That commit only flips `mousewheel.system_scroll_override.enabled=true` on Linux, so I'm confused about how comment 0 mentions that it's not fixed by flipping it to `false`, but comment 15 does. Anyways, can you confirm that if you use Wayland it works? I believe with X11, even with `MOZ_USE_XINPUT2=1`, we can't differentiate between trackpad / touchscreen scrolling and mousewheel scrolling...
Bug 1757284 Comment 17 Edit History
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That commit only flips `mousewheel.system_scroll_override.enabled=true` on Linux, so I'm confused about how comment 0 mentions that it's not fixed by flipping it to `false`, but comment 15 does. Anyways, can you confirm that if you use Wayland that setting doesn't have an effect on touchpad / trackpad scrolling? I believe with X11, even with `MOZ_USE_XINPUT2=1`, we can't differentiate between trackpad / touchscreen scrolling and mousewheel scrolling...