The USA is visa free for citizens of Liberia using the new ECOWAS passport.
Which North American Country is visa free with the New ECOWAS Liberian Passport?
One to get up to date information on this would be to go to the ECOWAS website and use the contact section to ask about recent changes to the Liberian passport requirements. Normally you wuold go to the Liberia Consulate General but they are not issuing passports at the moment; however, you could contact them with general enquiries.