I keep getting multiple messages every time a web page is accessed or refreshed, that says "Font xxx is not installed. Do you want to allow Firefox to use it?". This happened after my last Firefox security update, and wasn't happening before that.
Keeps asking if I want allow the use of an "uninstalled" font for every page.
Every time Firefox opened
after last security update
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_3; en-us) AppleWebKit/531.22.7 (KHTML, like Gecko) Version/4.0.5 Safari/531.22.7
On which drive are those fonts located?
You can also try to clear the font cache.
http://forums.mozillazine.org/viewtopic.php?f=38&t=1461325 - snow leopard fonts (restart the font server)