Firefox 5 only came out a short while ago and Mozilla are not slowing down. Firefox 6 final is now available for download on Mac, Windows and Linux via Mozilla FTP servers. It's not available "officially", but will be available anytime next week. Firefox 6 does not introduce any UI changes, but the new version of Mozilla's ever-so-popular web browser does include some speed improvements while using the browser, almost 20% faster in some cases verses Firefox 5.
As always, because this isn't the "official" release, the final build may be updated before it gets released to the public next week. The welcome page does still say "Firefox 6 Beta" but don't let this stop you, Mozilla just hasn't updated the page yet. Go forth and grab Firefox 6! If you'd like to get your download on, I've linked to the 3 flavours of Firefox 6 below.