Some nice themes for Mac OSX Firefox to help it blend in better with Mac OSX. I’m using GrApple (Eos).
Pity they can’t help Firefox to behave more like a Mac OSX app. I’m constantly switching between Camino and Firefox under OSX to try to see which fits in better with my browsing habits. Camino is more like a Mac OSX app should be but doesn’t have all the useful extensions of Firefox.