MrYar

// Turn off "Sends data to servers when leaving pages"
user_pref("beacon.enabled", false);

// Prevention of some telemetry related to the newtab
user_pref("browser.newtabpage.directory.ping", "");
user_pref("browser.newtabpage.directory.source", "");
user_pref("browser.newtabpage.enhanced", false);

// "In the release channels the Mozilla location service is used to help in figuring out regional search defaults."
// Which means sending collectable data

aras-p

// Just before switching jobs:
// Add one of these.
// Preferably into the same commit where you do a large merge.
//
// This started as a tweet with a joke of "C++ pro-tip: #define private public",
// and then it quickly escalated into more and more evil suggestions.
// I've tried to capture interesting suggestions here.
//
// Contributors: @r2d2rigo, @joeldevahl, @msinilo, @_Humus_,
// @YuriyODonnell, @rygorous, @cmuratori, @mike_acton, @grumpygiant,