Examine source code of Extension Desk

{
  "manifest_version": 2,
  "name": "Extension Desk",
  "version": "1.0",
  "description": "Better way to organise",
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEApD0l4oL4VoU44+rGYOT4erlX9Y4mPOD8yKgbdIWvg2DqXBftTda2niS017lqFyNQ7lYKIdOpcqkxRSpxdNe0m/grr4+pCbj6sSWIR108RxPW4LfWworyrvhbCwU50j6R3/KNGv+580WE2y8+rLF58q20/fRfudZLoGx7ifeLssaTYOIspyesdi50jSaGXqtJlT2TDdDkgvYHE8+nt2YafT8EDO0RztmhXRWr7rS5v8gE+WfQCVImEmBXq+ZzpAqdPUftmR7KwY+ikTWHXBtSsfYHjp2IAExgYesk8xfpcyYmJDnN4vD1OL1U2FTCsfMHK9Oc4hMnwh+ta6nKk8kF0wIDAQAB",
  "icons": {
    "48": "img/border-48-5.png"
  },
  "background": {
    "persistent": false,
    "scripts": [
      "js/update.js"
    ]
  },
  "browser_action": {
    "default_icon": "img/extension_desk.png",
    "default_title": "Extension desk",
    "default_popup": "html/popup.html"
  },
  "web_accessible_resources": [
    "img/border-48-5.png"
  ],
  "permissions": [
    "activeTab",
    "tabs",
    "geolocation",
    "identity"
  ],
  "chrome_url_overrides": {
    "newtab": "html/home.html"
  },
  "content_security_policy": "script-src 'self' https://calendar.google.com; object-src 'self'",
  "oauth2": {
    "client_id": "98368131235-djf8rnuah2bc6gptp9520u4iv342r2nd.apps.googleusercontent.com",
    "scopes": [
      "https://www.googleapis.com/auth/calendar.readonly"
    ]
  }
}