Examine source code of Super Search

{
  "manifest_version": 2,
  "name": "Super Search",
  "description": "Search the selected text from any of the listed search engines.",
  "version": "1.1resigned1",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "permissions": [
    "contextMenus",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c81ef27a-3dc4-483f-ae30-bfda009d7f3b}"
    }
  }
}