Because implementing such user protections takes away from the revenue stream of webpage owners. As a result of that, those have much less of a incentive to ens

Because implementing such user protections takes away from the revenue stream of webpage owners. As a result of that, those have much less of a incentive to ensure compatibility with Firefox, which ultimately means lots of broken webpages when browsing with Firefox. What's more, with Google at 60% market share and growing, and not offering such protections for their users, it becomes increasingly more likely for webpage owners to just drop Firefox completely. It's not worth the effort compared to the money they make off of oblivious Chrome users. You also seem to not be aware of Tracking Protection. Firefox blocks trackers by default in Private Browsing. There's more examples where Firefox goes the extra mile to protect user privacy, but Tracking Protection really is just exactly what you said. You should've seen the outcry from webpage owners when that was pushed out to users.