Examine source code of Google Maps 2d

{
  "name": "Google Maps 2d",
  "description": "Always view google maps in 2d",
  "version": "1.0.1resigned1",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "48": "img/icon48.png"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "https://*/maps*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{5bca336c-515c-468c-b429-91182b9fc1a9}"
    }
  }
}