Problem only occurs when I try to view videos on my facebook wall in Firefox. There is no sound for the video, only a very loud "crepitation". Using Ubuntu 14.
I already tired to reinstall pulseaudio, didn't helped. I tried to clear the cache/cookies/history in Firefox, didn't helped. I tried to reboot the notebook, didn't help.
Question: how can I fix this? Or the solution is to clean install a fresh Ubuntu 15?