Note added to 89 nightly nites with this wording and a linki to MDN, thanks: >The [Event Timing API][1] is now supported. [1]: https://developer.mozilla.org/docs/Web/API/PerformanceEventTiming
Bug 1701029 Comment 7 Edit History
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Note added to 89 nightly release notes with this wording and a linki to MDN, thanks: >The [Event Timing API][1] is now supported. [1]: https://developer.mozilla.org/docs/Web/API/PerformanceEventTiming