From Real Time Logic:
Firefox UPA Edition. Configured for military-grade security and stealth browsing privacy. The Firefox Ultra Portable Application (UPA) browser is typically used when you need secure and anonymous surfing. The Firefox UPA edition consists of Firefox portable edition and the BarracudaDrive Proxy. Firefox is preconfigured to use the BarracudaDrive Proxy. The Firefox UPA Edition is a free and complementary BarracudaDrive product. The Firefox UPA Edition is a repackaged version of the Mozilla Firefox, Portable Edition. The difference between the standard portable edition and the UPA edition is that the UPA edition is preconfigured for maximum privacy and configured to use the BarracudaDrive proxy. The UPA edition is also designed to self destruct when you exit the BarracudaDrive proxy. This product is packaged as an Ultra Portable Application and requires no installation.
What's new in this version:
This version is the first release on CNET Download.com.