Well, about the very same moment you see "Browse like no one's watching / Automatically block online tracking while you browse" app starts to silently send some data to app.adjust.com and incoming.telemetry.mozilla.org.

If that's not controversial, that's at least ironic.

(Just to clarify: this particular behavior was observed on a version from a Play Store, not FDroid. And this was about 1.5 months ago or so. But I doubt things had fundamentally changed since then.)