Examine source code of Custom Search Menu

{
  "manifest_version": 3,
  "name": "Custom Search Menu",
  "version": "1.0.3",
  "description": "Add custom search engines to context menu",
  "default_locale": "en",
  "permissions": [
    "storage",
    "contextMenus",
    "clipboardWrite"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "icons": {
    "48": "icons/icon48.png",
    "96": "icons/icon96.png",
    "128": "icons/icon128.png"
  },
  "action": {},
  "browser_specific_settings": {
    "gecko": {
      "id": "custom-search-menu@barricachlorissinica.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}