Examine source code of KIZ VPN

{
  "manifest_version" : 2 ,
  "name" : "KIZ VPN",
  "version" : "1.0.1",
  "description" : "VPN-прокси для браузера. Защитите свой трафик.",
  "permissions" : [
    "proxy" ,
    "storage" ,
    "webRequest" ,
    "webRequestBlocking" ,
    "<all_urls>" 
  ],
  "browser_action" : {
    "default_popup" : "popup.html",
    "default_icon" : {
      "16" : "icons/icon16.png",
      "48" : "icons/icon48.png",
      "128" : "icons/icon128.png"
    }
  },
  "background" : {
    "scripts" : [
      "background.js" 
    ]
  },
  "icons" : {
    "16" : "icons/icon16.png",
    "48" : "icons/icon48.png",
    "128" : "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "kizvpn@exlu51ve.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}