Verified the issue with Firefox 106.0.2 (20221024211236) MSIX from comment 27 on Windows 10x64 21H1 and Windows 11x64 21H1. The [mp3 audio file](https://paul.cx/public/z.mp3) and [AAC audio files](https://www2.iis.fraunhofer.de/AAC/multichannel.html) are played as expected and both `Utility > Generic Audio Decoder` and `Windows Media Framework Audio Decode` are displayed inside about:processes after playing the sound. I will leave this open and reverify this again on 107.0b7 when available and on 106.0.2 once it lands officially on Microsoft Store.
Bug 1796391 Comment 28 Edit History
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Verified the issue with Firefox 106.0.2 (20221024211236) MSIX from comment 27 on Windows 10x64 21H1 and Windows 11x64 21H2. The [mp3 audio file](https://paul.cx/public/z.mp3) and [AAC audio files](https://www2.iis.fraunhofer.de/AAC/multichannel.html) are played as expected and both `Utility > Generic Audio Decoder` and `Windows Media Framework Audio Decode` are displayed inside about:processes after playing the sound. I will leave this open and reverify this again on 107.0b7 when available and on 106.0.2 once it lands officially on Microsoft Store.