Firefox-Hilfeforum

I am switching jobs and want to sync my Firefox history from old work computer to new. Both run Windows. I changed the primary email associated with my account from the old work account to a new email. No problem. I synced the new email to my iphone no problem. Now im trying to download and sync Firefox to my new laptop. Running Windows and Im trapped in a crazy loop. I login with correct password to the new email and it asks for the authorization code and when I enter that, Firefox switches to the OLD email and asks for that password. I am not sure I have that password correct because i set the account up four years ago. Regardless, i cant sync my new laptop. But I was able to sync it on my iphone so it CAN be done with the email addy and password I am confident about. Please help.