
+        readonly EDGE: boolean;
+        readonly OPERA: boolean;
+        readonly COMMAND: "build" | "serve";
+        readonly ENTRYPOINT: string;
+      }
+      interface ImportMeta {
+        readonly env: ImportMetaEnv
       }
       "
     `);
@@ -49,8 +52,10 @@ describe('TypeScript Project', () => {
           | "/options.html"
           | "/popup.html"
           | "/sandbox.html"
+        type HtmlPublicPath = Extract<PublicPath, \`\${string}.html\`>
         export interface WxtRuntime extends Runtime.Static {
           getURL(path: PublicPath): string;
+          getURL(path: \`\${HtmlPublicPath}\${string}\`): string;
         }
       }
       "
@@ -131,7 +136,7 @@ describe('TypeScript Project', () => {
             options?: GetMessageOptions,
           ): string;
           /**
-           * 
+           * No message description.
            *
            * "<browser.i18n.getUiLocale()>"
            */

package.json

@@ -1,7 +1,7 @@
 {
   "name": "wxt",
   "type": "module",
-  "version": "0.14.1",
+  "version": "0.16.0",
   "description": "Next gen framework for developing web extensions",
   "engines": {
     "node": ">=18",
@@ -82,7 +82,7 @@
     }
   },
   "scripts": {
-    "wxt": "tsx src/cli.ts",
+    "wxt": "tsx src/cli/index.ts",
     "build": "tsx scripts/build.ts",
     "format": "prettier --write .",
     "format:check": "prettier --check .",
@@ -125,15 +125,18 @@
     "jiti": "^1.21.0",
     "json5": "^2.2.3",
     "linkedom": "^0.16.1",
+    "manage-path": "^2.0.0",
     "minimatch": "^9.0.3",
+    "natural-compare": "^1.4.0",
     "normalize-path": "^3.0.0",
     "ora": "^7.0.1",
     "picocolors": "^1.0.0",
     "prompts": "^2.4.2",
+    "publish-browser-extension": "^2.1.0",
     "rollup-plugin-visualizer": "^5.9.2",
     "unimport": "^3.4.0",
-    "vite": "^5.0.0",
-    "web-ext-run": "^0.1.0",
+    "vite": "^5.0.12",
+    "web-ext-run": "^0.2.0",
     "webextension-polyfill": "^0.10.0",
     "zip-dir": "^2.0.0"
   },
@@ -141,6 +144,7 @@
     "@faker-js/faker": "^8.3.1",
     "@types/fs-extra": "^11.0.4",
     "@types/lodash.merge": "^4.6.9",
+    "@types/natural-compare": "^1.4.3",
     "@types/node": "^20.10.3",
     "@types/normalize-path": "^3.0.2",
     "@types/prompts": "^2.4.9",

scripts/build.ts

@@ -94,9 +94,14 @@ const config: tsup.Options[] = [
   {
     ...preset,
     entry: {
-      cli: 'src/cli.ts',
+      cli: 'src/cli/index.ts',
     },
     format: ['esm'],
+    banner: {
+      // Fixes dynamic require of nodejs modules. See https://github.com/wxt-dev/wxt/issues/355
+      // https://github.com/evanw/esbuild/issues/1921#issuecomment-1152991694
+      js: "import { createRequire } from 'module';const require = createRequire(import.meta.url);",
+    },
   },
 ];
 

src/cli/__tests__/index.test.ts

@@ -0,0 +1,380 @@
+import { describe, it, vi, beforeEach, expect } from 'vitest';
+import { build } from '~/core/build';
+import { createServer } from '~/core/create-server';
+import { zip } from '~/core/zip';
+import { prepare } from '~/core/prepare';
+import { clean } from '~/core/clean';
+import { initialize } from '~/core/initialize';
+import { mock } from 'vitest-mock-extended';
+import consola from 'consola';
+
+vi.mock('~/core/build');
+const buildMock = vi.mocked(build);
+
+vi.mock('~/core/create-server');
+const createServerMock = vi.mocked(createServer);
+
+vi.mock('~/core/zip');
+const zipMock = vi.mocked(zip);
+
+vi.mock('~/core/prepare');
+const prepareMock = vi.mocked(prepare);
+
+vi.mock('~/core/clean');
+const cleanMock = vi.mocked(clean);
+
+vi.mock('~/core/initialize');
+const initializeMock = vi.mocked(initialize);
+
+consola.wrapConsole();
+
+const ogArgv = process.argv;
+
+function mockArgv(...args: string[]) {
+  process.argv = ['/bin/node', 'bin/wxt.mjs', ...args];
+}
+
+async function importCli() {
+  await import('~/cli');
+}
+
+describe('CLI', () => {
+  beforeEach(() => {
+    vi.resetModules();
+    process.argv = ogArgv;
+    createServerMock.mockResolvedValue(mock());
+  });
+
+  describe('dev', () => {
+    it('should not pass any config when no flags are passed', async () => {
+      mockArgv();
+      await importCli();
+
+      expect(createServerMock).toBeCalledWith({});
+    });
+
+    it('should respect passing a custom root', async () => {
+      mockArgv('path/to/root');
+      await importCli();
+
+      expect(createServerMock).toBeCalledWith({
+        root: 'path/to/root',
+      });
+    });
+
+    it('should respect a custom config file', async () => {
+      mockArgv('-c', './path/to/config.ts');
+      await importCli();
+
+      expect(createServerMock).toBeCalledWith({
+        configFile: './path/to/config.ts',
+      });
+    });
+
+    it('should respect passing a custom mode', async () => {
+      mockArgv('-m', 'development');
+      await importCli();
+
+      expect(createServerMock).toBeCalledWith({
+        mode: 'development',
+      });
+    });
+
+    it('should respect passing a custom browser', async () => {
+      mockArgv('-b', 'firefox');
+      await importCli();
+
+      expect(createServerMock).toBeCalledWith({
+        browser: 'firefox',
+      });
+    });
+
+    it('should pass correct filtered entrypoints', async () => {
+      mockArgv('-e', 'popup', '-e', 'options');
+      await importCli();
+
+      expect(createServerMock).toBeCalledWith({
+        filterEntrypoints: ['popup', 'options'],
+      });
+    });
+
+    it('should respect passing --mv2', async () => {
+      mockArgv('--mv2');
+      await importCli();
+
+      expect(createServerMock).toBeCalledWith({
+        manifestVersion: 2,
+      });
+    });
+
+    it('should respect passing --mv3', async () => {
+      mockArgv('--mv3');
+      await importCli();
+
+      expect(createServerMock).toBeCalledWith({
+        manifestVersion: 3,
+      });
+    });
+
+    it('should respect passing --debug', async () => {
+      mockArgv('--debug');
+      await importCli();
+
+      expect(createServerMock).toBeCalledWith({
+        debug: true,
+      });
+    });
+  });
+
+  describe('build', () => {
+    it('should not pass any config when no flags are passed', async () => {
+      mockArgv('build');
+      await importCli();
+
+      expect(buildMock).toBeCalledWith({});
+    });
+
+    it('should respect passing a custom root', async () => {
+      mockArgv('build', 'path/to/root');
+      await importCli();
+
+      expect(buildMock).toBeCalledWith({
+        root: 'path/to/root',
+      });
+    });
+
+    it('should respect a custom config file', async () => {
+      mockArgv('build', '-c', './path/to/config.ts');
+      await importCli();
+
+      expect(buildMock).toBeCalledWith({
+        configFile: './path/to/config.ts',
+      });
+    });
+
+    it('should respect passing a custom mode', async () => {
+      mockArgv('build', '-m', 'development');
+      await importCli();
+
+      expect(buildMock).toBeCalledWith({
+        mode: 'development',
+      });
+    });
+
+    it('should respect passing a custom browser', async () => {
+      mockArgv('build', '-b', 'firefox');
+      await importCli();
+
+      expect(buildMock).toBeCalledWith({
+        browser: 'firefox',
+      });
+    });
+
+    it('should pass correct filtered entrypoints', async () => {
+      mockArgv('build', '-e', 'popup', '-e', 'options');
+      await importCli();
+
+      expect(buildMock).toBeCalledWith({
+        filterEntrypoints: ['popup', 'options'],
+      });
+    });
+
+    it('should respect passing --mv2', async () => {
+      mockArgv('build', '--mv2');
+      await importCli();
+
+      expect(buildMock).toBeCalledWith({
+        manifestVersion: 2,
+      });
+    });
+
+    it('should respect passing --mv3', async () => {
+      mockArgv('build', '--mv3');
+      await importCli();
+
+      expect(buildMock).toBeCalledWith({
+        manifestVersion: 3,
+      });
+    });
+
+    it('should include analysis in the build', async () => {
+      mockArgv('build', '--analyze');
+      await importCli();
+
+      expect(buildMock).toBeCalledWith({
+        analysis: {
+          enabled: true,
+        },
+      });
+    });
+
+    it('should respect passing --debug', async () => {
+      mockArgv('build', '--debug');
+      await importCli();
+
+      expect(buildMock).toBeCalledWith({
+        debug: true,
+      });
+    });
+  });
+
+  describe('zip', () => {
+    it('should not pass any config when no flags are passed', async () => {
+      mockArgv('zip');
+      await importCli();
+
+      expect(zipMock).toBeCalledWith({});
+    });
+
+    it('should respect passing a custom root', async () => {
+      mockArgv('zip', 'path/to/root');
+      await importCli();
+
+      expect(zipMock).toBeCalledWith({
+        root: 'path/to/root',
+      });
+    });
+
+    it('should respect a custom config file', async () => {
+      mockArgv('zip', '-c', './path/to/config.ts');
+      await importCli();
+
+      expect(zipMock).toBeCalledWith({
+        configFile: './path/to/config.ts',
+      });
+    });
+
+    it('should respect passing a custom mode', async () => {
+      mockArgv('zip', '-m', 'development');
+      await importCli();
+
+      expect(zipMock).toBeCalledWith({
+        mode: 'development',
+      });
+    });
+
+    it('should respect passing a custom browser', async () => {
+      mockArgv('zip', '-b', 'firefox');
+      await importCli();
+
+      expect(zipMock).toBeCalledWith({
+        browser: 'firefox',
+      });
+    });
+
+    it('should respect passing --mv2', async () => {
+      mockArgv('zip', '--mv2');
+      await importCli();
+
+      expect(zipMock).toBeCalledWith({
+        manifestVersion: 2,
+      });
+    });
+
+    it('should respect passing --mv3', async () => {
+      mockArgv('zip', '--mv3');
+      await importCli();
+
+      expect(zipMock).toBeCalledWith({
+        manifestVersion: 3,
+      });
+    });
+
+    it('should respect passing --debug', async () => {
+      mockArgv('zip', '--debug');
+      await importCli();
+
+      expect(zipMock).toBeCalledWith({
+        debug: true,
+      });
+    });
+  });
+
+  describe('prepare', () => {
+    it('should not pass any config when no flags are passed', async () => {
+      mockArgv('prepare');
+      await importCli();
+
+      expect(prepareMock).toBeCalledWith({});
+    });
+
+    it('should respect passing a custom root', async () => {
+      mockArgv('prepare', 'path/to/root');
+      await importCli();
+
+      expect(prepareMock).toBeCalledWith({
+        root: 'path/to/root',
+      });
+    });
+
+    it('should respect a custom config file', async () => {
+      mockArgv('prepare', '-c', './path/to/config.ts');
+      await importCli();
+
+      expect(prepareMock).toBeCalledWith({
+        configFile: './path/to/config.ts',
+      });
+    });
+
+    it('should respect passing --debug', async () => {
+      mockArgv('prepare', '--debug');
+      await importCli();
+
+      expect(prepareMock).toBeCalledWith({
+        debug: true,
+      });
+    });
+  });
+
+  describe('clean', () => {
+    it('should not pass any config when no flags are passed', async () => {
+      mockArgv('clean');
+      await importCli();
+
+      expect(cleanMock).toBeCalledWith(undefined);
+    });
+
+    it('should respect passing a custom root', async () => {
+      mockArgv('clean', 'path/to/root');
+      await importCli();
+
+      expect(cleanMock).toBeCalledWith('path/to/root');
+    });
+  });
+
+  describe('init', () => {
+    it('should not pass any options when no flags are passed', async () => {
+      mockArgv('init');
+      await importCli();
+
+      expect(initializeMock).toBeCalledWith({});
+    });
+
+    it('should respect the provided folder', async () => {
+      mockArgv('init', 'path/to/folder');
+      await importCli();
+
+      expect(initializeMock).toBeCalledWith({
+        directory: 'path/to/folder',
+      });
+    });
+
+    it('should respect passing --template', async () => {
+      mockArgv('init', '-t', 'vue');
+      await importCli();
+
+      expect(initializeMock).toBeCalledWith({
+        template: 'vue',
+      });
+    });
+
+    it('should respect passing --pm', async () => {
+      mockArgv('init', '--pm', 'pnpm');
+      await importCli();
+
+      expect(initializeMock).toBeCalledWith({
+        packageManager: 'pnpm',
+      });
+    });
+  });
+});

src/cli/cli-utils.ts

@@ -0,0 +1,93 @@
+import { CAC, Command } from 'cac';
+import consola, { LogLevels } from 'consola';
+import { getInternalConfig } from '~/core/utils/building';
+import { exec } from '~/core/utils/exec';
+import { printHeader } from '~/core/utils/log';
+import { formatDuration } from '~/core/utils/time';
+import { ValidationError } from '~/core/utils/validation';
+
+/**
+ * Wrap an action handler to add a timer, error handling, and maybe enable debug mode.
+ */
+export function wrapAction(
+  cb: (
+    ...args: any[]
+  ) => void | { isOngoing?: boolean } | Promise<void | { isOngoing?: boolean }>,
+  options?: {
+    disableFinishedLog?: boolean;
+  },
+) {
+  return async (...args: any[]) => {
+    // Enable consola's debug mode globally at the start of all commands when the `--debug` flag is
+    // passed
+    const isDebug = !!args.find((arg) => arg?.debug);
+    if (isDebug) {
+      consola.level = LogLevels.debug;
+    }
+
+    const startTime = Date.now();
+    try {
+      printHeader();
+
+      const status = await cb(...args);
+
+      if (!status?.isOngoing && !options?.disableFinishedLog)
+        consola.success(
+          `Finished in ${formatDuration(Date.now() - startTime)}`,
+        );
+    } catch (err) {
+      consola.fail(
+        `Command failed after ${formatDuration(Date.now() - startTime)}`,
+      );
+      if (err instanceof ValidationError) {
+        // Don't log these errors, they've already been logged
+      } else {
+        consola.error(err);
+      }
+      process.exit(1);
+    }
+  };
+}
+
+/**
+ * Array flags, when not passed, are either `undefined` or `[undefined]`. This function filters out
+ * the
+ */
+export function getArrayFromFlags<T>(
+  flags: any,
+  name: string,
+): T[] | undefined {
+  const array = [flags[name]].flat() as Array<T | undefined>;
+  const result = array.filter((item) => item != null) as T[];
+  return result.length ? result : undefined;
+}
+
+const aliasCommandNames = new Set<string>();
+export function createAliasedCommand(
+  base: CAC,
+  name: string,
+  alias: string,
+  docsUrl: string,
+) {
+  const aliasedCommand = base
+    .command(name, `Alias for ${alias} (${docsUrl})`)
+    .allowUnknownOptions()
+    .action(async () => {
+      try {
+        const config = await getInternalConfig({}, 'build');
+        const args = process.argv.slice(
+          process.argv.indexOf(aliasedCommand.name) + 1,
+        );
+        await exec(config, alias, args, {
+          stdio: 'inherit',
+        });
+      } catch {
+        // Let the other aliased CLI log errors, just exit
+        process.exit(1);
+      }
+    });
+  aliasCommandNames.add(aliasedCommand.name);
+}
+export function isAliasedCommand(command: Command | undefined): boolean {
+  return !!command && aliasCommandNames.has(command.name);
+}

src/cli/commands.ts

@@ -1,16 +1,12 @@
 import cac from 'cac';
-import { version } from '~/version';
 import { build, clean, createServer, initialize, prepare, zip } from '~/core';
-import consola, { LogLevels } from 'consola';
-import { printHeader } from '~/core/utils/log';
-import { formatDuration } from '~/core/utils/time';
-
-// TODO: Remove. See https://github.com/wxt-dev/wxt/issues/277
-process.env.VITE_CJS_IGNORE_WARNING = 'true';
+import {
+  createAliasedCommand,
+  getArrayFromFlags,
+  wrapAction,
+} from './cli-utils';
 
 const cli = cac('wxt');
-cli.help();
-cli.version(version);
 
 cli.option('--debug', 'enable debug mode');
 
