In a somewhat odd move, Mozilla has released a preview release of Firefox 3.5 for beta users, dubbed b99.

Firefox 3.5b99 is a preview for the upcoming release candidate, which has been delayed a little in the wake of quality.

Besides bug fixes several fixes have landed, including some polishing work on the standard Firefox theme for Windows, Linux and Mac. The new Firefox icon hasn't landed yet, but I'm sure you'll forgive them and just enjoy testing this latest release, which is on a good track to become a good competitor on speed with Safari and Chrome, as well as introducing similar privacy browsing controls and ICC color profile support (on by default).

Beta users are encouraged to report on this preview, which is available simply through the automatic update system embedded in every release since long, long ago.