Examine source code of apksclub.com

{
  "browser_action": {
    "default_icon": "img/logo.png",
    "default_popup": "html/popup.html",
    "default_title": "apksclub.com"
  },
  "description": "apksclub.com will give you free apks of android apps for easy installation on your android operating system.",
  "icons": {
    "16": "img/icon.png",
    "128": "img/logo.png"
  },
  "manifest_version": 2,
  "name": "apksclub.com",
  "version": "1.1"
}