Simon Willison’s Weblog

FireScope. Neat little Firefox / Firebug extension which adds a “Reference” tab showing documentation for the selected element from the comprehensive SitePoint Reference site.

Posted 5th February 2009 at 10:51 pm

Recent articles

A new way to extract detailed transcripts from Claude Code - 25th December 2025
Cooking with Claude - 23rd December 2025
Your job is to deliver code you have proven to work - 18th December 2025

css 230 documentation 54 extensions 5 firebug 22 firefox 90 firescope 1 html 94 reference 1 sitepoint 13

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