Just sharing about of, what is for me the, best player extension for youtube that was down for a while but seems to be working again.
Built to get the most out of YouTube, this extension comes packed with all sorts of features that allow you, among other things, to control the playback speed and the volume level with the mouse wheel, automate repetitive tasks such as selecting the appropriate playback quality, configure dozens of keyboard shortcuts to control YouTube like a pro, and much more... Give it a try! But be aware that you will never want to use YouTube without it again ;)
https://addons.mozilla.org/en-US/firefox/addon/enhancer-for-youtube/
But be aware that you will never want to use YouTube without it again
100% this, I had to clear my firefox for a while and then I was trying to install all extensions again and could not find this bloody extension, I got literally a month to find it again and discovered that was not working cause youtube cannot stop changing it’s UI, imagine my happiness.
When you install it you never use youtube controls again, just the extension.
