My favorite privacy tweaks to Firefox's configurations.
MZ (Malaz)[ about:config ]
media.peerconnection.enabled = false
privacy.resistFingerprinting = true
privacy.trackingprotection.fingerprinting.enabled = true
privacy.trackingprotection.cryptomining.enabled = true
browser.cache.offline.enable = false
browser.urlbar.speculativeConnect.enabled = false
dom.battery.enabled = false
dom.event.clipboardevents.enabled = false
geo.enabled = false
media.eme.enabled = false
media.gmp-widevinecdm.enabled = false
media.navigator.enabled = false
network.cookie.cookieBehavior = 1
network.cookie.lifetimePolicy = 0
network.http.referer.trimmingPolicy = 2
network.http.referer.XOriginPolicy = 2
network.http.referer.XOriginTrimmingPolicy = 2
webgl.disabled = true
browser.sessionstore.privacy_level = 2
extensions.pocket.enabled = false
network.IDN_show_punycode = true