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Firefox 4 RC

Solution
Go to the Firefox menu, Options and select the Content tab. From there you'll see Fonts and Colors. Click the Advanced button to see if that is what you are looking for.

I never mess with that, but always download the Tab Mix Plus add-on which gives you a crazy amount of customizable options for tab appearance.
Go to the Firefox menu, Options and select the Content tab. From there you'll see Fonts and Colors. Click the Advanced button to see if that is what you are looking for.

I never mess with that, but always download the Tab Mix Plus add-on which gives you a crazy amount of customizable options for tab appearance.
 
Solution