I realize that Symantec is not going to try to match itself with the shifting sands of a beta product. This report is just for informational reasons.
I installed Firefox Beta 3.6 today. Keep in mind that I have kept the corrupted patched NIS active. With both products running, I was unable to activate ANY add-ons in Firefox even after forcing it to re-recognize add-ons. I will try again with NIS2010 previous version soon, but perhaps someone else will beat me to it. 