Huskey, Paul was correct, @font-face is an element of CSS3! Basically it's only technically a recent "innovation" outside of Internet Explorer (who started the trend), so no... old versions of Mozilla won't support it, neither will old versions of Safari (etc). What you should always do when using font-face (no matter the browser) is have a fall-back mechanism in case someone cripples such functionality (never rely on bleeding edge stuff). This is where you use font-family and stacks. Honestly I don't know why your bothering with the old versions of gecko, very few people use them, almost everyone outside of IE upgrades their browser regularly. As for falling back onto using sFIR, why bother? not many people will see the effect and that will easily fail if they don't have scripting or flash enabled.