I see an average of 24% CPU usage on each of my 4 cores - with that page loaded in two separate Firefox installations. Firefox 38.7.1 with a 'ton' of add-ons in its' Profile ''(for regular surfing)'' and a "virgin" Profile ''(no add-ons)'' on Firefox 47.0.1 using Win7 32-bit desktop using an AMD64 3.2 GHz 4-core processor with only 4 GB of RAM. As the page was loading ''(very slowly BTW)''' one core did spike to ~50%, but decreased within '''like'' 30 seconds one the page was loaded. ''With only the "virgin" 47.0.1 installation running ...'' When the page is scrolled down to the bottom and that "slideshow" is running in the browser window - all 4 cores are pegged at 100%, RAM usage doubles, and the Power Supply fans kicks into top speed, which rarely happens. That's the culprit - "that slideshow". ''I'd sure hate to view that page at the bottom on an older 2-core laptop, sitting on my lap and risk burning my thighs.'' I built this desktop 14 months ago and can't recall ever coming across a website that did that before.