X-Firefox offers 100% of the functions found in the normal, installer version of Mozilla Firefox.
X-Firefox is offered by winPenPack, an interesting project that offers people some of the most well-renowned open-source software made portable. X-Firefox is an official portable version of the popular Mozilla Firefox web browser aimed specifically at users who either don't want to clutter their computer's OS registry or have a need to run the software directly from external storage devices (even though it can also be run from the hard-drive).
