Java(TM) Plug-in 10.40.2 - /usr/lib/jvm/java-7-oracle/jre/lib/amd64/libnpjp2.so
Java(TM) Plug-in 11.0.2 - /usr/lib/jvm/java-8-oracle/jre/lib/amd64/libnpjp2.so
Shockwave Flash - /usr/lib/adobe-flashplugin/libflashplayer.so (adobe-flashplugin)
Gnome Shell Integration - /usr/lib/mozilla/plugins/libgnome-shell-browser-plugin.so (gnome-shell)
RealPlayer 9 - /usr/lib/mozilla/plugins/gecko-mediaplayer-rm.so (gecko-mediaplayer)
DivX Browser Plug-In - /usr/lib/mozilla/plugins/gecko-mediaplayer-dvx.so (gecko-mediaplayer)
QuickTime Plug-in 7.6.9 - /usr/lib/mozilla/plugins/gecko-mediaplayer-qt.so (gecko-mediaplayer)
mplayerplug-in is now gecko-mediaplayer 1.0.8 - /usr/lib/mozilla/plugins/gecko-mediaplayer.so (gecko-mediaplayer)
Windows Media Player Plug-in - /usr/lib/mozilla/plugins/gecko-mediaplayer-wmp.so (gecko-mediaplayer)
DjView-4.9 - /usr/lib/mozilla/plugins/nsdejavu.so (djview-plugin)
VLC Web Plugin - /usr/lib/mozilla/plugins/libvlcplugin.so (browser-plugin-vlc)
MozPlugger 1.14.5 handles QuickTime and Windows Media Player Plugin - /usr/lib/mozilla/plugins/mozplugger.so (mozplugger)