Why is my Google Chrome browser muted completely all of a sudden? I tried watching some videos on youtube but its completely silent, of course i checked, the volume on the youtube videos were all the way up. And also CBS, NBC, i tried watching videos there too, silent too. Again, of course, the computer system volume is not muted, safari, and itunes are working just fine. Please tell me how to fix this? Thank you! I have the newest mountain lion.