What I did was to set the minimum size in the fonts selection in Mozilla itself.............I'm using Firebird (v0.7), but it should have something similar. I went to
Tools -> Options -> Web Features and hit the
Fonts & Colors button. In the popup window, there's different setting for the font styles and sizes, as well as the colors (including link colors)....................I set the minimum size to 10 and the normal size to 14 and I also have a screen res of 1024x768......
HTH
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I just opened up Mozilla (v1.4) and went to
Edit -> Preferences -> Appearance -> Fonts and found the settings for fonts sizes there. I also set the Monospace size to 11.........and if you have the rpm for the bitstream font. then just install the rpm. It should take care of the installation for you.