Firefox asks for authenticator app code when I try to log in, but I never set one up

Hi, I recently bought a new phone and was trying to sign in to Firefox on Android. However, after entering my password, it told me to enter the code from my authenticator app. I do not use an authenticator app for anything besides my university account, as I prefer to receive 2FA codes via text. I also do not recall setting Firefox up to use 2FA. Now, I am logged out of the account on all my devices as they ask for a code in an app I do not have access to nor recall setting up. I hope there is a way for you to help me beyond deleting my account, as I'd prefer not to lose my bookmarks. Regards, Seán