Gene Heskett wrote:

> Greetings all;
> 
> I can see that its installed and should be calling kaffeine to service a
> quite wide range of video formats.
> 
YoutTube goes with flashplayer: 
https://helpx.adobe.com/flash/kb/supported-codecs-flash-player.html

> Unfortunately, while kaffeine is installed and runs for other digital
> than tv broadcast, neither firefox is actually calling it.  So while I
> can see videos, some on cnn, and some on nbc news in firefox's postcard
> sized video, nothing that I have been able to add, will call up kaffeine
> to play a youtube video.  If I launch a copy and have it running, it
> seems to me that firefox should pass the data stream to the running copy
> of kaffeine.
> 

write in your url: about:plugins and check the output

> But its not happening, no reaction from kaffeine can be obtained from
> either version of firefox.
> 
> So I installed the gxine launcher plugin. Looks like an identical list of
> acceptable video formats to that of kaffeine.
> 

Perhaps because kaffeine uses the same xine software?

> Is there an about:config option to be set so this works?  What else do I
> need to check?

Tools -> AddOns -> Plugins

you can manage whatever you have installed

regards