PUBLIC MARKS from decembre with tags lifehacker & portable

Firefox user Asian Angel loves Portable Firefox for projects like creating a Google Chrome clone, but you can also use it to run multiple, sandboxed instances of the browser at the same time. What's the point? Well, it lets you log into multiple accounts at the same service (like Gmail) in different windows, and run certain extensions and styles in one browser instance but not another. You already know how to create multiple Firefox profiles and even run them simultaneously, but using Portable Firefox you can easily back up your customized installations and run them anywhere. Reader Asian Angel explains how she assembled a colorful "Firefox six pack" using the portable app.

A standalone, portable version of the latest version 2.6.1 of the GIMP image editor is now available to download and run from your USB drive, plus two useful plug-ins: the GIMP Portable Photoshop Layout plug-in, which approximates the Photoshop dock and toolbox, and the GIMP Portable Background Window plug-in, which lets GIMP occupy a single window. [via]

if you liked what you saw in the screenshot tour of Opera and were impressed by its performance in our speed tests, you can now grab Opera 9.5 USB to run from your thumb drive