FHR + Shield vs release channels [note Bug 1447226]

[Thorin-Oakenpants]

snip

[earthlng]

the 2 extensions.shield-recipe-client.* in 0512 are removed in FF60 and Normandy/Shield is no longer a system addon. Therefore I would create a new 0503 because at 0510+ are the actual system addons.

/* 0503: disable Normandy/Shield (FF60+)
 * Shield is an telemetry system (including Heartbeat) that can also push and test "recipes"
 * [1] https://wiki.mozilla.org/Firefox/Shield
 * [2] https://github.com/mozilla/normandy ***/
user_pref("app.normandy.enabled", false);
user_pref("app.normandy.api_url", "");
user_pref("app.shield.optoutstudies.enabled", false);