Examine source code of Wikipedia Fast Search

{
  "manifest_version": 3,
  "name": "Wikipedia Quick Search",
  "version": "1.0",
  "description": "Search Wikipedia directly from your toolbar popup.",
  "action": {
    "default_popup": "popup.html",
    "default_title": "Wikipedia Quick Search"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "wiki-quick-search@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}