Examine source code of Panda Radio

{
  "name": "Panda Radio",
  "version": "1.7.0",
  "manifest_version": 2,
  "description": "Listen to over 50,000 world-wide online radio stations right in your browser",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_action": {
    "default_title": "Panda Radio",
    "default_popup": "index.html"
  },
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "oauth2": {
    "client_id": "379871332885-12ik8365v3fsrjdi7kq1rjmhl5s5jkfg.apps.googleusercontent.com",
    "scopes": [
      "openid",
      "https://www.googleapis.com/auth/userinfo.email",
      "https://www.googleapis.com/auth/userinfo.profile"
    ]
  },
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "permissions": [
    "https://pandaradioext.pythonanywhere.com/",
    "https://pandaradioext.pythonanywhere.com/api/*",
    "https://www.googleapis.com/auth/*",
    "<all_urls>"
  ]
}