Gnome3 showed Firefox-bin instead of Firefox in the tasklist; as firefox and firefox-bin are really the same binary just the the first one to execute
#!/bin/sh
# Finds requirements provided outside of the current file set
filelist=$( sed "s/[]['\"*?{}]/\\\\\&/g" )
provides=$( echo "$filelist" | /usr/lib/rpm/find-provides )
echo "$filelist" \
| /usr/lib/rpm/find-requires \
| grep -F -v "$provides" \
| sort -u