diff --git a/packages/wxt/src/browser/chrome.ts b/packages/wxt/src/browser/chrome.ts
index 6111ac7d..d95bf905 100644
--- a/packages/wxt/src/browser/chrome.ts
+++ b/packages/wxt/src/browser/chrome.ts
@@ -1,4 +1,6 @@
 /// <reference types="chrome" />
+import type { WxtRuntime, WxtI18n } from './index';
+
 /**
  * EXPERIMENTAL
  *
@@ -7,13 +9,6 @@
  * @module wxt/browser/chrome
  */
 
-export interface WxtRuntime {
-  // Overriden per-project
-}
-export interface WxtI18n {
-  // Overriden per-project
-}
-
 export type Chrome = typeof chrome;
 export type WxtBrowser = Omit<Chrome, 'runtime' | 'i18n'> & {
   runtime: WxtRuntime & Omit<Chrome['runtime'], 'getURL'>;
diff --git a/packages/wxt/src/browser/index.ts b/packages/wxt/src/browser/index.ts
index fee152da..eeb0a4f3 100644
--- a/packages/wxt/src/browser/index.ts
+++ b/packages/wxt/src/browser/index.ts
@@ -4,18 +4,18 @@
  * @module wxt/browser
  */
 
-import originalBrowser, { Browser, Runtime, I18n } from 'webextension-polyfill';
+import originalBrowser, { Browser } from 'webextension-polyfill';
 
-export interface AugmentedBrowser extends Browser {
-  runtime: WxtRuntime;
-  i18n: WxtI18n;
-}
+export type AugmentedBrowser = Omit<Browser, 'runtime' | 'i18n'> & {
+  runtime: WxtRuntime & Omit<Browser['runtime'], 'getURL'>;
+  i18n: WxtI18n & Omit<Browser['i18n'], 'getMessage'>;
+};
 
-export interface WxtRuntime extends Runtime.Static {
+export interface WxtRuntime {
   // Overriden per-project
 }
 
-export interface WxtI18n extends I18n.Static {
+export interface WxtI18n {
   // Overriden per-project
 }
 
diff --git a/packages/wxt/src/client/content-scripts/ui/index.ts b/packages/wxt/src/client/content-scripts/ui/index.ts
index 9abd5cf6..c9ba6fb4 100644
--- a/packages/wxt/src/client/content-scripts/ui/index.ts
+++ b/packages/wxt/src/client/content-scripts/ui/index.ts
@@ -62,6 +62,7 @@ export function createIframeUi<TMounted>(
   const wrapper = document.createElement('div');
   wrapper.setAttribute('data-wxt-iframe', '');
   const iframe = document.createElement('iframe');
+  // @ts-expect-error: getURL is defined per-project, but not inside the package
   iframe.src = browser.runtime.getURL(options.page);
   wrapper.appendChild(iframe);
 
@@ -258,6 +259,7 @@ function mountUi(
  * Load the CSS for the current entrypoint.
  */
 async function loadCss(): Promise<string> {
+  // @ts-expect-error: getURL is defined per-project, but not inside the package
   const url = browser.runtime.getURL(
     `/content-scripts/${import.meta.env.ENTRYPOINT}.css`,
   );
diff --git a/packages/wxt/src/core/utils/building/generate-wxt-dir.ts b/packages/wxt/src/core/utils/building/generate-wxt-dir.ts
index 386dd55d..74bdf433 100644
--- a/packages/wxt/src/core/utils/building/generate-wxt-dir.ts
+++ b/packages/wxt/src/core/utils/building/generate-wxt-dir.ts
@@ -94,9 +94,9 @@ async function getPathsDeclarationEntry(
     .join('\n');
 
   const template = `// Generated by wxt
-import "${wxt.config.browserModule}";
+import "wxt/browser";
 
-declare module "${wxt.config.browserModule}" {
+declare module "wxt/browser" {
   export type PublicPath =
 {{ union }}
   type HtmlPublicPath = Extract<PublicPath, \`\${string}.html\`>
@@ -117,9 +117,9 @@ declare module "${wxt.config.browserModule}" {
 async function getI18nDeclarationEntry(): Promise<WxtDirFileEntry> {
   const defaultLocale = wxt.config.manifest.default_locale;
   const template = `// Generated by wxt
-import "${wxt.config.browserModule}";
+import "wxt/browser";
 
-declare module "${wxt.config.browserModule}" {
+declare module "wxt/browser" {
   /**
    * See https://developer.chrome.com/docs/extensions/reference/i18n/#method-getMessage
    */
diff --git a/packages/wxt/src/core/utils/building/resolve-config.ts b/packages/wxt/src/core/utils/building/resolve-config.ts
index 7bb7fcc7..6959b5b0 100644
--- a/packages/wxt/src/core/utils/building/resolve-config.ts
+++ b/packages/wxt/src/core/utils/building/resolve-config.ts
@@ -183,8 +183,6 @@ export async function resolveConfig(
     userConfigMetadata: userConfigMetadata ?? {},
     alias,
     extensionApi,
-    browserModule:
-      extensionApi === 'chrome' ? 'wxt/browser/chrome' : 'wxt/browser',
     entrypointLoader: mergedConfig.entrypointLoader ?? 'vite-node',
     experimental: defu(mergedConfig.experimental, {}),
     dev: {
diff --git a/packages/wxt/src/core/utils/testing/fake-objects.ts b/packages/wxt/src/core/utils/testing/fake-objects.ts
index 63906398..51f628ae 100644
--- a/packages/wxt/src/core/utils/testing/fake-objects.ts
+++ b/packages/wxt/src/core/utils/testing/fake-objects.ts
@@ -297,7 +297,6 @@ export const fakeResolvedConfig = fakeObjectCreator<ResolvedConfig>(() => {
     userConfigMetadata: {},
     alias: {},
     extensionApi: 'webextension-polyfill',
-    browserModule: 'wxt/browser',
     entrypointLoader: 'vite-node',
     experimental: {},
     dev: {
diff --git a/packages/wxt/src/types.ts b/packages/wxt/src/types.ts
index 747a6898..f65a7d6c 100644
--- a/packages/wxt/src/types.ts
+++ b/packages/wxt/src/types.ts
@@ -1215,7 +1215,6 @@ export interface ResolvedConfig {
    */
   alias: Record<string, string>;
   extensionApi: 'webextension-polyfill' | 'chrome';
-  browserModule: 'wxt/browser' | 'wxt/browser/chrome';
   entrypointLoader: 'vite-node' | 'jiti';
   experimental: {};
   dev: {