Delete the passwords in Options/Security/Passwords/Saved Passwords, restart TB, and enter a secure mail key instead of a regular account password, when prompted.

https://support.mozilla.org/en-US/questions/1293771

FYI, I AM NOT A COMPUTER PERSON, WHERE DOES ONE FIND OPTIONS/SECURITY/ PASSWORDS/SAVED PASSWORDS SO I AM STILL LOST. LOOKED IN ACCOUNT SETTING, FOUND NONE OF THE ABOVE

Click the 3-bar icon in the upper right corner, then Options, Options.

I AM STILL AT A LOSS, JUST MAKING THINGS WORSE, DO YOU KNOW IF THERE IS ANYONE THAT I CAN CALL TO WALK ME THUR THIS? sfhowes THANKS FOR YOUR HELP, LIKE THE PIC OF THE MT. GOAT. RANDY

Just follow the directions in the link provided in my first reply:

https://www.att.com/support/article/email-support/KM1240308

When you are prompted for the password, enter or paste the secure key. If you need help with creating the key, call the AT&T support.