I am running Linux Mint 17 (Linux Kernel 3.13.0-71-generic) on my HP Envy 17j (Core i7, Quad core). The laptop runs normal while using any programs. But when I open facebook.com or similar sites (e.g. Ziptask.com), then it starts consuming excessive CPU and the laptop overheats. The CPU usage is around 140%.
I tried with both Google Chrome and Firefox and it is the same case. Maybe it is trying to load some components like HTML5 graphics that are causing the problem.
What may be the correct way to diagnose and solve this issue?