I have a primary and secondary email address already registered, but I would like to change the primary email address to a different email address, that is not any email address that is already registered. There does not seem to be any option to change either the primary or secondary email address to a different one. (https://support.mozilla.org/en-US/kb/change-primary-email-address-firefox-accounts << This article does not address my problem) Thank you for your help in advance.