The social media giant also pledged to improve its ability to identify and block material from terrorist groups.
Facebook users searching for offending terms will be directed to a charity which combats far-right extremism.
The social network has come under pressure after a man livestreamed an attack on two mosques in New Zealand.
Facebook had previously allowed some white nationalist content it did not view as racist - including permission for users to call for the creation of white ethno-states.