Description of problem:
SELinux is preventing /usr/lib/nspluginwrapper/npviewer.bin from 'create' accesses on the file C:\nppdf32Log\debuglog.txt.

*****  Plugin mozplugger (99.1 confidence) suggests   ************************

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

*****  Plugin catchall (1.81 confidence) suggests   **************************

If you believe that npviewer.bin should be allowed create access on the C:\nppdf32Log\debuglog.txt 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:mozilla_plugin_t:s0-s0:c
                              0.c1023
Target Context                unconfined_u:object_r:user_home_dir_t:s0
Target Objects                C:\nppdf32Log\debuglog.txt [ file ]
Source                        npviewer.bin
Source Path                   /usr/lib/nspluginwrapper/npviewer.bin
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           nspluginwrapper-1.4.4-19.fc20.i686
Target RPM Packages           
Policy RPM                    selinux-policy-3.12.1-106.fc20.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 3.12.5-302.fc20.x86_64 #1 SMP Tue
                              Dec 17 20:42:32 UTC 2013 x86_64 x86_64
Alert Count                   2
First Seen                    2013-12-29 08:48:00 CET
Last Seen                     2013-12-29 08:48:00 CET
Local ID                      f83945d3-94c8-43b0-a161-464ec7f83303

Raw Audit Messages
type=AVC msg=audit(1388303280.659:495): avc:  denied  { create } for  pid=1896 comm="npviewer.bin" name="C:\nppdf32Log\debuglog.txt" scontext=unconfined_u:unconfined_r:mozilla_plugin_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_dir_t:s0 tclass=file


type=SYSCALL msg=audit(1388303280.659:495): arch=i386 syscall=fstat per=8 success=no exit=EACCES a0=f634e93a a1=441 a2=1b6 a3=93d8390 items=0 ppid=1807 pid=1896 auid=1000 uid=1000 gid=1000 euid=1000 suid=1000 fsuid=1000 egid=1000 sgid=1000 fsgid=1000 ses=1 tty=(none) comm=npviewer.bin exe=/usr/lib/nspluginwrapper/npviewer.bin subj=unconfined_u:unconfined_r:mozilla_plugin_t:s0-s0:c0.c1023 key=(null)

Hash: npviewer.bin,mozilla_plugin_t,user_home_dir_t,file,create

Additional info:
reporter:       libreport-2.1.10
hashmarkername: setroubleshoot
kernel:         3.12.5-302.fc20.x86_64
type:           libreport

Potential duplicate: bug 812566