diff --git a/.gitignore b/.gitignore
index 1d5774d..229b967 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,7 +7,9 @@ yarn-error.log*
 # Build outputs
 dist/
 build/
+packages/
 *.zip
+*.xpi
 extension.zip
 
 # OS generated files
diff --git a/build.py b/build.py
index 8325ab3..2cab302 100644
--- a/build.py
+++ b/build.py
@@ -43,20 +43,22 @@ def copy_common_files(build_dir):
     Args:
         build_dir (Path): 目标构建目录
     """
-    common_files = [
-        "webext-compat.js",
-        "background.js",
-        "content.js",
-        "popup.js",
-        "popup.html",
-        "platforms.js",
+    # 创建 src 目录结构
+    src_dir = build_dir / "src"
+
+    # 复制源代码目录
+    if os.path.exists("src"):
+        shutil.copytree("src", src_dir, dirs_exist_ok=True)
+
+    # 复制根目录的文档文件
+    doc_files = [
         "LICENSE",
         "README.md",
         "PRIVACY_POLICY.md",
         "SECURITY.md",
     ]
 
-    for file in common_files:
+    for file in doc_files:
         if os.path.exists(file):
             shutil.copy2(file, build_dir)
 
@@ -81,8 +83,8 @@ def build_chrome():
     # 复制 Chrome manifest
     shutil.copy2("manifest.json", build_dir / "manifest.json")
 
-    # 修改 background.js 为 Chrome 优化
-    optimize_for_chrome(build_dir)
+    # 为 Chrome 创建扁平化的文件结构
+    flatten_for_browser(build_dir, "chrome")
 
     print(f"Chrome 版本构建完成: {build_dir}")
     return build_dir
@@ -104,13 +106,79 @@ def build_firefox():
     # 复制 Firefox manifest
     shutil.copy2("manifest-firefox.json", build_dir / "manifest.json")
 
-    # 优化文件以适配 Firefox
-    optimize_for_firefox(build_dir)
+    # 为 Firefox 创建扁平化的文件结构
+    flatten_for_browser(build_dir, "firefox")
 
     print(f"Firefox 版本构建完成: {build_dir}")
     return build_dir
 
 
+def flatten_for_browser(build_dir, platform):
+    """
+    将 src 目录中的文件扁平化到构建目录根
+
+    Args:
+        build_dir (Path): 构建目录路径
+        platform (str): 目标平台 (chrome/firefox)
+    """
+    src_dir = build_dir / "src"
+
+    if not src_dir.exists():
+        print(f"警告: {src_dir} 不存在")
+        return
+
+    # 将文件从 src 子目录移动到根目录
+    # background/index.js -> background.js
+    bg_file = src_dir / "background" / "index.js"
+    if bg_file.exists():
+        shutil.copy2(bg_file, build_dir / "background.js")
+
+    # content/index.js -> content.js
+    content_file = src_dir / "content" / "index.js"
+    if content_file.exists():
+        shutil.copy2(content_file, build_dir / "content.js")
+
+    # popup/index.html -> popup.html
+    popup_html = src_dir / "popup" / "index.html"
+    if popup_html.exists():
+        shutil.copy2(popup_html, build_dir / "popup.html")
+
+    # popup/popup.js -> popup.js
+    popup_js = src_dir / "popup" / "popup.js"
+    if popup_js.exists():
+        shutil.copy2(popup_js, build_dir / "popup.js")
+
+    # shared/platforms.js -> platforms.js
+    platforms_file = src_dir / "shared" / "platforms.js"
+    if platforms_file.exists():
+        shutil.copy2(platforms_file, build_dir / "platforms.js")
+
+    # shared/platform-detector.js -> platform-detector.js
+    detector_file = src_dir / "shared" / "platform-detector.js"
+    if detector_file.exists():
+        shutil.copy2(detector_file, build_dir / "platform-detector.js")
+
+    # shared/compat/webext-compat.js -> webext-compat.js
+    webext_compat = src_dir / "shared" / "compat" / "webext-compat.js"
+    if webext_compat.exists():
+        shutil.copy2(webext_compat, build_dir / "webext-compat.js")
+
+    # shared/compat/firefox-compat.js -> firefox-compat.js
+    firefox_compat = src_dir / "shared" / "compat" / "firefox-compat.js"
+    if firefox_compat.exists():
+        shutil.copy2(firefox_compat, build_dir / "firefox-compat.js")
+
+    # 删除 src 目录
+    if src_dir.exists():
+        shutil.rmtree(src_dir)
+
+    # 平台特定优化
+    if platform == "chrome":
+        optimize_for_chrome(build_dir)
+    elif platform == "firefox":
+        optimize_for_firefox(build_dir)
+
+
 def optimize_for_chrome(build_dir):
     """
     为 Chrome 优化文件
diff --git a/background.js b/src/background/index.js
similarity index 100%
rename from background.js
rename to src/background/index.js
diff --git a/content.js b/src/content/index.js
similarity index 100%
rename from content.js
rename to src/content/index.js
diff --git a/popup.html b/src/popup/index.html
similarity index 100%
rename from popup.html
rename to src/popup/index.html
diff --git a/popup.js b/src/popup/popup.js
similarity index 100%
rename from popup.js
rename to src/popup/popup.js
diff --git a/firefox-compat.js b/src/shared/compat/firefox-compat.js
similarity index 100%
rename from firefox-compat.js
rename to src/shared/compat/firefox-compat.js
diff --git a/webext-compat.js b/src/shared/compat/webext-compat.js
similarity index 74%
rename from webext-compat.js
rename to src/shared/compat/webext-compat.js
index ab362fc..3ac6735 100644
--- a/webext-compat.js
+++ b/src/shared/compat/webext-compat.js
@@ -23,7 +23,7 @@
 const detectBrowser = () => {
   const ua = navigator.userAgent;
   let manifest;
-  
+
   try {
     manifest = chrome.runtime.getManifest();
   } catch (error) {
@@ -101,7 +101,7 @@ const webext = (() => {
       runtime: { getManifest: () => ({ version: "0.0.0" }) },
       storage: { local: {}, sync: {} },
       tabs: {},
-      downloads: {}
+      downloads: {},
     };
   }
 
