It's not the entire country that stops working but there's indeed a significant reduction. If you don't have children you'd have to be crazy to take time off work during the school holidays in summer (and also like the heat if you're going somewhere in France because nowhere has mild temperatures anymore).
The legal minimum for full time jobs is 5 weeks but most people have more since they have jobs where you get extra rest time since you work more than 35h/week. Some affluent French people go skiing 2-3 times a year for a week or two each time and then also take two weeks off in summer, all paid.
I used to have 56 paid days off (that's 11 weeks because Saturday and Sunday didn't count) each year because I worked a lot more than the legally mandated hours and I had advantageous time credit for showing up early and leaving late and 4 days extra because I never took time off during school holidays (incentive to keep the shifts fully staffed). The pay was shit but at least I could go on trips all the time. I did end up getting a lot of those days paid instead because I didn't have enough money to travel all the time and I couldn't be bothered to stay home.
With this much time off our productivity was still very good, everything was timed and we always went above 100% of targets and long-term projects always done early.
Blue collar work in the USA looks like a scam in comparison: working the same job I would have had less purchasing power (sure the numbers entering your bank account are higher, but the health insurance alone cancels it out), more working hours and a lot less paid leave.
French fair trade brand with a lot of choice: Éthiquable
Not sure if they export much. The prices in France are reasonable considering cocoa prices make even junk chocolate quite expensive.