sapphire-frontend/manifest.json

{
    "short_name": "Sapphire",
    "name": "Sapphire",
    "description": "Aggregating, free/libre instant messaging client",
    "lang": "en-CA",
    "icons": [
        {
            "src": "jelly-32.png",
            "type": "image/png",
            "sizes": "32x32"
        },
        {
            "src": "jelly-48.png",
            "type": "image/png",
            "sizes": "48x48"
        },
        {
            "src": "jelly-144.png",
            "type": "image/png",
            "sizes": "144x144"
        }
    ],
    "start_url": "index.html",
    "display": "standalone",
    "background_color": "#2b2e39",
    "theme_color": "#2b2e39",
    "orientation": "portrait-primary",
    "scope": "/"
}