Examine source code of Search with Bing

{
  "description": "Adds an option 'Search with Bing' in the context menu(right click menu), to search for highlighted text",
  "manifest_version": 2,
  "name": "Bing Search",
  "version": "0.2.0.4resigned1",
  "permissions": [
    "activeTab",
    "contextMenus"
  ],
  "icons": {
    "48": "icons/48.png",
    "96": "icons/96.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1d51fee7-d92a-4d3b-8177-ebf739ef2cde}"
    }
  }
}