Simon Willison’s Weblog

26th October 2017 - Link Blog

Dynamically changing favicons with JavaScript. I just spotted GitHub using this trick to swap out the favicon on a pull request that hadn’t passed its tests yet for github.com/favicon-failure.ico with a little cross icon in the corner.

Posted 26th October 2017 at 7:56 pm

Recent articles

OpenAI’s accidental cyberattack against Hugging Face is science fiction that happened - 22nd July 2026
A Fireside Chat with Cat and Thariq from the Claude Code team - 21st July 2026
Kimi K3, and what we can still learn from the pelican benchmark - 16th July 2026

This is a link post by Simon Willison, posted on 26th October 2017.

Monthly briefing

Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.

Pay me to send you less!

Sponsor & subscribe