@@ -162,7 +162,10 @@ const webext = (() => {
             // sendMessage(message)
             runtimeAPI.sendMessage(args[0], (response) => {
               if (api.runtime.lastError) {
-                console.warn("SendMessage failed:", api.runtime.lastError.message);
+                console.warn(
+                  "SendMessage failed:",
+                  api.runtime.lastError.message
+                );
                 resolve(null);
               } else {
                 resolve(response);
@@ -170,15 +173,18 @@ const webext = (() => {
             });
           } else if (args.length === 2) {
             // 检查第二个参数是否是函数（回调）
-            if (typeof args[1] === 'function') {
+            if (typeof args[1] === "function") {
               // sendMessage(message, callback) - 直接调用回调，不使用 Promise
               runtimeAPI.sendMessage(args[0], args[1]);
               resolve(undefined); // 立即解析 Promise
-            } else if (typeof args[0] === 'string' && args[0].length > 10) {
+            } else if (typeof args[0] === "string" && args[0].length > 10) {
               // sendMessage(extensionId, message)
               runtimeAPI.sendMessage(args[0], args[1], (response) => {
                 if (api.runtime.lastError) {
-                  console.warn("SendMessage failed:", api.runtime.lastError.message);
+                  console.warn(
+                    "SendMessage failed:",
+                    api.runtime.lastError.message
+                  );
                   resolve(null);
                 } else {
                   resolve(response);
@@ -188,7 +194,10 @@ const webext = (() => {
               // sendMessage(message, options)
               runtimeAPI.sendMessage(args[0], args[1], (response) => {
                 if (api.runtime.lastError) {
-                  console.warn("SendMessage failed:", api.runtime.lastError.message);
+                  console.warn(
+                    "SendMessage failed:",
+                    api.runtime.lastError.message
+                  );
                   resolve(null);
                 } else {
                   resolve(response);
@@ -197,7 +206,7 @@ const webext = (() => {
             }
           } else if (args.length === 3) {
             // 检查第三个参数是否是函数（回调）
-            if (typeof args[2] === 'function') {
+            if (typeof args[2] === "function") {
               // sendMessage(extensionId, message, callback) 或 sendMessage(message, options, callback)
               runtimeAPI.sendMessage(args[0], args[1], args[2]);
               resolve(undefined); // 立即解析 Promise
@@ -205,14 +214,17 @@ const webext = (() => {
               // sendMessage(extensionId, message, options)
               runtimeAPI.sendMessage(args[0], args[1], args[2], (response) => {
                 if (api.runtime.lastError) {
-                  console.warn("SendMessage failed:", api.runtime.lastError.message);
+                  console.warn(
+                    "SendMessage failed:",
+                    api.runtime.lastError.message
+                  );
                   resolve(null);
                 } else {
                   resolve(response);
                 }
               });
             }
-          } else if (args.length === 4 && typeof args[3] === 'function') {
+          } else if (args.length === 4 && typeof args[3] === "function") {
             // sendMessage(extensionId, message, options, callback)
             runtimeAPI.sendMessage(args[0], args[1], args[2], args[3]);
             resolve(undefined); // 立即解析 Promise
@@ -244,7 +256,10 @@ const webext = (() => {
             // sendMessage(tabId, message)
             tabsAPI.sendMessage(tabId, message, (response) => {
               if (api.runtime.lastError) {
-                console.warn("Tabs sendMessage failed:", api.runtime.lastError.message);
+                console.warn(
+                  "Tabs sendMessage failed:",
+                  api.runtime.lastError.message
+                );
                 resolve(null);
               } else {
                 resolve(response);
@@ -254,7 +269,10 @@ const webext = (() => {
             // sendMessage(tabId, message, options)
             tabsAPI.sendMessage(tabId, message, options, (response) => {
               if (api.runtime.lastError) {
-                console.warn("Tabs sendMessage failed:", api.runtime.lastError.message);
+                console.warn(
+                  "Tabs sendMessage failed:",
+                  api.runtime.lastError.message
+                );
                 resolve(null);
               } else {
                 resolve(response);
@@ -285,33 +303,35 @@ const webext = (() => {
     },
 
