I don’t think it should’ve been opt-out, but Mozilla’s ad metrics development is very much the direction ads on the web should go in. It is impossible to determine who you are from the data. They’ve truly done a good job on creating an ad model that’s privacy friendly, and would be a material improvement to the web.

It’s a way to still have ad revenue funding the content we all consume, while also still maintaining privacy. It’s a good thing. It’s just the opt-out aspect for existing installs that’s bad.

That said, I’m personally a proponent of just using adblock lol