https://eligrey.com/blog/favioli/
>Favioli was originally inspired by two things. The first thing that spurred the idea was Eli Grey’s personal site and its use of javascript to make a randomized emoji favicon. The favicon of his site is a different emoji each time that persists within a session. It’s pretty creative and fun! This was the creative inspiration.
>The practical inspiration for Favioli came from my day job. We have a lot of internal tools and sites, and they tend to either not have favicons, or have the standard Sony logo. For me this was a bit of a pain, because I love to pin my tabs. I couldn’t tell these sites apart.
>I could use a Chrome extension that lets me set custom favicons, but then I’d have to go through and specify each one. If I were to use emojis, I wouldn’t have to deal with finding art for each individual site, and I could make something that could automatically make all of these pages recognizable at a glance.