@@ -20,6 +16,13 @@ cli
   .option('-c, --config <file>', 'use specified config file')
   .option('-m, --mode <mode>', 'set env mode')
   .option('-b, --browser <browser>', 'specify a browser')
+  .option(
+    '-e, --filter-entrypoint <entrypoint>',
+    'only build specific entrypoints',
+    {
+      type: [],
+    },
+  )
   .option('--mv3', 'target manifest v3')
   .option('--mv2', 'target manifest v2')
   .action(
@@ -31,6 +34,7 @@ cli
         manifestVersion: flags.mv3 ? 3 : flags.mv2 ? 2 : undefined,
         configFile: flags.config,
         debug: flags.debug,
+        filterEntrypoints: getArrayFromFlags(flags, 'filterEntrypoint'),
       });
       await server.start();
       return { isOngoing: true };
@@ -43,6 +47,13 @@ cli
   .option('-c, --config <file>', 'use specified config file')
   .option('-m, --mode <mode>', 'set env mode')
   .option('-b, --browser <browser>', 'specify a browser')
+  .option(
+    '-e, --filter-entrypoint <entrypoint>',
+    'only build specific entrypoints',
+    {
+      type: [],
+    },
+  )
   .option('--mv3', 'target manifest v3')
   .option('--mv2', 'target manifest v2')
   .option('--analyze', 'visualize extension bundle')
@@ -55,9 +66,8 @@ cli
         manifestVersion: flags.mv3 ? 3 : flags.mv2 ? 2 : undefined,
         configFile: flags.config,
         debug: flags.debug,
-        analysis: {
-          enabled: flags.analyze,
-        },
+        analysis: flags.analyze ? { enabled: true } : undefined,
+        filterEntrypoints: getArrayFromFlags(flags, 'filterEntrypoint'),
       });
     }),
   );
@@ -125,43 +135,12 @@ cli
     ),
   );
 
-cli.parse();
+// SUBMIT
+createAliasedCommand(
+  cli,
+  'submit',
+  'publish-extension',
+  'https://www.npmjs.com/publish-browser-extension',
+);
 
-/**
- * Wrap an action handler to add a timer, error handling, and maybe enable debug mode.
- */
-function wrapAction(
-  cb: (
-    ...args: any[]
-  ) => void | { isOngoing?: boolean } | Promise<void | { isOngoing?: boolean }>,
-  options?: {
-    disableFinishedLog?: boolean;
-  },
-) {
-  return async (...args: any[]) => {
-    // Enable consola's debug mode globally at the start of all commands when the `--debug` flag is
-    // passed
-    const isDebug = !!args.find((arg) => arg?.debug);
-    if (isDebug) {
-      consola.level = LogLevels.debug;
-    }
-
-    const startTime = Date.now();
-    try {
-      printHeader();
-
-      const status = await cb(...args);
-
-      if (!status?.isOngoing && !options?.disableFinishedLog)
-        consola.success(
-          `Finished in ${formatDuration(Date.now() - startTime)}`,
-        );
-    } catch (err) {
-      consola.fail(
-        `Command failed after ${formatDuration(Date.now() - startTime)}`,
-      );
-      consola.error(err);
-      process.exit(1);
-    }
-  };
-}
+export default cli;

src/cli/index.ts

@@ -0,0 +1,19 @@
+import cli from './commands';
+import { version } from '~/version';
+import { isAliasedCommand } from './cli-utils';
+
+// TODO: Remove. See https://github.com/wxt-dev/wxt/issues/277
+process.env.VITE_CJS_IGNORE_WARNING = 'true';
+
+// Grab the command that we're trying to run
+cli.parse(process.argv, { run: false });
+
+// If it's not an alias, add the help and version options, then parse again
+if (!isAliasedCommand(cli.matchedCommand)) {
+  cli.help();
+  cli.version(version);
+  cli.parse(process.argv, { run: false });
+}
+
+// Run the alias or command
+await cli.runMatchedCommand();

src/client/content-scripts/custom-events.ts

@@ -15,10 +15,12 @@ export class WxtLocationChangeEvent extends Event {
  * Returns an event name unique to the extension and content script that's running.
  */
 export function getUniqueEventName(eventName: string): string {
-  // During the build process, __ENTRYPOINT__ is not defined when importing entrypoints to get their
-  // metadata.
+  // During the build process, import.meta.env is not defined when importing
+  // entrypoints to get their metadata.
   const entrypointName =
-    typeof __ENTRYPOINT__ === 'undefined' ? 'build' : __ENTRYPOINT__;
+    typeof import.meta.env === 'undefined'
+      ? 'build'
+      : import.meta.env.ENTRYPOINT;
 
   return `${browser.runtime.id}:${entrypointName}:${eventName}`;
 }

src/client/content-scripts/ui/index.ts

@@ -236,7 +236,9 @@ function mountUi(
  * Load the CSS for the current entrypoint.
  */
 async function loadCss(): Promise<string> {
-  const url = browser.runtime.getURL(`/content-scripts/${__ENTRYPOINT__}.css`);
+  const url = browser.runtime.getURL(
+    `/content-scripts/${import.meta.env.ENTRYPOINT}.css`,
+  );
   try {
     const res = await fetch(url);
     return await res.text();

src/core/builders/vite/index.ts

@@ -12,7 +12,7 @@ import {
 import * as wxtPlugins from './plugins';
 import { getEntrypointBundlePath } from '~/core/utils/entrypoints';
 
-export async function craeteViteBuilder(
+export async function createViteBuilder(
   inlineConfig: InlineConfig,
   userConfig: UserConfig,
   wxtConfig: Omit<InternalConfig, 'builder'>,
@@ -44,6 +44,10 @@ export async function craeteViteBuilder(
     if (config.build.minify == null && wxtConfig.command === 'serve') {
       config.build.minify = false;
     }
+    // Enable inline sourcemaps for the dev command (so content scripts have sourcemaps)
+    if (config.build.sourcemap == null && wxtConfig.command === 'serve') {
+      config.build.sourcemap = 'inline';
+    }
 
     config.plugins ??= [];
     config.plugins.push(
@@ -71,23 +75,7 @@ export async function craeteViteBuilder(
    * Return the basic config for building an entrypoint in [lib mode](https://vitejs.dev/guide/build.html#library-mode).
    */
   const getLibModeConfig = (entrypoint: Entrypoint): vite.InlineConfig => {
-    let virtualEntrypointType: VirtualEntrypointType | undefined;
-    switch (entrypoint.type) {
-      case 'background':
-      case 'unlisted-script':
-        virtualEntrypointType = entrypoint.type;
-        break;
-      case 'content-script':
-        virtualEntrypointType =
-          entrypoint.options.world === 'MAIN'
-            ? 'content-script-main-world'
-            : 'content-script-isolated-world';
-        break;
-    }
-    const entry = virtualEntrypointType
-      ? `virtual:wxt-${virtualEntrypointType}?${entrypoint.inputPath}`
-      : entrypoint.inputPath;
-
+    const entry = getRollupEntry(entrypoint);
     const plugins: NonNullable<vite.UserConfig['plugins']> = [
       wxtPlugins.entrypointGroupGlobals(entrypoint),
     ];
@@ -153,14 +141,16 @@ export async function craeteViteBuilder(
       build: {
         rollupOptions: {
           input: entrypoints.reduce<Record<string, string>>((input, entry) => {
-            input[entry.name] = entry.inputPath;
+            input[entry.name] = getRollupEntry(entry);
             return input;
           }, {}),
           output: {
             // Include a hash to prevent conflicts
             chunkFileNames: 'chunks/[name]-[hash].js',
-            // Include a hash to prevent conflicts
-            entryFileNames: 'chunks/[name]-[hash].js',
+            // Place JS entrypoints in main directory without a hash. (popup.html & popup.js are
+            // next to each other). The unique entrypoint name requirement prevents conflicts with
+            // scripts of the same name
+            entryFileNames: '[name].js',
             // We can't control the "name", so we need a hash to prevent conflicts
             assetFileNames: 'assets/[name]-[hash].[ext]',
           },
@@ -230,6 +220,9 @@ export async function craeteViteBuilder(
         async listen() {
           await viteServer.listen(info.port);
         },
+        async close() {
+          await viteServer.close();
+        },
         transformHtml(...args) {
           return viteServer.transformIndexHtml(...args);
         },
@@ -256,3 +249,26 @@ function getBuildOutputChunks(
   if (Array.isArray(result)) return result.flatMap(({ output }) => output);
   return result.output;
 }
+
+/**
+ * Returns the input module ID (virtual or real file) for an entrypoint. The returned string should
+ * be passed as an input to rollup.
+ */
+function getRollupEntry(entrypoint: Entrypoint): string {
+  let virtualEntrypointType: VirtualEntrypointType | undefined;
+  switch (entrypoint.type) {
+    case 'background':
+    case 'unlisted-script':
+      virtualEntrypointType = entrypoint.type;
+      break;
+    case 'content-script':
+      virtualEntrypointType =
+        entrypoint.options.world === 'MAIN'
+          ? 'content-script-main-world'
+          : 'content-script-isolated-world';
+      break;
+  }
+  return virtualEntrypointType
+    ? `virtual:wxt-${virtualEntrypointType}?${entrypoint.inputPath}`
+    : entrypoint.inputPath;
+}

src/core/builders/vite/plugins/__tests__/devHtmlPrerender.test.ts

@@ -0,0 +1,64 @@
+import { describe, expect, it } from 'vitest';
+import { Window } from 'happy-dom';
+import { pointToDevServer } from '../devHtmlPrerender';
+import {
+  fakeDevServer,
+  fakeInternalConfig,
+} from '~/core/utils/testing/fake-objects';
+import { normalizePath } from '~/core/utils/paths';
+import { resolve } from 'node:path';
+
+describe('Dev HTML Prerender Plugin', () => {
+  describe('pointToDevServer', () => {
+    it.each([
+      // File paths should be resolved
+      ['style.css', 'http://localhost:5173/entrypoints/popup/style.css'],
+      ['./style.css', 'http://localhost:5173/entrypoints/popup/style.css'],
+      ['../style.css', 'http://localhost:5173/entrypoints/style.css'],
+      ['~/assets/style.css', 'http://localhost:5173/assets/style.css'],
+      ['~~/assets/style.css', 'http://localhost:5173/assets/style.css'],
+      ['~local/style.css', 'http://localhost:5173/style.css'],
+      ['~absolute/style.css', 'http://localhost:5173/assets/style.css'],
+      ['~file', 'http://localhost:5173/example.css'],
+      // Absolute paths are loaded with the `/@fs/` base path
+      [
+        '~outside/test.css',
+        `http://localhost:5173/@fs${
+          process.platform === 'win32'
+            ? '/' + normalizePath(resolve('/some/non-root/test.css')) // "/D:/some/non-root/test.css"
+            : '/some/non-root/test.css'
+        }`,
+      ],
+      // URLs should not be changed
+      ['https://example.com/style.css', 'https://example.com/style.css'],
+    ])('should transform "%s" into "%s"', (input, expected) => {
+      const { document } = new Window({
+        url: 'http://localhost',
+      });
+      const root = '/some/root';
+      const config = fakeInternalConfig({
+        root,
+        alias: {
+          '~local': '.',
+          '~absolute': `${root}/assets`,
+          '~file': `${root}/example.css`,
+          '~outside': `${root}/../non-root`,
+          '~~': root,
+          '~': root,
+        },
+      });
+      const server = fakeDevServer({
+        hostname: 'localhost',
+        port: 5173,
+        origin: 'http://localhost:5173',
+      });
+      const id = root + '/entrypoints/popup/index.html';
+
+      document.head.innerHTML = `<link rel="stylesheet" href="${input}" />`;
+      pointToDevServer(config, server, id, document as any, 'link', 'href');
+
+      const actual = document.querySelector('link')!;
+      expect(actual.getAttribute('href')).toBe(expected);
+    });
+  });
+});

src/core/builders/vite/plugins/devHtmlPrerender.ts

@@ -1,8 +1,9 @@
 import type * as vite from 'vite';
-import { InternalConfig } from '~/types';
+import { InternalConfig, WxtDevServer } from '~/types';
 import { getEntrypointName } from '~/core/utils/entrypoints';
 import { parseHTML } from 'linkedom';
-import { dirname, isAbsolute, relative, resolve } from 'node:path';
+import { dirname, relative, resolve } from 'node:path';
+import { normalizePath } from '~/core/utils/paths';
 
 // Cache the preamble script for all devHtmlPrerender plugins, not just one
 let reactRefreshPreamble = '';
@@ -47,25 +48,10 @@ export function devHtmlPrerender(
 
         const { document } = parseHTML(code);
 
-        const pointToDevServer = (
-          querySelector: string,
-          attr: string,
-        ): void => {
-          document.querySelectorAll(querySelector).forEach((element) => {
-            const src = element.getAttribute(attr);
-            if (!src) return;
-
-            if (isAbsolute(src)) {
-              element.setAttribute(attr, server.origin + src);
-            } else if (src.startsWith('.')) {
-              const abs = resolve(dirname(id), src);
-              const pathname = relative(config.root, abs);
-              element.setAttribute(attr, `${server.origin}/${pathname}`);
-            }
-          });
-        };
-        pointToDevServer('script[type=module]', 'src');
-        pointToDevServer('link[rel=stylesheet]', 'href');
+        const _pointToDevServer = (querySelector: string, attr: string) =>
+          pointToDevServer(config, server, id, document, querySelector, attr);
+        _pointToDevServer('script[type=module]', 'src');
+        _pointToDevServer('link[rel=stylesheet]', 'href');
 
         // Add a script to add page reloading
         const reloader = document.createElement('script');
@@ -146,3 +132,63 @@ export function devHtmlPrerender(
     },
   ];
 }
+
+export function pointToDevServer(
+  config: Omit<InternalConfig, 'builder'>,
+  server: WxtDevServer,
+  id: string,
+  document: Document,
+  querySelector: string,
+  attr: string,
+) {
+  document.querySelectorAll(querySelector).forEach((element) => {
+    const src = element.getAttribute(attr);
+    if (!src || isUrl(src)) return;
+
+    let resolvedAbsolutePath: string | undefined;
+
+    // Check if src uses a project alias
+    const matchingAlias = Object.entries(config.alias).find(([key]) =>
+      src.startsWith(key),
+    );
+    if (matchingAlias) {
+      // Matches a import alias
+      const [alias, replacement] = matchingAlias;
+      resolvedAbsolutePath = resolve(
+        config.root,
+        src.replace(alias, replacement),
+      );
+    } else {
+      // Some file path relative to the HTML file
+      resolvedAbsolutePath = resolve(dirname(id), src);
+    }
+
+    // Apply the final file path
+    if (resolvedAbsolutePath) {
+      const relativePath = normalizePath(
+        relative(config.root, resolvedAbsolutePath),
+      );
+
+      if (relativePath.startsWith('.')) {
+        // Outside the config.root directory, serve the absolute path
+        let path = normalizePath(resolvedAbsolutePath);
+        // Add "/" to start of windows paths ("D:/some/path" -> "/D:/some/path")
+        if (!path.startsWith('/')) path = '/' + path;
+        element.setAttribute(attr, `${server.origin}/@fs${path}`);
+      } else {
+        // Inside the project, use relative path
+        const url = new URL(relativePath, server.origin);
+        element.setAttribute(attr, url.href);
+      }
+    }
+  });
+}
+
+function isUrl(str: string): boolean {
+  try {
+    new URL(str);
+    return true;
+  } catch {
+    return false;
+  }
+}

src/core/builders/vite/plugins/entrypointGroupGlobals.ts

@@ -14,7 +14,7 @@ export function entrypointGroupGlobals(
       const define: vite.InlineConfig['define'] = {};
       let name = Array.isArray(entrypointGroup) ? 'html' : entrypointGroup.name;
       for (const global of getEntrypointGlobals(name)) {
-        define[global.name] = JSON.stringify(global.value);
+        define[`import.meta.env.${global.name}`] = JSON.stringify(global.value);
       }
       return {
         define,

src/core/builders/vite/plugins/globals.ts

@@ -10,7 +10,7 @@ export function globals(
     config() {
       const define: vite.InlineConfig['define'] = {};
       for (const global of getGlobals(config)) {
-        define[global.name] = JSON.stringify(global.value);
+        define[`import.meta.env.${global.name}`] = JSON.stringify(global.value);
       }
       return {
         define,

src/core/builders/vite/plugins/unimport.ts

@@ -36,7 +36,11 @@ export function unimport(
       // Don't transform non-js files
       if (!ENABLED_EXTENSIONS.has(extname(id))) return;
 
-      return unimport.injectImports(code, id);
+      const injected = await unimport.injectImports(code, id);
+      return {
+        code: injected.code,
+        map: injected.s.generateMap({ hires: 'boundary', source: id }),
+      };
     },
   };
 }

src/core/create-server.ts

@@ -8,7 +8,6 @@ import {
 } from '~/types';
 import {
   getEntrypointBundlePath,
-  getEntrypointOutputFile,
   resolvePerBrowserOption,
 } from '~/core/utils/entrypoints';
 import {
@@ -20,6 +19,7 @@ import {
   getInternalConfig,
   detectDevChanges,
   rebuild,
+  findEntrypoints,
 } from '~/core/utils/building';
 import { createExtensionRunner } from '~/core/runners';
 import { consola } from 'consola';
@@ -48,22 +48,46 @@ export async function createServer(
     origin,
   };
 
