What Is the Difference Between Firefox & Portable Firefox?

The only notable difference between Firefox and Firefox Portable is platform availability. PortableApps works natively only on Windows, though it can work on Linux or OS X with Wine or Crossover. Otherwise, both offer the same features, right down to the Firefox Sync feature — so, you can have Firefox installed on a home or work computer and have all your settings synced to Firefox Portable on a USB drive. If you own all the computers you use, the regular version of Firefox is less of a hassle. If you share a computer that doesn’t have or regularly use computer labs or libraries for Internet access, Firefox Portable enables you to work with your own settings, bookmarks and add-ons with you at all times.