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Disable autoplay have no effect, clean restart was tested. Definetly not the extension which should be on top right now because other extensions offer by magnitude better set of improvements.

Won't work many times.

Es fantástico....todo 100% mejorado.

Youtube no longer supports the setPlaybackQuality API call which i assume this addon uses, so it no longer works.

Doesn't work on restart of firefox

Does not work in any version of the firefox browser.

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.

did not actually work. videos still loaded at normal size and 360p despite my settings saying theater mode and 1080p

doesn't change videos to high resolution.

I've tried a every couple of months for past few years, never worked. I use stable branch.