+  const buildAndOpenBrowser = async () => {
+    // Build after starting the dev server so it can be used to transform HTML files
+    server.currentOutput = await internalBuild(config);
+
+    // Open browser after everything is ready to go.
+    await runner.openBrowser(config);
+  };
+
+  /**
+   * Stops the previous runner, grabs the latest config, and recreates the runner.
+   */
+  const closeAndRecreateRunner = async () => {
+    await runner.closeBrowser();
+    config = await getLatestConfig();
+    runner = await createExtensionRunner(config);
+  };
+
   // Server instance must be created first so its reference can be added to the internal config used
   // to pre-render entrypoints
   const server: WxtDevServer = {
     ...serverInfo,
-    watcher: undefined as any, // Filled out later down below
-    ws: undefined as any, // Filled out later down below
-    currentOutput: undefined as any, // Filled out later down below
+    get watcher() {
+      return builderServer.watcher;
+    },
+    get ws() {
+      return builderServer.ws;
+    },
+    currentOutput: undefined,
     async start() {
       await builderServer.listen();
       config.logger.success(`Started dev server @ ${serverInfo.origin}`);
-
-      // Build after starting the dev server so it can be used to transform HTML files
-      server.currentOutput = await internalBuild(config);
-
-      // Open browser after everything is ready to go.
-      await runner.openBrowser(config);
+      await buildAndOpenBrowser();
+    },
+    async stop() {
+      await runner.closeBrowser();
+      await builderServer.close();
+    },
+    async restart() {
+      await closeAndRecreateRunner();
+      await buildAndOpenBrowser();
     },
     transformHtml(url, html, originalUrl) {
       return builderServer.transformHtml(url, html, originalUrl);
@@ -77,23 +101,25 @@ export async function createServer(
     reloadExtension() {
       server.ws.send('wxt:reload-extension');
     },
+    async restartBrowser() {
+      await closeAndRecreateRunner();
+      await runner.openBrowser(config);
+    },
   };
 
   const getLatestConfig = () =>
     getInternalConfig(inlineConfig ?? {}, 'serve', server);
   let config = await getLatestConfig();
 
-  const [runner, builderServer] = await Promise.all([
+  let [runner, builderServer] = await Promise.all([
     createExtensionRunner(config),
     config.builder.createServer(server),
   ]);
 
-  server.watcher = builderServer.watcher;
-  server.ws = builderServer.ws;
-
   // Register content scripts for the first time after the background starts up since they're not
   // listed in the manifest
   server.ws.on('wxt:background-initialized', () => {
+    if (server.currentOutput == null) return;
     reloadContentScripts(server.currentOutput.steps, config, server);
   });
 
@@ -137,30 +163,44 @@ function createFileReloader(options: {
     changeQueue.push([event, path]);
 
     await fileChangedMutex.runExclusive(async () => {
-      const fileChanges = changeQueue.splice(0, changeQueue.length);
+      if (server.currentOutput == null) return;
+
+      const fileChanges = changeQueue
+        .splice(0, changeQueue.length)
+        .map(([_, file]) => file);
       if (fileChanges.length === 0) return;
 
-      const changes = detectDevChanges(fileChanges, server.currentOutput);
+      const changes = detectDevChanges(
+        config,
+        fileChanges,
+        server.currentOutput,
+      );
       if (changes.type === 'no-change') return;
 
+      if (changes.type === 'full-restart') {
+        config.logger.info('Config changed, restarting server...');
+        server.restart();
+        return;
+      }
+
+      if (changes.type === 'browser-restart') {
+        config.logger.info('Runner config changed, restarting browser...');
+        server.restartBrowser();
+        return;
+      }
+
       // Log the entrypoints that were effected
       config.logger.info(
-        `Changed: ${Array.from(new Set(fileChanges.map((change) => change[1])))
+        `Changed: ${Array.from(new Set(fileChanges))
           .map((file) => pc.dim(relative(config.root, file)))
           .join(', ')}`,
       );
-      const rebuiltNames = changes.rebuildGroups
-        .flat()
-        .map((entry) => {
-          return pc.cyan(
-            relative(config.outDir, getEntrypointOutputFile(entry, '')),
-          );
-        })
-        .join(pc.dim(', '));
 
       // Rebuild entrypoints on change
+      const allEntrypoints = await findEntrypoints(config);
       const { output: newOutput } = await rebuild(
         config,
+        allEntrypoints,
         // TODO: this excludes new entrypoints, so they're not built until the dev command is restarted
         changes.rebuildGroups,
         changes.cachedOutput,
@@ -171,15 +211,24 @@ function createFileReloader(options: {
       switch (changes.type) {
         case 'extension-reload':
           server.reloadExtension();
+          consola.success(`Reloaded extension`);
           break;
         case 'html-reload':
-          reloadHtmlPages(changes.rebuildGroups, server, config);
+          const { reloadedNames } = reloadHtmlPages(
+            changes.rebuildGroups,
+            server,
+            config,
+          );
+          consola.success(`Reloaded: ${getFilenameList(reloadedNames)}`);
           break;
         case 'content-script-reload':
           reloadContentScripts(changes.changedSteps, config, server);
+          const rebuiltNames = changes.rebuildGroups
+            .flat()
+            .map((entry) => entry.name);
+          consola.success(`Reloaded: ${getFilenameList(rebuiltNames)}`);
           break;
       }
-      consola.success(`Reloaded: ${rebuiltNames}`);
     });
   };
 }
@@ -194,6 +243,8 @@ function reloadContentScripts(
 ) {
   if (config.manifestVersion === 3) {
     steps.forEach((step) => {
+      if (server.currentOutput == null) return;
+
       const entry = step.entrypoints;
       if (Array.isArray(entry) || entry.type !== 'content-script') return;
 
@@ -227,9 +278,26 @@ function reloadHtmlPages(
   groups: EntrypointGroup[],
   server: WxtDevServer,
   config: InternalConfig,
-) {
-  groups.flat().forEach((entry) => {
+): { reloadedNames: string[] } {
+  // groups might contain other files like background/content scripts, and we only care about the HTMl pages
+  const htmlEntries = groups
+    .flat()
+    .filter((entry) => entry.inputPath.endsWith('.html'));
+
+  htmlEntries.forEach((entry) => {
     const path = getEntrypointBundlePath(entry, config.outDir, '.html');
     server.reloadPage(path);
   });
+
+  return {
+    reloadedNames: htmlEntries.map((entry) => entry.name),
+  };
+}
+
+function getFilenameList(names: string[]): string {
+  return names
+    .map((name) => {
+      return pc.cyan(name);
+    })
+    .join(pc.dim(', '));
 }

src/core/runners/web-ext.ts

@@ -1,5 +1,7 @@
 import type { WebExtRunInstance } from 'web-ext-run';
 import { ExtensionRunner } from '~/types';
+import { formatDuration } from '../utils/time';
+import defu from 'defu';
 
 /**
  * Create an `ExtensionRunner` backed by `web-ext`.
@@ -9,7 +11,7 @@ export function createWebExtRunner(): ExtensionRunner {
 
   return {
     async openBrowser(config) {
-      config.logger.info('Opening browser...');
+      const startTime = Date.now();
 
       if (config.browser === 'firefox' && config.manifestVersion === 3) {
         throw Error(
@@ -17,7 +19,7 @@ export function createWebExtRunner(): ExtensionRunner {
         );
       }
 
-      // Use the plugin's logger instead of web-ext's built-in one.
+      // Use WXT's logger instead of web-ext's built-in one.
       const webExtLogger = await import('web-ext-run/util/logger');
       webExtLogger.consoleStream.write = ({ level, msg, name }) => {
         if (level >= ERROR_LOG_LEVEL) config.logger.error(name, msg);
@@ -39,6 +41,10 @@ export function createWebExtRunner(): ExtensionRunner {
           : {
               chromiumBinary: wxtUserConfig?.binaries?.[config.browser],
               chromiumProfile: wxtUserConfig?.chromiumProfile,
+              chromiumPref: defu(
+                wxtUserConfig?.chromiumPref,
+                DEFAULT_CHROMIUM_PREFS,
+              ),
               args: wxtUserConfig?.chromiumArgs,
             }),
       };
@@ -61,7 +67,8 @@ export function createWebExtRunner(): ExtensionRunner {
       const webExt = await import('web-ext-run');
       runner = await webExt.default.cmd.run(finalConfig, options);
 
-      config.logger.success('Opened!');
+      const duration = Date.now() - startTime;
+      config.logger.success(`Opened browser in ${formatDuration(duration)}`);
     },
 
     async closeBrowser() {
@@ -73,3 +80,14 @@ export function createWebExtRunner(): ExtensionRunner {
 // https://github.com/mozilla/web-ext/blob/e37e60a2738478f512f1255c537133321f301771/src/util/logger.js#L12
 const WARN_LOG_LEVEL = 40;
 const ERROR_LOG_LEVEL = 50;
+
+const DEFAULT_CHROMIUM_PREFS = {
+  devtools: {
+    synced_preferences_sync_disabled: {
+      // Remove content scripts from sourcemap debugger ignore list so stack traces
+      // and log locations show up properly, see:
+      // https://github.com/wxt-dev/wxt/issues/236#issuecomment-1915364520
+      skipContentScripts: false,
+    },
+  },
+};

src/core/utils/__tests__/arrays.test.ts

@@ -1,5 +1,5 @@
 import { describe, it, expect } from 'vitest';
-import { every } from '~/core/utils/arrays';
+import { every, some } from '~/core/utils/arrays';
 
 describe('Array Utils', () => {
   describe('every', () => {
@@ -15,4 +15,20 @@ describe('Array Utils', () => {
       expect(every([1, 2, 1], (item) => item === 1)).toBe(false);
     });
   });
+
+  describe('some', () => {
+    it('should return true if one value returns true', () => {
+      const array = [1, 2, 3];
+      const predicate = (item: number) => item === 2;
+
+      expect(some(array, predicate)).toBe(true);
+    });
+
+    it('should return false if no values match', () => {
+      const array = [1, 2, 3];
+      const predicate = (item: number) => item === 4;
+
+      expect(some(array, predicate)).toBe(false);
+    });
+  });
 });

src/core/utils/__tests__/entrypoints.test.ts

@@ -47,6 +47,7 @@ describe('Entrypoint Utils', () => {
         name,
         outputDir,
         options: {},
+        skipped: false,
       };
 
       const actual = getEntrypointOutputFile(entrypoint, ext);

src/core/utils/__tests__/manifest.test.ts

@@ -6,6 +6,7 @@ import {
   fakeBuildOutput,
   fakeEntrypoint,
   fakeInternalConfig,
+  fakeManifestCommand,
   fakeOptionsEntrypoint,
   fakePopupEntrypoint,
 } from '../testing/fake-objects';
@@ -52,7 +53,11 @@ describe('Manifest Utils', () => {
           },
         };
 
-        const actual = await generateManifest([popup], buildOutput, config);
+        const { manifest: actual } = await generateManifest(
+          [popup],
+          buildOutput,
+          config,
+        );
 
         expect(actual).toMatchObject(expected);
       });
@@ -79,7 +84,11 @@ describe('Manifest Utils', () => {
             default_popup: 'popup.html',
           };
 
-          const actual = await generateManifest([popup], buildOutput, config);
+          const { manifest: actual } = await generateManifest(
+            [popup],
+            buildOutput,
+            config,
+          );
 
           expect(actual[expectedType]).toEqual(expected);
         },
@@ -102,7 +111,11 @@ describe('Manifest Utils', () => {
           action: config.manifest.action,
         };
 
-        const actual = await generateManifest([], buildOutput, config);
+        const { manifest: actual } = await generateManifest(
+          [],
+          buildOutput,
+          config,
+        );
 
         expect(actual).toMatchObject(expected);
       });
@@ -131,7 +144,11 @@ describe('Manifest Utils', () => {
           page: 'options.html',
         };
 
-        const actual = await generateManifest([options], buildOutput, config);
+        const { manifest: actual } = await generateManifest(
+          [options],
+          buildOutput,
+          config,
+        );
 
         expect(actual.options_ui).toEqual(expected);
       });
@@ -149,7 +166,11 @@ describe('Manifest Utils', () => {
           page: 'options.html',
         };
 
-        const actual = await generateManifest([options], buildOutput, config);
+        const { manifest: actual } = await generateManifest(
+          [options],
+          buildOutput,
+          config,
+        );
 
         expect(actual.options_ui).toEqual(expected);
       });
@@ -179,7 +200,7 @@ describe('Manifest Utils', () => {
               service_worker: 'background.js',
             };
 
-            const actual = await generateManifest(
+            const { manifest: actual } = await generateManifest(
               [background],
               buildOutput,
               config,
@@ -201,7 +222,7 @@ describe('Manifest Utils', () => {
             scripts: ['background.js'],
           };
 
-          const actual = await generateManifest(
+          const { manifest: actual } = await generateManifest(
             [background],
             buildOutput,
             config,
@@ -226,7 +247,7 @@ describe('Manifest Utils', () => {
               scripts: ['background.js'],
             };
 
-            const actual = await generateManifest(
+            const { manifest: actual } = await generateManifest(
               [background],
               buildOutput,
               config,
@@ -248,7 +269,7 @@ describe('Manifest Utils', () => {
             scripts: ['background.js'],
           };
 
-          const actual = await generateManifest(
+          const { manifest: actual } = await generateManifest(
             [background],
             buildOutput,
             config,
@@ -274,7 +295,11 @@ describe('Manifest Utils', () => {
         });
         const config = fakeInternalConfig();
 
-        const actual = await generateManifest(entrypoints, buildOutput, config);
+        const { manifest: actual } = await generateManifest(
+          entrypoints,
+          buildOutput,
+          config,
+        );
 
         expect(actual.icons).toEqual({
           16: 'icon-16.png',
@@ -296,7 +321,11 @@ describe('Manifest Utils', () => {
         });
         const config = fakeInternalConfig();
 
-        const actual = await generateManifest(entrypoints, buildOutput, config);
+        const { manifest: actual } = await generateManifest(
+          entrypoints,
+          buildOutput,
+          config,
+        );
 
         expect(actual.icons).toBeUndefined();
       });
@@ -323,7 +352,11 @@ describe('Manifest Utils', () => {
           },
         });
 
-        const actual = await generateManifest(entrypoints, buildOutput, config);
+        const { manifest: actual } = await generateManifest(
+          entrypoints,
+          buildOutput,
+          config,
+        );
 
         expect(actual.icons).toEqual(expected);
       });
@@ -339,6 +372,7 @@ describe('Manifest Utils', () => {
           options: {
             matches: ['*://google.com/*'],
           },
+          skipped: false,
         };
         const cs1Styles: OutputAsset = {
           type: 'asset',
@@ -353,6 +387,7 @@ describe('Manifest Utils', () => {
             matches: ['*://google.com/*'],
             runAt: 'document_end',
           },
+          skipped: false,
         };
         const cs2Styles: OutputAsset = {
           type: 'asset',
@@ -367,6 +402,7 @@ describe('Manifest Utils', () => {
             matches: ['*://google.com/*'],
             runAt: 'document_end',
           },
+          skipped: false,
         };
         const cs3Styles: OutputAsset = {
           type: 'asset',
@@ -381,6 +417,7 @@ describe('Manifest Utils', () => {
             matches: ['*://duckduckgo.com/*'],
             runAt: 'document_end',
           },
+          skipped: false,
         };
         const cs4Styles: OutputAsset = {
           type: 'asset',
@@ -395,6 +432,7 @@ describe('Manifest Utils', () => {
             matches: ['*://google.com/*'],
             world: 'MAIN',
           },
+          skipped: false,
         };
         const cs5Styles: OutputAsset = {
           type: 'asset',
@@ -418,7 +456,11 @@ describe('Manifest Utils', () => {
           ],
         };
 
-        const actual = await generateManifest(entrypoints, buildOutput, config);
+        const { manifest: actual } = await generateManifest(
+          entrypoints,
+          buildOutput,
+          config,
+        );
 
         expect(actual.content_scripts).toContainEqual({
           matches: ['*://google.com/*'],
@@ -454,6 +496,7 @@ describe('Manifest Utils', () => {
           options: {
             matches: ['*://google.com/*'],
           },
+          skipped: false,
         };
         const generatedContentScript = {
           matches: ['*://google.com/*'],
@@ -474,7 +517,11 @@ describe('Manifest Utils', () => {
           },
         });
 
-        const actual = await generateManifest(entrypoints, buildOutput, config);
+        const { manifest: actual } = await generateManifest(
+          entrypoints,
+          buildOutput,
+          config,
+        );
 
         expect(actual.content_scripts).toContainEqual(userContentScript);
         expect(actual.content_scripts).toContainEqual(generatedContentScript);
@@ -493,6 +540,7 @@ describe('Manifest Utils', () => {
                 matches: ['*://google.com/*'],
                 cssInjectionMode,
               },
+              skipped: false,
             };
             const styles: OutputAsset = {
               type: 'asset',
@@ -509,7 +557,7 @@ describe('Manifest Utils', () => {
               command: 'build',
             });
 
