Imagine having 20 tabs opened solving stuff in background. Although modern browsers slow down the JS clock in the inactive tabs, it's still a killer for the CPU

Imagine having 20 tabs opened solving stuff in background. Although modern browsers slow down the JS clock in the inactive tabs, it's still a killer for the CPU. The new equivalent of having adverts playing loud music and render video in 20 tabs (the music will be emitted by your CPU fan).