Oom-killer close firefox and then X restarted

Hi everybody!
I'm using Arch for couple of years and never experience this kind of problem.
A week or two ago my XFCE session start to close at a random time (but everytime it's when screen locked and XScreensaver runing).
When it happen, system redirects me to SLIM. This situation continue to happen every day (1 or 2 times in a day).
And every time I saw in logs same picture: oom-killer shutdown firefox and then X server restarted.
I don't understand where to search for solution and what process make a problem.
Maybe it's normal situation?
Journalctl:
Jul 06 19:03:15 ywork kernel: kthreadd invoked oom-killer: gfp_mask=0x3000d0, order=2, oom_score_adj=0
Jul 06 19:03:15 ywork kernel: kthreadd cpuset=/ mems_allowed=0
Jul 06 19:03:15 ywork kernel: CPU: 3 PID: 2 Comm: kthreadd Not tainted 3.15.3-1-ARCH #1
Jul 06 19:03:15 ywork kernel: Hardware name: MSI MS-7677/H61I-E35 (MS-7677), BIOS V5.2 09/16/2011
Jul 06 19:03:15 ywork kernel: 0000000000000000 00000000b1ea7b21 ffff880139e17ae8 ffffffff81508141
Jul 06 19:03:15 ywork kernel: ffff8800981cd180 ffff880139e17b60 ffffffff81507937 ffffffff81069d36
Jul 06 19:03:15 ywork kernel: ffff880139e17b50 ffffffff810cf90c 000000000001bf6c 00000000b1ea7b21
Jul 06 19:03:15 ywork kernel: Call Trace:
Jul 06 19:03:15 ywork kernel: [<ffffffff81508141>] dump_stack+0x4d/0x6f
Jul 06 19:03:15 ywork kernel: [<ffffffff81507937>] dump_header+0xad/0x235
Jul 06 19:03:15 ywork kernel: [<ffffffff81069d36>] ? put_online_cpus+0x56/0x90
Jul 06 19:03:15 ywork kernel: [<ffffffff810cf90c>] ? rcu_oom_notify+0xdc/0x110
Jul 06 19:03:15 ywork kernel: [<ffffffff8114396c>] oom_kill_process+0x26c/0x3f0
Jul 06 19:03:15 ywork kernel: [<ffffffff810730e5>] ? has_ns_capability_noaudit+0x35/0x50
Jul 06 19:03:15 ywork kernel: [<ffffffff8114422b>] out_of_memory+0x52b/0x580
Jul 06 19:03:15 ywork kernel: [<ffffffff81149cdd>] __alloc_pages_nodemask+0xb3d/0xb50
Jul 06 19:03:15 ywork kernel: [<ffffffff81066fc8>] copy_process.part.30+0x168/0x1bd0
Jul 06 19:03:15 ywork kernel: [<ffffffff810981aa>] ? finish_task_switch+0x4a/0xf0
Jul 06 19:03:15 ywork kernel: [<ffffffff81509909>] ? __schedule+0x3b9/0x980
Jul 06 19:03:15 ywork kernel: [<ffffffff8108d320>] ? kthread_create_on_node+0x1b0/0x1b0
Jul 06 19:03:15 ywork kernel: [<ffffffff81068bf7>] do_fork+0xc7/0x3f0
Jul 06 19:03:15 ywork kernel: [<ffffffff81068f46>] kernel_thread+0x26/0x30
Jul 06 19:03:15 ywork kernel: [<ffffffff8108de0a>] kthreadd+0x19a/0x1f0
Jul 06 19:03:15 ywork kernel: [<ffffffff8108dc70>] ? kthread_create_on_cpu+0x60/0x60
Jul 06 19:03:15 ywork kernel: [<ffffffff81515e3c>] ret_from_fork+0x7c/0xb0
Jul 06 19:03:15 ywork kernel: [<ffffffff8108dc70>] ? kthread_create_on_cpu+0x60/0x60
Jul 06 19:03:15 ywork kernel: Mem-Info:
Jul 06 19:03:15 ywork kernel: Node 0 DMA per-cpu:
Jul 06 19:03:15 ywork kernel: CPU 0: hi: 0, btch: 1 usd: 0
Jul 06 19:03:15 ywork kernel: CPU 1: hi: 0, btch: 1 usd: 0
Jul 06 19:03:15 ywork kernel: CPU 2: hi: 0, btch: 1 usd: 0
Jul 06 19:03:15 ywork kernel: CPU 3: hi: 0, btch: 1 usd: 0
Jul 06 19:03:15 ywork kernel: Node 0 DMA32 per-cpu:
Jul 06 19:03:15 ywork kernel: CPU 0: hi: 186, btch: 31 usd: 0
Jul 06 19:03:15 ywork kernel: CPU 1: hi: 186, btch: 31 usd: 0
Jul 06 19:03:15 ywork kernel: CPU 2: hi: 186, btch: 31 usd: 0
Jul 06 19:03:15 ywork kernel: CPU 3: hi: 186, btch: 31 usd: 0
Jul 06 19:03:15 ywork kernel: Node 0 Normal per-cpu:
Jul 06 19:03:15 ywork kernel: CPU 0: hi: 186, btch: 31 usd: 0
Jul 06 19:03:15 ywork kernel: CPU 1: hi: 186, btch: 31 usd: 0
Jul 06 19:03:15 ywork kernel: CPU 2: hi: 186, btch: 31 usd: 0
Jul 06 19:03:15 ywork kernel: CPU 3: hi: 186, btch: 31 usd: 0
Jul 06 19:03:15 ywork kernel: active_anon:246237 inactive_anon:621077 isolated_anon:0
