I\'m a webmaster at http://www.beperk.com (I\'m giving you the URL so you are able to check the problem) and I\'m having lots of problems using @font-face in CSS.
If anyone are using local resource and facing this problem in firefox. You can go to about:config and change the security.fileuri.strict_origin_policy preference to false.
see : https://developer.mozilla.org/en-US/docs/Same-origin_policy_for_file:_URIs