I noticed a huge difference with this site: http://www.2ality.com/2015/02/es6-classes-final.html http://www.2ality.com/2015/02/es6-classes-final.html In the pr

I noticed a huge difference with this site: http://www.2ality.com/2015/02/es6-classes-final.html http://www.2ality.com/2015/02/es6-classes-final.html In the previous Firefox version scrolling on that site was laggy to the point of being unusuable for some reason.