What years did Browning have the safety in front of the trigger in the trigger guard?

Browning had the safety in front of the trigger in the trigger guard primarily on its early designs, specifically the Browning Hi-Power pistol introduced in 1935. This design feature was used in various models until the late 1970s, as newer designs moved towards other safety mechanisms. The safety placement was a distinctive characteristic of many Browning Firearms during this period.