Do you have any extensions (Tools > Add-ons > Extensions) installed?

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes). See Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems and Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems

You can also try "Reset all user preferences to Firefox defaults" on the Safe mode start window - See http://kb.mozillazine.org/Resetting_preferences --- Do you see any difference if you copy and paste this code to the location bar and press the Enter key? Verdana should be wider than Arial. data:text/html,<font face="Arial">Arial:<br>abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ</font><br><br><font face="Verdana">Verdana:<br>abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ</font><br><br><font face="Courier New">Courier New:<br>abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ</font>

Thanks for your reply =) It doesnt seem the be the add ons... restoring defaults and running in safe mode didnt seem to make a difference. When I load the same pages on my Internet explorer browser they display the right fonts...

I see that I got the data code in my above post mixed up by forgetting to HTML escape the < tags. I corrected the code.

Can you test if that shows three different fonts if you paste that code in the location bar?

Nuthin... =(

Do all three fonts look the same?

You have checked? Tools > Options > Content : Fonts & Colors: Advanced > [[X]"Allow pages to choose their own fonts, instead of my selections above"

http://kb.mozillazine.org/Issues_related_to_fonts http://kb.mozillazine.org/Websites_look_wrong

The fonts all look different when I type the code above...

Some of the fonts on pages load properly...

When I use HTML in my blog for example it just shows up as the "default" font rather than the (for example). It all shows up properly on IE...

I have "allow pages to choose their own fonts rather than my selections above" checked... It doesnt seem to change anything whether or not its checked, but I do keep it checked.

Thank you again so much for your help =)