Just found this interesting and vast guide to reducing outgoing tracking data from Firefox. It's in the form of a user.js file which you could deploy altogether, or select particular items and edit them with about:config. Firefox does appear to send various data out and most of us probably don't need the functionality this data supports. Who ever used "Pocket" for instance?
https://gist.github.com/MrYar/751e0e5f3f1430db7ec5a8c8aa237b72