This is quite backwards. Right now revolts in France are useless. When they were useful back in the days, a lot of citizens had guns. Guns laws changed to reduce their powers
They are not useless in the sense that they are visible and at some point the state cannot only respond with more violence from police force forever or else the dictatorship becomes assumed.
But current protests aren't revolts nor violence anyway. There is side/peripheral violence but that is not the point of the protests
We are 68 million and between hunters and sport shooters we have 5 million firearms owners for 10 million firearms. It's not on par with the US of course but I'd say firearms are pretty common (and it's not even counting illegal ones) and frankly it's not difficult nor long to acquire a good bolt action rifle and learn to shoot an apple at 200m. Long story short: I don't think lack firearms control is the issue in the US, there must be something else.
Many people here will tell you that cartoons represent violence, some types of speech represent violence etc. France no longer has free speech rights unless it is coming from the left