Favicons are snitches.
Now that all modern browsers support SVG favicons, here’s how to turn any emoji into a favicon.svg:
<svg xmlns="http://w3.org/2000/svg" viewBox="0 0 100 100"> <text y=".9em" font-size="90"> 💩 </text> </svg>
Useful for quick apps when you can’t be bothered to design a favicon!
Clever! By exploiting the redirect pattern that most social networks use for logging in, and assuming that site’s favicon isn’t stored in a CDN, it’s possible to figure out whether someone is logged into that site.
A handy RESTful interface for retrieving favicons as images.
A great little tool for creating favicons.