Create a new bookmark and set the URL to the javascript:-URL of the speed you want.
Click that link when you want to set a video's (or audio's) speed. In principle it works
with Twitch VODs when using the HTML5 player, but Twitch seems to send data to slow for
2x. 1.5x seems to work for me.
| Speed | URL |
|---|---|
| 0.5x | javascript:document.querySelectorAll("audio,video").forEach(e=>e.playbackRate=0.5);void(0) |
| 1x | javascript:document.querySelectorAll("audio,video").forEach(e=>e.playbackRate=1);void(0) |
| 1.25x | javascript:document.querySelectorAll("audio,video").forEach(e=>e.playbackRate=1.25);void(0) |
| 1.5x | javascript:document.querySelectorAll("audio,video").forEach(e=>e.playbackRate=1.5);void(0) |
| 2x | javascript:document.querySelectorAll("audio,video").forEach(e=>e.playbackRate=2);void(0) |