How to get fonts loading cross domain in Firefox
Your webfont files are served in text/plain Content-Type instead of the proper one such as application/x-font-woff.
Try something like this in your apache config file see if it helps:
<Location /webfont> Header set Access-Control-Allow-Origin "*" AddType application/vnd.ms-fontobject .eot AddType application/x-font-ttf .ttf AddType application/x-font-woff .woff</Location>