Every once in a while I have a client that requires more extensive browser testing. For most Windows-based browsers I have them installed locally or run a VPC with them installed. I am not a Linux expert by any means so the thought of standing up a particular flavor of Linux to support testing was not appealing. Then I found UNetbootin the Universal Netboot Installer. (http://unetbootin.sourceforge.net/)
This utility enables me to format a USB stick with my choice of Linux. The default installation is non-persistent, which can be an advantage. If you want to make your installation persistent you can follow the directions on Live USB Pen Drive Persistence. Bottom line is you copy the casper-rw file and change the configuration file adding the persistence directive.
The best part is that in 15 minutes you have a test environment.