No. 9: MidnightFox

If you're gonna go dark, do it with style. I'm usually not much of a fan of black-background Firefox themes, but MidnightFox is a rare exception. The colorful buttons look great on the textured black interface, but unfortunately it didn't work very well with All-in-One Sidebar, one of my favorite extensions. It still surprised me enough with its fancy look to make it on the list.