﻿Warning: This is NOT A FINAL OR PRE-RELEASE VERSION. This program is provided without any guarantees of stability, so please use it at your own risk. It is recommended that you back up your profile regularly, as there may be bugs that corrupt your data. If that sounds scary, you should stick to the latest version of Mozilla Firefox, Portable Edition, which you can download here:
http://portableapps.com/apps/internet/firefox_portable

Note that this application will not run at all on a 32-bit installation of Windows regardless of version (XP through 8/8.1).  It is made available solely for testing purposes.  PortableApps.com does not officially release 64-bit only portable apps.