Simon Willison’s Weblog

Greasemonkey: Hacking the Web with JavaScript. Greasemonkey rocks! Here’s a simple tutorial from Michael Moncur.

Posted 8th January 2005 at 12:38 pm

Recent articles

Phoenix.new is Fly's entry into the prompt-driven app development space - 23rd June 2025
Trying out the new Gemini 2.5 model family - 17th June 2025
The lethal trifecta for AI agents: private data, untrusted content, and external communication - 16th June 2025

greasemonkey 54 javascript 713 michael-moncur 1 tutorial 18

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