Description: On Twitch streams, after pausing and resuming playback, an old audio track (often the very first segment of the stream or a heavily delayed buffer) gets overlaid on top of the current live audio/video track, or completely replaces it.
Steps to Reproduce:
Open any live stream on Twitch using Firefox (version 158 or higher).
Pause the stream for a short moment.
Resume playback.
Observe the audio overlap or incorrect audio segment playing.
Environment & Troubleshooting Tried:
Firefox Versions: 158+ (affects all recent versions).
Forks: Reproduced on Firefox-based forks as well.
Extensions: Occurs with all extensions disabled (Troubleshooting Mode) and enabled.
Hardware Acceleration: Reproduced with both hardware acceleration enabled and disabled.
Low Latency Mode: Reproduced with Twitch low-latency mode both enabled and disabled.
Due to these tests, it appears to be an engine-level media/audio regression.
Impact: Watching live streams on Twitch has become practically impossible on Firefox. This severely degrades the day-to-day user experience and forces users to look for alternative browsers. Please investigate and fix this media pipeline regression.
