If this is related to the Baseline H264 change then could you try with the following pref `media.navigator.video.disable_h264_baseline` and set it to true. Grabbing another profile with the pref might be useful as well. Maybe try enabling the profiler before even having the ring tab open.
Bug 1898579 Comment 10 Edit History
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If this is related to the Baseline H264 change then could you try with the following pref `media.navigator.video.disable_h264_baseline` and set it to true. Grabbing another profile with the pref might be useful as well. Maybe try enabling the profiler before even having the ring tab open. Are there any console errors as well when this happens?