Mozilla Firefox是一个自由的，开放源码的浏览器，适用于Windows, Linux 和 MacOS X平台。它还有其它一些高级特征，如标签式浏览，可以禁止弹出式窗口。内置了钓鱼保护、改变标签浏览行为、能够重新打开以外关闭的标签、更好的支持网页订阅的预览和订阅、拼写检查、支持JavaScript等。
最新发布Mozilla Firefox 3.0.5和2.0.0.19版本，具体信息如下：
Firefox 3.0.5 fixes several issues found in Firefox 3.0.4:
* Fixed several security issues.
* Fixed several stability issues.
* Replaced the End-User License Agreement with a new "Know Your Rights" info bar on initial install.
* When installing multiple signed XPIs simultaneously, previous versions of Firefox would fail.
* Fixed several issues found in the accessibility implementation.
* Added the ability to send OS-specific system notes in the crash reporter.
*
* See the Firefox 3.0.4 release notes for changes in previous releases.
下载: Mozilla Firefox v2.0.0.20
下载: Mozilla Firefox v3.0.5
下载页面: Mozilla Firefox, Portable Edition 中文 (简体) 3.0.5