Portable Firefox是一個可以在便攜USB驅動器上使用的全功能，充分優化過的Firefox。

通過一些經過專門選擇的優化，使的它執行更迅速，擴展你的便攜式USB驅動器的用途同時通過這個專門的工具，在更換電腦后，可以使你繼續使用大部分原有的收藏夾。通過CD驅動器（外置型），ZIP驅動器，外置硬盤，某些MP3播放器，閃存卡以及其它便攜設備也可以正常使用它。

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
官網：http://portableapps.com/apps/internet/firefox_portable

官方下載：http://downloads.sourceforge.net/portablefirefox/Firefox_Portable_2.0.0.11_en-us.paf.exe?download
簡體語言包：http://releases.mozilla.org/pub/mozilla.org/firefox/releases/2.0.0.11/win32/xpi/zh-CN.xpi