as someone with many tabs across many windows across many desktops/spaces, one weird trick i found is that when firefox starts up (on an intel MBP, 2019), it wi

as someone with many tabs across many windows across many desktops/spaces, one weird trick i found is that when firefox starts up (on an intel MBP, 2019), it will churn CPU at over 100% until you go and foreground each of the windows in each of the workspaces. then the CPU usage becomes normal. perhaps it has to do with extensions like noscript or ublock origin, or my propensity to start firefox without internet access, but i don't think that matters here. not sure why this happens, but it's been required across at least the last few firefox restarts for me.