Hmm, it is weird. Added code is not used with current [pref webgl.out-of-process.async-present.force-sync](https://searchfox.org/mozilla-central/rev/54c533e94ae786056a43231f230c7d9b0773cb80/modules/libpref/init/StaticPrefList.yaml#14926).
Bug 1827889 Comment 2 Edit History
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Hmm, it is weird. Added code is not used with current [pref webgl.out-of-process.async-present.force-sync](https://searchfox.org/mozilla-central/rev/54c533e94ae786056a43231f230c7d9b0773cb80/modules/libpref/init/StaticPrefList.yaml#14926). The change used when pref webgl.out-of-process.async-present.force-sync = false. But the pref is true by default in current m-c.