Shockwave Flash - /usr/lib/flashplugin-installer/libflashplayer.so
Skype Buttons for Kopete - /usr/lib/mozilla/plugins/skypebuttons.so (kopete)
IcedTea-Web Plugin (using IcedTea-Web 1.4 (1.4-3ubuntu2)) - /usr/lib/jvm/java-7-openjdk-amd64/jre/lib/amd64/IcedTeaPlugin.so (icedtea-7-plugin)
VLC Multimedia Plugin (compatible Videos 3.8.2) - /usr/lib/mozilla/plugins/libtotem-cone-plugin.so (totem-mozilla)
QuickTime Plug-in 7.6.6 - /usr/lib/mozilla/plugins/libtotem-narrowspace-plugin.so (totem-mozilla)
Windows Media Player Plug-in 10 (compatible; Videos) - /usr/lib/mozilla/plugins/libtotem-gmp-plugin.so (totem-mozilla)
DivX® Web Player - /usr/lib/mozilla/plugins/libtotem-mully-plugin.so (totem-mozilla)
iTunes Application Detector - /usr/lib/mozilla/plugins/librhythmbox-itms-detection-plugin.so (rhythmbox-mozilla)