Comment 6 for bug 56085

right, the issue was due to .mozilla, thank you for the pointer

The plugin should be fixed for firefox too with that update:

" totem (1.5.91-1ubuntu2) edgy; urgency=low
 .
   * debian/totem-mozilla.links:
     - make links for firefox too
   * debian/rules:
     - use "-V 'libtotem-plparser1 (>= 1.5.1)'" for the dh_makeshlibs call
     - use "-L libtotem-plparser1 -l debian/libtotem-plparser1/usr/lib"
       for the dh_shlibdeps call"