If you have lost your phone, changed phone or simply lost access to you Google Authenticator account you can reset your 2FA using the following link: https://www.bitfinex.com/reset/2fa
Alternatively, you can find the reset link after the login page as displayed here:
Note: you qualify for a 2FA self-reset if your account total equity is below 10,000 USD equivalent otherwise please get in touch with our customer support team. More information on the procedure is available at Google Authenticator 2FA Reset.