Hello! My problem is that I can't upload videos to Youtube under Firefox! The upload stops at 0 percent and doesn't move. This problem has been going on for a while, it started with version 138.0.4, continued with 139.0. and now even version 139.0.1 is bad! I have Windows 10 64 bit operating system. Video uploading works with other browsers! I would like this problem to be solved! There was a similar case before, and it was fixed.