Can't Log In To the FCC Forum

[Arcinglight]

I bought a new computer. Since I use FCC on Firefox I tried to log in to the forum on FF. But even after entering the correct password multiple times, I couldn’t log in. I sent a password reset request which arrived in the built-in mail client in Windows 10. It opened the link in Edge, where I tried to enter the old password and it showed me that I was entering the old password. Setting a new password logged me in on Edge, but even upon entering the new password into FF it won’t log me in.