-            const actual = await generateManifest(
+            const { manifest: actual } = await generateManifest(
               entrypoints,
               buildOutput,
               config,
@@ -537,6 +585,7 @@ describe('Manifest Utils', () => {
                 matches: ['*://google.com/*'],
                 cssInjectionMode,
               },
+              skipped: false,
             };
             const styles: OutputAsset = {
               type: 'asset',
@@ -553,7 +602,7 @@ describe('Manifest Utils', () => {
               command: 'build',
             });
 
-            const actual = await generateManifest(
+            const { manifest: actual } = await generateManifest(
               entrypoints,
               buildOutput,
               config,
@@ -578,6 +627,7 @@ describe('Manifest Utils', () => {
               matches: ['*://google.com/*'],
               cssInjectionMode: 'ui',
             },
+            skipped: false,
           };
           const styles: OutputAsset = {
             type: 'asset',
@@ -595,7 +645,7 @@ describe('Manifest Utils', () => {
             manifestVersion: 3,
           });
 
-          const actual = await generateManifest(
+          const { manifest: actual } = await generateManifest(
             entrypoints,
             buildOutput,
             config,
@@ -619,6 +669,7 @@ describe('Manifest Utils', () => {
               matches: ['*://google.com/*'],
               cssInjectionMode: 'ui',
             },
+            skipped: false,
           };
           const styles: OutputAsset = {
             type: 'asset',
@@ -636,7 +687,7 @@ describe('Manifest Utils', () => {
             manifestVersion: 2,
           });
 
-          const actual = await generateManifest(
+          const { manifest: actual } = await generateManifest(
             entrypoints,
             buildOutput,
             config,
@@ -657,6 +708,7 @@ describe('Manifest Utils', () => {
               matches: ['*://play.google.com/books/*'],
               cssInjectionMode: 'ui',
             },
+            skipped: false,
           };
           const styles: OutputAsset = {
             type: 'asset',
@@ -674,7 +726,7 @@ describe('Manifest Utils', () => {
             manifestVersion: 3,
           });
 
-          const actual = await generateManifest(
+          const { manifest: actual } = await generateManifest(
             entrypoints,
             buildOutput,
             config,
@@ -701,6 +753,7 @@ describe('Manifest Utils', () => {
             matches: ['*://google.com/*'],
             cssInjectionMode: 'ui',
           },
+          skipped: false,
         };
         const styles: OutputAsset = {
           type: 'asset',
@@ -723,7 +776,11 @@ describe('Manifest Utils', () => {
           },
         });
 
-        const actual = await generateManifest(entrypoints, buildOutput, config);
+        const { manifest: actual } = await generateManifest(
+          entrypoints,
+          buildOutput,
+          config,
+        );
 
         expect(actual.web_accessible_resources).toEqual([
           { resources: ['one.png'], matches: ['*://one.com/*'] },
@@ -744,6 +801,7 @@ describe('Manifest Utils', () => {
             matches: ['*://google.com/*'],
             cssInjectionMode: 'ui',
           },
+          skipped: false,
         };
         const styles: OutputAsset = {
           type: 'asset',
@@ -764,7 +822,11 @@ describe('Manifest Utils', () => {
           },
         });
 
-        const actual = await generateManifest(entrypoints, buildOutput, config);
+        const { manifest: actual } = await generateManifest(
+          entrypoints,
+          buildOutput,
+          config,
+        );
 
         expect(actual.web_accessible_resources).toEqual([
           'one.png',
@@ -787,7 +849,11 @@ describe('Manifest Utils', () => {
           author: newAuthor,
         };
 
-        const actual = await generateManifest(entrypoints, buildOutput, config);
+        const { manifest: actual } = await generateManifest(
+          entrypoints,
+          buildOutput,
+          config,
+        );
 
         expect(actual).toMatchObject(expected);
       });
@@ -809,7 +875,7 @@ describe('Manifest Utils', () => {
             },
           });
 
-          const actual = await generateManifest(
+          const { manifest: actual } = await generateManifest(
             entrypoints,
             buildOutput,
             config,
@@ -835,7 +901,7 @@ describe('Manifest Utils', () => {
             },
           });
 
-          const actual = await generateManifest(
+          const { manifest: actual } = await generateManifest(
             entrypoints,
             buildOutput,
             config,
@@ -860,7 +926,7 @@ describe('Manifest Utils', () => {
             },
           });
 
-          const actual = await generateManifest(
+          const { manifest: actual } = await generateManifest(
             entrypoints,
             buildOutput,
             config,
@@ -881,7 +947,11 @@ describe('Manifest Utils', () => {
           },
         });
 
-        const actual = await generateManifest(entrypoints, buildOutput, config);
+        const { manifest: actual } = await generateManifest(
+          entrypoints,
+          buildOutput,
+          config,
+        );
 
         expect(actual.version).toBe('0.0.0');
         expect(actual.version_name).toBeUndefined();
@@ -895,6 +965,7 @@ describe('Manifest Utils', () => {
     describe('commands', () => {
       const reloadCommandName = 'wxt:reload-extension';
       const reloadCommand = {
+        description: expect.any(String),
         suggested_key: {
           default: 'Alt+R',
         },
@@ -905,21 +976,65 @@ describe('Manifest Utils', () => {
         const output = fakeBuildOutput();
         const entrypoints = fakeArray(fakeEntrypoint);
 
-        const actual = await generateManifest(entrypoints, output, config);
+        const { manifest: actual } = await generateManifest(
+          entrypoints,
+          output,
+          config,
+        );
 
-        expect(actual.commands).toMatchObject({
+        expect(actual.commands).toEqual({
           [reloadCommandName]: reloadCommand,
         });
       });
 
+      it('should customize the reload commands key binding if passing a custom command', async () => {
+        const config = fakeInternalConfig({
+          command: 'serve',
+          dev: {
+            reloadCommand: 'Ctrl+E',
+          },
+        });
+        const output = fakeBuildOutput();
+        const entrypoints = fakeArray(fakeEntrypoint);
+
+        const { manifest: actual } = await generateManifest(
+          entrypoints,
+          output,
+          config,
+        );
+
+        expect(actual.commands).toEqual({
+          [reloadCommandName]: {
+            ...reloadCommand,
+            suggested_key: {
+              default: 'Ctrl+E',
+            },
+          },
+        });
+      });
+
+      it("should not include the reload command when it's been disabled", async () => {
+        const config = fakeInternalConfig({
+          command: 'serve',
+          dev: {
+            reloadCommand: false,
+          },
+        });
+        const output = fakeBuildOutput();
+        const entrypoints = fakeArray(fakeEntrypoint);
+
+        const { manifest: actual } = await generateManifest(
+          entrypoints,
+          output,
+          config,
+        );
+
+        expect(actual.commands).toBeUndefined();
+      });
+
       it('should not override any existing commands when adding the one to reload the extension', async () => {
         const customCommandName = 'custom-command';
-        const customCommand = {
-          description: 'Some other command',
-          suggested_key: {
-            default: 'Ctrl+H',
-          },
-        };
+        const customCommand = fakeManifestCommand();
         const config = fakeInternalConfig({
           command: 'serve',
           manifest: {
@@ -931,20 +1046,52 @@ describe('Manifest Utils', () => {
         const output = fakeBuildOutput();
         const entrypoints = fakeArray(fakeEntrypoint);
 
-        const actual = await generateManifest(entrypoints, output, config);
+        const { manifest: actual } = await generateManifest(
+          entrypoints,
+          output,
+          config,
+        );
 
-        expect(actual.commands).toMatchObject({
+        expect(actual.commands).toEqual({
           [reloadCommandName]: reloadCommand,
           [customCommandName]: customCommand,
         });
       });
 
+      it('should not include the command if there are already 4 others (the max)', async () => {
+        const commands = {
+          command1: fakeManifestCommand(),
+          command2: fakeManifestCommand(),
+          command3: fakeManifestCommand(),
+          command4: fakeManifestCommand(),
+        };
+        const config = fakeInternalConfig({
+          command: 'serve',
+          manifest: { commands },
+        });
+        const output = fakeBuildOutput();
+        const entrypoints = fakeArray(fakeEntrypoint);
+
+        const { manifest: actual, warnings } = await generateManifest(
+          entrypoints,
+          output,
+          config,
+        );
+
+        expect(actual.commands).toEqual(commands);
+        expect(warnings).toHaveLength(1);
+      });
+
       it('should not include the command when building an extension', async () => {
         const config = fakeInternalConfig({ command: 'build' });
         const output = fakeBuildOutput();
         const entrypoints = fakeArray(fakeEntrypoint);
 
-        const actual = await generateManifest(entrypoints, output, config);
+        const { manifest: actual } = await generateManifest(
+          entrypoints,
+          output,
+          config,
+        );
 
         expect(actual.commands).toBeUndefined();
       });

src/core/utils/__tests__/test-entrypoints/imported-option.ts

@@ -0,0 +1,7 @@
+import { defineContentScript } from '~/sandbox';
+import { faker } from '@faker-js/faker';
+
+export default defineContentScript({
+  matches: [faker.string.nanoid()],
+  main() {},
+});

src/core/utils/__tests__/validation.test.ts

@@ -0,0 +1,100 @@
+import { describe, it, expect } from 'vitest';
+import {
+  fakeArray,
+  fakeContentScriptEntrypoint,
+  fakeEntrypoint,
+  fakeGenericEntrypoint,
+} from '../testing/fake-objects';
+import { validateEntrypoints } from '../validation';
+
+describe('Validation Utils', () => {
+  describe('validateEntrypoints', () => {
+    it('should return no errors when there are no errors', () => {
+      const entrypoints = fakeArray(fakeEntrypoint);
+      const expected = {
+        errors: [],
+        errorCount: 0,
+        warningCount: 0,
+      };
+
+      const actual = validateEntrypoints(entrypoints);
+
+      expect(actual).toEqual(expected);
+    });
+
+    it('should return an error when exclude is not an array', () => {
+      const entrypoint = fakeGenericEntrypoint({
+        options: {
+          // @ts-expect-error
+          exclude: 0,
+        },
+      });
+      const expected = {
+        errors: [
+          {
+            type: 'error',
+            message: '`exclude` must be an array of browser names',
+            value: 0,
+            entrypoint,
+          },
+        ],
+        errorCount: 1,
+        warningCount: 0,
+      };
+
+      const actual = validateEntrypoints([entrypoint]);
+
+      expect(actual).toEqual(expected);
+    });
+
+    it('should return an error when include is not an array', () => {
+      const entrypoint = fakeGenericEntrypoint({
+        options: {
+          // @ts-expect-error
+          include: 0,
+        },
+      });
+      const expected = {
+        errors: [
+          {
+            type: 'error',
+            message: '`include` must be an array of browser names',
+            value: 0,
+            entrypoint,
+          },
+        ],
+        errorCount: 1,
+        warningCount: 0,
+      };
+
+      const actual = validateEntrypoints([entrypoint]);
+
+      expect(actual).toEqual(expected);
+    });
+
+    it("should return an error when content scripts don't have a matches", () => {
+      const entrypoint = fakeContentScriptEntrypoint({
+        options: {
+          // @ts-expect-error
+          matches: null,
+        },
+      });
+      const expected = {
+        errors: [
+          {
+            type: 'error',
+            message: '`matches` is required',
+            value: null,
+            entrypoint,
+          },
+        ],
+        errorCount: 1,
+        warningCount: 0,
+      };
+
+      const actual = validateEntrypoints([entrypoint]);
+
+      expect(actual).toEqual(expected);
+    });
+  });
+});

src/core/utils/arrays.ts

@@ -9,3 +9,15 @@ export function every<T>(
     if (!predicate(array[i], i)) return false;
   return true;
 }
+
+/**
+ * Returns true when any of the predicates return true;
+ */
+export function some<T>(
+  array: T[],
+  predicate: (item: T, index: number) => boolean,
+): boolean {
+  for (let i = 0; i < array.length; i++)
+    if (predicate(array[i], i)) return true;
+  return false;
+}

src/core/utils/building/__tests__/detect-dev-changes.test.ts

@@ -10,22 +10,15 @@ import {
   fakePopupEntrypoint,
   fakeOutputAsset,
   fakeOutputChunk,
+  fakeInternalConfig,
 } from '~/core/utils/testing/fake-objects';
 import { BuildOutput, BuildStepOutput } from '~/types';
 
 describe('Detect Dev Changes', () => {
   describe('No changes', () => {
-    it("should return 'no-change' when a build hasn't finished", () => {
-      const actual = detectDevChanges(
-        [['unknown', '/path/to/file.ts']],
-        undefined,
-      );
-
-      expect(actual).toEqual({ type: 'no-change' });
-    });
-
     it("should return 'no-change' when the changed file isn't used by any of the entrypoints", () => {
-      const change: [string, string] = ['unknown', '/some/path.ts'];
+      const config = fakeInternalConfig();
+      const changes = ['/some/path.ts'];
       const currentOutput: BuildOutput = {
         manifest: fakeManifest(),
         publicAssets: [],
@@ -41,18 +34,64 @@ describe('Detect Dev Changes', () => {
         ],
       };
 
-      const actual = detectDevChanges([change], currentOutput);
+      const actual = detectDevChanges(config, changes, currentOutput);
 
       expect(actual).toEqual({ type: 'no-change' });
     });
   });
 
+  describe('wxt.config.ts', () => {
+    it("should return 'full-restart' when one of the changed files is the config file", () => {
+      const configFile = '/root/wxt.config.ts';
+      const config = fakeInternalConfig({
+        userConfigMetadata: {
+          configFile,
+        },
+      });
+      const changes = ['/root/src/public/image.svg', configFile];
+      const currentOutput: BuildOutput = {
+        manifest: fakeManifest(),
+        publicAssets: [],
+        steps: [],
+      };
+      const expected: DevModeChange = {
+        type: 'full-restart',
+      };
+
+      const actual = detectDevChanges(config, changes, currentOutput);
+
+      expect(actual).toEqual(expected);
+    });
+  });
+
+  describe('web-ext.config.ts', () => {
+    it("should return 'browser-restart' when one of the changed files is the config file", () => {
+      const runnerFile = '/root/web-ext.config.ts';
+      const config = fakeInternalConfig({
+        runnerConfig: {
+          configFile: runnerFile,
+        },
+      });
+      const changes = ['/root/src/public/image.svg', runnerFile];
+      const currentOutput: BuildOutput = {
+        manifest: fakeManifest(),
+        publicAssets: [],
+        steps: [],
+      };
+      const expected: DevModeChange = {
+        type: 'browser-restart',
+      };
+
+      const actual = detectDevChanges(config, changes, currentOutput);
+
+      expect(actual).toEqual(expected);
+    });
+  });
+
   describe('Public Assets', () => {
     it("should return 'extension-reload' without any groups to rebuild when the changed file is a public asset", () => {
-      const change: [string, string] = [
-        'unknown',
-        '/root/src/public/image.svg',
-      ];
+      const config = fakeInternalConfig();
+      const changes = ['/root/src/public/image.svg'];
       const asset1 = fakeOutputAsset({
         fileName: 'image.svg',
       });
@@ -73,7 +112,7 @@ describe('Detect Dev Changes', () => {
         },
       };
 
-      const actual = detectDevChanges([change], currentOutput);
+      const actual = detectDevChanges(config, changes, currentOutput);
 
       expect(actual).toEqual(expected);
     });
@@ -81,6 +120,7 @@ describe('Detect Dev Changes', () => {
 
   describe('Background', () => {
     it("should rebuild the background and reload the extension when the changed file in it's chunks' `moduleIds` field", () => {
+      const config = fakeInternalConfig();
       const changedPath = '/root/utils/shared.ts';
       const contentScript = fakeContentScriptEntrypoint({
         inputPath: '/root/overlay.content.ts',
@@ -120,18 +160,16 @@ describe('Detect Dev Changes', () => {
         rebuildGroups: [background],
       };
 
-      const actual = detectDevChanges(
-        [['unknown', changedPath]],
-        currentOutput,
-      );
+      const actual = detectDevChanges(config, [changedPath], currentOutput);
 
       expect(actual).toEqual(expected);
     });
   });
 
   describe('HTML Pages', () => {
-    it('should rebuild then reload only the effected pages', async () => {
-      const changedPath = '/root/page1/index.html';
+    it('should detect changes to entrypoints/<name>.html files', async () => {
+      const config = fakeInternalConfig();
+      const changedPath = '/root/page1.html';
       const htmlPage1 = fakePopupEntrypoint({
         inputPath: changedPath,
       });
@@ -146,16 +184,16 @@ describe('Detect Dev Changes', () => {
       const step1: BuildStepOutput = {
         entrypoints: [htmlPage1, htmlPage2],
         chunks: [
-          fakeOutputChunk({
-            moduleIds: [fakeFile(), changedPath],
+          fakeOutputAsset({
+            fileName: 'page1.html',
           }),
         ],
       };
       const step2: BuildStepOutput = {
         entrypoints: [htmlPage3],
         chunks: [
-          fakeOutputChunk({
-            moduleIds: [fakeFile(), fakeFile(), fakeFile()],
+          fakeOutputAsset({
+            fileName: 'page2.html',
           }),
         ],
       };
@@ -174,10 +212,57 @@ describe('Detect Dev Changes', () => {
         rebuildGroups: [[htmlPage1, htmlPage2]],
       };
 
