As above.
With LED headlamps, most likely there will be a setting for RH and LH traffic, so you want need stick-on deflectors. The setting might be in the instrument cluster menu or a physical switch on top of the headlamp inside the engine bat, I do not know.
That said, I would buy a pair of stick-on deflectors and keep them the glove compartment, just on case you are stopped by an unfriendly gendarme with no English - it might prevent an argument and save time...
EDIT: Just saw st13phil's post. Makes sense that if you have ILS it will manage to avoid dazzling oncoming traffic from any side of the road. But I would still keep the stick-ons handy just in case French police are clued-in on the latest technology.....