It seems to be a joke, but it isn't.

I had been using Mozilla Firefox as my primary browser until today. From now on, I'm planning to use Google Chrome as my default browser.

Weeks ago, I somehow logged in Super User for the first time via my Stack Overflow account in Firefox. Now I'm trying to log in in Chrome, but it asks my email address and I don't remember it.

When I enter my account in Firefox, I see that an email address of mine is listed there. (The same address shown for email subscription when I'm asking a new question.) But I cannot log in with that mail address. I tried several possible passwords, but non of them worked. I tried recovering my password, but it says "No account with that email was found".

What do you suggest me to do?