Mozilla Messaging has completed the merge of Thunderbird 12 to the Early Bird developmental channel. Existing Earlybird user may be able to update within the application via Help > About Earlybird (at press time the updater was not working) otherwise you can manually download and install Earlybird from here. Thunderbird 12 is scheduled for release on April 23, 2012. Lightning Users: You will need to manually update to Lightning 1.4b1 via the Calendar Versions site.

Mozilla Messaging has completed the merge of Thunderbird 11 to the Beta channel. What’s new in Thunderbird 11 Beta: Tabs are now shown above the toolbar New wizard to sign up for new accounts More trust options added to junk settings (Bogofilter, DSPAM, POPFile) and several other platform fixes Existing Thunderbird Beta users should be able to update from within Thunderbird via Help > About Thunderbird. Otherwise users can download Thunderbird Beta 11 and manually update here. Lightning Users: You will need to manually update Lightning to 1.3b1 which can be obtained from the Calendar Versions site. Thunderbird 11 is…

Mozilla has completed the merge of Firefox 12 on to the Aurora developmental channel on February 3, 2012. What’s New in Firefox Aurora: Firefox Aurora Notes for Windows, Mac, Linux For Developers: Firefox Aurora Hacks Firefox 12 is scheduled for release on April 24, 2012. You can test out Firefox 12 Aurora from here. Existing Aurora users should be able to update from within Aurora via Help > About Aurora.