I'm on Firefox 103.0.2 64 bit on Windows 10. For the last few months when I play a video of any format that I received as an attachment in Yahoo mail everything works as it should until I play the video. After the video is played from the downloaded file Yahoo mail closes. It always happens this way. I first thought it was Yahoo mail but I have another tab with Edge and Yahoo mail on that browser. It doesn't happen when I use Edge to download the video and play it. I use the same player, VLC, to play the video on both browsers. It has worked fine for years.

I am a big fan of Firefox and have used it as long as it has been out. I have convinced all my friends and relatives to use it as well.