Firefox Add on -> No longer have backup codes or authenticator app due to computer crash

So I have an extension on an account, however due to losing the backup codes and authenticator app due to my computer crashing. Im a bit lost in being able to upload the new version of the extension.

I have read the article that due to not having either of these or an account logged into it still. I am a bit stuck. Is there an email address or any contact details that will allow me to try to resolve this problem (That my annoying PC basically blowing up has caused?!)