Examine source code of Briefform

{
  "description": "Fügt der Symbolleiste ein Browser-Aktionssymbol zum Öffnen den Webseiten von Briefform.de hinzu",
  "manifest_version": 3,
  "name": "Briefform.de Briefe schreiben & beschriften",
  "version": "2.5",
  "homepage_url": "https://briefform.de/",
  "permissions": [
    "storage"
  ],
  "icons": {
    "48": "briefform-48x48.png"
  },
  "action": {
    "default_popup": "briefform-page.html",
    "default_icon": "briefform-32x32.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3bc08e0e-cafa-4fdb-be4e-e49e8efb688e}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}