Mozilla Firefox has gained popularity in recent months because of its reputation as the faster and less bug-ridden alternative to Internet Explorer. But what if its simply impossible to install Firefox in your office PC due to draconian (but probably necessary) restrictions on administrative privileges? Fret not, for you can carry an installation of Firefox on your USB flash drive (also popularly known as thumb drives, thanks to pioneer Trek). Portable Firefox has been around for a while, but it only runs on Windows machines. So I was really excited when I came across this Cross Platform (Mac & PC) version of Portable Firefox.