You're assuming that Firefox is eating all your commit space, but it's not, far from it, I can see it from the crash reports. You've got other applications running and they are also fighting for it, leaving large chunks unused. Without some swap space available Windows is leaving 10+ GiB of physical memory free which it cannot use for anything else.
This is how Windows behaves by design, there's nothing we can do about it. Windows without a swap file sucks.
This is how Windows behaves by design, there's nothing we can do about it. Windows without a swap file sucks.