Wired’s list of Firefox Hacks (and something I learned today)
Wired has YAFEA (yet another Firefox extensions article) detailing the “Hacks you must have”. I keep my list of installed extensions here, using the excellent InfoLister add in.
In other news, I learned today that you can actually have multiple levels of tabs in Firefox. I’m not sure whether I’m more excited about the functionality, or saddened that I actually have that many things to read 
