This is the #1 reason I don't use Firefox for YouTube. Chrome plays back audio smoothly at 4x. Firefox sounds like it's dropping samples after 2x. This might not be problematic for music, but extremely problematic for speech.
I started digging into the Firefox code for playback adjustments. It looks like Firefox uses the SoundTouch library: https://dxr.mozilla.org/mozilla-central/source/media/libsoundtouch/src/RateTransposer.h. I'm not sure if this bug exists upstream.
This is the #1 reason I don't use Firefox for YouTube. Chrome plays back audio smoothly at 4x. Firefox sounds like it's dropping samples after 2x. This might not be problematic for music, but extremely problematic for speech.
I started digging into the Firefox code for playback adjustments. It looks like Firefox uses the SoundTouch library: https:/ /dxr.mozilla. org/mozilla- central/ source/ media/libsoundt ouch/src/ RateTransposer. h. I'm not sure if this bug exists upstream.