Modifying the Web is one of those things you always dreamed would happen, but always seems to fall a little short. The Platypus Firefox extension is one of those tools that gives you the ability to modify any Web site from your browser. You can then turn around and save those changes for [...]

I found this little jewel via Lifehacker:
The one Firefox 2 feature that hasn’t grown on me is tab scrolling - left and right arrow buttons that appear at either end of the tab bar when you’ve opened up too many tabs to view at once.
+ Read More About Modifying the Tab Scrolling in Firefox 2!