     // Tabs API
-    tabs: api.tabs ? {
-      query: promisifyNoFail(api.tabs, "query", []),
-      get: promisifyNoFail(api.tabs, "get"),
-      create: promisifyNoFail(api.tabs, "create"),
-      update: promisifyNoFail(api.tabs, "update"),
-      remove: promisifyNoFail(api.tabs, "remove"),
-      sendMessage: createTabsSendMessage(api.tabs),
-      executeScript: promisifyNoFail(api.tabs, "executeScript"),
-      insertCSS: promisifyNoFail(api.tabs, "insertCSS"),
-      removeCSS: promisifyNoFail(api.tabs, "removeCSS"),
-      onUpdated: api.tabs.onUpdated,
-      onActivated: api.tabs.onActivated,
-      onRemoved: api.tabs.onRemoved,
-    } : {
-      query: async () => [],
-      get: async () => null,
-      create: async () => null,
-      update: async () => null,
-      remove: async () => null,
-      sendMessage: async () => null,
-      executeScript: async () => null,
-      insertCSS: async () => null,
-      removeCSS: async () => null,
-      onUpdated: { addListener: () => {}, removeListener: () => {} },
-      onActivated: { addListener: () => {}, removeListener: () => {} },
-      onRemoved: { addListener: () => {}, removeListener: () => {} },
-    },
+    tabs: api.tabs
+      ? {
+          query: promisifyNoFail(api.tabs, "query", []),
+          get: promisifyNoFail(api.tabs, "get"),
+          create: promisifyNoFail(api.tabs, "create"),
+          update: promisifyNoFail(api.tabs, "update"),
+          remove: promisifyNoFail(api.tabs, "remove"),
+          sendMessage: createTabsSendMessage(api.tabs),
+          executeScript: promisifyNoFail(api.tabs, "executeScript"),
+          insertCSS: promisifyNoFail(api.tabs, "insertCSS"),
+          removeCSS: promisifyNoFail(api.tabs, "removeCSS"),
+          onUpdated: api.tabs.onUpdated,
+          onActivated: api.tabs.onActivated,
+          onRemoved: api.tabs.onRemoved,
+        }
+      : {
+          query: async () => [],
+          get: async () => null,
+          create: async () => null,
+          update: async () => null,
+          remove: async () => null,
+          sendMessage: async () => null,
+          executeScript: async () => null,
+          insertCSS: async () => null,
+          removeCSS: async () => null,
+          onUpdated: { addListener: () => {}, removeListener: () => {} },
+          onActivated: { addListener: () => {}, removeListener: () => {} },
+          onRemoved: { addListener: () => {}, removeListener: () => {} },
+        },
 
