I think they mostly are. I was trying to help them with with info on swappiness and all... Well when you open android firefox and check memory stats you'll notice that it eats 15% of available memory. Add then android opera and it eats another 15 %... That was the way I was checking if those settings helped. It is helping to open more apps. But sadly swappiness to insane numbers like my 99 adds lag to ui.