Utilizas
Mozilla Firefox?
Cita: 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.
Fuente Edito: veo que lo has probado con
chrome.
También puedes probar de ponerle la url de la fuente absoluta, es decir, desde la raíz.