Power-ups for your Firefox browser →
Greasemonkey is a plugin for the Firefox web browser. It allows you to change how your favorite pages behave and look. There are many scripts that have already been written, and if you know javascript you can easily create your own! Userscripts is a repository to download and install Greasemonkey scripts.
Some of my favorites:
Realtime Twitter Search Results on Google
Twitter Friends Bio at a Glance
A complete list of useful Greasemonkey scripts I’ve bookmarked can be found here
