How to merge an old Mozilla Support account into my Firefox Account (with a different email address)?
I had a Mozilla Support account with an email address. I have a Firefox Account with a different email address. I'd like to merge them, as hinted about in link text.
However, I cannot follow the instructions given: "First, log in to your Mozilla Support account. From there, you can follow our prompts to verify and link your Firefox Account to your existing Mozilla Support account."
Where can I still log into the Mozilla Support account? The same FAQ also states, "You can no longer log in using your old Mozilla Support credentials after the system upgrade was completed on April 14, 2020."
So what can I do now?