Yury

After Video Background Play Fix came back in versions 82-84 on Android I tried to listen to YouTube music on my Android 11 phone with FF 84. However, YouTube videos stop playing in the background every 2-5 minutes. When I bring the YouTube tab back to the screen, the page is always blank, like “about: blank”. It's very consistent. I have tested the playback in the foreground of the same videos. No problems. I have tested background playback on my old Android 8 phone with FF 67. No problem. Then, I disabled Video Background Play Fix and was surprised. I came across some weird facts. The FF 84 can play YouTube videos in the background even without this add-on, except for audio albums with multiple audio tracks like in the two examples below: https://www.youtube.com/watch?v=Hfnk8fLNURc&t=2138s https://www.youtube.com/watch?v=F4v45a_N4HY . When I am playing such albums YouTube stops at the end of each track. Pressing the "Play" button resumes playback but stops again at the end of the track. Playing the same albums in the foreground is no problem again. So, I have a few questions. Is this add-on compatible with the version 84? Why am I seeing a blank screen? Why does the version 84 play YouTube without this add-on? Should it? Why does Youtube stop playing audio albums on every track? Thanks, Yury