Re: They just store what you give them
Unless you have this in your /etc/hosts:
# Blocking facebook
# https://winbeginner.com/block-facebook-hosts-file-windows-pc/
#127.0.0.1 facebook.com
#127.0.0.1 www.facebook.com
#127.0.0.1 login.facebook.com
#127.0.0.1 www.login.facebook.com
#127.0.0.1 fbcdn.net
#127.0.0.1 www.fbcdn.net
#127.0.0.1 fbcdn.com
#127.0.0.1 www.fbcdn.com
#127.0.0.1 static.ak.fbcdn.net
#127.0.0.1 static.ak.connect.facebook.com
#127.0.0.1 connect.facebook.net
#127.0.0.1 www.connect.facebook.net
#127.0.0.1 apps.facebook.com
127.0.0.1 searchincognito.com
127.0.0.1 www.searchincognito.com
# Block Facebook IPv6
#fe80::1%lo0 localhost
#::1 facebook.com
#::1 www.facebook.com
#::1 login.facebook.com
#::1 www.login.facebook.com
#::1 fbcdn.net
#::1 www.fbcdn.net
#::1 fbcdn.com
#::1 www.fbcdn.com
#::1 static.ak.fbcdn.net
#::1 static.ak.connect.facebook.com
#::1 connect.facebook.net
#::1 www.connect.facebook.net
#::1 apps.facebook.com
#::1 edge-star6-shv-02-ams2.facebook.com
Pi-holing facebook.com would work too.