diff --git a/package.json b/package.json
index f9163c2..9293284 100644
--- a/package.json
+++ b/package.json
@@ -1,14 +1,14 @@
 {
   "name": "reels-master",
-  "version": "1.1.2",
+  "version": "1.2.1",
   "description": "Chrome extension for Instagram Reels with volume control and download functionality",
   "main": "index.js",
   "scripts": {
-    "dev": "BROWSER=chrome vite build --watch",
-    "dev:firefox": "BROWSER=firefox vite build --watch",
+    "dev": "BROWSER=chrome BUILD_ENTRY=background vite build && BROWSER=chrome BUILD_ENTRY=content vite build --watch",
+    "dev:firefox": "BROWSER=firefox BUILD_ENTRY=background vite build && BROWSER=firefox BUILD_ENTRY=content vite build --watch",
     "build": "pnpm build:chrome && pnpm build:firefox",
-    "build:chrome": "BROWSER=chrome vite build",
-    "build:firefox": "BROWSER=firefox vite build",
+    "build:chrome": "BROWSER=chrome BUILD_ENTRY=background vite build && BROWSER=chrome BUILD_ENTRY=content vite build",
+    "build:firefox": "BROWSER=firefox BUILD_ENTRY=background vite build && BROWSER=firefox BUILD_ENTRY=content vite build",
     "bundle": "vite build && node scripts/bundle.js",
     "type-check": "tsc --noEmit"
   },
diff --git a/src/manifest.firefox.json b/src/manifest.firefox.json
index 9f107e8..4c82244 100644
--- a/src/manifest.firefox.json
+++ b/src/manifest.firefox.json
@@ -4,7 +4,7 @@
     "version": "1.1.2",
     "description": "Enhance your Instagram experience with Reels Master - download reels, seek through videos, and more!",
     "background": {
-      "service_worker": "background/background.js"
+      "scripts": ["background/background.js"]
     },
     "homepage_url": "https://shiftyspace.ru",
     "author": "ShiftyX1",
diff --git a/vite.config.ts b/vite.config.ts
index 19a3396..e389339 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -5,15 +5,27 @@ import AdmZip from 'adm-zip';
 
 const browser = process.env.BROWSER || 'chrome';
 
+const buildEntry = process.env.BUILD_ENTRY; // 'background' | 'content' | undefined (both)
+
+const inputs =
+  buildEntry === 'background'
+    ? { background: resolve(__dirname, 'src/background/service-worker.ts') }
+    : buildEntry === 'content'
+    ? { content: resolve(__dirname, 'src/content/content.ts') }
+    : {
+        background: resolve(__dirname, 'src/background/service-worker.ts'),
+        content: resolve(__dirname, 'src/content/content.ts'),
+      };
+
+const shouldEmptyOutDir = buildEntry !== 'content';
+const isFinalPass = buildEntry !== 'background';
+
 export default defineConfig({
   build: {
     outDir: 'dist',
-    emptyOutDir: true,
+    emptyOutDir: shouldEmptyOutDir,
     rollupOptions: {
-      input: {
-        background: resolve(__dirname, 'src/background/service-worker.ts'),
-        content: resolve(__dirname, 'src/content/content.ts'),
-      },
+      input: inputs,
       output: {
         entryFileNames: '[name]/[name].js',
         chunkFileNames: '[name].js',
@@ -25,6 +37,7 @@ export default defineConfig({
     {
       name: 'copy-manifest',
       closeBundle() {
+        if (!isFinalPass) return;
         try {
           copyFileSync(
             resolve(__dirname, `src/manifest.${browser}.json`),
@@ -39,6 +52,7 @@ export default defineConfig({
     {
       name: 'create-zip',
       closeBundle() {
+        if (!isFinalPass) return;
         if (process.env.NODE_ENV === 'production' || !process.argv.includes('--watch')) {
           try {
             const zip = new AdmZip();