If this is only an issue with audio—which seems to be the case—then I vote we hack it at the primary call site for `Start()` in *InitializeAsync*. The other place we call it, for mute/unmute shouldn't need changing. Basically: pick a specific error code, and check for it [here](https://searchfox.org/mozilla-central/rev/b756e6d00728dda4121f8278a744381d8643317a/dom/media/MediaManager.cpp#4136) and if it matches, wait 200 ms and try again. If we do that, we should use a [timer](https://searchfox.org/mozilla-central/rev/b756e6d00728dda4121f8278a744381d8643317a/dom/base/nsDOMNavigationTiming.cpp#452-460)—maybe make a nice `media::Wait(200)` function that returns a MozPromise? And not [jank](https://searchfox.org/mozilla-central/rev/b756e6d00728dda4121f8278a744381d8643317a/dom/media/MediaManager.cpp#2179).
Bug 1546865 Comment 6 Edit History
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If this is only an issue with audio—which seems to be the case—then I vote we hack it at the primary call site for `Start()` in *InitializeAsync*. The other place we call it, for mute/unmute shouldn't need changing. Basically: pick a specific error code, and check for it [here](https://searchfox.org/mozilla-central/rev/b756e6d00728dda4121f8278a744381d8643317a/dom/media/MediaManager.cpp#4136) and if it matches, wait 200 ms and try one more time before giving up. If we do that, we should use a [timer](https://searchfox.org/mozilla-central/rev/b756e6d00728dda4121f8278a744381d8643317a/dom/base/nsDOMNavigationTiming.cpp#452-460)—maybe make a nice `media::Wait(200)` function that returns a MozPromise? And not [jank](https://searchfox.org/mozilla-central/rev/b756e6d00728dda4121f8278a744381d8643317a/dom/media/MediaManager.cpp#2179).