Wrong.
The first issue I ran into was not being able to navigate one of my TX sites without being logged out. That wasn't acceptable to me, and since adding this was the only change to my system I figured I would uninstall it and my problem would be solved.
Wrong again (sensing a pattern here yet?)
So this add-on is gone, system has been cleaned and now in addition to not being able to navigate my TX, I can no longer log into gmail.
Anyone with suggestions on how I might solve this problem short of dumping firefox and starting over again?