> Apple Quicktime is NOT installed (I have no need for it).
Nor I.
> there was a bug reported in FF 22 that apparently was fixed
I believe that to be a general "audio" breakage, irrespective of anything else, like Plugins that may also be required for playback.
> Sample page in bug ... when pressing on either of the buttons I get "A plugin is
> needed to display this content
Again, that bug was a general breakage in "audio".
Once the bug was fixed, "audio" would again play.
But there could be other requirements, like having a Plugin to effect the actual playback.
> Windows Media Player Plugin doesn't support audio/x-wav Mime type which is why it doesn't play it
Correct.
application/x-ms-wmp (np-mswmp: *),
application/asx (*),
video/x-ms-asf-plugin (*),
application/x-mplayer2 (*),
video/x-ms-asf (asf,asx,*),
video/x-ms-wm (wm,*),
audio/x-ms-wma (wma,*),
audio/x-ms-wax (wax,*),
video/x-ms-wmv (wmv,*),
video/x-ms-wvx (wvx,*)
It
is possible to playback "wav" in Mozilla, via html5.
HTML5 Audio Formats Test