TIL server side image maps: https://developer.mozilla.org/en-US/docs/Web/API/HTMLImageEl...

Supported since forever.

https://ibiblio-icon-archive.danq.dev/icons/1.html

It'd be nice to have some way to browse the pages without constantly hunting for the Next button.

I agree but there is https://github.com/Dan-Q/ibiblio-icon-archive/tree/main/icon... and then you can put a . (or a .gif) in your OS search box

... of course.

https://www.ibiblio.org/gio/iconbrowser/icons/icons38.html

I really love that the source-extension icons are all different, and resemble the files contents - .c indentation, .h mostly linear, .s assembly instructions, ".o" bits