That can be a great feature in some circumstances, but it also seems like it can undo much of the efficiency improvement browsers have accomplished by throttlin

That can be a great feature in some circumstances, but it also seems like it can undo much of the efficiency improvement browsers have accomplished by throttling and sleeping less used tabs. Do browsers implement any kind of leashing in terms of how much resources any particular site’s workers can use, frequency of running, length of runs, etc?