Annoyance and Figuring Out Why Using Firefox Profiler

If you ever hit the situation where a website causes your browser to hit 100% CPU usage, you should install Mozilla Firefox Profiler and then launch the Profiler Tab (Tools > Web Developer > Performance).  You can then see v4.motads.com is sucking up so many resources.  You can hit almost any major site, and see these requests.

Profiler
Profiler

I found the reason documented by the Electronic Frontier Foundation https://www.eff.org/deeplinks/2013/06/third-party-resources-nsa-leaks

 

Also, you should look at https://panopticlick.eff.org/index.php?action=log&js=yes and see how trackable you are

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