close firefox
sp.call(["killal", "-9","firefox-bin"])
close firefox and tab
sudo apt-get install wmctrl xdotool
val = sp.call("wmctrl -a firefox; xdotool key Ctrl+w; wmctrl -r firefox -b add,shaded",shell= True)
1080p video
Use magic actions instead of url setting (obsoleted in 2014)
go to firefox
about:config
set max_resumed_crash to be 0