-      const actual = detectDevChanges(
-        [['unknown', changedPath]],
-        currentOutput,
-      );
+      const actual = detectDevChanges(config, [changedPath], currentOutput);
+
+      expect(actual).toEqual(expected);
+    });
+
+    it('should detect changes to entrypoints/<name>/index.html files', async () => {
+      const config = fakeInternalConfig();
+      const changedPath = '/root/page1/index.html';
+      const htmlPage1 = fakePopupEntrypoint({
+        inputPath: changedPath,
+      });
+      const htmlPage2 = fakeOptionsEntrypoint({
+        inputPath: '/root/page2/index.html',
+      });
+      const htmlPage3 = fakeGenericEntrypoint({
+        type: 'sandbox',
+        inputPath: '/root/page3/index.html',
+      });
+
+      const step1: BuildStepOutput = {
+        entrypoints: [htmlPage1, htmlPage2],
+        chunks: [
+          fakeOutputAsset({
+            fileName: 'page1.html',
+          }),
+        ],
+      };
+      const step2: BuildStepOutput = {
+        entrypoints: [htmlPage3],
+        chunks: [
+          fakeOutputAsset({
+            fileName: 'page2.html',
+          }),
+        ],
+      };
+
+      const currentOutput: BuildOutput = {
+        manifest: fakeManifest(),
+        publicAssets: [],
+        steps: [step1, step2],
+      };
+      const expected: DevModeChange = {
+        type: 'html-reload',
+        cachedOutput: {
+          ...currentOutput,
+          steps: [step2],
+        },
+        rebuildGroups: [[htmlPage1, htmlPage2]],
+      };
+
+      const actual = detectDevChanges(config, [changedPath], currentOutput);
 
       expect(actual).toEqual(expected);
     });
@@ -185,6 +270,7 @@ describe('Detect Dev Changes', () => {
 
   describe('Content Scripts', () => {
     it('should rebuild then reload only the effected content scripts', async () => {
+      const config = fakeInternalConfig();
       const changedPath = '/root/utils/shared.ts';
       const script1 = fakeContentScriptEntrypoint({
         inputPath: '/root/overlay1.content/index.ts',
@@ -236,10 +322,7 @@ describe('Detect Dev Changes', () => {
         rebuildGroups: [script1, script3],
       };
 
-      const actual = detectDevChanges(
-        [['unknown', changedPath]],
-        currentOutput,
-      );
+      const actual = detectDevChanges(config, [changedPath], currentOutput);
 
       expect(actual).toEqual(expected);
     });

src/core/utils/building/__tests__/find-entrypoints.test.ts

@@ -27,6 +27,7 @@ const readFileMock = vi.mocked(
 
 describe('findEntrypoints', () => {
   const config = fakeInternalConfig({
+    manifestVersion: 3,
     root: '/',
     entrypointsDir: resolve('/src/entrypoints'),
     outDir: resolve('.output'),
@@ -53,6 +54,7 @@ describe('findEntrypoints', () => {
           defaultIcon: { '16': '/icon/16.png' },
           defaultTitle: 'Default Title',
         },
+        skipped: false,
       },
     ],
     [
@@ -72,6 +74,7 @@ describe('findEntrypoints', () => {
         options: {
           defaultTitle: 'Title',
         },
+        skipped: false,
       },
     ],
   ])(
@@ -103,6 +106,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'options.html'),
         outputDir: config.outDir,
         options: {},
+        skipped: false,
       },
     ],
     [
@@ -123,6 +127,7 @@ describe('findEntrypoints', () => {
         options: {
           openInTab: true,
         },
+        skipped: false,
       },
     ],
   ])(
@@ -146,6 +151,7 @@ describe('findEntrypoints', () => {
         name: 'content',
         inputPath: resolve(config.entrypointsDir, 'content.ts'),
         outputDir: resolve(config.outDir, 'content-scripts'),
+        skipped: false,
       },
     ],
     [
@@ -155,6 +161,7 @@ describe('findEntrypoints', () => {
         name: 'overlay',
         inputPath: resolve(config.entrypointsDir, 'overlay.content.ts'),
         outputDir: resolve(config.outDir, 'content-scripts'),
+        skipped: false,
       },
     ],
     [
@@ -164,6 +171,7 @@ describe('findEntrypoints', () => {
         name: 'content',
         inputPath: resolve(config.entrypointsDir, 'content/index.ts'),
         outputDir: resolve(config.outDir, 'content-scripts'),
+        skipped: false,
       },
     ],
     [
@@ -173,6 +181,7 @@ describe('findEntrypoints', () => {
         name: 'overlay',
         inputPath: resolve(config.entrypointsDir, 'overlay.content/index.ts'),
         outputDir: resolve(config.outDir, 'content-scripts'),
+        skipped: false,
       },
     ],
     [
@@ -182,6 +191,7 @@ describe('findEntrypoints', () => {
         name: 'overlay',
         inputPath: resolve(config.entrypointsDir, 'overlay.content.tsx'),
         outputDir: resolve(config.outDir, 'content-scripts'),
+        skipped: false,
       },
     ],
   ])(
@@ -212,6 +222,7 @@ describe('findEntrypoints', () => {
         name: 'background',
         inputPath: resolve(config.entrypointsDir, 'background.ts'),
         outputDir: config.outDir,
+        skipped: false,
       },
     ],
     [
@@ -221,6 +232,7 @@ describe('findEntrypoints', () => {
         name: 'background',
         inputPath: resolve(config.entrypointsDir, 'background/index.ts'),
         outputDir: config.outDir,
+        skipped: false,
       },
     ],
   ])(
@@ -243,6 +255,32 @@ describe('findEntrypoints', () => {
     },
   );
 
+  it('should remove type=module from MV2 background scripts', async () => {
+    const config = fakeInternalConfig({ manifestVersion: 2 });
+    const options: BackgroundEntrypoint['options'] = {
+      type: 'module',
+    };
+    globMock.mockResolvedValueOnce(['background.ts']);
+    importEntrypointFileMock.mockResolvedValue(options);
+
+    const entrypoints = await findEntrypoints(config);
+
+    expect(entrypoints[0].options).toEqual({});
+  });
+
+  it('should allow type=module for MV3 background service workers', async () => {
+    const config = fakeInternalConfig({ manifestVersion: 3 });
+    const options: BackgroundEntrypoint['options'] = {
+      type: 'module',
+    };
+    globMock.mockResolvedValueOnce(['background.ts']);
+    importEntrypointFileMock.mockResolvedValue(options);
+
+    const entrypoints = await findEntrypoints(config);
+
+    expect(entrypoints[0].options).toEqual(options);
+  });
+
   it("should include a virtual background script so dev reloading works when there isn't a background entrypoint defined by the user", async () => {
     globMock.mockResolvedValueOnce(['popup.html']);
 
@@ -258,6 +296,7 @@ describe('findEntrypoints', () => {
       name: 'background',
       options: {},
       outputDir: config.outDir,
+      skipped: false,
     });
   });
 
@@ -278,6 +317,7 @@ describe('findEntrypoints', () => {
         name: 'injected',
         inputPath: resolve(config.entrypointsDir, path),
         outputDir: config.outDir,
+        skipped: false,
       };
       const options: GenericEntrypoint['options'] = {};
       globMock.mockResolvedValueOnce([path]);
@@ -304,6 +344,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'sandbox.html'),
         outputDir: config.outDir,
         options: {},
+        skipped: false,
       },
     ],
     [
@@ -314,6 +355,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'sandbox/index.html'),
         outputDir: config.outDir,
         options: {},
+        skipped: false,
       },
     ],
     [
@@ -324,6 +366,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'named.sandbox.html'),
         outputDir: config.outDir,
         options: {},
+        skipped: false,
       },
     ],
     [
@@ -334,6 +377,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'named.sandbox/index.html'),
         outputDir: config.outDir,
         options: {},
+        skipped: false,
       },
     ],
 
@@ -346,6 +390,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'bookmarks.html'),
         outputDir: config.outDir,
         options: {},
+        skipped: false,
       },
     ],
     [
@@ -356,6 +401,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'bookmarks/index.html'),
         outputDir: config.outDir,
         options: {},
+        skipped: false,
       },
     ],
 
@@ -368,6 +414,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'history.html'),
         outputDir: config.outDir,
         options: {},
+        skipped: false,
       },
     ],
     [
@@ -378,6 +425,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'history/index.html'),
         outputDir: config.outDir,
         options: {},
+        skipped: false,
       },
     ],
 
@@ -390,6 +438,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'newtab.html'),
         outputDir: config.outDir,
         options: {},
+        skipped: false,
       },
     ],
     [
@@ -400,6 +449,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'newtab/index.html'),
         outputDir: config.outDir,
         options: {},
+        skipped: false,
       },
     ],
 
@@ -412,6 +462,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'sidepanel.html'),
         outputDir: config.outDir,
         options: {},
+        skipped: false,
       },
     ],
     [
@@ -422,6 +473,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'sidepanel/index.html'),
         outputDir: config.outDir,
         options: {},
+        skipped: false,
       },
     ],
     [
@@ -432,6 +484,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'named.sidepanel.html'),
         outputDir: config.outDir,
         options: {},
+        skipped: false,
       },
     ],
     [
@@ -442,6 +495,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'named.sidepanel/index.html'),
         outputDir: config.outDir,
         options: {},
+        skipped: false,
       },
     ],
 
@@ -454,6 +508,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'devtools.html'),
         outputDir: config.outDir,
         options: {},
+        skipped: false,
       },
     ],
     [
@@ -464,6 +519,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'devtools/index.html'),
         outputDir: config.outDir,
         options: {},
+        skipped: false,
       },
     ],
 
@@ -476,6 +532,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'onboarding.html'),
         outputDir: config.outDir,
         options: {},
+        skipped: false,
       },
     ],
     [
@@ -486,6 +543,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'onboarding/index.html'),
         outputDir: config.outDir,
         options: {},
+        skipped: false,
       },
     ],
 
@@ -498,6 +556,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'iframe.scss'),
         outputDir: config.outDir,
         options: {},
+        skipped: false,
       },
     ],
     [
@@ -508,6 +567,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'iframe.css'),
         outputDir: config.outDir,
         options: {},
+        skipped: false,
       },
     ],
 
@@ -520,6 +580,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'content.css'),
         outputDir: resolve(config.outDir, 'content-scripts'),
         options: {},
+        skipped: false,
       },
     ],
     [
@@ -530,6 +591,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'overlay.content.css'),
         outputDir: resolve(config.outDir, 'content-scripts'),
         options: {},
+        skipped: false,
       },
     ],
     [
@@ -540,6 +602,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'content/index.css'),
         outputDir: resolve(config.outDir, 'content-scripts'),
         options: {},
+        skipped: false,
       },
     ],
     [
@@ -550,6 +613,7 @@ describe('findEntrypoints', () => {
         inputPath: resolve(config.entrypointsDir, 'overlay.content/index.css'),
         outputDir: resolve(config.outDir, 'content-scripts'),
         options: {},
+        skipped: false,
       },
     ],
   ])('should find entrypoint for %s', async (path, expected) => {
@@ -737,4 +801,29 @@ describe('findEntrypoints', () => {
       expect(entrypoints).toEqual([]);
     });
   });
+
+  describe('filterEntrypoints option', () => {
+    it('should control entrypoints accessible', async () => {
+      globMock.mockResolvedValue([
+        'options/index.html',
+        'popup/index.html',
+        'ui.content/index.ts',
+        'injected.content/index.ts',
+      ]);
+      importEntrypointFileMock.mockResolvedValue({});
+      const filterEntrypoints = ['popup', 'ui'];
+      const config = fakeInternalConfig({
+        root: '/',
+        entrypointsDir: resolve('/src/entrypoints'),
+        outDir: resolve('.output'),
+        command: 'build',
+        filterEntrypoints: new Set(filterEntrypoints),
+      });
+
+      const entrypoints = await findEntrypoints(config);
+      const names = entrypoints.map((item) => item.name);
+      expect(names).toHaveLength(2);
+      expect(names).toEqual(filterEntrypoints);
+    });
+  });
 });

src/core/utils/building/__tests__/group-entrypoints.test.ts

@@ -1,6 +1,11 @@
 import { describe, expect, it } from 'vitest';
 import { Entrypoint } from '~/types';
 import { groupEntrypoints } from '../group-entrypoints';
+import {
+  fakeBackgroundEntrypoint,
+  fakeGenericEntrypoint,
+  fakePopupEntrypoint,
+} from '../../testing/fake-objects';
 
 const background: Entrypoint = {
   type: 'background',
@@ -8,6 +13,7 @@ const background: Entrypoint = {
   inputPath: '/background.ts',
   outputDir: '/.output/background',
   options: {},
+  skipped: false,
 };
 const contentScript: Entrypoint = {
   type: 'content-script',
@@ -17,6 +23,7 @@ const contentScript: Entrypoint = {
   options: {
     matches: ['<all_urls>'],
   },
+  skipped: false,
 };
 const unlistedScript: Entrypoint = {
   type: 'unlisted-script',
@@ -24,6 +31,7 @@ const unlistedScript: Entrypoint = {
   inputPath: '/injected.ts',
   outputDir: '/.output/injected',
   options: {},
+  skipped: false,
 };
 const popup: Entrypoint = {
   type: 'popup',
@@ -31,6 +39,7 @@ const popup: Entrypoint = {
   inputPath: '/popup.html',
   outputDir: '/.output/popup',
   options: {},
+  skipped: false,
 };
 const unlistedPage: Entrypoint = {
   type: 'unlisted-page',
@@ -38,6 +47,7 @@ const unlistedPage: Entrypoint = {
   inputPath: '/onboarding.html',
   outputDir: '/.output/onboarding',
   options: {},
+  skipped: false,
 };
 const options: Entrypoint = {
   type: 'options',
@@ -45,6 +55,7 @@ const options: Entrypoint = {
   inputPath: '/options.html',
   outputDir: '/.output/options',
   options: {},
+  skipped: false,
 };
 const sandbox1: Entrypoint = {
   type: 'sandbox',
@@ -52,6 +63,7 @@ const sandbox1: Entrypoint = {
   inputPath: '/sandbox1.html',
   outputDir: '/.output/sandbox1',
   options: {},
+  skipped: false,
 };
 const sandbox2: Entrypoint = {
   type: 'sandbox',
@@ -59,6 +71,7 @@ const sandbox2: Entrypoint = {
   inputPath: '/sandbox2.html',
   outputDir: '/.output/sandbox2',
   options: {},
+  skipped: false,
 };
 const unlistedStyle: Entrypoint = {
   type: 'unlisted-style',
@@ -66,6 +79,7 @@ const unlistedStyle: Entrypoint = {
   inputPath: '/injected.scss',
   outputDir: '/.output',
   options: {},
+  skipped: false,
 };
 const contentScriptStyle: Entrypoint = {
   type: 'content-script-style',
@@ -73,6 +87,7 @@ const contentScriptStyle: Entrypoint = {
   inputPath: '/overlay.content.scss',
   outputDir: '/.output/content-scripts',
   options: {},
+  skipped: false,
 };
 
 describe('groupEntrypoints', () => {
@@ -131,4 +146,29 @@ describe('groupEntrypoints', () => {
 
     expect(actual).toEqual(expected);
   });
+
+  it('should group ESM compatible scripts with extension pages', () => {
+    const background = fakeBackgroundEntrypoint({
+      options: {
+        type: 'module',
+      },
+    });
+    const popup = fakePopupEntrypoint();
+    const sandbox = fakeGenericEntrypoint({
+      inputPath: '/entrypoints/sandbox.html',
+      name: 'sandbox',
+      type: 'sandbox',
+    });
+
+    const actual = groupEntrypoints([background, popup, sandbox]);
+
+    expect(actual).toEqual([[background, popup], [sandbox]]);
+  });
+
+  it.todo(
+    'should group ESM compatible sandbox scripts with sandbox pages',
+    () => {
+      // Main world content scripts
+    },
+  );
 });

src/core/utils/building/__tests__/import-entrypoint.test.ts

@@ -2,6 +2,7 @@ import { describe, expect, it } from 'vitest';
 import { importEntrypointFile } from '~/core/utils/building';
 import { fakeInternalConfig } from '~/core/utils/testing/fake-objects';
 import { resolve } from 'node:path';
+import { unnormalizePath } from '../../paths';
 
 const entrypointPath = (filename: string) =>
   resolve('src/core/utils/__tests__/test-entrypoints', filename);
@@ -38,4 +39,15 @@ describe('importEntrypointFile', () => {
 
     expect(actual).toBeUndefined();
   });
+
+  it('should throw a custom error message when an imported variable is used before main', async () => {
+    const filePath = unnormalizePath(
+      '../src/core/utils/__tests__/test-entrypoints/imported-option.ts',
+    );
+    await expect(() =>
+      importEntrypointFile(entrypointPath('imported-option.ts'), config),
+    ).rejects.toThrowErrorMatchingInlineSnapshot(
+      `[Error: ${filePath}: Cannot use imported variable "faker" outside the main function. See https://wxt.dev/guide/entrypoints.html#side-effects]`,
+    );
+  });
 });

src/core/utils/building/build-entrypoints.ts

@@ -18,12 +18,15 @@ export async function buildEntrypoints(
   const steps: BuildStepOutput[] = [];
   for (let i = 0; i < groups.length; i++) {
     const group = groups[i];
-    const groupNames = [group]
-      .flat()
-      .map((e) => e.name)
-      .join(pc.dim(', '));
-    spinner.text = pc.dim(`[${i + 1}/${groups.length}]`) + ` ${groupNames}`;
-    steps.push(await config.builder.build(group));
+    const groupNames = [group].flat().map((e) => e.name);
+    const groupNameColored = groupNames.join(pc.dim(', '));
+    spinner.text =
+      pc.dim(`[${i + 1}/${groups.length}]`) + ` ${groupNameColored}`;
+    try {
+      steps.push(await config.builder.build(group));
+    } catch (err) {
+      throw Error(`Failed to build ${groupNames.join(', ')}`, { cause: err });
+    }
   }
   const publicAssets = await copyPublicDirectory(config);
 

src/core/utils/building/detect-dev-changes.ts

@@ -2,10 +2,11 @@ import {
   BuildOutput,
   BuildStepOutput,
   EntrypointGroup,
+  InternalConfig,
   OutputAsset,
   OutputFile,
 } from '~/types';
-import { every } from '~/core/utils/arrays';
+import { every, some } from '~/core/utils/arrays';
 import { normalizePath } from '~/core/utils/paths';
 
