the greasemonkey extension fails to run the script "YouTube Player Controls" https://greasyfork.org/en/scripts/16323-youtube-player-controls correctly turning all settings to true for some reason
Because it uses deprecated synchronous GM_set/getValue which cannot work with QtWebEngine (it doesn't work either in Firefox).
seems to work fine with tampermonkey on firefox, but ok, i guess thats why they seem to be slowly losing users to tampermonkey and violentmonkey