diff --git a/src/types/external.ts b/src/types/external.ts
index 736af75c..84e1741c 100644
--- a/src/types/external.ts
+++ b/src/types/external.ts
@@ -37,7 +37,7 @@ export interface WxtDevServer extends vite.ViteDevServer {
   origin: string;
 }
 
-export type TargetBrowser = 'chromium' | 'firefox';
+export type TargetBrowser = 'chrome' | 'firefox' | 'safari' | 'edge' | 'opera';
 export type TargetManifestVersion = 2 | 3;
 
 export type UserConfig = Omit<InlineConfig, 'configFile'>;
diff --git a/src/utils/getInternalConfig.ts b/src/utils/getInternalConfig.ts
index 98b27167..59387faf 100644
--- a/src/utils/getInternalConfig.ts
+++ b/src/utils/getInternalConfig.ts
@@ -19,9 +19,9 @@ export async function getInternalConfig(
   const root = config.root ? path.resolve(config.root) : process.cwd();
   const mode =
     config.mode ?? (command === 'build' ? 'production' : 'development');
-  const browser = config.browser ?? 'chromium';
+  const browser = config.browser ?? 'chrome';
   const manifestVersion =
-    config.manifestVersion ?? (browser === 'chromium' ? 3 : 2);
+    config.manifestVersion ?? (browser == 'firefox' ? 2 : 3);
   const outBaseDir = path.resolve(root, '.output');
   const outDir = path.resolve(outBaseDir, `${browser}-mv${manifestVersion}`);
   const logger = config.logger ?? consola;
diff --git a/src/utils/globals.ts b/src/utils/globals.ts
index d966a373..bfb585bc 100644
--- a/src/utils/globals.ts
+++ b/src/utils/globals.ts
@@ -15,8 +15,8 @@ export function getGlobals(
       type: `"chromium" | "firefox"`,
     },
     {
-      name: '__IS_CHROMIUM__',
-      value: config.browser === 'chromium',
+      name: '__IS_CHROME__',
+      value: config.browser === 'chrome',
       type: `boolean`,
     },
     {
@@ -24,5 +24,20 @@ export function getGlobals(
       value: config.browser === 'firefox',
       type: `boolean`,
     },
+    {
+      name: '__IS_SAFARI__',
+      value: config.browser === 'safari',
+      type: `boolean`,
+    },
+    {
+      name: '__IS_EDGE__',
+      value: config.browser === 'edge',
+      type: `boolean`,
+    },
+    {
+      name: '__IS_OPERA__',
+      value: config.browser === 'opera',
+      type: `boolean`,
+    },
   ];
 }
diff --git a/src/utils/manifest.ts b/src/utils/manifest.ts
index bfdb626a..ef2af805 100644
--- a/src/utils/manifest.ts
+++ b/src/utils/manifest.ts
@@ -222,7 +222,7 @@ function addEntrypoints(
       browser_style:
         config.browser === 'firefox' ? options.options.browserStyle : undefined,
       chrome_style:
-        config.browser === 'chromium' ? options.options.chromeStyle : undefined,
+        config.browser !== 'firefox' ? options.options.chromeStyle : undefined,
       page,
     };
   }
@@ -257,12 +257,12 @@ function addEntrypoints(
         // ...defaultSidepanel.options,
         default_panel: page,
       };
-    } else if (config.browser === 'chromium' && config.manifestVersion === 3) {
+    } else if (config.manifestVersion === 3) {
       // @ts-expect-error: Untyped
       manifest.side_panel = {
         default_path: page,
       };
-    } else if (config.browser === 'chromium') {
+    } else {
       config.logger.warn(
         'Side panel not supported by Chromium using MV2. side_panel.default_path was not added to the manifest',
       );