It's not about "what he's used to", it's about playing him to his own strengths, Browner's size over wide receivers is his greatest asset, not his cover ability.
He loses his biggest, and really only, advantage when lined up against someone 2 inches and 40lbs biggers than he is.
You put him on a teams #2 or 3 receiver and he has the ability to eliminate that read by blowing up the route, you put him on a tight end and he has to cover through the entire route because he probably won't disrupt it nearly enough to ruin the timing and eliminate the read, making him a liability against someone bigger and more physical.
There is a reason that when TE's are hit off the LOS it is usually by a 265-270lb linebacker or defensive end and not a 190-220lb corner.
Size isn't everything but it does mean a lot. Browner has 20lbs over most WR's, most TE's have at least 20lbs on him. The game changes drastically.
A player like Revis, or as we saw with Talib on Graham, is able to beat a TE not because of his physicality but because of his excellent coverage ability and not letting the TE body him out.
You put Browner on Julius Thomas and he'll give up 6 touchdowns down the seam that game.