I've tried other highly Youtube improvement extensions here on add-on store. While this has less stuff you can do this does have what I mostly wanted. A big reason why I prefer this over others is while you can't customize the site. This extension hasn't once frozen my videos or randomly stop playing them while I multitask on other tabs witch frustrated me about them. I applied the same settings I was allowed to this extension and still no problems. If I could ask for 1 thing I would wish for a Sound Booster. Overall i will continue to use this and hope updates do continue.