Examine source code of Power Search Engine

{
  "manifest_version": 2,
  "name": "Power Search Engine",
  "description": "Search the selected text in other search engines in your machine",
  "version": "1.1resigned1",
  "icons": {
    "96": "icons/icon-96.png"
  },
  "permissions": [
    "search",
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{92a2caae-4a8a-4973-a3ad-7a14b181cbe3}"
    }
  }
}