When installing leap all O.K. 
I have an old user identity. When I copy over the libreoffice files etc.
WITHOUT taking over ANY hidden files, just normal user created ones the sound
on the following pages stop:
http://www.archchinese.com/chinese_english_dictionary.html

link to the sound is: 
javascript:fn_playSound('0'); 
It is the "sound" button under the character. 


With 13.2 I had the same problem . Then I did reinstall all gstreamer files and
forced update of all browser files. Now it did work just in Konqueror at the
end. 
Then I did install from scratch Leap. 
It did work, I copied over my files: does not work anymore in FF and Seamonkey.
I tried to get an error output: nothing. 
I am not able to get sound but Konqueror and Chromium work. 
So I am determined to understand what does cause this, as this is a constant
problem. I also eliminated .mozilla : same result, no sound. 

Every help debugging this is really appreciated as it makes the use of FF and
Seamonkey impossible for this kind of sites. And if there is something that
copied over brakes sound in FF I would really like to know. 

P.S. when looking at the pulseaudio sound settings there is: Applicatons
playing audio: shows no application when playing that link with FF while
Chromium shows correctly. So this seems to be a bug on how pulseaudio sets up
sound for FF and Seamonkey? What hidden setting could be copied
unintentionally?