Since updating Firefox, just about every window I open uses a script font that is very small and unreadable -- why, and how can I get it to use normal fonts?

Question

I never had this issue before the last update I made. The font is a font on my computer and I thought that maybe it was the font and if I disabled it, the problem would go away. But sadly, it just picks another fancy script installed on my computer. It doesn't matter how many I disable, Firefox continually picks another fancy script to replace the ones I've disabled. What's odd is that some windows I open are almost entirely the fancy script and others may only have one line or a heading in the script. This is not an issue at all on Safari and was never a problem on Firefox until the next to last update I made.

Answer 1

You can do a check for corrupted and duplicate fonts and other font issues:
*http://www.thexlab.com/faqs/multipleappsquit.html - Font Book 2.0 Help: Checking for damaged fonts
*http://www.creativetechs.com/iq/garbled_fonts_troubleshooting_guide.html
You can do a font test to see if you can identify corrupted font(s).
*http://browserspy.dk/fonts-flash.php?detail=1
You can also try different default fonts.
* Firefox > Preferences > Content : Fonts & Colors > Advanced
*[ ] "Allow pages to choose their own fonts, instead of my selections above"