The thing is, FF/Moz have a lot of telemetry which is on by default, and most of the toggles are hidden away and can only be disabled by digging through about:c

The thing is, FF/Moz have a lot of telemetry which is on by default, and most of the toggles are hidden away and can only be disabled by digging through about:config. I encourage you to see for yourself how much there is, visit about:config and filter for "telemetry" and then "beacon". It's a lot. They track things like every time you close and open the browser, check for an update, and lots more. I took an hour to through and disable it all on each of my machines.