About two day ago my U Tube started not showing the normal size player but it shows one similar to the picture in picture. The sound is working fine. This is happening all three of my WIN10 computers when I use Firefox. If I go to MS Edge or Opera the U Tubes run just fine.

I hate both of those browsers and have used Firefox for years but I use U Tube a lot and I need a fix.

I am thinking that the latest Firefox update was about the time this started happening but I am not sure.