Terrible popular websites waste your CPU and energy

For me the most CPU is used by idle Youtube tabs in Firefox. Turns my whole browser into a janky mess, gets progressively worse the more time the Youtube tabs are left open/loaded.

Just a little experiment I did to test the inefficiency of websites. When looking into this, I found that most people measured website efficiency mainly based on the amount of network requests or just general subjective slowness. I wanted to see what the objective results were when isolating a website and observing CPU usage directly.

There is very little that continues to run in the browser that is of any value to the user. But they want to cram as many ads, autoplay videos and the like down our throat. How are they measuring the value of that sort of stuff that they think it accomplishes anything?

I wish I would have a way/setting to stop JS on tabs that are not in focus (without unloading them, and waiting for the reload when I focus them), maybe with a whitelist. I have plenty of memory.

Did you try facebook with a few tabs open? It absolutely thrashes your CPU and Memory with some background worker. Even with an ad&#x2F;tracker blocker, CPU usage remains high, if not higher because some request failures trigger something in that massive script.<p>And with some news and minimalistic blog sites, one would be led to think the clean design points to a lack of bloat, but nope.