In addition to new features such as support for HTML 5, geo-location, and a noticeably faster engine, Firefox 3.5 added a new CSS rule that makes Web typography much more attractive.

@font-face is a CSS rule that allows Web designers to reference fonts not installed on end-user machines. Just as you would have a pointer to a server-based stylesheet or JavaScript file in your Web page code, you can now make reference to a hosted typeface.

You'll note that news sites such as CNET News and NYTimes.com are optimized to make Web type more readable and as stylish as possible, but there are many design possibilities via additional downloadable typefaces. (As with any linked asset, there is some level of security risk if a hacker gets their hands on the font file.)

Mozilla's John Daggett explains:
Within a stylesheet, each @font-face rule defines a family name to be used, the font resource to be loaded, and the style characteristics of a given face such as whether it's bold or italic. Firefox 3.5 only downloads the fonts as needed, so a stylesheet can list a whole