mozdev.org – platypus: index: Holy cats — Greasemonkey is going to change the Web forever. This plugin works with the latest version of Greasemonkey, to let you change pages visually, then save the results as a Greasemonkey script.
Platypus is a Firefox extension which lets you modify a Web page from your browser — “What You See Is What You Get” — and then save those changes as a Greasemonkey script so that they’ll be repeated the next time you visit the page.
I’ve tried it. It’s insane. The results may not be perfect, but it does a great job of stubbing out a Greasemonkey user script to be refined further by hand. If nothing else, it gives you an example of how to do something so you can reverse engineer various effects and become even more of a Greasemonkey ninja.
(Posting about it had the added bonus of forcing me to learn how to spell “Platypus.”)