As many other have stated, this used to be the best addon for automatically forcing certain Youtube options, but it hasn't been updated for quite a while now and so it's not functioning correctly anymore, which is a shame. Here's hoping the author is is in good health and nothing bad has happened to them, so they can come back and fix it ;)

The add-on is perfect... well it was perfect till few month ago. Got update, and youtube videos does not play hd, max goes up to 720p. I though samthing wrong with firefox it self. Tried everything - compleatley unistalled and installed firefox, put removed and put add-on again. Nathing helped! I didnt even though about addon malfunctioning, i though my pc somthing wrong. I even reinstalled fresh windows, but the issue didnt go away... Till today! I have downloaded another HD add-on, deleted this one, and gues what? Its working! Youtube shows highest quality automaticaly without doing nathing! You need to sort this out, as you lose a lot of users! One of them is me! will use another now till that one brokes :D and may back to this one if it will be softer after few years or not!

It used to be a 5 star addon. But recently Youtube seems to have updated its' functionality and the addon absolutely does not work at all.

instsll adware, spyware, stealing password and personal data. Just a peace of shiiiit!

This addon no longer able to control the video quality and other settings since Youtube always overrides it.

Will there be any updates or fix for this addon in the future?

Not all of the settings for the add-on get saved after being changed. Also, this completely does not work for mobile Firefox.

It just does not work at all anymore. YouTube ignores the default resolutions you set and it ignores the auto-pause feature too. It's really not the authors fault, YouTube's constant updating has made it very hard to keep addons that deal with it up to date and functional. Plus a lot of the things we used to be able to do with YouTube via basic web extensions are just not possible anymore.

USED to be really good..... Now doesn't allow me to play videos without disabling it completely. I like the Auto Pause option but now have to enable default play behavior just to watch videos.... which kind of defeats the purpose of this extension really..... Please make the effort to fix this as I'm not the only person complaining about this!! (Been this way for months now!)

Don't work. Youtube ignore settings like resolution + Miss some settings

Doesn't work on android

This add stops YouTube video's playing embedded on websites that have them, so you are forced to click the view on YouTube link that opens a new window, you can not view it on the website...

I rely on Verizon cellular for my internet, so my purpose for this plugin is to reduce video quality to the standard that VZW's pitiful network will bear. This plugin used to help me to that end, but so far as I can tell it no longer has any effect and it has been quite some time, so I'm downgrading my rating to 1 or 0.

Why the hell my resolution automatically changes to 720p when I have set medium quality? This add-on definitely doesn't work all the time.
Please take care of it.

não tem como usar, com a extensão habilitada os vídeos ficam travados

Was having issues with numerous bugs, but it still at least did what the name says. Tried deleting it's "storage.js" preferences file from my Firefox profile folder in an attempt to fix it and now it doesn't even work at all.

Firefox 56.0.2 sometimes videos on youtube will not unpause if auto-pause is set. Each time i click the video it unpause-repauses. Closing firefox does not fix it.

Does not work out of the box on linux debian stretch.