Sometimes the problem is not Facebook, but your browser. Here are quick fixes for major browsers.
Facebook will offer one or more of the following: desktop facebook login page
Create a strong, unique password (at least 8 characters, mixing letters, numbers, and symbols). Sometimes the problem is not Facebook, but your browser
If you don't have an account yet, the desktop login page also serves as the registration portal. Click on at the bottom of the login box. You will need to provide your name, birthday, gender, and a valid email or phone number to get started. If you don't have an account yet, the
Navigate to to enable 2FA. Use an authenticator app (not SMS, which is vulnerable to SIM swapping).
The desktop login page can be used to pre-approve your current browser, so you never need a 2FA code again on that machine. This is ideal for home desktops:
The desktop login page is a frequent target for "phishing" scams. To stay safe: