#44352  snow hookRequest window retention -- Firefox 153.0 headless
N=8 windows/arm  15x Cu.forceGC()+Cu.forceCC()  single chrome-context call
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arm canary  alive/opened       reporters     census      census        shortestPath
    (per-object liveness)      detached B    Window n    Window bytes  to live doc
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A2  8 / 8                      945,536       11          72,824        harness frame only
B2  6 / 8                      1,654,112     17          110,216       harness frame only
P   8 / 8  <- must be 8        1,886,656     19          122,680       harness frame only
Z   0 / 8  <- must be 0        945,536       11          72,824        n/a (none alive)
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controls: P=8/8 Z=0/8 -> run is VALID
canary   : A2 8 vs B2 6 -> DISCRIMINATES (A2 retains more)
reporters: A2 - B2 = -708576 B -> wrong direction -- noise, not signal
           calibration: P vs B2 differ by 232,544 B = 8 x 29,068 B/document,
           so the reporter does resolve a held document -- and reads -708576 B for A2.
census   : A2 - B2 = -37392 B -> wrong direction -- noise, not signal