1 e4 e6 2 d4 d5 3 e5
Are you playing white or black?
The French is a very versatile defensive weapon. Redhotpawn has an IM Ronald Weyerstrass who's 350-0 and he uses the French defense almost exclusively. Your best bet is probably the nc3 winawar Kasperov said, "nc3 is the strongest move in the position."
Something like this might be good:
I need to destroy the French Defense Advanced Variation ... any advice?
any experience you'd like to share?