Portable Edition is the popular Mozilla Firefox web browser bundled with a PortableApps.com Launcher as a portable app, so you can take your bookmarks, extensions and saved passwords with you. It has lots of great features including

Popup-blocking
Tabbed-browsing
Integrated search
Improved privacy features
Automatic updating and more

The recent changes made to the protable Mozilla Firefox are

Firefox updated to 3.0.1
Better [...]