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.