Lifehacker posted their Top 10 Firefox Extensions today. I have used a few of those extensions, and especially like the Foxmarks bookmark synchronizer extension.
Another Firefox extension that I use a lot is the FaviconizeTab extension. It allows for your “favorite” tabs to be shrunk in size, only showing the icon for the site. I typically do this with my Gmail and Google Calendar tabs, so that I can fit more tabs that I need the text for on the tab bar.
