You could not be more wrong.
However, I am not surprised you would believe that: I have quite a few French friends who believe the exact same thing because they've all drunk the kool-aid that was served to them during their school years, namely that France is the country who invented human rights, freedom of speech, etc...
Nothing could be further from the truth (England is a way better approximation to "invented free speech" than France ever was, where do you think Voltaire discovered what Freedom really meant if not during his exile years in England?).
Even today, your average Frenchmen is dead convinced that freedom of speech in France is one of the best in the world and a fundamental value of French society.
If you compare it to Iran or North Korea, fair enough. But then go look up what happened to a guy named Dieudonne if you want a perfect example of there being no freedom of speech whatsoever in France.
Compared to global standards, France is really not high on the individual freedom / freedom of speech scales, but then you have to be able to properly compare things to make vaguely correct calls on such things.
And if you have never left your country nor master English well enough to understand what goes on outside your tiny cultural bubble, and you have been indoctrinated by the French school system since day one, it's a perfectly normal thing to believe.