When I try to play Netflix from my Macbook and onto to my smart TV via my Apple TV device, I find that I can hear the sound but cannot see any picture. The set-up used to work fine until I up-dated to the latest version of the Firefox browser and then the picture disappeared. I have a second Macbook on which I'm running an older version of Firefox (from April'22) and this is still working fine with Netflix/Apple TV connection etc., i.e. picture and sound working well. Has anyone else had this issue.

Btw, I can have both picture and sound on my Macbook screen if I don't connect to Apple TV even when using the latest Firefox version!