1. Open up an embed of any youtube video 2. [Go to the youtube player settings at the bottom ](https://i.imgur.com/drFaDuS.png) and click playback speed 3. [A white bar should appear to the right side of the embed ](https://i.imgur.com/oStYBO5.png) Only seems to be affecting firefox, I tested on Google Chrome and Chromium and they were both fine.