On Tue, 31 Oct 2017 11:13:38 +1300, I wrote:
Noticed your machine getting slow after visiting
They could be running cryptocurrency miners in your browser.
And of course, with the old pop-under trick
you may not even notice that there is a window still open and running
the miner after you thought you’d closed the window to that site ...
I don’t think this trick would work for me. I am rather fond of Compiz
and its OpenGL-based animation effects. One of the effects I have turned
on is windows moving temporarily to the side as other windows come to
the front. This animation makes pop-unders rather noticeable ...