Description of problem:
SELinux is preventing /usr/lib64/xulrunner/plugin-container from 'append' accesses on the unix_stream_socket unix_stream_socket.

*****  Plugin mozplugger (91.9 confidence) suggests  *************************

If you want to use the plugin package
Then you must turn off SELinux controls on the Firefox plugins.
Do
# setsebool unconfined_mozilla_plugin_transition 0

*****  Plugin leaks (7.81 confidence) suggests  ******************************

If you want to ignore plugin-container trying to append access the unix_stream_socket unix_stream_socket, because you believe it should not need this access.
Then you should report this as a bug.  
You can generate a local policy module to dontaudit this access.
Do
# grep /usr/lib64/xulrunner/plugin-container /var/log/audit/audit.log | audit2allow -D -M mypol
# semodule -i mypol.pp

*****  Plugin catchall (1.71 confidence) suggests  ***************************

If you believe that plugin-container should be allowed append access on the unix_stream_socket unix_stream_socket by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# grep plugin-containe /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                unconfined_u:unconfined_r:mozilla_plugin_t:s0-s0:c
                              0.c1023
Target Context                system_u:system_r:xdm_t:s0-s0:c0.c1023
Target Objects                unix_stream_socket [ unix_stream_socket ]
Source                        plugin-containe
Source Path                   /usr/lib64/xulrunner/plugin-container
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           xulrunner-21.0-3.fc19.x86_64
Target RPM Packages           
Policy RPM                    selinux-policy-3.12.1-44.fc19.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Permissive
Host Name                     (removed)
Platform                      Linux (removed) 3.9.0-301.fc19.x86_64 #1 SMP Mon
                              Apr 29 13:44:05 UTC 2013 x86_64 x86_64
Alert Count                   25
First Seen                    2013-05-12 09:34:03 IST
Last Seen                     2013-05-19 16:52:53 IST
Local ID                      3b7f7272-42f6-4f8e-a5aa-2a1a3dce9c74

Raw Audit Messages
type=AVC msg=audit(1368962573.426:485): avc:  denied  { append } for  pid=2879 comm="plugin-containe" path="socket:[27786]" dev="sockfs" ino=27786 scontext=unconfined_u:unconfined_r:mozilla_plugin_t:s0-s0:c0.c1023 tcontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tclass=unix_stream_socket


type=SYSCALL msg=audit(1368962573.426:485): arch=x86_64 syscall=execve success=yes exit=0 a0=7f0d55423938 a1=7f0d55423980 a2=7f0d74e04c00 a3=7f0d68ed06e0 items=0 ppid=2826 pid=2879 auid=1000 uid=1000 gid=1000 euid=1000 suid=1000 fsuid=1000 egid=1000 sgid=1000 fsgid=1000 ses=1 tty=(none) comm=plugin-containe exe=/usr/lib64/xulrunner/plugin-container subj=unconfined_u:unconfined_r:mozilla_plugin_t:s0-s0:c0.c1023 key=(null)

Hash: plugin-containe,mozilla_plugin_t,xdm_t,unix_stream_socket,append

audit2allow

#============= mozilla_plugin_t ==============
allow mozilla_plugin_t xdm_t:unix_stream_socket append;

audit2allow -RYou must regenerate interface info by running /usr/bin/sepolgen-ifgen


Additional info:
reporter:       libreport-2.1.4
hashmarkername: setroubleshoot
kernel:         3.9.2-301.fc19.x86_64
type:           libreport