Says I can choose 144p as default but it only goes to "Tiny" which is 360p.

Extension is broken.

Opening a video with this enabled causes the whole page to scroll down 1 line automatically, cutting off the top of the video. This means that if Im playing a game with autoplay on my side monitor, I have to alt-tab for every new video just to scroll back up.

THe PC version works well enough, no complaints there. But the Android version for Firefox (84.1.1, Build 2015781795) is useless since I can't find any way to change the settings.
And since it looks like the developer has abandoned this and there's no support on his webpage, my 2 stars are being generous.

Beeld kwaliteit is goed , maar het stop op de haverklap. Jammer.

It works just fine most of the time. But sometimes it automatically downgrades the quality setting, and if I try to set again my desired quality, the YouTube video player begins to blink and I have to either reload that YouTube video webpage or restart the web browser.

Takes me to posts for some reason, when I click on a video

Please support - playing youtube video in background

Replicates theater mode and full screen mode from Youtube. The only useful feature is auto quality change, but takes forever to load. Doesn't work for non-SD videos.

Seems to be totally broken. Youtube loads a strange blog view that constantly jumps up and down all the time. I only wanted to stop the autoplay feature in Youtube and show videos in 1080p by default.

When I open a YouTube video link it changes the resolution (does what it proposes). But when I open the YouTube homepage, it redirects me to a random YouTube post and keeps reloading the page. So I can't use YouTube's homepage

Apparently this bug is at least one year old, deducting from old comments.

Using Firefox 77.0.1 (64-bits) at Windows 10 Pro 1909

For some reason I was not able to save any settings.

after install HD, ADs starts play on youtbe. Maybe dont coop with AdBlock.

Please fix this bug.
https://reddit.com/r/firefox/comments/aesm24/youtube_redirecting_to_a_channel/

buenas noches podre recibir notas solo en idioma español gracias

This extension does what it promises and more. It allows you to change how the description is presented, disable annotations and more.
But it has a very, very annoying but when loading YouTube's homepage. It often goes on an infinite loop, reloading the page and making it unusable. This bug is new and I had to uninstall the extension and try something else. Fix the bug and I will give you fivev stars.