Examine source code of QR Continue

{
  "manifest_version": 3,
  "name": "QR Continue",
  "version": "1.0",
  "description": "Generates a QR Code linking to the current page.",
  "icons": {
    "48": "icons/qrcode-solid.svg"
  },
  "host_permissions": [
    "<all_urls>"
  ],
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "qrcontinue@omarashraf.dev"
    }
  },
  "action": {
    "default_icon": "icons/qrcode-solid.svg",
    "default_title": "QR Continue",
    "default_popup": "qr.html"
  }
}