Fuck this shit, in the past months we had CliqZ https://news.ycombinator.com/item?id=15421708, we had Mozilla adding new telemetry, we had Mozilla force-enable toolkit.telemetry.enabled, we had Mozilla say that, if you download Nightly, that is considered opt-in to tracking, we had Mozilla put Google Analytics into the Addons menu (because it’s loaded from addons.mozilla.org: https://github.com/mozilla/addons-frontend/issues/2785 ), and we had Mozilla say that, if we don’t trust Google, we shouldn’t use Firefox.
Fuck this.
Every browser vendor has this control over you when you use their browser. Some have even more, because they don't even need to tell you about it when they're closed-source.