OpenStreetBrowser/manifest.json

{
    "short_name": "OpenStreetBrowser",
    "name": "OpenStreetBrowser",
    "start_url": ".",
    "background_color": "#ffffff",
    "display": "browser",
    "icons": [
        {
            "src": "img/osb-192.png",
            "type": "image/png",
            "sizes": "192x192"
        }
    ]
}