mimmi20/browser-detector

{
  "rules": {
    "/g100/i": "readboy g100",
    "/g50/i": "readboy g50",
    "/g35/i": "readboy g35",
    "/g30/i": "readboy g30",
    "/g20/i": "readboy g20",
    "/f300/i": "readboy f300"
  },
  "generic": "general readboy device"
}