If run by a user with a narrow umask such as 077, any files generated by running mozilla-plugin-config are readable only by root (ie. owner root, permissions -rwx------), thus the user can't actually use them, and nor can anyone else. It should set sensible file permissions on such files and not rely on the user's umask setting. To reproduce: umask 077 /usr/bin/mozilla-plugin-config -i -f
added to rawhide - nspluginwrapper-1.1.2-2.fc10