Rated 4 out of 5 stars
As a red-green colorblind person (like 7% of American men) this is the best theme that I’ve found for Firefox. It demonstrates that usability does not have to be unstylish.
However, some fonts remain red and non-highlighted icons appear grey. Invisible - in other words. To use this theme, I’ve memorized where the icons are supposed to appear.
Unfortunately, extension developers do not rely entirely on themes for their appearance (as they should in an ideal environment), so I am unable to force all text to be white on black. There are additionally a lot of places in the Firefox browser that I can't yet modify the appearance of completely. Hopefully the Firefox 4 release will find and fix many of these issues.