Skype Buttons for Kopete - /usr/lib/mozilla/plugins/skypebuttons.so (kopete)
Shockwave Flash - /usr/lib/flashplugin-installer/libflashplayer.so
Gnome Shell Integration - /usr/lib/mozilla/plugins/libgnome-shell-browser-plugin.so (gnome-shell)
IcedTea-Web Plugin (using IcedTea-Web 1.5 (1.5-1ubuntu1)) - /usr/lib/jvm/java-7-openjdk-amd64/jre/lib/amd64/IcedTeaPlugin.so (icedtea-7-plugin)
Shockwave Flash - /usr/lib/lightspark/liblightsparkplugin.so (browser-plugin-lightspark)
LibreOffice Plug-in - /usr/lib/libreoffice/program/libnpsoplugin.so (mozilla-libreoffice)
VLC Web Plugin - /usr/lib/mozilla/plugins/libvlcplugin.so (browser-plugin-vlc)