Firefox already blocks all trackers by default. I think Mozilla is trying to be the good guy by providing a more private option that’s available to people that don’t use Firefox. It seems pretty naive, but I think their heart is in the right place.

At the end of the day, this is just another setting to toggle off on a fresh install for those of us against all tracking and advertising on the web.

You’re not gonna find a self hosted solution as good as iCloud Photos, at least not yet. As a stop gap you can turn on advanced data protection on iCloud to significantly improve your privacy.