Firefox not loading Admin

I have no clue either, unfortunately. There's another thread (below) that may be indirectly related to this that we're investigating now.

Do you have any sort of plugin that would log you into the admin area if you are logged into the front-end? On the admin side, we actively prevent JFBConnect from loading some features. We don't want Facebook logins to happen in the admin area, but if you have something that may be trying to forcibly load/login through JFBConnect, that could be the cause of the problem.

Really though, it boils down to that that is unexpected behavior. If you have any more information on how your system may be configured differently than most others regarding registration/login, especially on the admin side, that may help us debug further.

Other post where on admin side, repeated logins are occurring:
www.sourcecoast.com/forums/topic?id=1468&p=1#p6010

The other thread (posted above) seems to be having the same issue. I've asked that user (evil) to post here with any updates they have. It seems there's something similar between your sites, and, again, JFBConnect shouldn't be trying to log in on the admin side. So I think there's some configuration option that's trying to force a login.

Does this only happen for you, as it does for the other user, if you log in through Facebook on the front-end and then try to hit /administrator? If you're not logged in on the front-end, does the admin area work as expected?

Thanks.. we'll get to the bottom of it.

I just responded to your (Evil) other post about a different issue. The fix for that, re-ordering the JFBConnect Authentication plugin to after the Joomla Authentication plugin), seemed to also fix the Firefox issue. You deal with it more often, so this may not be the solution, but let us know if it helps you out.
www.sourcecoast.com/forums/topic?id=1324&p=1#p6153

As posted there, I've never seen ordering in the Authentication plugins make any difference, so this is strange, but would really like to hear your feedback.

Thanks!