The makers of the Opera web browser don't officially make a portable version of the browser that can be run from a USB stick. But if you want to run the recently released Opera 9.5 browser without installing it or making any changes to your registry, one third party developer has got you covered with Opera 9.5 USB.

All you need to do to run Opera 9.5 USB is unzip the program folder to your hard drive or to a USB stick. You can run the program without affecting your current Opera versions or other web browser settings. And you won't leave any data on the host computer, so if you want to borrow a friend's computer without leaving access to your browser history behind, Opera 9.5 USB cold come in handy.

If you're more of a Firefox person, you can also grab a portable version of Firefox 2 or Firefox 3 RC2. Like Firefox Portable, Opera 9.5 USB is Windows only.

[via CyberNet]