Favicon checklist

Based on EvilMartians' article

Add favicon.ico

<link rel="icon" href="/favicon.ico" sizes="32x32">

Add SVG icon with a light/dark version

<link rel="icon" href="/icon.svg" type="image/svg+xml">

Add 180×180 PNG image for Apple devices

<link rel="apple-touch-icon" href="apple-touch-icon.png">