To further understand how bad the Tank situation was in Normandy; one tank commander of the 3rd Armored Division had an M4(75mm) tank as the lead vehicle armed with Smoke. Yes Smoke, when they came across a Tiger the idea was the lead Sherman smokes the tank for long as he can, while M4(76mm) try to flank the tank. Unfortunately being the Lead tank, these were often blown to bacon bits and the Germans adopted the tactic of aiming for all Sherman 75mm's first. The main reason for the Sherman (75) because 76mm Smoke rounds were not common in the arsenal at the time, so the Sherman 75 was tasked with the job.
It worked, but sadly many many crew members paid for it since when there "one tiger" there always is a second Tiger, or supporting vehicle nearby. Unlike Kursk in 1943 where it was accompanied with a Panzer IIIN for support; a Tiger in Normandy came in a platoon of 4.
