Browser Appliance Virtual Machine

From VMware:

The Browser Appliance is a free virtual machine that allows users to securely browse the Internet using Mozilla Firefox. Run the Browser Appliance with VMware Player to:

Protect Against Adware and Spyware: Users protect their PCs against adware, spyware and other malware while browsing the Internet with Firefox in a virtual machine. The Browser Appliance leverages virtual machine isolation capabilities to prevent malware downloaded in the browser from propagating to the normal desktop.

Safeguard Personal Information: The Browser Appliance can be configured to automatically reset itself after each use so personal information is never stored permanently.