How are you trying to do it? https://accounts.firefox.com I can delete my 2nd email address which is the comcast account and then add another email address. Then I can make the new email address my primary. see screenshot You can see in the 2nd screenshot, I could make the 2nd new hotmail account my primary if I needed. see screenshot

I'm sorry, but even enlarging your screenshot to 150%, it is too small for me to read.

Your 2nd message asked for some information. Here are the answers: 1. I don't use 'Save Page As'; I try to save it as a bookmark. 2. My screenshot page does not display a timer; 3. I'm using Windows 10; 4. The Firefox version is 139.0.4 and says it is up-to-date; 5. I want to delete the primary address and change it to another one of my addresses that I had used in the past, but the response I get is that it is already in use. It was - BY ME! Thank you for trying to help me.