Recent update of this package caused a problem during start-up, emitting the message:
ERROR: '/usr/bin/iptables-restore -w -n' failed: iptables-restore v1.6.2: iptables-restore: unable to initialize table 'security'
and so on.
I restored the system with a backup of some month ago to solve temporary the problem.
The cause seems that new release of firewalld introduced the definition of "security" table but the kernel have not the module iptable_security on netfilter directory.
Release with the problem
firewalld 0.6.2-1
previous release that work:
firewalld 0.5.1-1