Bugzilla

Those revisions match what I've got in comment 31.  Just to be extra sure, could you try running this from command-line mozregression (if you've got that available), just to launch and test each build as a one-off?

Please confirm that this one is "good"
`mozregression  --pref "general.smoothScroll.msdPhysics.enabled:true"  --launch 2022-04-07`

and this one is "bad":
`mozregression  --pref "general.smoothScroll.msdPhysics.enabled:true"  --launch 2022-04-08`

(This will run with a fresh profile with the msdPhysics pref already flipped.)

Based on your GUI run, we'd expect the -07 one to be "good" and the -08 one to be "bad", but per comment 32 - 33 that also doesn't make a lot of sense, so it'd be good to double-check.

Thanks!

Those revisions match what I've got in comment 31.  Just to be extra sure, could you try running this from command-line mozregression (if you've got that available), just to launch and test each build as a one-off?

Please confirm that this one is "good"
`mozregression  --pref "general.smoothScroll.msdPhysics.enabled:true"  --launch 2022-04-07`

and this one is "bad":
`mozregression  --pref "general.smoothScroll.msdPhysics.enabled:true"  --launch 2022-04-08`

(This will run with a fresh profile with the msdPhysics pref already flipped.)

Based on your GUI run, we'd expect the -07 one to be "good" and the -08 one to be "bad", but per comment 32 - comment 33 that also doesn't make a lot of sense, so it'd be good to double-check.

Thanks!