How to Favicon in 2026: Three files that fit most needs—Martian Chronicles, Evil Martians’ team blog
https://evilmartians.com/chronicles/how-to-favicon-in-2021-six-files-that-fit-most-needs
For the browser using HTML:
<link rel="icon" href="/favicon.ico" sizes="32x32">
<link rel="icon" href="/icon.svg" type="image/svg+xml">
<link rel="apple-touch-icon" href="/apple-touch-icon.png"><!-- 180×180 -->
How To Use an Emoji as a Favicon Easily | CSS-Tricks - CSS-Tricks
https://css-tricks.com/emoji-as-a-favicon/
Lea Verou had a dang genius idea to use an emoji as a favicon. The idea only recently possible as browsers have started supporting SVG for favicons. Chuck an emoji inside an SVG <text> element and use that as the favicon.
How To Use an Emoji as a Favicon Easily | CSS-Tricks - CSS-Tricks
https://css-tricks.com/emoji-as-a-favicon
Lea Verou had a dang genius idea to use an emoji as a favicon. The idea only recently possible as browsers have started supporting SVG for favicons. Chuck an emoji inside an SVG element and use that as the favicon.
Google's undocumented favicon to png convertor
http://simonwillison.net/2008/Aug/30/favicons/
Google's undocumented favicon to png convertor (via) Showing the favicon of a domain next to a link is a really nice trick, but it’s slightly tricky to achieve as IE won’t display a .ico file if you link to it from an img element, so you need to convert the images server-side. This undocumented Google API does that for you, meaning it’s much easier to add favicons as a feature to your site.
Google's undocumented favicon to png convertor
http://simonwillison.net/2008/Aug/30/favicons
Google's undocumented favicon to png convertor (via) Showing the favicon of a domain next to a link is a really nice trick, but it’s slightly tricky to achieve as IE won’t display a .ico file if you link to it from an img element, so you need to convert the images server-side. This undocumented Google API does that for you, meaning it’s much easier to add favicons as a feature to your site.
Beck - Loser - SoundManager 2 Demo: Play MP3 links on a page, "page as playlist" style
http://schillmania.com/projects/soundmanager2/demo/page-player/xbm-test.html
"Experimental dynamic XBM test, favicon "VU meter""