Examine source code of Avito fixer

{
  "manifest_version": 2,
  "name": "Avito fixer",
  "version": "2.0",
  "description": "Точно подсвечивает заказанные объявления с настраиваемым оформлением",
  "permissions": [
    "https://www.avito.ru/*",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.avito.ru/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_action": {
    "default_icon": "icons/icon-48.svg",
    "default_title": "Avito Fixer",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "avito-precise@local",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}