Meh, the feature is easily deactivable, the settings are clear and extensive. As far as ads go, it's one of the best implementations. Firefox still has no alternative in the privacy / user-centric space (don't mention Brave, I'm gonna get mad). Mozilla has done a lot for the web, I can give them some slack for exploring different revenue models. Still, I'm going to keep on eye for this kind of practices in the future…
We all know regular users don’t change settings. At the least it needs to be opted out by default.
People complain when the default is opted-in. Now someone makes something that by default is opted-out and... people still complain.
They ask that when someone uses telemetry, that would be shown upfront. When someone does that, they ask it to be disabled by default. And when we get disabled by default, where do we go? Remove the feature, ofcourse :)
Ads, privacy and telemetry is a hot cake topic on HN.
That button is actually a cheap way to support mozilla, if anyone cares.