Contacted after the meeting, Mozilla engineering chief Mike Beltzner said there is no "declared" slip for the schedule of Firefox 3.1 beta 3 but acknowledged the concerns raised by the developer. "If that estimate puts the code freeze date at risk, we'll make the appropriate announcements in the Mozilla developer planning newsgroups," Beltzner told this ZDNet blogger.
Beta 3 is scheduled for release on January 26.
Beta 2 -- with private browsing included -- was delivered on December 8. The Mozilla team opted to go to a Beta 3 beta cycle rather than a release candidate last month to ensure that users had enough time to test this new feature.
According to Firefox team estimates, there are currently about 300,000 beta testers of Beta 2.