Web app Manifest file for Firefox

manifest.webmanifest

  {
    "short_name": "Web app short name",
    "name": "Web app name",
    "description": "Web app description",
    "start_url": ".",
    "display": "standalone",
    "background_color": "#aa00ff",
    "theme_color": "#76ff03",
    "lang": "en-GB",
    "icons": [
        {
          "src": "./favicon/favicon-16x16.png",
          "sizes": "16x16",
          "type": "image/png"
        },
        {
          "src": "./favicon/favicon-32x32.png",
          "sizes": "32x32",
          "type": "image/png"
        },
        {
          "src": "./favicon/favicon-64x64.png",
          "sizes": "64x64",
          "type": "image/png"
        },
        {
            "src": "./favicon/favicon-96x96.png",
            "type": "image/png",
            "sizes": "96x96"
        },
        {
            "src": "./favicon/favicon-192x192.png",
            "type": "image/png",
            "sizes": "192x192"
        },
        {
            "src": "./favicon/favicon-512x512.png",
            "type": "image/png",
            "sizes": "512x512"
        },
        {
          "src": "./favicon/maskable_icon.png",
          "sizes": "196x196",
          "type": "image/png",
          "purpose": "maskable"
        }
    ],
    "serviceworker": {
        "src": "sw.js"
    },
    "related_applications": [{
        "platform": "web",
        "url": "www.example.com"
    }]
}