Auto-landscape and buffering

 I am facing a issue that if i am using youtube.com  on firefox android on one tab and then create a new tab and search on google something then come back to youtube it goes in landscape mode automatically. Please fix this and it also buffers a lot also fix that it make experience less appealing.
                                      Thank you.

Hi, Firefox team, I am facing a issue that if i am using youtube.com on firefox android on one tab and then create a new tab and search on google something then come back to youtube it goes in landscape mode automatically. Please fix this and it also buffers a lot also fix that it make experience less appealing. Thank you.