After automatically upgrading to the latest Firefox version, the fonts.com web fonts at my site have stopped working. Quite annoying!
I guess that you really cannot expect a 3rd party plugin to work 100% with new browser updates. Still, this is not a problem at all in IE, Chrome, Safari, or Opera, where the fonts display as they should.
Sadly, this issue is yet another annoyance in the downhill tale of Firefox. It’s slower than before, pushing out updates, asking me again again about updating my plugins etc. etc…and now this.
Chrome has never felt closer to be my default browser.