diff --git a/background.js b/background.js
index 1d2cd5d..f440d30 100644
--- a/background.js
+++ b/background.js
@@ -2,35 +2,41 @@
 console.clear()
 console.log("[小墨助手]", "Service Worker init success.")
 
-/**
- * 右键菜单
- */
-chrome.contextMenus.create({
-  id: 'bitdance',
-  title: '小墨助手'
-})
 
-chrome.contextMenus.create({
-  id: 'bitdance-advanced-search',
-  title: '高级搜索',
-  parentId: 'bitdance',
-  // onclick: function (info) {
-  // }
-})
-chrome.contextMenus.onClicked.addListener(function (info) {
-  console.log('当前菜单信息:' + JSON.stringify(info))
-  console.log("[小墨助手]", "高级搜索 已点击菜单")
-})
 
 
 // Events must be registered synchronously from the start of the page.
 chrome.runtime.onInstalled.addListener(() => {
   console.log("[小墨助手]", "chrome.runtime.onInstalled.")
+
+  // In Chrome, you should create the context menu just once after install/update.
+  // refer: https://stackoverflow.com/questions/64318529/cannot-create-item-with-duplicate-context-menu-id-in-extension
+
+  /**
+   * 右键菜单
+   */
+  chrome.contextMenus.create({
+    id: 'bitdance',
+    title: '小墨助手'
+  })
+
+  chrome.contextMenus.create({
+    id: 'bitdance-advanced-search',
+    title: '高级搜索',
+    parentId: 'bitdance',
+    // onclick: function (info) {
+    // }
+  })
+  chrome.contextMenus.onClicked.addListener(function (info) {
+    console.log('当前菜单信息:' + JSON.stringify(info))
+    console.log("[小墨助手]", "高级搜索 已点击菜单")
+  })
+
   chrome.contextMenus.create({
     "id": "sampleContextMenu",
     "title": "Sample Context Menu",
     "contexts": ["selection"]
-  });
+  })
 });
 
 //
diff --git a/generate-manifest.js b/generate-manifest.js
index 6b3a997..5f0f437 100644
--- a/generate-manifest.js
+++ b/generate-manifest.js
@@ -56,7 +56,6 @@ var manifest = {
     // "automation": {},
 
     "background": {
-        // "service_worker": "scripts/service_worker/background.js"
         "service_worker": "background.js"
     },