Originally Posted by
Cloudship
I would try deleting cookies first. Seems to be a problem with the latest version (42) Firefox - Our solution here, which seems to be working for anyone who has complained of the problem, is to open Firefox, delete the cookies, and make sure you close out of firefox completely and restart. Seems firefox sometimes hangs around for a few few after you think you closed it.
Thank you; I'll try that on my FF as well.
Clearing cookies periodically can be useful for some different browser issues.