I upgraded to Firefox 3.6 and found it supports "themes". I scanned thru a bunch of them and selected a winter ski mountain theme that put a soothing background behind the Firefox tool bar, menu bar and the rest of the screen hogging bars at the top of screen.
It looked kinda cool. Except it did something to the color of the text in the menubar making it harder to read.
So themes are gone now. And the menubar is readable again.