For a while now (over a year), after using Firefox for YEARS, I am having LOTS of trouble logging into my Online Citibank. I am using 64bit version of Firefox. I go to citi.com and put my Id and Pw in, then signin. I see the page loading, with Citi webpage boxes showing Just as Shadow/Boxes for a moment or two, then I get a You Successfully Logged out!! Try again. Same. I believe that I have Sometimes gotten something about Logged Off for Inactivity. If I am able to QUICKLY Click on one of the Shadowed Boxes, I get ON my Citi webpage and am able to do my banking, without further problems. I have Cleared my Cache and Other suggested (from reading problems from other users) fixes, but NOT fixes. I do NOT have this problem on ANY OTHER websites! So, some conflict with Firefox and Citibank. I WAS able to login, with NO problems with Microsoft Edge. Didn't try Chrome.