Sometimes buggy on Android: settings for the video pops up briefly at the start of playback before automatically disappearing. Also sometimes screws up when opening video from my YouTube history - redirects to my YouTube subscriptions instead of the video page I wanted to load (Firefox Nightly for Android). Edit: Still this addon is very useful on Android, as it is the only working one that lets one set YouTube playback quality. Please kindly allow this again to be installed on Android. Edit 2: seems to have gotten worse on Android and m.youtube.com, pops up the video settings every time I make the video time jump to another point, and also sometimes even seems to trigger a redirect to a different video.

it does what it says, but there's a really annoying "support YTHD" button next to the subscribe button/channel name that cuts off the channel name most of the time.

Sirve pero ultimamente genera un problema con el hud de youtube, al adelantar se abre la configuracion y no te permite seguir avanzando el video.

Works good by why are you reenabling the video size option against my will?! 5U!

It does what it's supposed to; however, it's often inconsistent, so you need to refresh the page everytime for it to work. If you move the progress bar the slightest bit, the page on YouTube will freeze for quite a while.