As of July 2012, Thunderbird has transitioned to a new governance model, with new features being developed by the broader free software and open source community, and security fixes and improvements handled by Mozilla.
Thunderbird is a free, open-source, cross-platform e-mail and news client developed by the Mozilla Foundation. The project strategy is modeled after Mozilla Firefox, a project aimed at creating a Web browser.
- [Changed] Hardware acceleration is now disabled by default to avoid crashing Thunderbird
- [Fixed] A few bugs have been fixed to avoid crashing Thunderbird
- [Unresolved] The "maildir" storage type can no longer be set through the UI due to various issues. Power users can still set the storage type using the config editor.
- OS X 10.6 or later