Download Mozilla Thunderbird 3.3 alpha 2

The Mozilla Foundation has released the second alpha release of Miramar, which is Thunderbird version 3.3. Mozilla Thunderbird is an open source mail and newsgroup client with features such as support for various mail and news accounts, a junk mail filter, spell checker and a customizable appearance. Version 3.3 is based on version 2.0 of the Gecko layout engine and also includes a new add-on and extension manager, now also indicates the size of attachments and is more compatible with the Windows Vista and Windows 7 user interface. The release notes for this version can be found below.

What’s New in Miramar Alpha 2

Miramar Alpha 2 is built on top of the Gecko 2.0 platform. The main goals of this release is to find out about possible problems caused by the changes in the underlying platform.

Notable changes in Miramar Alpha 2 from Miramar Alpha 1

• New Troubleshooting information page to aid supporting and diagnosing problems in Thunderbird
• Notifications of add-on installation progress and issues now work correctly
• Attachment reminder now works again
• Attachment sizes are now available in the compose window
• and numerous other bug fixes

Notable changes in Miramar Alpha 2 when compared to Thunderbird 3.1

• New Addons Manager and extension management API (user interface will be changed before final release)
• Attachment sizes now displayed along with attachments
• Several user interface fixes for Windows Vista/Windows 7
• Support for Mac 32/64 bit Universal builds (<$?=$release_fullname?> will no longer support PowerPC on Mac)
• Over 280 platform fixes to improve performance and stability

For a more detailed list of bug fixes, see the the full bug list.