Portable Firefox是一个可以在便携USB驱动器上使用的全功能，充分优化过的Firefox。
通过一些经过专门选择的优化，使的它执行更迅速，扩展你的便携式USB驱动器的用途同时通过这个专门的工具，在更换电脑后，可以使你继续使用大部分原有的收藏夹。通过CD驱动器（外置型），ZIP驱动器，外置硬盘，某些MP3播放器，闪存卡以及其它便携设备也可以正常使用它。
Mozilla Firefox®, Portable Edition is the popular Mozilla Firefox web browser bundled with a PortableApps.com Launcher as a portable app, so you can take your bookmarks, extensions and saved passwords with you.
Mozilla Firefox is a fast, full-featured web browser that's easy to use. It has lots of great features including popup-blocking, tabbed-browsing, integrated search, improved privacy features, automatic updating and more. Plus, thanks to the PortableApps.com launcher bundled in the Mozilla Firefox, Portable Edition, it leaves no personal information behind on the machine you run it on, so you can take your favorite browser along with all your favorite bookmarks and extensions with you wherever you go
更新：http://portableapps.com/support/firefox_portable#version_history
官网：http://portableapps.com/apps/internet/firefox_portable
官方下载：http://downloads.sourceforge.net/portablefirefox/Firefox_Portable_2.0.0.11_en-us.paf.exe?download
简体语言包：http://releases.mozilla.org/pub/mozilla.org/firefox/releases/2.0.0.11/win32/xpi/zh-CN.xpi