manifest.json

{
  "short_name": "µStopwatch",
  "name": "µStopwatch: A simple and easy to use stopwatch",
  "description": "A simple and easy to use stopwatch",
  "icons": [
    {
      "src": "./img/icon-128.png",
      "type": "image/png",
      "sizes": "128x128"
    },
    {
      "src": "./img/icon-256.png",
      "type": "image/png",
      "sizes": "256x256"
    },
    {
      "src": "./img/icon-512.png",
      "type": "image/png",
      "sizes": "512x512"
    },
    {
      "src": "./img/icon.svg",
      "type": "image/svg+xml",
      "sizes": "150x150"
    }
  ],
  "background_color": "#F25200",
  "display": "standalone",
  "id": "./index.html",
  "start_url": "./index.html",
  "theme_color": "#F25200",
  "screenshots": [
    {
      "src": "./img/screenshot-1.png",
      "type": "image/png",
      "sizes": "321x511",
      "form_factor": "narrow"
    },
    {
      "src": "./img/screenshot-2.png",
      "type": "image/png",
      "sizes": "321x511",
      "form_factor": "narrow"
    }
  ]
}