Well, it doesn't work the way I expected. Instead of selecting the high resolution that is available in the video, the extension is fixed at a specific quality. Also, I don't need any other changes like player size or speed, I need YouTube to handle this on their own. But instead, this extension either locks the video at the settings you specified, or doesn't work at all.

Working ONLY in desktop mode. Only plays default 360 mode in mobile. Note 20 Ultra 5G system and browser fully updated.

Seems to have stopped working. Used to work great, not sure what has changed but needs an update.

This add-on doesn't work most of the time. HD icon just stops responding and also the add-on itself. This happens several times per day. Restarting Firefox doesn't help. The add-on only starts working again if I disable it and enable it, which is annoying to do. Then it works for some time and stops working again. I'm using Firefox 119.

Using it for a long long time. Sadly, since the last update and as mentioned by others, I have to disable and enable it again everytime I start my browser, otherwise it's not working.

After doing so, it will work until you fully close the browser.

With fixing this, I'll give it a full 5-Star because it's just so usefull.

Oct/23
Every time I start the browser I have to disable and then re-enable the add on, otherwise the icon in the task bar is non responsive. This was not happening when I installed the addon.

07/26/24
Edit:
The problem mentioned above is still not fixed.
Additionally:
Now the enabled option "Auto expand video description box" lets the screen jump to the expanded description box instead of staying focused on the video.

Still usable.

Doesn't work.

Doesn't work

My default resolution is 1080p, I want all videos to be played by default in 1080p, even when I watch a individual video in 1440p or 2160p, I want videos watched after that to default to 1080p, but this add-on is not performing that function. When I play a video in 1440p or 2160p, all the videos I play after that also play in 1440p or 2160p.Very disappointing.

This has worked for me in the past with intermittent issues setting the playback speed. The September update completely broke it for me. I am using this with Firefox on Android.

On mobile it's awkward, you need to click and scroll 3 times to press the add-on button, it's less without the extension in YouTube.