I've followed every guide I've found but the issue still persists. I've created a new profile, reinstalled ff after deleting the whole file from my pc, deleted all cookies for a dozen times, disabled all extensions, started ff in that problem mode or whatever it's called and I still can't login to certain websites. See attached photo. And Please don't blame this on the recent storm, this has been an issue for a long time now. We keep getting updates but no fixes. The only answer I've seen given is to disable all my security software, that's not going to happen. Microsoft edge has no issues with my security software.