Mozilla launches its new version of Firefox usb version.
It has lots of great features including pop up-blocking, tabbed-browsing, integrated search, improved privacy features, automatic updating and more. Plus, thanks to the PortableApps.com launcher bundled in Mozilla Firefox - Portable Edition, it leaves no personal information behind on the machine you run it on, so you can take your favorite browser along with all your favorite bookmarks and extensions with you wherever you go.
Go to http://portableapps.com/apps/internet/firefox_portable and download Mozilla Firefox - Portable Edition
Install it and run it so Mozilla will generate the default configuration files (Change Mozilla Firefox’s option as needed)
Download this file to the same folder as FirefoxPortable.exe
Finally, copy the whole folder to a USB or even a CD and enjoy!