Examine source code of CubDomain

{
  "manifest_version": 3,
  "name": "CubDomain",
  "version": "1.1.2",
  "description": "Discover comprehensive website information with CubDomain.com. Get details on IP address, server location, WHOIS data, DNS records.",
  "homepage_url": "https://www.cubdomain.com",
  "browser_specific_settings": {
    "gecko": {
      "id": "support@cubdomain.com",
      "strict_min_version": "109.0"
    }
  },
  "action": {
    "default_title": "Discover comprehensive website information with CubDomain.com",
    "default_popup": "popup/index.html",
    "default_icon": {
      "16": "img/favicon/16.png",
      "32": "img/favicon/32.png",
      "48": "img/favicon/48.png",
      "72": "img/favicon/72.png",
      "96": "img/favicon/96.png",
      "128": "img/favicon/128.png",
      "512": "img/favicon/512.png"
    }
  },
  "icons": {
    "16": "img/favicon/16.png",
    "32": "img/favicon/32.png",
    "48": "img/favicon/48.png",
    "72": "img/favicon/72.png",
    "96": "img/favicon/96.png",
    "128": "img/favicon/128.png",
    "512": "img/favicon/512.png"
  },
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+C",
        "chromeos": "Ctrl+Shift+C",
        "linux": "Ctrl+Shift+C",
        "mac": "Ctrl+Shift+C",
        "windows": "Ctrl+Shift+C"
      }
    }
  },
  "background": {
    "scripts": [
      "background/service_worker.min.js"
    ]
  },
  "permissions": [
    "tabs",
    "activeTab",
    "scripting",
    "alarms",
    "cookies",
    "webRequest"
  ],
  "host_permissions": [
    "http://*/*",
    "https://*/*"
  ]
}