I think you meant opt-in. But it's actually opt-out in the case of Firefox, which has been shipping with Enhanced Tracking Protection enabled by default since 2019. https://blog.mozilla.org/en/products/firefox/firefox-now-ava...

Opt-out means on by default, opt-in is off by default (sorry to state the obvious).

The users above are referring to opting in/out of the tracking rather than the blocking of the tracking - so GA on Firefox by that standard is opt-in, even though in a Firefox specific context the setting is opt-out.

Obviously the EU wouldn't be cool with "but a competing browser with a small market share blocks us by default anyway".

Yeah, I guess it depends on what the opting is for. I could have phrased that better.

What I meant to say: third-party tracking is still opt-out, since you need to actively enable the content blocking to avoid being tracked. The blocking of said content trackers is opt-in of course, but that's not what I was referring to.

Firefox does. Enhanced Tracking Protection, which (I think?) is enabled by default, blocks the GA script.

That's true in one sense. In another sense it refers to not requesting the tracking scripts in the first place (ie. not opting-in). That perspective works better if you think of the browser as a user-agent.

It's not really an importance distinction in the end though.