Examine source code of Google Drive Utility V2

{
  "manifest_version": 2,
  "name": "Google Drive Utility V2",
  "version": "1.3",
  "description": "A utility for Google Drive.",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "32": "icons/logo_32.png",
      "64": "icons/logo_64.png",
      "128": "icons/logo_128.png"
    }
  },
  "icons": {
    "32": "icons/logo_32.png",
    "64": "icons/logo_64.png",
    "128": "icons/logo_128.png"
  },
  "oauth2": {
    "client_id": "YOUR_CLIENT_ID.apps.googleusercontent.com",
    "scopes": [
      "https://www.googleapis.com/auth/drive.file",
      "https://www.googleapis.com/auth/drive.metadata.readonly"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{772d8d0c-cc64-45e2-8243-a008c32cbf70}"
    }
  }
}