Now this is a sweet azz Blix! =) Great job on it..
"I'd need to change the top graphic."
Hell yeah I would, as to this:
"Do you think the graphic would look too plain once I removed my logo and text? Do you like the icons or should I simple show a Mac blue desktop?"
No, I'd just make another image a "blank one" that kinda blends with the nav background imagery a little bit..maybe add a Firefox wallpaper image that has the same color texture to it. I have one that would look sweet in there.
But personally...I wouldn't release it. I know others might get mad at my last reply...but that "should be" your own really..and not for release.. But if you're going to be generous...that's cool too. =)