Greasy Fork is available in English.
Adds quality change buttons below the video (144p, 240p, 360p, 480p, 720p, 1080p...) works on mobile (m.youtube.com) and on desktop.
< Feedback on YouTube.com quality change buttons (Mobile / Desktop)
Thank you for your feedback, updated once again, and now it works on phone, tablet and desktop. Please update and test.
It worked on the phone before the update. Also not working on pad (android)