 /**
@@ -29,10 +30,21 @@ import { normalizePath } from '~/core/utils/paths';
  *   - Config file changed (wxt.config.ts, .env, web-ext.config.ts, etc)
  */
 export function detectDevChanges(
-  changedFiles: [event: string, path: string][],
-  currentOutput: BuildOutput | undefined,
+  config: InternalConfig,
+  changedFiles: string[],
+  currentOutput: BuildOutput,
 ): DevModeChange {
-  if (currentOutput == null) return { type: 'no-change' };
+  const isConfigChange = some(
+    changedFiles,
+    (file) => file === config.userConfigMetadata.configFile,
+  );
+  if (isConfigChange) return { type: 'full-restart' };
+
+  const isRunnerChange = some(
+    changedFiles,
+    (file) => file === config.runnerConfig.configFile,
+  );
+  if (isRunnerChange) return { type: 'browser-restart' };
 
   const changedSteps = new Set(
     changedFiles.flatMap((changedFile) =>
@@ -69,7 +81,7 @@ export function detectDevChanges(
 
   const isOnlyHtmlChanges =
     changedFiles.length > 0 &&
-    every(changedFiles, ([_, file]) => file.endsWith('.html'));
+    every(changedFiles, (file) => file.endsWith('.html'));
   if (isOnlyHtmlChanges) {
     return {
       type: 'html-reload',
@@ -104,18 +116,19 @@ export function detectDevChanges(
  * For a single change, return all the step of the build output that were effected by it.
  */
 function findEffectedSteps(
-  changedFile: [event: string, path: string],
+  changedFile: string,
   currentOutput: BuildOutput,
 ): DetectedChange[] {
   const changes: DetectedChange[] = [];
-  const changedPath = normalizePath(changedFile[1]);
+  const changedPath = normalizePath(changedFile);
 
   const isChunkEffected = (chunk: OutputFile): boolean =>
-    // If it's an HTML file with the same path, is is effected because HTML files need to be pre-rendered
-    // fileName is normalized, relative bundle path
-    (chunk.type === 'asset' && changedPath.endsWith(chunk.fileName)) ||
+    // If it's an HTML file with the same path, is is effected because HTML files need to be re-rendered
+    // - fileName is normalized, relative bundle path, "<entrypoint-name>.html"
+    (chunk.type === 'asset' &&
+      changedPath.replace('/index.html', '.html').endsWith(chunk.fileName)) ||
     // If it's a chunk that depends on the changed file, it is effected
-    // moduleIds are absolute, normalized paths
+    // - moduleIds are absolute, normalized paths
     (chunk.type === 'chunk' && chunk.moduleIds.includes(changedPath));
 
   for (const step of currentOutput.steps) {
@@ -139,8 +152,9 @@ export type DevModeChange =
   | NoChange
   | HtmlReload
   | ExtensionReload
-  | ContentScriptReload;
-// | BrowserRestart
+  | ContentScriptReload
+  | FullRestart
+  | BrowserRestart;
 
 interface NoChange {
   type: 'no-change';
@@ -157,6 +171,14 @@ interface RebuildChange {
   cachedOutput: BuildOutput;
 }
 
+interface FullRestart {
+  type: 'full-restart';
+}
+
+interface BrowserRestart {
+  type: 'browser-restart';
+}
+
 interface HtmlReload extends RebuildChange {
   type: 'html-reload';
 }

src/core/utils/building/find-entrypoints.ts

@@ -24,6 +24,7 @@ import {
 } from '~/core/utils/entrypoints';
 import { VIRTUAL_NOOP_BACKGROUND_MODULE_ID } from '~/core/utils/constants';
 import { CSS_EXTENSIONS_PATTERN } from '~/core/utils/paths';
+import pc from 'picocolors';
 
 /**
  * Return entrypoints and their configuration by looking through the project's files.
@@ -48,7 +49,14 @@ export async function findEntrypoints(
     );
     if (matchingGlob) {
       const type = PATH_GLOB_TO_TYPE_MAP[matchingGlob];
-      results.push({ name, inputPath, type });
+      results.push({
+        name,
+        inputPath,
+        type,
+        skipped:
+          config.filterEntrypoints != null &&
+          !config.filterEntrypoints.has(name),
+      });
     }
     return results;
   }, []);
@@ -106,11 +114,22 @@ export async function findEntrypoints(
         inputPath: VIRTUAL_NOOP_BACKGROUND_MODULE_ID,
         name: 'background',
         type: 'background',
+        skipped: false,
       }),
     );
   }
 
   config.logger.debug('All entrypoints:', entrypoints);
+  const skippedEntrypointNames = entrypointInfos
+    .filter((item) => item.skipped)
+    .map((item) => item.name);
+  if (skippedEntrypointNames.length) {
+    config.logger.warn(
+      `Filter excluded the following entrypoints:\n${skippedEntrypointNames
+        .map((item) => `${pc.dim('-')} ${pc.cyan(item)}`)
+        .join('\n')}`,
+    );
+  }
   const targetEntrypoints = entrypoints.filter((entry) => {
     const { include, exclude } = entry.options;
     if (include?.length && exclude?.length) {
@@ -125,6 +144,9 @@ export async function findEntrypoints(
     if (include?.length && !exclude?.length) {
       return include.includes(config.browser);
     }
+    if (skippedEntrypointNames.includes(entry.name)) {
+      return false;
+    }
 
     return true;
   });
@@ -136,6 +158,10 @@ interface EntrypointInfo {
   name: string;
   inputPath: string;
   type: Entrypoint['type'];
+  /**
+   * @default false
+   */
+  skipped: boolean;
 }
 
 function preventDuplicateEntrypointNames(
@@ -202,7 +228,7 @@ function getHtmlBaseOptions(document: Document): BaseEntrypointOptions {
  */
 async function getPopupEntrypoint(
   config: InternalConfig,
-  { inputPath, name }: EntrypointInfo,
+  { inputPath, name, skipped }: EntrypointInfo,
 ): Promise<PopupEntrypoint> {
   const content = await fs.readFile(inputPath, 'utf-8');
   const { document } = parseHTML(content);
@@ -247,6 +273,7 @@ async function getPopupEntrypoint(
     options,
     inputPath,
     outputDir: config.outDir,
+    skipped,
   };
 }
 
@@ -256,7 +283,7 @@ async function getPopupEntrypoint(
  */
 async function getOptionsEntrypoint(
   config: InternalConfig,
-  { inputPath, name }: EntrypointInfo,
+  { inputPath, name, skipped }: EntrypointInfo,
 ): Promise<OptionsEntrypoint> {
   const content = await fs.readFile(inputPath, 'utf-8');
   const { document } = parseHTML(content);
@@ -290,6 +317,7 @@ async function getOptionsEntrypoint(
     options,
     inputPath,
     outputDir: config.outDir,
+    skipped,
   };
 }
 
@@ -299,7 +327,7 @@ async function getOptionsEntrypoint(
  */
 async function getUnlistedPageEntrypoint(
   config: InternalConfig,
-  { inputPath, name }: EntrypointInfo,
+  { inputPath, name, skipped }: EntrypointInfo,
 ): Promise<GenericEntrypoint> {
   const content = await fs.readFile(inputPath, 'utf-8');
   const { document } = parseHTML(content);
@@ -310,6 +338,7 @@ async function getUnlistedPageEntrypoint(
     inputPath,
     outputDir: config.outDir,
     options: getHtmlBaseOptions(document),
+    skipped,
   };
 }
 
@@ -319,7 +348,7 @@ async function getUnlistedPageEntrypoint(
  */
 async function getUnlistedScriptEntrypoint(
   config: InternalConfig,
-  { inputPath, name }: EntrypointInfo,
+  { inputPath, name, skipped }: EntrypointInfo,
 ): Promise<GenericEntrypoint> {
   const defaultExport = await importEntrypointFile<UnlistedScriptDefinition>(
     inputPath,
@@ -338,6 +367,7 @@ async function getUnlistedScriptEntrypoint(
     inputPath,
     outputDir: config.outDir,
     options,
+    skipped,
   };
 }
 
@@ -346,7 +376,7 @@ async function getUnlistedScriptEntrypoint(
  */
 async function getBackgroundEntrypoint(
   config: InternalConfig,
-  { inputPath, name }: EntrypointInfo,
+  { inputPath, name, skipped }: EntrypointInfo,
 ): Promise<BackgroundEntrypoint> {
   let options: Omit<BackgroundDefinition, 'main'> = {};
   if (inputPath !== VIRTUAL_NOOP_BACKGROUND_MODULE_ID) {
@@ -362,6 +392,11 @@ async function getBackgroundEntrypoint(
     const { main: _, ...moduleOptions } = defaultExport;
     options = moduleOptions;
   }
+
+  if (config.manifestVersion !== 3) {
+    delete options.type;
+  }
+
   return {
     type: 'background',
     name,
@@ -372,6 +407,7 @@ async function getBackgroundEntrypoint(
       type: resolvePerBrowserOption(options.type, config.browser),
       persistent: resolvePerBrowserOption(options.persistent, config.browser),
     },
+    skipped,
   };
 }
 
@@ -380,7 +416,7 @@ async function getBackgroundEntrypoint(
  */
 async function getContentScriptEntrypoint(
   config: InternalConfig,
-  { inputPath, name }: EntrypointInfo,
+  { inputPath, name, skipped }: EntrypointInfo,
 ): Promise<ContentScriptEntrypoint> {
   const { main: _, ...options } =
     await importEntrypointFile<ContentScriptDefinition>(inputPath, config);
@@ -395,6 +431,7 @@ async function getContentScriptEntrypoint(
     inputPath,
     outputDir: resolve(config.outDir, CONTENT_SCRIPT_OUT_DIR),
     options,
+    skipped,
   };
 }
 

src/core/utils/building/generate-wxt-dir.ts

@@ -79,8 +79,10 @@ import "wxt/browser";
 declare module "wxt/browser" {
   export type PublicPath =
 {{ union }}
+  type HtmlPublicPath = Extract<PublicPath, \`\${string}.html\`>
   export interface WxtRuntime extends Runtime.Static {
     getURL(path: PublicPath): string;
+    getURL(path: \`\${HtmlPublicPath}\${string}\`): string;
   }
 }
 `;
@@ -134,7 +136,7 @@ declare module "wxt/browser" {
 
   const overrides = messages.map((message) => {
     return `    /**
-     * ${message.description ?? 'No message description.'}
+     * ${message.description || 'No message description.'}
      *
      * "${message.message}"
      */
@@ -162,8 +164,11 @@ async function writeGlobalsDeclarationFile(
     [
       '// Generated by wxt',
       'export {}',
-      'declare global {',
-      ...globals.map((global) => `  const ${global.name}: ${global.type};`),
+      'interface ImportMetaEnv {',
+      ...globals.map((global) => `  readonly ${global.name}: ${global.type};`),
+      '}',
+      'interface ImportMeta {',
+      '  readonly env: ImportMetaEnv',
       '}',
     ].join('\n') + '\n',
   );

src/core/utils/building/get-internal-config.ts

@@ -12,7 +12,7 @@ import {
 import path from 'node:path';
 import { createFsCache } from '~/core/utils/cache';
 import consola, { LogLevels } from 'consola';
-import { craeteViteBuilder } from '~/core/builders/vite';
+import { createViteBuilder } from '~/core/builders/vite';
 import defu from 'defu';
 import { NullablyRequired } from '../types';
 
@@ -72,10 +72,14 @@ export async function getInternalConfig(
     srcDir,
     mergedConfig.entrypointsDir ?? 'entrypoints',
   );
+  const filterEntrypoints = !!mergedConfig.filterEntrypoints?.length
+    ? new Set(mergedConfig.filterEntrypoints)
+    : undefined;
   const publicDir = path.resolve(srcDir, mergedConfig.publicDir ?? 'public');
   const typesDir = path.resolve(wxtDir, 'types');
   const outBaseDir = path.resolve(root, mergedConfig.outDir ?? '.output');
   const outDir = path.resolve(outBaseDir, `${browser}-mv${manifestVersion}`);
+  const reloadCommand = mergedConfig.dev?.reloadCommand ?? 'Alt+R';
 
   const runnerConfig = await loadConfig<ExtensionRunnerConfig>({
     name: 'web-ext',
@@ -101,6 +105,7 @@ export async function getInternalConfig(
     command,
     debug,
     entrypointsDir,
+    filterEntrypoints,
     env,
     fsCache: createFsCache(wxtDir),
     imports: mergedConfig.imports ?? {},
@@ -132,9 +137,12 @@ export async function getInternalConfig(
         mergedConfig.experimental?.includeBrowserPolyfill ?? true,
     },
     server,
+    dev: {
+      reloadCommand,
+    },
   };
 
-  const builder = await craeteViteBuilder(
+  const builder = await createViteBuilder(
     inlineConfig,
     userConfig,
     finalConfig,
@@ -191,6 +199,8 @@ function mergeInlineConfig(
     configFile: inlineConfig.configFile,
     debug: inlineConfig.debug ?? userConfig.debug,
     entrypointsDir: inlineConfig.entrypointsDir ?? userConfig.entrypointsDir,
+    filterEntrypoints:
+      inlineConfig.filterEntrypoints ?? userConfig.filterEntrypoints,
     imports,
     logger: inlineConfig.logger ?? userConfig.logger,
     manifest,
@@ -215,6 +225,10 @@ function mergeInlineConfig(
     },
     vite: undefined,
     transformManifest: undefined,
+    dev: {
+      ...userConfig.dev,
+      ...inlineConfig.dev,
+    },
   };
 }
 
@@ -227,8 +241,9 @@ function resolveInternalZipConfig(
     sourcesTemplate: '{{name}}-{{version}}-sources.zip',
     artifactTemplate: '{{name}}-{{version}}-{{browser}}.zip',
     sourcesRoot: root,
+    includeSources: [],
     ...mergedConfig.zip,
-    ignoredSources: [
+    excludeSources: [
       '**/node_modules',
       // WXT files
       '**/web-ext.config.ts',
@@ -238,7 +253,7 @@ function resolveInternalZipConfig(
       '**/__tests__/**',
       '**/*.+(test|spec).?(c|m)+(j|t)s?(x)',
       // From user
-      ...(mergedConfig.zip?.ignoredSources ?? []),
+      ...(mergedConfig.zip?.excludeSources ?? []),
     ],
   };
 }

src/core/utils/building/group-entrypoints.ts

@@ -11,8 +11,11 @@ export function groupEntrypoints(entrypoints: Entrypoint[]): EntrypointGroup[] {
   const groups: EntrypointGroup[] = [];
 
   for (const entry of entrypoints) {
-    const group = ENTRY_TYPE_TO_GROUP_MAP[entry.type];
-    if (group === 'no-group') {
+    let group = ENTRY_TYPE_TO_GROUP_MAP[entry.type];
+    if (entry.type === 'background' && entry.options.type === 'module') {
+      group = 'esm';
+    }
+    if (group === 'individual') {
       groups.push(entry);
     } else {
       let groupIndex = groupIndexMap[group];
@@ -28,22 +31,22 @@ export function groupEntrypoints(entrypoints: Entrypoint[]): EntrypointGroup[] {
 }
 
 const ENTRY_TYPE_TO_GROUP_MAP: Record<Entrypoint['type'], Group> = {
-  sandbox: 'sandbox-page',
+  sandbox: 'sandboxed-esm',
 
