Unstable starts and works of Firefox browser

[Dmitry Postolov]

Hi to all! Sorry for my bad English...

I am faced with unstable startup and works of Firefox browser. Sometimes FF to start OK, but sometimes
the next error message is printed:

The following application experienced an error and needed to close: firefox

(firefox:1516): Gdk-WARNING **: The program 'firefox' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadShmSeg (invalid shared segment parameter)'.
  (Details: serial 391 error_code 128 request_code 130 (MIT-SHM) minor_code 5)
  (Note to programmers: normally, X errors are reported asynchronously;
  that is, you will receive the error a while after causing it.
  To debug your program, run it with the GDK_SYNCHRONIZE environment
  variable to change this behavior. You can then get a meaningful
  backtrace from your debugger if you break on the gdk_x_error() function.)

dfly# uname -a
DragonFly dfly.local 4.5-DEVELOPMENT DragonFly v4.5.0.1231.g2d20d-DEVELOPMENT #0: Mon Jun 20 15:08:38 UTC 2016
root at pkgbox64.dragonflybsd.org:/usr/obj/usr/src/sys/X86_64_GENERIC  x86_64

dfly# pkg info firefox
firefox-47.0_1,1
Name          : firefox
Version        : 47.0_1,1
Installed on  : Tue Jun 21 16:30:08 2016 YEKT
Origin        : www/firefox
Architecture  : dragonfly:4.6:x86:64
Prefix        : /usr/local
Categories    : ipv6 www
Licenses      :
Maintainer    : gecko at FreeBSD.org
WWW            : http://www.mozilla.com/firefox
Comment        : Web browser based on the browser portion of Mozilla
Options        :
ALSA          : on
BUNDLED_CAIRO  : on
CANBERRA      : off
DBUS          : on
DEBUG          : off
FFMPEG        : on
GCONF          : off
GIO            : on
GNOMEUI        : off
GTK2          : off
GTK3          : on
INTEGER_SAMPLES: off
LIBPROXY      : off
OPTIMIZED_CFLAGS: on
PGO            : off
PROFILE        : off
PULSEAUDIO    : off
RUST          : on
TEST          : off
Annotations    :
cpe            : cpe:2.3:a:mozilla:firefox:47.0:::::dragonfly4:x86_64:1
no_provide_shlib: yes
repo_type      : binary
repository    : Avalon
Flat size      : 95.2MiB