Can I travel to England even though I have a Felony?

Ok. I have a felony in the U.S. federal drug charge. No longer on supervised released (probation) and I have my passport. I’ve heard that because I am a felon I cannot travel to Canada, U.K, Australia, Japan. Is this true? And what about the Schengen agreement, say I go to France first, can then I go to England and be accepted beacause of this “treaty”? Thnx!