I also had this problem and finally found the answer in this thread.
Suggestion: just make firefox-3/xulrunner use the gconf DPI settings. My screen has a DPI of 131 but I set it to 96 in the 'Apearance' preferences to avoid having huge fonts everywhere. I didn't know firefox had its own DPI settings.
I also had this problem and finally found the answer in this thread.
Suggestion: just make firefox-3/xulrunner use the gconf DPI settings. My screen has a DPI of 131 but I set it to 96 in the 'Apearance' preferences to avoid having huge fonts everywhere. I didn't know firefox had its own DPI settings.