SELinux is preventing /usr/lib64/nspluginwrapper/npviewer.bin from 'write' accesses on the file /root/.mozilla/firefox/h0i7vsgx.default/.parentlock.

I believe both suggestions are wrong, however I could not get an nsplugin_home_t context on the file with

semanage fcontext -a -t nsplugin_home_t \
  'HOME_DIR/\.mozilla/firefox(/[^/]*)/\.parentlock'

Something like that should work though.

*****  Plugin leaks (50.5 confidence) suggests  ******************************

If you want to ignore npviewer.bin trying to write access the .parentlock file, 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/nspluginwrapper/npviewer.bin /var/log/audit/audit.log | audit2allow -D -M mypol
# semodule -i mypol.pp

*****  Plugin catchall (50.5 confidence) suggests  ***************************

If you believe that npviewer.bin should be allowed write access on the .parentlock file 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 npviewer.bin /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                unconfined_u:unconfined_r:nsplugin_t:s0-s0:c0.c102
                              3
Target Context                unconfined_u:object_r:admin_home_t:s0
Target Objects                /root/.mozilla/firefox/h0i7vsgx.default/.parentloc
                              k [ file ]
Source                        npviewer.bin
Source Path                   /usr/lib64/nspluginwrapper/npviewer.bin
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           nspluginwrapper-1.3.0-16.fc15
Target RPM Packages           
Policy RPM                    selinux-policy-3.9.12-8.fc15
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux playground.usersys.redhat.com
                              2.6.37-2.fc15.x86_64 #1 SMP Fri Jan 7 14:57:36 UTC
                              2011 x86_64 x86_64
Alert Count                   1
First Seen                    Wed 19 Jan 2011 02:52:05 PM CET
Last Seen                     Wed 19 Jan 2011 02:52:05 PM CET
Local ID                      36664d05-c26a-495f-a993-ee07a479521f

Raw Audit Messages
type=AVC msg=audit(1295445125.861:123): avc:  denied  { write } for  pid=8665 comm="npviewer.bin" path="/root/.mozilla/firefox/h0i7vsgx.default/.parentlock" dev=sda10 ino=134696 scontext=unconfined_u:unconfined_r:nsplugin_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:admin_home_t:s0 tclass=file


type=AVC msg=audit(1295445125.861:123): avc:  denied  { read write } for  pid=8665 comm="npviewer.bin" path="/root/.mozilla/firefox/h0i7vsgx.default/places.sqlite-shm" dev=sda10 ino=134707 scontext=unconfined_u:unconfined_r:nsplugin_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:admin_home_t:s0 tclass=file


type=AVC msg=audit(1295445125.861:123): avc:  denied  { read } for  pid=8665 comm="npviewer.bin" path="/root/.mozilla/firefox/h0i7vsgx.default/XUL.mfasl" dev=sda10 ino=134704 scontext=unconfined_u:unconfined_r:nsplugin_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:admin_home_t:s0 tclass=file


type=AVC msg=audit(1295445125.861:123): avc:  denied  { read write } for  pid=8665 comm="npviewer.bin" path="/root/.mozilla/firefox/h0i7vsgx.default/Cache/_CACHE_MAP_" dev=sda10 ino=134719 scontext=unconfined_u:unconfined_r:nsplugin_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:admin_home_t:s0 tclass=file


type=AVC msg=audit(1295445125.861:123): avc:  denied  { read write } for  pid=8665 comm="npviewer.bin" path="/root/.mozilla/firefox/h0i7vsgx.default/Cache/_CACHE_001_" dev=sda10 ino=134737 scontext=unconfined_u:unconfined_r:nsplugin_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:admin_home_t:s0 tclass=file


type=AVC msg=audit(1295445125.861:123): avc:  denied  { read write } for  pid=8665 comm="npviewer.bin" path="/root/.mozilla/firefox/h0i7vsgx.default/Cache/_CACHE_002_" dev=sda10 ino=134738 scontext=unconfined_u:unconfined_r:nsplugin_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:admin_home_t:s0 tclass=file


type=AVC msg=audit(1295445125.861:123): avc:  denied  { read write } for  pid=8665 comm="npviewer.bin" path="/root/.mozilla/firefox/h0i7vsgx.default/Cache/_CACHE_003_" dev=sda10 ino=134739 scontext=unconfined_u:unconfined_r:nsplugin_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:admin_home_t:s0 tclass=file


type=AVC msg=audit(1295445125.861:123): avc:  denied  { read write } for  pid=8665 comm="npviewer.bin" path="/root/.mozilla/firefox/h0i7vsgx.default/cookies.sqlite-shm" dev=sda10 ino=134741 scontext=unconfined_u:unconfined_r:nsplugin_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:admin_home_t:s0 tclass=file


type=SYSCALL msg=audit(1295445125.861:123): arch=x86_64 syscall=execve success=yes exit=0 a0=13c9290 a1=13c95e0 a2=13c68e0 a3=0 items=0 ppid=8145 pid=8665 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=1 comm=npviewer.bin exe=/usr/lib64/nspluginwrapper/npviewer.bin subj=unconfined_u:unconfined_r:nsplugin_t:s0-s0:c0.c1023 key=(null)

Hash: npviewer.bin,nsplugin_t,admin_home_t,file,write

audit2allow

#============= nsplugin_t ==============
allow nsplugin_t admin_home_t:file { write read };

audit2allow -R

#============= nsplugin_t ==============
allow nsplugin_t admin_home_t:file { write read };