Flash FS Commands do not work with M15. These commands use Active-X or LiveConect to communicate between .swf files and HTML pages.
I don't know the status of plugins calling back to JS. LiveConnect is live and well as far as i can see, but the JS routine is never invoked.
LiveConnect of legacy plugins is not supported in Mozilla. The plugin needs need to be ported to use the new API. see http://www.mozilla.org/docs/plugin.html
[nsbeta2-] Clayton also believes we need to port plugin before testing.
This should be marked as WONTFIX. It's up to Macromedia to port their plugin, isn't it?
removing self from cc list
Since LiveConnect is not supported for existing 4.x binaries marking WONTFIX.