Audio Crackle/Stutter on Udemy/Youtube
I've dug deep around the internet for this and seem to find variations on this issue throughout Firefox' history going back many years. I've found articles that detail problems similar to mine dating back 5+ years.
Essentially, when I increase the playback speed on videos, most notably on Udemy but also on other sites like Youtube or Twitch, after a few seconds and sometimes a few minutes, the sound begins to crackle. The same thing happens when I switch tabs from one video and switch back to the video playback tab.
I've eliminated internet connection speeds (tried in three different locations with two different computers) as a potential issue, tried tweaking multiple settings in the about:config section, enabled/disabled various windows services and enabled/disabled hardware acceleration and tried safe mode with all extensions disabled. This issue does not happen in Chrome or Edge on either of my two machines. This is purely isolated to Firefox.
I've tried every fix I could find with no resolution. I love Mozilla and the what the company stands for and would love to continue using the product, but the constant crackling as I'm trying to learn new skills is on the verge of driving me crazy. It would seem that such a fundamental HTML5 concept as video playback would be well tested and well engineered in Firefox, but as I mentioned, I'm seeing the same issue on multiple machines in multiple environments.
Any additional help anyone has to offer would be much appreciated.
Please see the following on fixing sound issues on Firefox:
Hope I helped!
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