I actually went to a McDonalds last year there, and it was fine.
I would expect that Mc Donalds would be OK, I was at a French sidewalk cafe.
It all depends on location. Some franchises have actually been terminated by McDonalds in the Paris metropolitan area.
The one near the Louvre, and along the Champs d'Elysees are great and relatively new. Others, I have looked around expecting to see cockroaches and rats... before deciding to eat somewhere else. In one of these "bad" places, I was yelled at for taking photos of the usual menus behind and above the counter.
But that is common for me. I once got yelled at over a 140Db loudspeaker system for walking on the grass.