I'm using php to launch xvfb with flashplayer:
<?php
shell_exec("xvfb-run /home/myuser/flashplayerdebugger /home/myuser/animations/2016-01-30/Animation.swf");
?>
From terminal it successfully executes. But from browser there is no reaction. Other commands work with shell_exec from web. But not xvfb with flashplayer.