How to Block Facebook with Mikrotik

1. Login via winbox

2. Create filter rules as below :

/ip firewall filter add chain=forward content="facebook.com" action=drop comment="Drop Facebook"
/ip firewall filter add chain=forward content="www.facebook.com" action=drop comment="Drop Facebook"
/ip firewall filter add chain=forward content="apps.facebook.com" action=drop comment="Drop Facebook"
/ip firewall filter add chain=forward content="facebook" action=drop comment="Drop Facebook"
/ip firewall filter add chain=forward content="facebook.*" action=drop comment="Drop Facebook"

Via Terminal:

Then a result like this