Sending telemetry like crashes and what features you use/don’t use isn’t really in the same category as using location data for marketing purposes. It’s a very important distinction to draw.

It has a mozilla telemetry component, but that doesn’t mean that it’s necessarily reporting to mozilla - which wouldn’t make much sense anyway - nor that it actually functions at all. Most telemetry components in Firefox can’t simply be deleted because it causes stuff to break, so they are replaced with stubs that don’t actually do anything.

For a novice, what exactly is Blocker (ROOT)? Is it an app, a setting, or a configuration?