Portable Firefox is a fully functional solution of Firefox optimized for use on a USB key drive.

Portable Firefox has some specially-selected optimizations to make it perform faster and extend the life of your USB key as well as a specialized launcher that will allow most of your favorite extensions to work as you switch computers.

Portable Firefox will also work from a CDRW drive (in packet mode), ZIP drives, external hard drives, some MP3 players, flash RAM cards and more.