Examine source code of AV Price Converter

{
  "manifest_version": 3,
  "name": "AV Price Converter",
  "version": "1.0",
  "description": "Converts av.by prices to USD",
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://cars.av.by/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "av-price-converter@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "action": {
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://cars.av.by/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ]
}