AppearanceYoutube Speed Ctrl, Autoplay, SpacebarSmartfonAUTOPLAY & SPACEBAR TWEAK DOES NOT WORK WITH UPCOMING YOUTUBE ALL-WHITE REDESIGN YET. IT WORKS WITH THE CURRENT DESIGN. Disables YouTube Autoplay. Spacebar pauses the video. Control video speeds: [ = slower ] = faster \ = defaultScreenshots from Mozilla Add-ons