Youtube Speed Ctrl, Autoplay, Spacebar автор Smartfon

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WARNING: THIS ADDON DOES NOT WORK WITH YOUTUBE'S LATEST (all white) DESIGN. UPDATE COMING SOON.
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1. Disables Autoplay on all YouTube videos. Please keep in mind that this addon needs to be updated every time YouTube changes their main layout, in order for Autoplay OFF to function. Don't hesitate to contact me if it doesn't work.

2. Control YouTube video speeds by using "[" key to play in slow motion, "]" to speed up, "\" to instantly set the speed to default 1x.

Credits: Parts of the addon code was written by drhouse and wxc from Greasefork.com