Mozilla Thunderbird 3.0 Final has been released!

In addition to the feature set found in Mozilla Mail, Mozilla Thunderbird has several new features and improvements to make your mail and new experience better. Highlights include:

- The ability to customize your toolbars the way you want them. Choose View / Toolbars / Customize inside any window.
- UI extensions can be added to Mozilla Thunderbird to customize your experience with specific features and enhancements that you need. Support for extensions.
- Extensions allow you to add features particular to your needs such as offline mail support. A full list of available extensions can be found here.
- A new look and feel. Thunderbird also supports a large number of downloadable themes which alter the appearance of the client.
- An addressing sidebar for mail compose which makes it easy and convenient to add address book contacts to emails.
- Online help includes a FAQ, tips and tricks and other useful information.
- Simplified preferences UI and menus.
- Footprint and performance improvements.