extension work

content-scripts/manifest.json

@@ -15,6 +15,11 @@
       "matches": ["https://mdn.github.io/webextensions-examples/"],
       "js": ["content-script.js"]
     }
-  ]
+  ],
+  
+  "browser_action": {
+    "default_icon": "button/action.png",
+    "default_popup": "popup/choose_action.html"
+  }
 
 }