     // Storage API
     storage: {
@@ -338,35 +358,43 @@ const webext = (() => {
     },
 
     // Downloads API
-    downloads: api.downloads ? {
-      download: promisifyNoFail(api.downloads, "download"),
-      search: promisifyNoFail(api.downloads, "search", []),
-      cancel: promisifyNoFail(api.downloads, "cancel"),
-      pause: promisifyNoFail(api.downloads, "pause"),
-      resume: promisifyNoFail(api.downloads, "resume"),
-      erase: promisifyNoFail(api.downloads, "erase"),
-      removeFile: promisifyNoFail(api.downloads, "removeFile"),
-      show: promisifyNoFail(api.downloads, "show"),
-      showDefaultFolder: promisifyNoFail(api.downloads, "showDefaultFolder"),
-      onCreated: api.downloads.onCreated,
-      onChanged: api.downloads.onChanged,
-      onErased: api.downloads.onErased,
-      onDeterminingFilename: api.downloads.onDeterminingFilename,
-    } : {
-      download: async () => null,
-      search: async () => [],
-      cancel: async () => null,
-      pause: async () => null,
-      resume: async () => null,
-      erase: async () => null,
-      removeFile: async () => null,
-      show: async () => null,
-      showDefaultFolder: async () => null,
-      onCreated: { addListener: () => {}, removeListener: () => {} },
-      onChanged: { addListener: () => {}, removeListener: () => {} },
-      onErased: { addListener: () => {}, removeListener: () => {} },
-      onDeterminingFilename: { addListener: () => {}, removeListener: () => {} },
-    },
+    downloads: api.downloads
+      ? {
+          download: promisifyNoFail(api.downloads, "download"),
+          search: promisifyNoFail(api.downloads, "search", []),
+          cancel: promisifyNoFail(api.downloads, "cancel"),
+          pause: promisifyNoFail(api.downloads, "pause"),
+          resume: promisifyNoFail(api.downloads, "resume"),
+          erase: promisifyNoFail(api.downloads, "erase"),
+          removeFile: promisifyNoFail(api.downloads, "removeFile"),
+          show: promisifyNoFail(api.downloads, "show"),
+          showDefaultFolder: promisifyNoFail(
+            api.downloads,
+            "showDefaultFolder"
+          ),
+          onCreated: api.downloads.onCreated,
+          onChanged: api.downloads.onChanged,
+          onErased: api.downloads.onErased,
+          onDeterminingFilename: api.downloads.onDeterminingFilename,
+        }
+      : {
+          download: async () => null,
+          search: async () => [],
+          cancel: async () => null,
+          pause: async () => null,
+          resume: async () => null,
+          erase: async () => null,
+          removeFile: async () => null,
+          show: async () => null,
+          showDefaultFolder: async () => null,
+          onCreated: { addListener: () => {}, removeListener: () => {} },
+          onChanged: { addListener: () => {}, removeListener: () => {} },
+          onErased: { addListener: () => {}, removeListener: () => {} },
+          onDeterminingFilename: {
+            addListener: () => {},
+            removeListener: () => {},
+          },
+        },
 
     // Browser Action / Action API (兼容不同版本)
     action: (() => {
@@ -435,7 +463,9 @@ if (typeof module !== "undefined" && module.exports) {
   // 服务工作器环境
   self.webext = webext;
   self.webextFlavor = webextFlavor;
-  console.log("WebExt compatibility layer loaded in service worker environment");
+  console.log(
+    "WebExt compatibility layer loaded in service worker environment"
+  );
 } else {
   // 全局环境
   this.webext = webext;
diff --git a/platform-detector.js b/src/shared/platform-detector.js
similarity index 100%
rename from platform-detector.js
rename to src/shared/platform-detector.js
diff --git a/platforms.js b/src/shared/platforms.js
similarity index 100%
rename from platforms.js
rename to src/shared/platforms.js