Examine source code of DownloadSentry

{
  "manifest_version": 3,
  "name": "DownloadSentry",
  "version": "1.0.0",
  "description": "Audit download-link patterns and file delivery hints in anchors.",
  "icons": {
    "48": "shield/icon-48.png",
    "96": "shield/icon-96.png",
    "128": "shield/icon-128.png"
  },
  "action": {
    "default_title": "DownloadSentry",
    "default_popup": "dock/view.html",
    "default_icon": {
      "48": "shield/icon-48.png"
    }
  },
  "permissions": [
    "activeTab",
    "scripting",
    "clipboardWrite"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ed3ac8b2-03c7-45f8-9177-84d4511b5c06}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}