Examine source code of YourFreeMaps

{
  "background": {
    "scripts": [
      "js/jquery-3.3.1.min.js",
      "background.js"
    ]
  },
  "chrome_url_overrides": {
    "newtab": "newtab/newtab.html"
  },
  "description": "YourtFreeMaps official website, find driving directions, maps, real-time traffic updates and traffic conditions and quick and easy search",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "manifest_version": 2,
  "name": "YourFreeMaps",
  "short_name": "YourFreeMaps",
  "permissions": [
    "tabs",
    "activeTab",
    "alarms",
    "storage",
    "contextMenus",
    "cookies",
    "management",
    "webNavigation",
    "https://yourfreemaps.com/",
    "webRequest"
  ],
  "version": "0.0.7",
  "web_accessible_resources": [
    "*.json"
  ]
}