When youtube plays vr video (not 360!, at least on FF 56.0) youtube show left frame on top and half of right one below it.
if i add exception
@@||youtube.com/get_video_info?*
it shows video correctly, but it allow ads to get trough.Correct me if I'm wrong, but i believe my best bet to turn off adblock for vr videos.
https://preview.ibb.co/ieBX6G/yt_vr.png