Watching fireworks display I saw a red light to my NW thought it was a helicopter until it stopped on a dime and hovered for a few minutes then moved in a manner uncharacteristic of a helicopter back to the SW a 100 feet then it continued to hover and move in a very smooth manner a number of times. It then went towards the NE and I lost sight behind trees as it moved from the area. Too high for a drone too smooth for a helicopter and the manner of flight did not indicate a plane (which were in the area since we are on the flight path into Ontario airport) Multiple people viewed and exclaimed that it was extraordinary.