Utilizas Mozilla Firefox
Cita: Fuente Edito:
I think this is a security restriction in Firefox.
If you have a page at file:///<somewhere>/pages/mypage.html, then you can only load fonts located in file:///<somewhere>/pages or below. So, for example, if the fonts are in file:///<somewhere>/fonts, they won't load, but if they are in file:///<somewhere>pages/fonts, then they should work. At least, that's how it seems to work for me.
veo que lo has probado con chrome
También puedes probar de ponerle la url de la fuente absoluta, es decir, desde la raíz.