I've been using the Firefox android app for a while, and today when I went to go play Youtube through it like i normally do, I turn off my screen, and the browser stop playback and doesn't buffer anything further than when i turned off the screen. When it was working a couple of days ago when I used it, and plenty of times prior, there would be major buffering issues. I would be able to play 1-3 songs (The buffer rates decide how many so it's always random.) before Firefox would stop buffering the video and stop playback overall. Being able to power off my devices screen while i'm listening not only is a big power saver for my devices battery life, but through the Youtube app you can not power down the screen to put it in your pocket without anything in your pocket pressing everything on the screen and just going random places. Through the Youtube app you can NOT turn off the screen without the Youtube app completely halting it's process. If this could be fixed it would be a MAJOR jump for the Firefox app in popularity because people would use it not only as a power saving app for browsing Youtube, but the fact that you can turn off the display on your device while Youtube working would gain a lot of popularity if it WAS an actual feature.