nowadays,there are a lot people lost their facebook account and do this to avoid other risk to nothing to lost facebook account.
You must follow this step:

  1. Protect your password
    • Don’t use your Facebook password anywhere else online, and never share it with other people.
    • Your password should be hard to guess, so don’t include your name or common words.
    • Learn more about creating a strong password.
  2. Log out of Facebook when you use a computer you share with other people
  3. Watch out for malicious software
    • Malicious software can cause damage to a computer, server or computer network.
    • Learn the signs of an infected computer or device and how to remove malicious software.
    • Keep your web browser up to date and remove suspicious applications or browser add-ons.
  4. Never click suspicious links, even if they appear to come from a friend or a company you know
    • This includes links on Facebook (example: on posts) or in emails.
    • Keep in mind that Meta will never ask you for your password in an email.
    • If you see a suspicious link on Facebook, report it.
  5. Use facebook extra security options

    • You can also get alerts about unrecognized logins, and set up two-factor authentication.
    • If you’re logged into Facebook on a computer, you can use Security Checkup to review your security settings.