I am running Firefox 81 under Ubuntu 20 LTS. I need (like) to have huge number of tabs open. The problem is that JavaScript in all these background tabs is still running which adds up sometimes to 40% CPU usage which in turn switches my comp into farelka.
How can configure Firefox to freeze background tabs or at least disable JavaScript in the tabs except the one that is currently visible?
Or perhaps it is possible to nice them to say 19?