Examine source code of Asr

{
  "manifest_version": 2,
  "name": "Asr",
  "version": "0.1.3",
  "author": "Fusha Technologies",
  "description": "Replace new tab page with daily Islamic inspiration and guidance",
  "icons": {
    "16": "assets/img/icon-16.png",
    "48": "assets/img/icon-48.png",
    "128": "assets/img/icon-128.png"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "permissions": [
    "geolocation",
    "*://asr.firebaseio.com/*"
  ],
  "background": {
    "scripts": [
      "assets/js/production.min.js"
    ],
    "persistent": false
  },
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "offline_enabled": true
}