Examine source code of ZOKEA - Extensión de navegador

{
  "name": "ZOKEA, para compradores inteligentes",
  "version": "1.0.1",
  "description": "Envía productos a tu app ZOKEA directamente desde el navegador",
  "manifest_version": 2,
  "content_security_policy": "script-src 'self' https://www.gstatic.com/ https://*.firebaseio.com https://www.googleapis.com https://*.bootstrapcdn.com https://cdnjs.cloudflare.com https://cdn.firebase.com https://*.firebaseio.com https://*.firebaseio-demo.com 'popup.js'; object-src 'self'",
  "background": {
    "page": "background.html",
    "persistent": true
  },
  "browser_action": {
    "browser_style": true,
    "default_popup": "popup.html",
    "default_icon": {
      "16": "images/logo_zokea16.png",
      "32": "images/logo_zokea32.png",
      "48": "images/logo_zokea48.png",
      "128": "images/logo_zokea128.png"
    }
  },
  "icons": {
    "16": "images/ic_zokea16.png",
    "32": "images/ic_zokea32.png",
    "48": "images/ic_zokea48.png",
    "128": "images/ic_zokea128.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "notifications",
    "*://www.yambalu.com/*",
    "https://www.googleapis.com/*"
  ]
}