Freshplayer coredump bt

           PID: 11392 (plugin-containe)
           UID: 1000 (kalinda)
           GID: 1000 (kalinda)
        Signal: 11 (SEGV)
     Timestamp: Mon 2015-09-21 21:59:27 EDT (1min 3s ago)
  Command Line: /usr/lib/firefox/plugin-container /usr/lib/mozilla/plugins/libfreshwrapper-pepperflash.so -greomni /usr/lib/firefox/omni.ja -appomni /usr/lib/firefox/browser/omni.ja -appdir /usr/lib/firefox/browser 11184 plugin
    Executable: /usr/lib/firefox/plugin-container
 Control Group: /user.slice/user-1000.slice/session-c2.scope
          Unit: session-c2.scope
         Slice: user-1000.slice
       Session: c2
     Owner UID: 1000 (kalinda)
       Boot ID: 37542b3119e54a91b899623bb6d158f6
    Machine ID: 0d7e83acd89e4d7a99dc9b0ebd42dca0
      Hostname: Tardis
      Coredump: /var/lib/systemd/coredump/core.plugin-containe.1000.37542b3119e54a91b899623bb6d158f6.11392.1442887167000000.lz4
       Message: Process 11392 (plugin-containe) of user 1000 dumped core.

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Reading symbols from /usr/lib/firefox/plugin-container...(no debugging symbols found)...done.

warning: core file may not match specified executable file.
[New LWP 11392]
[New LWP 11393]

warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
Core was generated by `/usr/lib/firefox/plugin-container /usr/lib/mozilla/plugins/libfreshwrapper-pepp'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x0000556b74ea7f7f in mozilla::SandboxEarlyInit(GeckoProcessType, bool) ()
[Current thread is 1 (Thread 0x7f0ef657a9c0 (LWP 11392))]
(gdb) set logging on
Copying output to gdb.txt.
(gdb) thread apply all bt

Thread 2 (Thread 0x7f0ee10ff700 (LWP 11393)):
#0  0x00007f0ef6235428 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007f0ee6529c24 in ?? () from /usr/lib/libGL.so.1
#2  0x00007f0ee2feec16 in ?? () from /usr/lib/libnvidia-glcore.so.352.41
#3  0x00007f0ee6529d0c in ?? () from /usr/lib/libGL.so.1
#4  0x00007f0ef622f4a4 in start_thread () from /usr/lib/libpthread.so.0
#5  0x00007f0ef134913d in clone () from /usr/lib/libc.so.6

Thread 1 (Thread 0x7f0ef657a9c0 (LWP 11392)):
#0  0x0000556b74ea7f7f in mozilla::SandboxEarlyInit(GeckoProcessType, bool) ()
#1  0x0000556b74e67beb in ?? ()
#2  0x00007f0ef1280610 in __libc_start_main () from /usr/lib/libc.so.6
#3  0x0000556b74e67599 in _start ()