Re: So if it knows what the tracking stuff is
>Why doesn't it give us a way to "delay" it to infinity if we wish?
Those are two different objectives. FF's objective is to get you the content quickly. The "broker" sites are often slower than the content sites so it makes sense to "re-queue" them. Also, with any innovation there is disruption and you want to be sure your innovation doesn't break things unexpectedly.
As for giving you a way to delay things to infinity, It does. But you have to want it enough to make the small effort of looking for the add-on.
Kudos to FF for getting it right. 57 is much faster. I was dubious about bothering with "a faster browser" but I really appreciate it.
Biting the hand that feeds IT
