Ahh, yeah - black is the default, right?Speaking of which, Firefox 4 sucks for magnifing doesn't it? I can't find any menu options to zoom in and it doesn't even have a "reset to 100%" button. You gotta guess what 100% looks like for yourself.
Nonsense. Just hit ctrl and + to zoom in, ctrl plus - to zoom out, and ctrl and 0 resets back to 100%.