Disable telemetry

[k2662]

from librewolf.cfg:

// disable telemetry in Zen Browser
lockPref("browser.newtabpage.activity-stream.feeds.telemetry", false);
lockPref("browser.newtabpage.activity-stream.telemetry", false);
lockPref("toolkit.telemetry.unified", false); // master switch
lockPref("toolkit.telemetry.enabled", false);  // master switch
lockPref("toolkit.telemetry.coverage.opt-out", true); // hidden
lockPref("toolkit.coverage.opt-out", true); // hidden
lockPref("toolkit.coverage.enabled", false);

[giuli635]

Hello! Digging into the source code, I think most of them are already set, except for toolkit.coverage.enabled