You can get Refractor (Prism addon) to work in Ubuntu (and probably other unices) with one added step to the install process.
After installation you need to right click the icon and choose Properties.
In the Command box change “firefox”, for me it was “/usr/lib/firefox-3.0.4/firefox”, to xulrunner.
Tags: configuration, firefox, Linux, prism, refractor, ubuntu, xulrunner