Chrome/Edge/everything else: anybody and their dog can personally identifiy individuals on the Internet and then sell that information to advertisers who use it to psychologically manipulate you into buying things. There is no consent or opt-out.
Mozilla: we've made sure people can't do any of that, but we collect anonymous statistics about how our own software is used. Oh, and we tell you about it and let you turn it off if you want.
People: Mozilla is evil and doesn't actually respect privacy.
Of course they do! Haven't you seen a fresh install of Firefox in like 10 years? The second thing you see is the little "do you want to opt out of analytics" popup. They don't say anything about the other, non-privacy-related requests FF makes (like portal and update checks), but those are explained in their privacy policy and it's very easy to verify that they in fact don't contain any information you should be worried about.
Like it or not, there isn't a privacy issue here. I wouldn't mind a "silent mode", sure, but ultimately, that's a missing feature, not a critical bug.
Mozilla: we've made sure people can't do any of that, but we collect anonymous statistics about how our own software is used. Oh, and we tell you about it and let you turn it off if you want.
People: Mozilla is evil and doesn't actually respect privacy.