软件简介
Mozilla 发布了 Thunderbird 5.0 的正式版。不过，从目前的官方下载网页上，还没有提供 5.0 简体中文包的下载，其他包括英文和繁体中文等都已有 5.0 版本下载。Thunderbird是一个支持 IMAP、POP3的邮件客户端工具，它提供了一个向导程序，能让你导入来自Outlook和Outlook Express的邮件和邮箱地址。
这是Thunderbird 18个月后第一次更新主流版本，带来了全新Gecko 5引擎，加入扩展管理器，提升了启动性能，加入可记忆标签，兼容Intel Mac系统，但停止了对PowerPC Mac的支持。
Thunderbird 5.0 正式版更新
* More responsive and faster to start up and use
* Thunderbird is based on the new Mozilla Gecko 5 engine
* New Add-ons Manager
* Revised account creation wizard to improve email setup
* New Troubleshooting Information page
* Tabs can now be reordered and dragged to different windows
* Attachment sizes now displayed along with attachments
* Plugins can now be loaded in RSS feeds by default
* There are several theme fixes for Windows Vista and Windows 7
* Support for Mac 32/64 bit Universal builds (Thunderbird no longer supports PowerPC on Mac)
* Over 390 platform fixes that improve speed, performance, stability and security