Hello everyone,
Mozila Firefox again presented in its "best light" :evil:

https://bugzilla.mozilla.org/show_bug.cgi?id=1345661
https://bugs.launchpad.net/ubuntu/+sour ... ug/1671273

For those who have removed forever pulseaudio of their systems..
Solution can be found here:
https://github.com/i-rinat/apulse

Older versions of apulse not working, but the latest version of the code works well.
Compiled latest binary version for Ubuntu 16.04 :

https://www.sendspace.com/file/drus9u

1.Copy and paste the contents of the folder in your system.
2.Start Firefox with command --> apulse firefox %u or replace command in command starter.

/usr/share/applications/Firefox Web Brouser.desktop --> open with gedit --> ...

Best regards :)