Examine source code of Search on Baidu

{
  "manifest_version": 2,
  "name": "Search on Baidu",
  "version": "0.4resigned1",
  "description": "A menu option to search selected text on Baidu",
  "icons": {
    "128": "icons/baidu-128.png",
    "512": "icons/baidu-512.png"
  },
  "permissions": [
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "search.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d447b7df-d582-41f7-a83d-336dc61a1b08}"
    }
  }
}