-  popup: 'extension-page',
-  newtab: 'extension-page',
-  history: 'extension-page',
-  options: 'extension-page',
-  devtools: 'extension-page',
-  bookmarks: 'extension-page',
-  sidepanel: 'extension-page',
-  'unlisted-page': 'extension-page',
+  popup: 'esm',
+  newtab: 'esm',
+  history: 'esm',
+  options: 'esm',
+  devtools: 'esm',
+  bookmarks: 'esm',
+  sidepanel: 'esm',
+  'unlisted-page': 'esm',
 
-  background: 'no-group',
-  'content-script': 'no-group',
-  'unlisted-script': 'no-group',
-  'unlisted-style': 'no-group',
-  'content-script-style': 'no-group',
+  background: 'individual',
+  'content-script': 'individual',
+  'unlisted-script': 'individual',
+  'unlisted-style': 'individual',
+  'content-script-style': 'individual',
 };
 
-type Group = 'extension-page' | 'sandbox-page' | 'no-group';
+type Group = 'esm' | 'sandboxed-esm' | 'individual';

src/core/utils/building/import-entrypoint.ts

@@ -2,7 +2,7 @@ import createJITI, { TransformOptions as JitiTransformOptions } from 'jiti';
 import { InternalConfig } from '~/types';
 import { createUnimport } from 'unimport';
 import fs from 'fs-extra';
-import { resolve } from 'node:path';
+import { relative, resolve } from 'node:path';
 import { getUnimportOptions } from '~/core/utils/unimport';
 import { removeProjectImportStatements } from '~/core/utils/strings';
 import { normalizePath } from '~/core/utils/paths';
@@ -89,8 +89,18 @@ export async function importEntrypointFile<T>(
     const res = await jiti(path);
     return res.default;
   } catch (err) {
-    config.logger.error(err);
-    throw err;
+    const filePath = relative(config.root, path);
+    if (err instanceof ReferenceError) {
+      // "XXX is not defined" - usually due to WXT removing imports
+      const variableName = err.message.replace(' is not defined', '');
+      throw Error(
+        `${filePath}: Cannot use imported variable "${variableName}" outside the main function. See https://wxt.dev/guide/entrypoints.html#side-effects`,
+        { cause: err },
+      );
+    } else {
+      config.logger.error(err);
+      throw Error(`Failed to load entrypoint: ${filePath}`, { cause: err });
+    }
   }
 }
 

src/core/utils/building/internal-build.ts

@@ -1,5 +1,5 @@
 import { findEntrypoints } from './find-entrypoints';
-import { InternalConfig, BuildOutput } from '~/types';
+import { InternalConfig, BuildOutput, Entrypoint } from '~/types';
 import pc from 'picocolors';
 import fs from 'fs-extra';
 import { groupEntrypoints } from './group-entrypoints';
@@ -8,6 +8,15 @@ import { printBuildSummary } from '~/core/utils/log';
 import glob from 'fast-glob';
 import { unnormalizePath } from '~/core/utils/paths';
 import { rebuild } from './rebuild';
+import { relative } from 'node:path';
+import {
+  ValidationError,
+  ValidationResult,
+  ValidationResults,
+  validateEntrypoints,
+} from '../validation';
+import consola from 'consola';
+import { exec } from '../exec';
 
 /**
  * Builds the extension based on an internal config. No more config discovery is performed, the
@@ -37,8 +46,24 @@ export async function internalBuild(
 
   const entrypoints = await findEntrypoints(config);
   config.logger.debug('Detected entrypoints:', entrypoints);
+
+  const validationResults = validateEntrypoints(entrypoints);
+  if (validationResults.errorCount + validationResults.warningCount > 0) {
+    printValidationResults(config, validationResults);
+  }
+  if (validationResults.errorCount > 0) {
+    throw new ValidationError(`Entrypoint validation failed`, {
+      cause: validationResults,
+    });
+  }
+
   const groups = groupEntrypoints(entrypoints);
-  const { output } = await rebuild(config, groups, undefined);
+  const { output, warnings } = await rebuild(
+    config,
+    entrypoints,
+    groups,
+    undefined,
+  );
 
   // Post-build
   await printBuildSummary(
@@ -48,6 +73,10 @@ export async function internalBuild(
     config,
   );
 
+  for (const warning of warnings) {
+    config.logger.warn(...warning);
+  }
+
   if (config.analysis.enabled) {
     await combineAnalysisStats(config);
     config.logger.info(
@@ -59,17 +88,46 @@ export async function internalBuild(
 }
 
 async function combineAnalysisStats(config: InternalConfig): Promise<void> {
-  const { execaCommand } = await import('execa');
   const unixFiles = await glob(`stats-*.json`, {
     cwd: config.outDir,
     absolute: true,
   });
   const absolutePaths = unixFiles.map(unnormalizePath);
 
-  await execaCommand(
-    `rollup-plugin-visualizer ${absolutePaths.join(' ')} --template ${
-      config.analysis.template
-    }`,
+  await exec(
+    config,
+    'rollup-plugin-visualizer',
+    [...absolutePaths, '--template', config.analysis.template],
     { cwd: config.root, stdio: 'inherit' },
   );
 }
+
+function printValidationResults(
+  config: InternalConfig,
+  { errorCount, errors, warningCount }: ValidationResults,
+) {
+  (errorCount > 0 ? config.logger.error : config.logger.warn)(
+    `Entrypoint validation failed: ${errorCount} error${
+      errorCount === 1 ? '' : 's'
+    }, ${warningCount} warning${warningCount === 1 ? '' : 's'}`,
+  );
+
+  const cwd = process.cwd();
+  const entrypointErrors = errors.reduce((map, error) => {
+    const entryErrors = map.get(error.entrypoint) ?? [];
+    entryErrors.push(error);
+    map.set(error.entrypoint, entryErrors);
+    return map;
+  }, new Map<Entrypoint, ValidationResult[]>());
+
+  Array.from(entrypointErrors.entries()).forEach(([entrypoint, errors]) => {
+    consola.log(relative(cwd, entrypoint.inputPath));
+    console.log();
+    errors.forEach((err) => {
+      const type = err.type === 'error' ? pc.red('ERROR') : pc.yellow('WARN');
+      const recieved = pc.dim(`(recieved: ${JSON.stringify(err.value)})`);
+      consola.log(`  - ${type} ${err.message} ${recieved}`);
+    });
+    console.log();
+  });
+}

src/core/utils/building/rebuild.ts

@@ -1,6 +1,10 @@
 import type { Manifest } from '~/browser';
-import { BuildOutput, EntrypointGroup, InternalConfig } from '~/types';
-import { findEntrypoints } from './find-entrypoints';
+import {
+  BuildOutput,
+  Entrypoint,
+  EntrypointGroup,
+  InternalConfig,
+} from '~/types';
 import { generateTypesDir } from './generate-wxt-dir';
 import { buildEntrypoints } from './build-entrypoints';
 import { generateManifest, writeManifest } from '~/core/utils/manifest';
@@ -14,20 +18,30 @@ import { generateManifest, writeManifest } from '~/core/utils/manifest';
  * 2. Build the `entrypointGroups` (and copies public files)
  * 3. Generate the latest manifest for all entrypoints
  * 4. Write the new manifest to the file system
+ *
+ * @param config Internal config containing all the project information.
+ * @param allEntrypoints List of entrypoints used to generate the types inside .wxt directory.
+ * @param entrypointGroups The list of entrypoint groups to build.
+ * @param existingOutput The previous output to combine the rebuild results into. An emptry array if
+ *                       this is the first build.
  */
 export async function rebuild(
   config: InternalConfig,
+  allEntrypoints: Entrypoint[],
   entrypointGroups: EntrypointGroup[],
   existingOutput: Omit<BuildOutput, 'manifest'> = {
     steps: [],
     publicAssets: [],
   },
-): Promise<{ output: BuildOutput; manifest: Manifest.WebExtensionManifest }> {
+): Promise<{
+  output: BuildOutput;
+  manifest: Manifest.WebExtensionManifest;
+  warnings: any[][];
+}> {
   const { default: ora } = await import('ora');
   const spinner = ora(`Preparing...`).start();
 
   // Update types directory with new files and types
-  const allEntrypoints = await findEntrypoints(config);
   await generateTypesDir(allEntrypoints, config).catch((err) => {
     config.logger.warn('Failed to update .wxt directory:', err);
     // Throw the error if doing a regular build, don't for dev mode.
@@ -41,11 +55,8 @@ export async function rebuild(
     publicAssets: [...existingOutput.publicAssets, ...newOutput.publicAssets],
   };
 
-  const newManifest = await generateManifest(
-    allEntrypoints,
-    mergedOutput,
-    config,
-  );
+  const { manifest: newManifest, warnings: manifestWarnings } =
+    await generateManifest(allEntrypoints, mergedOutput, config);
   const finalOutput: BuildOutput = {
     manifest: newManifest,
     ...newOutput,
@@ -67,5 +78,6 @@ export async function rebuild(
       ],
     },
     manifest: newManifest,
+    warnings: manifestWarnings,
   };
 }

src/core/utils/exec.ts

@@ -0,0 +1,25 @@
+import type { Options } from 'execa';
+import managePath from 'manage-path';
+import { resolve } from 'node:path';
+import { InternalConfig } from '~/types';
+
+const managedPath = managePath(process.env);
+
+/**
+ * Wrapper around `execa` with a modified `PATH` variable containing CLI tools from WXT's dependencies.
+ */
+export const exec = async (
+  config: InternalConfig,
+  file: string,
+  args?: readonly string[],
+  options?: Options,
+) => {
+  // Reset so the same path isn't added multiple times
+  managedPath.restore();
+
+  // Add subdependency path for PNPM shamefully-hoist=false
+  managedPath.push(resolve(config.root, 'node_modules/wxt/node_modules/.bin'));
+
+  const { execa } = await import('execa');
+  return await execa(file, args, options);
+};

src/core/utils/globals.ts

@@ -5,42 +5,42 @@ export function getGlobals(
 ): Array<{ name: string; value: any; type: string }> {
   return [
     {
-      name: surroundInUnderscore('MANIFEST_VERSION'),
+      name: 'MANIFEST_VERSION',
       value: config.manifestVersion,
       type: `2 | 3`,
     },
     {
-      name: surroundInUnderscore('BROWSER'),
+      name: 'BROWSER',
       value: config.browser,
       type: `string`,
     },
     {
-      name: surroundInUnderscore('IS_CHROME'),
+      name: 'CHROME',
       value: config.browser === 'chrome',
       type: `boolean`,
     },
     {
-      name: surroundInUnderscore('IS_FIREFOX'),
+      name: 'FIREFOX',
       value: config.browser === 'firefox',
       type: `boolean`,
     },
     {
-      name: surroundInUnderscore('IS_SAFARI'),
+      name: 'SAFARI',
       value: config.browser === 'safari',
       type: `boolean`,
     },
     {
-      name: surroundInUnderscore('IS_EDGE'),
+      name: 'EDGE',
       value: config.browser === 'edge',
       type: `boolean`,
     },
     {
-      name: surroundInUnderscore('IS_OPERA'),
+      name: 'OPERA',
       value: config.browser === 'opera',
       type: `boolean`,
     },
     {
-      name: surroundInUnderscore('COMMAND'),
+      name: 'COMMAND',
       value: config.command,
       type: `"build" | "serve"`,
     },
@@ -50,17 +50,9 @@ export function getGlobals(
 export function getEntrypointGlobals(entrypointName: string) {
   return [
     {
-      name: surroundInUnderscore('ENTRYPOINT'),
+      name: 'ENTRYPOINT',
       value: entrypointName,
       type: `string`,
     },
   ];
 }
-
-/**
- * Don't hardcode the complete name so that the string litterals in this file aren't replaced during
- * tests (which causes syntax errors), only during builds.
- */
-function surroundInUnderscore(name: string): string {
-  return `__${name}__`;
-}

src/core/utils/manifest.ts

@@ -54,7 +54,8 @@ export async function generateManifest(
   entrypoints: Entrypoint[],
   buildOutput: Omit<BuildOutput, 'manifest'>,
   config: InternalConfig,
-): Promise<Manifest.WebExtensionManifest> {
+): Promise<{ manifest: Manifest.WebExtensionManifest; warnings: any[][] }> {
+  const warnings: any[][] = [];
   const pkg = await getPackageJson(config);
 
   let versionName =
@@ -75,16 +76,6 @@ export async function generateManifest(
     short_name: pkg?.shortName,
     icons: discoverIcons(buildOutput),
   };
-  if (config.command === 'serve') {
-    baseManifest.commands = {
-      'wxt:reload-extension': {
-        description: 'Reload the extension during development',
-        suggested_key: {
-          default: 'Alt+R',
-        },
-      },
-    };
-  }
   const userManifest = config.manifest;
 
   const manifest = defu(
@@ -92,6 +83,23 @@ export async function generateManifest(
     baseManifest,
   ) as Manifest.WebExtensionManifest;
 
+  // Add reload command in dev mode
+  if (config.command === 'serve' && config.dev.reloadCommand) {
+    if (manifest.commands && Object.keys(manifest.commands).length >= 4) {
+      warnings.push([
+        "Extension already has 4 registered commands, WXT's reload command is disabled",
+      ]);
+    } else {
+      manifest.commands ??= {};
+      manifest.commands['wxt:reload-extension'] = {
+        description: 'Reload the extension during development',
+        suggested_key: {
+          default: config.dev.reloadCommand,
+        },
+      };
+    }
+  }
+
   // Apply the final version fields after merging the user manifest
   manifest.version = version;
   manifest.version_name =
@@ -117,7 +125,10 @@ export async function generateManifest(
     );
   }
 
-  return finalManifest;
+  return {
+    manifest: finalManifest,
+    warnings,
+  };
 }
 
 /**

src/core/utils/testing/fake-objects.ts

@@ -4,7 +4,7 @@
 import { resolve } from 'path';
 import { faker } from '@faker-js/faker';
 import merge from 'lodash.merge';
-import type { Manifest } from '~/browser';
+import { Commands, type Manifest } from '~/browser';
 import {
   FsCache,
   InternalConfig,
@@ -22,6 +22,7 @@ import {
   UserManifest,
 } from '~/types';
 import { mock } from 'vitest-mock-extended';
+import { vi } from 'vitest';
 
 faker.seed(__TEST_SEED__);
 
@@ -59,7 +60,7 @@ export const fakeContentScriptEntrypoint =
     name: faker.string.alpha(),
     options: {
       matches: [],
-      matchAboutBlank: faker.helpers.arrayElement([true, false, undefined]),
+      matchAboutBlank: faker.datatype.boolean(),
       matchOriginAsFallback: faker.helpers.arrayElement([
         true,
         false,
@@ -73,6 +74,7 @@ export const fakeContentScriptEntrypoint =
       ]),
     },
     outputDir: fakeDir('.output'),
+    skipped: faker.datatype.boolean(),
   }));
 
 export const fakeBackgroundEntrypoint = fakeObjectCreator<BackgroundEntrypoint>(
@@ -81,10 +83,11 @@ export const fakeBackgroundEntrypoint = fakeObjectCreator<BackgroundEntrypoint>(
     inputPath: 'entrypoints/background.ts',
     name: 'background',
     options: {
-      persistent: faker.helpers.arrayElement([true, false, undefined]),
+      persistent: faker.datatype.boolean(),
       type: faker.helpers.maybe(() => 'module'),
     },
     outputDir: fakeDir('.output'),
+    skipped: faker.datatype.boolean(),
   }),
 );
 
@@ -95,6 +98,7 @@ export const fakeUnlistedScriptEntrypoint =
     name: faker.string.alpha(),
     outputDir: fakeDir('.output'),
     options: {},
+    skipped: faker.datatype.boolean(),
   }));
 
 export const fakeOptionsEntrypoint = fakeObjectCreator<OptionsEntrypoint>(
@@ -104,10 +108,11 @@ export const fakeOptionsEntrypoint = fakeObjectCreator<OptionsEntrypoint>(
     name: 'options',
     outputDir: fakeDir('.output'),
     options: {
-      browserStyle: faker.helpers.arrayElement([true, false, undefined]),
-      chromeStyle: faker.helpers.arrayElement([true, false, undefined]),
-      openInTab: faker.helpers.arrayElement([true, false, undefined]),
+      browserStyle: faker.datatype.boolean(),
+      chromeStyle: faker.datatype.boolean(),
+      openInTab: faker.datatype.boolean(),
     },
+    skipped: faker.datatype.boolean(),
   }),
 );
 
@@ -134,6 +139,7 @@ export const fakePopupEntrypoint = fakeObjectCreator<PopupEntrypoint>(() => ({
       undefined,
     ]),
   },
+  skipped: faker.datatype.boolean(),
 }));
 
 export const fakeGenericEntrypoint = fakeObjectCreator<GenericEntrypoint>(
@@ -152,6 +158,7 @@ export const fakeGenericEntrypoint = fakeObjectCreator<GenericEntrypoint>(
     name: faker.string.alpha(),
     outputDir: fakeDir('.output'),
     options: {},
+    skipped: faker.datatype.boolean(),
   }),
 );
 
