A new alpha version, to be precise Alpha 8, of the upcoming Mozilla Firefox 3 browser has been released two days ago which introduced several new features such as a build in malware protection which can be tested on a publicly available test environment
on the Mozilla website
Add-ons have to use a secure method for auto-updating from now on which means that they either have to be delivered using SSL
signatures. The real progress can be seen when you look at the list of bugfixes from alpha 7 to the current version. More than 1100 bugs have been fixed in that time which is quite an achievement.
Several bugs prevail on the other hand. One for instance prevents that Firefox 3 is starting in Windows Vista
if parental controls are enabled. If you have been using prior alpha versions of Firefox 3 you should definitely download
the new one and replace the old alpha with it.
Firefox 3 Alpha 8 Bugfixes
Firefox 3 Download