I can confirm the strace messages and FF's 15% erratic usage on a dual core i3 Skylake laptop. I guess I never noticed it compared to how FF used to chug after

I can confirm the strace messages and FF's 15% erratic usage on a dual core i3 Skylake laptop. I guess I never noticed it compared to how FF used to chug after long use and Google Chrome's same usage of around 30-40% of my cores.