Importing Fonts (Again?)

I am having problems having a font show up in FireFox, though I am not certain if the problem is with FF, WP or both together.

Just as a review, what is the proper procedure for importing or referencing files? Are relative paths just not supported in WP?

For example, if I am importing font file formats from a stylesheet I would have to to add absolute paths:

@font-face {
    font-family: 'bebas_neueregular';
    src: url('bebasneue-webfont.eot');
    src: url('bebasneue-webfont.eot?#iefix') format('embedded-opentype'),
         url('bebasneue-webfont.woff') format('woff'),
         url('bebasneue-webfont.ttf') format('truetype'),
         url('bebasneue-webfont.svg#bebas_neueregular') format('svg');
    font-weight: normal;
    font-style: normal;

}