The original email address identifier I used to get into Firefox sync was discontinued by my provider and I could no longer get or send email from that account. The new email account is a modification of the old one and now conforms with my provider’s new identifier. Of course this change made it impossible to get into my Firefox account and to use Firefox Sync. My old email address, which is no longer functional, is tied to the account and I can’t get into the account to change the settings and replace the email address. Nor can I delete the account. I tried to get into the account by switching to my google email address but the same problem arose each time. I am denied entry because the Google Authentication Code which I get on my phone and enter on my browser is always flagged as INVALID. This has happened so often that I am seriously considering changing from Firefox to a different browser. My old Firefox recovery keys no longer work either. Presumably they are tied to the old email address and password. I support Mozilla and it’s philosophy of open source, but this is driving me to desperation. All I want to do is sync my two computer browsers with each other so I can work better. To do that I need to get back into my account.