This is a config that I have made that you can set in your profiles folder in the .mozilla directory. It is based off of privacytools.io and a few other things.
Thanks to upsidedown from the Arch Linux discord for helping me to convert it to a User.js file.
Recommened extensions: Ublock Origin, Dencentraleyes, Https Everywhere, CleanURLS, PrivacyPossum, CanvasBlocker, PrivacyBager (has had some issues lately), and User agent switcher & manager