Hey there kiddos,
I've been thinking lately that I should talk about my firefox setup, so I guess I'll put that right here.
A Very nice lightweight theme. Looks great on every OS except OS X. On OS X I just use the default.
This isn't as useful as FireBug, but I've had it around for so long, I still use it. One of the nice features lets you outline all block elements on a page, which is useful for seeing how strange css elements are interacting.
This gives you a few different options for taking pictures of web pages.
Makes downloading things so much less intrusive than the normal download tool, especially if you enable the mini-mode, which I highly recommend.
Like xmarks, which I used for years and still highly recommend, but syncs everything including your awesome bar, and lets you store it on a server of your own.
Blocks ads incredibly well.
I still use delicious a lot, and this lets me save things to it easily. I always just turn on classic mode, because all of their new features are pretty annoying.
Anyway, that's about it. I still really love Firefox, especially since 3.6 has made it so much faster. I'm running the 3.7 nightlies on my laptop, which I am enjoying as well. I have yet to figure out if I like firefox because of the way I have customized it or not, but it definitly wins points in my book for being so easy to customize.