Recently my new MBP has been losing battery and even slightly running the fans. I checked this morning and it was this website Macrumors – which I did NOT have open(!). Quitting Safari fixed it. I had visited MR a few days back (which matches the timing), but I had no MR tabs in Safari and no other browsers. MR on my safari has often failed to scroll after a while and even freeze (and yes I think I had closed such a window). Why, of all sites, is it so often a problem on Safari, and why didn't tab closing kill it?
See composite screenshots.
See composite screenshots.