manifest.webmanifest
{
  "icons": [
    { "src": "favicon-16x16.png", "type": "image/png", "sizes": "16x16" },
    { "src": "favicon-32x32.png", "type": "image/png", "sizes": "32x32" },
    { "src": "favicon-96x96.png", "type": "image/png", "sizes": "96x96" },
    { "src": "favicon-128x128.png", "type": "image/png", "sizes": "128x128" },
    { "src": "favicon-196x196.png", "type": "image/png", "sizes": "196x196" },
    ]
}