Firefox can exhaust swap while `MemAvailable` remains above the unload threshold. Track new `pswpout` pages so active swapping triggers tab unloading without treating stale swap occupancy as permanent pressure.
Wrap Firefox with a privileged AutoConfig controller that unloads tabs under configurable MemAvailable hysteresis and exposes an on-demand reclaim command. Enable it by default for Linux GUI homes.
jackos1998