Cannot change the email address linked to account
Hi
I am unable to add a 2nd email address to my firefox account. The error message says failed to send email.
the original email address I had no longer exists so I need to change the email address on my account
Opaite Mbohovái (1)
Sorry for that problem. Users need to add a secondary email address while they still have access to the primary email address; that is part of the security features for Firefox Accounts.
Now the solution is to create a new Firefox Account with the email address that you wanted to use as the secondary email address. Then sync your devices with the new Firefox Account.
https://support.mozilla.org/en-US/kb/access-mozilla-services-firefox-account