Examine source code of Context Menu Search

{
  "manifest_version": 2,
  "name": "Search",
  "version": "1.1resigned1",
  "description": "Search App",
  "icons": {
    "48": "search.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "contextMenus",
    "tabs"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "searchscript.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{dc58186b-ca4a-49f8-9191-13597fdd71a0}"
    }
  }
}