Examine source code of XPF to GMD

{
  "manifest_version": 3,
  "name": "XPF to GMD",
  "version": "1.0",
  "description": "Convert CFP Franc to Gambian Dalasi",
  "browser_specific_settings": {
    "gecko": {
      "id": "xpf-to-gmd@example.com"
    }
  }
}