Using FF 143.0 on Win10 64 bit. I do not use any password manager. Before I logon to any site, as a matter of course, I clear all cookies and history. I logon just fine to many sites. However, only at: amazon.com do I see this pop-up. There appears to be no way to actually verify it is really me. And there is no difference in action between "Cancel" or "X' closure. Lastly, this pop is modal. It can not be bypassed. I have to kill it to continue to amazon. amazon is the only place this appears, and I really don't know what is generating it. Any clues anyone. BartelsJuice