firefox plugins

[Gerhard Magnus]

Recently, all of the video in firefox has stopped working. I assume this
is because I keep letting yum update to the latest version (I'm now on
firefox 1.0.0.14) and something has broken.

In trying to troubleshoot this I'm come to this question: Where does
firefox look for its plugins: /usr/lib/firefox-2.0.0.14/plugins
or /usr/lib/mozilla/plugins? Here are the contents of both directories:

root at PuteB Mon May 05 07:33:19
[355] /usr/lib/firefox-2.0.0.14/plugins $ ls
libflashplayer.so  libnullplugin.so  libunixprintplugin.so

root at PuteB Mon May 05 07:25:25
[353] /usr/lib/mozilla/plugins $ ls
gecko-mediaplayer-dvx.so   libswfdecmozilla.so
gecko-mediaplayer-dvx.xpt  libtotem-basic-plugin.so
gecko-mediaplayer-qt.so    libtotem-basic-plugin.xpt
gecko-mediaplayer-qt.xpt   libtotem-complex-plugin.so
gecko-mediaplayer-rm.so    libtotem-complex-plugin.xpt
gecko-mediaplayer-rm.xpt   libtotem-gmp-plugin.so
gecko-mediaplayer.so       libtotem-gmp-plugin.xpt
gecko-mediaplayer-wmp.so   libtotem-mully-plugin.so
gecko-mediaplayer-wmp.xpt  libtotem-mully-plugin.xpt
gecko-mediaplayer.xpt      libtotem-narrowspace-plugin.so
libflashplayer.so          libtotem-narrowspace-plugin.xpt
libgnashplugin.so          nphelix.so
libjavaplugin.so           nphelix.xpt

Which files should be where? Is there any logic to this system?

Thanks for any insights or suggestions.  --Jerry