Examine source code of Let me search

{
  "name": "__MSG_appName__",
  "version": "0.0.3resigned1",
  "manifest_version": 2,
  "description": "__MSG_appDescription__",
  "icons": {
    "128": "images/icon-128.png"
  },
  "default_locale": "en",
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  },
  "permissions": [
    "https://s.2.taobao.com/*",
    "https://2.taobao.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://s.2.taobao.com/*",
        "https://2.taobao.com/*"
      ],
      "js": [
        "scripts/contentscript.js"
      ],
      "run_at": "document_end",
      "all_frames": false
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4831c721-e414-4002-8704-3e52931eab8a}"
    }
  }
}