chromium/chrome/test/data/web_apps/unrestricted_usb_isolated_app/.well-known/manifest.webmanifest

{
  "name": "Unrestricted USB Isolated App",
  "version": "1.0.0",
  "id": "/",
  "scope": "/",
  "start_url": "/index.html",
  "display": "standalone",
  "permissions_policy": {
    "cross-origin-isolated": [ "*" ],
    "usb": [ "*" ],
    "usb-unrestricted": [ "*" ]
  },
  "icons": [
    {
      "src": "/256x256-green.png",
      "sizes": "256x256",
      "type": "image/png"
    }
  ]
}