F22 : No sound from firefox or chrome

[sean darcy]

On F22 XFCE. Sound works with the XFCE media player Parole. But I get no 
sound from firefox, chrome or midori (the XFCE browser).

But - I do get sound from the TOR browser. ???

PulseAudio Manager shows as clients:

Chrome input
CubebUtils  - which has a firefox icon next to it

Any help appreciated.

sean