Examine source code of Metrica

{
  "name": "Metrica",
  "version": "5.2.0",
  "description": "Check visits of any website",
  "manifest_version": 3,
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "metrica@metrica.guru",
      "strict_min_version": "109.0"
    }
  },
  "icons": {
    "16": "img/logo-16.png",
    "32": "img/logo-32.png",
    "48": "img/logo-48.png",
    "128": "img/logo-128.png"
  },
  "permissions": [
    "activeTab",
    "cookies"
  ],
  "host_permissions": [
    "https://pro.metrica.guru/*"
  ],
  "action": {
    "default_popup": "popup.html"
  }
}