@@ -226,7 +233,8 @@ export const fakeInternalConfig = fakeObjectCreator<InternalConfig>(() => {
     },
     zip: {
       artifactTemplate: '{{name}}-{{version}}.zip',
-      ignoredSources: [],
+      includeSources: [],
+      excludeSources: [],
       sourcesRoot: fakeDir(),
       sourcesTemplate: '{{name}}-sources.zip',
       name: faker.person.firstName().toLowerCase(),
@@ -238,6 +246,9 @@ export const fakeInternalConfig = fakeObjectCreator<InternalConfig>(() => {
       includeBrowserPolyfill: true,
     },
     builder: mock(),
+    dev: {
+      reloadCommand: 'Alt+R',
+    },
   };
 });
 
@@ -251,3 +262,28 @@ export const fakeBuildStepOutput = fakeObjectCreator<BuildStepOutput>(() => ({
   chunks: fakeArray(fakeOutputChunk),
   entrypoints: fakeArray(fakeEntrypoint),
 }));
+
+export const fakeManifestCommand = fakeObjectCreator<Commands.Command>(() => ({
+  description: faker.string.sample(),
+  shortcut: `${faker.helpers.arrayElement(['ctrl', 'alt'])}+${faker.number.int({
+    min: 0,
+    max: 9,
+  })}`,
+}));
+
+export const fakeDevServer = fakeObjectCreator<WxtDevServer>(() => ({
+  hostname: 'localhost',
+  origin: 'http://localhost',
+  port: 5173,
+  reloadContentScript: vi.fn(),
+  reloadExtension: vi.fn(),
+  reloadPage: vi.fn(),
+  restart: vi.fn(),
+  restartBrowser: vi.fn(),
+  stop: vi.fn(),
+  start: vi.fn(),
+  watcher: mock(),
+  transformHtml: vi.fn(),
+  ws: mock(),
+  currentOutput: undefined,
+}));

src/core/utils/validation.ts

@@ -0,0 +1,86 @@
+import { ContentScriptEntrypoint, Entrypoint } from '~/types';
+
+export function validateEntrypoints(
+  entrypoints: Entrypoint[],
+): ValidationResults {
+  const errors = entrypoints.flatMap((entrypoint) => {
+    switch (entrypoint.type) {
+      case 'content-script':
+        return validateContentScriptEntrypoint(entrypoint);
+      default:
+        return validateBaseEntrypoint(entrypoint);
+    }
+  });
+
+  let errorCount = 0;
+  let warningCount = 0;
+  for (const err of errors) {
+    if (err.type === 'warning') warningCount++;
+    else errorCount++;
+  }
+
+  return {
+    errors,
+    errorCount,
+    warningCount,
+  };
+}
+
+function validateContentScriptEntrypoint(
+  definition: ContentScriptEntrypoint,
+): ValidationResult[] {
+  const errors = validateBaseEntrypoint(definition);
+  if (definition.options.matches == null) {
+    errors.push({
+      type: 'error',
+      message: '`matches` is required',
+      value: definition.options.matches,
+      entrypoint: definition,
+    });
+  }
+  return errors;
+}
+
+function validateBaseEntrypoint(definition: Entrypoint): ValidationResult[] {
+  const errors: ValidationResult[] = [];
+
+  if (
+    definition.options.exclude != null &&
+    !Array.isArray(definition.options.exclude)
+  ) {
+    errors.push({
+      type: 'error',
+      message: '`exclude` must be an array of browser names',
+      value: definition.options.exclude,
+      entrypoint: definition,
+    });
+  }
+  if (
+    definition.options.include != null &&
+    !Array.isArray(definition.options.include)
+  ) {
+    errors.push({
+      type: 'error',
+      message: '`include` must be an array of browser names',
+      value: definition.options.include,
+      entrypoint: definition,
+    });
+  }
+
+  return errors;
+}
+
+export interface ValidationResult {
+  type: 'warning' | 'error';
+  message: string;
+  entrypoint: Entrypoint;
+  value: any;
+}
+
+export interface ValidationResults {
+  errors: ValidationResult[];
+  errorCount: number;
+  warningCount: number;
+}
+
+export class ValidationError extends Error {}

src/core/zip.ts

@@ -62,10 +62,15 @@ export async function zip(config?: InlineConfig): Promise<string[]> {
       saveTo: sourcesZipPath,
       filter(path) {
         const relativePath = relative(internalConfig.zip.sourcesRoot, path);
-        const matchedPattern = internalConfig.zip.ignoredSources.find(
-          (pattern) => minimatch(relativePath, pattern),
+
+        return (
+          internalConfig.zip.includeSources.some((pattern) =>
+            minimatch(relativePath, pattern),
+          ) ||
+          !internalConfig.zip.excludeSources.some((pattern) =>
+            minimatch(relativePath, pattern),
+          )
         );
-        return matchedPattern == null;
       },
     });
     zipFiles.push(sourcesZipPath);

src/storage.ts

@@ -308,10 +308,20 @@ function createDriver(
   storageArea: 'local' | 'session' | 'sync' | 'managed',
 ): WxtStorageDriver {
   const getStorageArea = () => {
-    if (browser.storage == null)
+    if (browser.runtime == null) {
+      throw Error(
+        [
+          "'wxt/storage' must be loaded in a web extension environment",
+          '\n - If thrown during a build, see https://github.com/wxt-dev/wxt/issues/371',
+          " - If thrown during tests, mock 'wxt/browser' correctly. See https://wxt.dev/guide/testing.html\n",
+        ].join('\n'),
+      );
+    }
+    if (browser.storage == null) {
       throw Error(
         "You must add the 'storage' permission to your manifest to use 'wxt/storage'",
       );
+    }
 
     return browser.storage[storageArea];
   };

src/types/external.ts

@@ -31,6 +31,12 @@ export interface InlineConfig {
    * @default "${config.srcDir}/entrypoints"
    */
   entrypointsDir?: string;
+  /**
+   * A list of entrypoint names (`"popup"`, `"options"`, etc.) to build. Will speed up the build if
+   * your extension has lots of entrypoints, and you don't need to build all of them to develop a
+   * feature.
+   */
+  filterEntrypoints?: string[];
   /**
    * Output directory that stored build folders and ZIPs.
    *
@@ -137,9 +143,22 @@ export interface InlineConfig {
      * @default config.root
      */
     sourcesRoot?: string;
+    /**
+     * [Minimatch](https://www.npmjs.com/package/minimatch) patterns of files to include when
+     * creating a ZIP of all your source code for Firefox. Patterns are relative to your
+     * `config.zip.sourcesRoot`.
+     *
+     * This setting overrides `excludeSources`. So if a file matches both lists, it is included in the ZIP.
+     *
+     * @example
+     * [
+     *   "coverage", // Ignore the coverage directory in the `sourcesRoot`
+     * ]
+     */
+    includeSources?: string[];
     /**
      * [Minimatch](https://www.npmjs.com/package/minimatch) patterns of files to exclude when
-     * creating a ZIP of all your source code for Firfox. Patterns are relative to your
+     * creating a ZIP of all your source code for Firefox. Patterns are relative to your
      * `config.zip.sourcesRoot`.
      *
      * Hidden files, node_modules, and tests are ignored by default.
@@ -149,7 +168,7 @@ export interface InlineConfig {
      *   "coverage", // Ignore the coverage directory in the `sourcesRoot`
      * ]
      */
-    ignoredSources?: string[];
+    excludeSources?: string[];
   };
 
   /**
@@ -223,6 +242,24 @@ export interface InlineConfig {
      */
     includeBrowserPolyfill?: boolean;
   };
+  /**
+   * Config effecting dev mode only.
+   */
+  dev?: {
+    /**
+     * Controls whether a custom keyboard shortcut command, `Alt+R`, is added during dev mode to
+     * quickly reload the extension.
+     *
+     * If false, the shortcut is not added during development.
+     *
+     * If set to a custom string, you can override the key combo used. See
+     * [Chrome's command docs](https://developer.chrome.com/docs/extensions/reference/api/commands)
+     * for available options.
+     *
+     * @default "Alt+R"
+     */
+    reloadCommand?: string | false;
+  };
 }
 
 // TODO: Extract to @wxt/vite-builder and use module augmentation to include the vite field
@@ -284,16 +321,24 @@ export interface BuildStepOutput {
 }
 
 export interface WxtDevServer
-  extends Omit<WxtBuilderServer, 'listen'>,
+  extends Omit<WxtBuilderServer, 'listen' | 'close'>,
     ServerInfo {
   /**
    * Stores the current build output of the server.
    */
-  currentOutput: BuildOutput;
+  currentOutput: BuildOutput | undefined;
   /**
    * Start the server.
    */
   start(): Promise<void>;
+  /**
+   * Stop the server.
+   */
+  stop(): Promise<void>;
+  /**
+   * Close the browser, stop the server, rebuild the entire extension, and start the server again.
+   */
+  restart(): Promise<void>;
   /**
    * Transform the HTML for dev mode.
    */
@@ -326,6 +371,10 @@ export interface WxtDevServer
   reloadContentScript: (
     contentScript: Omit<Scripting.RegisteredContentScript, 'id'>,
   ) => void;
+  /**
+   * Grab the latest runner config and restart the browser.
+   */
+  restartBrowser: () => void;
 }
 
 export type TargetBrowser = string;
@@ -377,6 +426,7 @@ export interface BaseEntrypoint {
    */
   outputDir: string;
   options: BaseEntrypointOptions;
+  skipped: boolean;
 }
 
 export interface GenericEntrypoint extends BaseEntrypoint {
@@ -624,6 +674,33 @@ export interface ExtensionRunnerConfig {
    * @see https://extensionworkshop.com/documentation/develop/web-ext-command-reference/#chromium-profile
    */
   chromiumProfile?: string;
+  /**
+   * An map of chrome preferences from https://chromium.googlesource.com/chromium/src/+/main/chrome/common/pref_names.h
+   *
+   * @example
+   * // change your downloads directory
+   * {
+   *   download: {
+   *     default_directory: "/my/custom/dir",
+   *   },
+   * }
+   *
+   * @default
+   * // Enable dev mode and allow content script sourcemaps
+   * {
+   *   devtools: {
+   *     synced_preferences_sync_disabled: {
+   *       skipContentScripts: false,
+   *     },
+   *   }
+   *   extensions: {
+   *     ui: {
+   *       developer_mode: true,
+   *     },
+   *   }
+   * }
+   */
+  chromiumPref?: string;
   /**
    * @see https://extensionworkshop.com/documentation/develop/web-ext-command-reference/#pref
    */
@@ -667,6 +744,10 @@ export interface WxtBuilderServer {
    * Start the server.
    */
   listen(): Promise<void>;
+  /**
+   * Stop the server.
+   */
+  close(): Promise<void>;
   /**
    * Transform the HTML for dev mode.
    */

src/types/globals.d.ts

@@ -1,7 +1,10 @@
-// Globals defined by the vite-plugins/devServerGlobals.ts and utils/globals.ts
-declare const __COMMAND__: 'build' | 'serve';
 declare const __DEV_SERVER_PROTOCOL__: string;
 declare const __DEV_SERVER_HOSTNAME__: string;
 declare const __DEV_SERVER_PORT__: string;
-declare const __MANIFEST_VERSION__: 2 | 3;
-declare const __ENTRYPOINT__: string;
+
+// Globals defined by the vite-plugins/devServerGlobals.ts and utils/globals.ts
+interface ImportMetaEnv {
+  readonly COMMAND: 'build' | 'serve';
+  readonly MANIFEST_VERSION: 2 | 3;
+  readonly ENTRYPOINT: string;
+}

src/types/internal.ts

@@ -21,6 +21,7 @@ export interface InternalConfig {
   wxtDir: string;
   typesDir: string;
   entrypointsDir: string;
+  filterEntrypoints?: Set<string>;
   outBaseDir: string;
   outDir: string;
   debug: boolean;
@@ -39,7 +40,8 @@ export interface InternalConfig {
     name?: string;
     artifactTemplate: string;
     sourcesTemplate: string;
-    ignoredSources: string[];
+    includeSources: string[];
+    excludeSources: string[];
     sourcesRoot: string;
   };
   transformManifest: (manifest: Manifest.WebExtensionManifest) => void;
@@ -56,6 +58,9 @@ export interface InternalConfig {
     includeBrowserPolyfill: boolean;
   };
   builder: WxtBuilder;
+  dev: {
+    reloadCommand: string | false;
+  };
 }
 
 export interface FsCache {

src/types/modules.d.ts

@@ -50,6 +50,18 @@ declare module 'web-ext-run/util/logger' {
   export const consoleStream: IConsoleStream;
 }
 
+declare module 'manage-path' {
+  export interface ManagedPath {
+    push(...paths: string[]);
+    push(paths: string[]);
+    shift(...paths: string[]);
+    shift(paths: string[]);
+    get(): string;
+    restore(): void;
+  }
+  export default function managePath(env: object): ManagedPath;
+}
+
 declare module 'wxt/browser' {
   // Overridden when types are generated per project
   export type PublicPath = string;

src/virtual/background-entrypoint.ts

@@ -5,7 +5,7 @@ import { browser } from 'wxt/browser';
 import { keepServiceWorkerAlive } from './utils/keep-service-worker-alive';
 import { reloadContentScript } from './utils/reload-content-scripts';
 
-if (__COMMAND__ === 'serve') {
+if (import.meta.env.COMMAND === 'serve') {
   try {
     const ws = setupWebSocket((message) => {
       if (message.event === 'wxt:reload-extension') browser.runtime.reload();
@@ -13,7 +13,7 @@ if (__COMMAND__ === 'serve') {
         reloadContentScript(message.data);
     });
 
-    if (__MANIFEST_VERSION__ === 3) {
+    if (import.meta.env.MANIFEST_VERSION === 3) {
       // Tell the server the background script is loaded and ready to go
       ws.addEventListener('open', () => {
         const msg = { type: 'custom', event: 'wxt:background-initialized' };

src/virtual/content-script-isolated-world-entrypoint.ts

@@ -5,12 +5,12 @@ import { ContentScriptContext } from 'wxt/client';
 (async () => {
   try {
     const { main, ...options } = definition;
-    const ctx = new ContentScriptContext(__ENTRYPOINT__, options);
+    const ctx = new ContentScriptContext(import.meta.env.ENTRYPOINT, options);
 
     await main(ctx);
   } catch (err) {
     logger.error(
-      `The content script "${__ENTRYPOINT__}" crashed on startup!`,
+      `The content script "${import.meta.env.ENTRYPOINT}" crashed on startup!`,
       err,
     );
   }

src/virtual/content-script-main-world-entrypoint.ts

@@ -7,7 +7,7 @@ import { logger } from '../sandbox/utils/logger';
     await main();
   } catch (err) {
     logger.error(
-      `The content script "${__ENTRYPOINT__}" crashed on startup!`,
+      `The content script "${import.meta.env.ENTRYPOINT}" crashed on startup!`,
       err,
     );
   }

src/virtual/reload-html.ts

@@ -1,7 +1,7 @@
 import { logger } from '../sandbox/utils/logger';
 import { setupWebSocket } from './utils/setup-web-socket';
 
-if (__COMMAND__ === 'serve') {
+if (import.meta.env.COMMAND === 'serve') {
   try {
     setupWebSocket((message) => {
       if (message.event === 'wxt:reload-page') {

src/virtual/unlisted-script-entrypoint.ts

@@ -6,7 +6,7 @@ import { logger } from '../sandbox/utils/logger';
     await definition.main();
   } catch (err) {
     logger.error(
-      `The unlisted script "${__ENTRYPOINT__}" crashed on startup!`,
+      `The unlisted script "${import.meta.env.ENTRYPOINT}" crashed on startup!`,
       err,
     );
   }

templates/react/package.json

@@ -23,6 +23,6 @@
     "@types/react-dom": "^18.2.18",
     "@vitejs/plugin-react": "^4.2.1",
     "typescript": "^5.3.3",
-    "wxt": "^0.13.0"
+    "wxt": "^0.15.0"
   }
 }

templates/solid/package.json

@@ -20,6 +20,6 @@
   "devDependencies": {
     "typescript": "^5.3.3",
     "vite-plugin-solid": "^2.8.0",
-    "wxt": "^0.13.0"
+    "wxt": "^0.15.0"
   }
 }

templates/svelte/package.json

@@ -20,6 +20,6 @@
     "svelte-check": "^3.6.2",
     "tslib": "^2.6.2",
     "typescript": "^5.3.3",
-    "wxt": "^0.13.0"
+    "wxt": "^0.15.0"
   }
 }

templates/vanilla/package.json

@@ -16,6 +16,6 @@
   },
   "devDependencies": {
     "typescript": "^5.3.3",
-    "wxt": "^0.13.0"
+    "wxt": "^0.15.0"
   }
 }

templates/vue/package.json

@@ -21,6 +21,6 @@
     "@vitejs/plugin-vue": "^5.0.1",
     "typescript": "^5.3.3",
     "vue-tsc": "^1.8.27",
-    "wxt": "^0.13.0"
+    "wxt": "^0.15.0"
   }
 }