about:telemetry incorrectly reports gfx.features.compositor as none (under Environment Data/System). This is caused by NotifyCompositorCreated not firing at . In my testing, mWindowType is always `eWindowType_child`. E10s is disabled.  - https://dxr.mozilla.org/mozilla-central/source/widget/nsBaseWidget.cpp#1284
Might be skewing your telemetry data results.
Looks like a bug, thanks. Luckily it shouldn't skew our results since we only graph Windows compositors, and this bug looks OS X specific.
Assignee: nobody → dvander
Status: NEW → ASSIGNED
2 years ago
Priority: -- → P3
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