Examine source code of Google Maps Plus

{
  "name": "Google Maps Plus",
  "version": "3",
  "icons": {
    "24": "24.png",
    "128": "128.png"
  },
  "app": {
    "urls": [
      "http://maps.google.com/"
    ],
    "launch": {
      "web_url": "http://maps.google.com/"
    }
  },
  "permissions": [
    "geolocation"
  ],
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{0fe36ccc-3366-4adb-a052-4c0e92b59385}"
    }
  }
}