Hello, When I open Firefox, it seems like it does not does anything, but then it starts playing a music I was hearing in youtube earlier (like it seems to me that the window is opened somewhere outside of my screen?? If I click a second time in Firefox, then it opens a normal window in my screen as usual, but the other one keeps playing in the back. I've tried changing screen resolutions, checked that no other monitors were detected, restarted computer, Not sure what to do next! Thanks!