[FireFox]How do I customize Colors/ect?

I just got firefox, and let me tell you, its 100% better than IE, it's faster, neater, ect. And I was wondering how I can customize the colors up at the top toolbar(s) kthx bai ^^^^

Tools -> Add-Ons -> Themes -> Get Themes

You seem to ask a lot of questions that can be found by either looking around or using google :o

Thanks Flawz.