Description of problem:
This always happens when I finish watching a Youtube video on Firefox and get back to another page on Youtubue. I'm using HTML5 on Youtube but I think It loads Flash in background to fallback to. I've disabled Flash completely from Firefox and the problem had disappeard (but this is not the solution).

I've tried the proposed commands of audit2allow and semodule but they have failed:

# semodule -i abrt.pp
libsemanage.semanage_direct_install_info: Overriding abrt module at lower priority 100 with module at priority 400.
Failed to resolve typeattributeset statement at 2 of /var/lib/selinux/targeted/tmp/modules/400/abrt/cil
Failed to resolve ast
semodule:  Failed!
SELinux is preventing abrt-hook-ccpp from 'getattr' accesses on the file /usr/lib64/firefox/plugin-container.

*****  Plugin catchall (100. confidence) suggests   **************************

If you believe that abrt-hook-ccpp should be allowed getattr access on the plugin-container 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 abrt-hook-ccpp /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                system_u:system_r:abrt_dump_oops_t:s0
Target Context                system_u:object_r:mozilla_plugin_exec_t:s0
Target Objects                /usr/lib64/firefox/plugin-container [ file ]
Source                        abrt-hook-ccpp
Source Path                   abrt-hook-ccpp
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    <Unknown>
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 4.2.3-300.fc23.x86_64 #1 SMP Mon
                              Oct 5 15:42:54 UTC 2015 x86_64 x86_64
Alert Count                   2
First Seen                    2015-11-07 14:42:22 EET
Last Seen                     2015-11-07 14:49:29 EET
Local ID                      64fbde55-483a-47bd-9584-cbbb61dc2cdc

Raw Audit Messages
type=AVC msg=audit(1446900569.161:2448): avc:  denied  { getattr } for  pid=8972 comm="abrt-hook-ccpp" path="/usr/lib64/firefox/plugin-container" dev="sda2" ino=139326 scontext=system_u:system_r:abrt_dump_oops_t:s0 tcontext=system_u:object_r:mozilla_plugin_exec_t:s0 tclass=file permissive=0


Hash: abrt-hook-ccpp,abrt_dump_oops_t,mozilla_plugin_exec_t,file,getattr


Additional info:
reporter:       libreport-2.6.3
hashmarkername: setroubleshoot
kernel:         4.2.3-300.fc23.x86_64
type:           libreport

Potential duplicate: bug 1276644