Currently buggy with latest firefox update, won't let me chose other than 1080p, maybe only me, might update the rating later.

So I set the add-on to hold 720p with limiting 30fps
and it does the job.
Then I switch on YT player to 1080p(HD)and it allows me to do so, but no way back to default 720p setting preference. Not even if I disable add-on and reload the tab or go to another video. That's nasty annoying sticky sнiт!.. 🤬
...
March 19 2024
And now it completely dead crap...

Works as advertised, and great for saving bandwidth (i assume, because of reduced bandwidth) for videos on the background, used for music.

To test: once you set it up to change videos to your preferred quality -- try setting a youtube video to different quality, then refresh (quality will auto-change to extension's preference).

It would be easier to use if there was a tool bar button + option to disable video. My use case: attempting to save bandwidth... This extension actually works better for my use case: Audio Only for YouTube™ |

Does nothing

does not work

Works great.

It does not change the quality.

So far so good. Was constantly fighting with Youtube over the quality settings when watching a video. Now that's over with. No more having to change settings 2 or 3 times during a video.
Thanks