Examine source code of Domain IP Guard

{
  "manifest_version": 3,
  "name": "Domain IP Guard",
  "version": "1.1.1",
  "description": "Allows a chosen website only from an approved IP address",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage"
  ],
  "host_permissions": [
    "https://api.ipify.org/*",
    "https://api.myip.com/*",
    "https://ifconfig.me/*",
    "https://icanhazip.com/*"
  ],
  "optional_host_permissions": [
    "*://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "service_worker": "background.js"
  },
  "options_ui": {
    "page": "options.html"
  },
  "icons": {
    "48": "icons/48.png",
    "96": "icons/96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "domain-ip-guard@example.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "locationInfo"
        ]
      }
    }
  }
}