Jul 06 19:03:15 ywork kernel: Node 0 DMA free:14912kB min:272kB low:340kB high:408kB active_anon:12kB inactive_anon:60kB active_file:20kB inactive_file:64kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15984kB managed:15360kB mlocked:0kB dirty:0kB writeback:0kB mapped:20kB shmem:64kB slab_reclaimable:24kB slab_unreclaimable:32kB kernel_stack:0kB pagetables:4kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:143 all_unreclaimable? yes
Jul 06 19:03:15 ywork kernel: lowmem_reserve[]: 0 2702 3663 3663
Jul 06 19:03:15 ywork kernel: Node 0 DMA32 free:75460kB min:49656kB low:62068kB high:74484kB active_anon:673788kB inactive_anon:1909132kB active_file:1288kB inactive_file:1212kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:2844888kB managed:2770232kB mlocked:0kB dirty:136kB writeback:0kB mapped:40612kB shmem:1939388kB slab_reclaimable:21108kB slab_unreclaimable:14228kB kernel_stack:3472kB pagetables:17772kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:3770 all_unreclaimable? yes
Jul 06 19:03:15 ywork kernel: lowmem_reserve[]: 0 0 960 960
Jul 06 19:03:15 ywork kernel: Node 0 Normal free:28864kB min:17648kB low:22060kB high:26472kB active_anon:311148kB inactive_anon:575116kB active_file:456kB inactive_file:436kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:1046528kB managed:983860kB mlocked:0kB dirty:32kB writeback:0kB mapped:20664kB shmem:591764kB slab_reclaimable:10208kB slab_unreclaimable:8572kB kernel_stack:2000kB pagetables:4832kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:1420 all_unreclaimable? yes
Jul 06 19:03:15 ywork kernel: lowmem_reserve[]: 0 0 0 0
Jul 06 19:03:15 ywork kernel: Node 0 DMA: 4*4kB (EM) 3*8kB (UEM) 1*16kB (M) 1*32kB (E) 0*64kB 4*128kB (UEM) 2*256kB (EM) 3*512kB (UEM) 2*1024kB (EM) 3*2048kB (EMR) 1*4096kB (M) = 14936kB
Jul 06 19:03:15 ywork kernel: Node 0 DMA32: 9633*4kB (UEM) 3125*8kB (UEM) 487*16kB (UEM) 15*32kB (UEM) 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 2*2048kB (MR) 0*4096kB = 75900kB
Jul 06 19:03:15 ywork kernel: Node 0 Normal: 4912*4kB (UEMR) 646*8kB (UEM) 8*16kB (UM) 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 2*2048kB (M) 0*4096kB = 29040kB
Jul 06 19:03:15 ywork kernel: Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
Jul 06 19:03:15 ywork kernel: 633584 total pagecache pages
Jul 06 19:03:15 ywork kernel: 0 pages in swap cache
Jul 06 19:03:15 ywork kernel: Swap cache stats: add 0, delete 0, find 0/0
Jul 06 19:03:15 ywork kernel: Free swap = 0kB
Jul 06 19:03:15 ywork kernel: Total swap = 0kB
Jul 06 19:03:15 ywork kernel: 976850 pages RAM
Jul 06 19:03:15 ywork kernel: 0 pages HighMem/MovableOnly
Jul 06 19:03:15 ywork kernel: 15667 pages reserved
Jul 06 19:03:15 ywork kernel: 0 pages hwpoisoned
Jul 06 19:03:15 ywork kernel: [ pid ] uid tgid total_vm rss nr_ptes swapents oom_score_adj name
Jul 06 19:03:15 ywork kernel: [ 169] 0 169 8104 199 16 0 -1000 systemd-udevd
Jul 06 19:03:15 ywork kernel: [ 241] 0 241 18414 411 37 0 0 cupsd
Jul 06 19:03:15 ywork kernel: [ 243] 81 243 6272 154 17 0 -900 dbus-daemon
Jul 06 19:03:15 ywork kernel: [ 245] 0 245 3802 71 12 0 0 systemd-logind
Jul 06 19:03:15 ywork kernel: [ 253] 0 253 2284 30 9 0 0 agetty
Jul 06 19:03:15 ywork kernel: [ 259] 0 259 10003 148 24 0 -1000 sshd
Jul 06 19:03:15 ywork kernel: [ 265] 0 265 6308 181 15 0 0 nginx
Jul 06 19:03:15 ywork kernel: [ 266] 33 266 6416 298 16 0 0 nginx
Jul 06 19:03:15 ywork kernel: [ 268] 88 268 49166 2801 36 0 -200 postgres
Jul 06 19:03:15 ywork kernel: [ 271] 124 271 72782 556 43 0 0 colord
Jul 06 19:03:15 ywork kernel: [ 283] 88 283 49202 368 35 0 -200 postgres
Jul 06 19:03:15 ywork kernel: [ 284] 88 284 49166 215 32 0 -200 postgres
Jul 06 19:03:15 ywork kernel: [ 285] 88 285 49166 215 29 0 -200 postgres
Jul 06 19:03:15 ywork kernel: [ 286] 88 286 49379 527 35 0 -200 postgres
Jul 06 19:03:15 ywork kernel: [ 287] 88 287 13121 238 28 0 -200 postgres
Jul 06 19:03:15 ywork kernel: [ 289] 1000 289 6680 133 17 0 0 systemd
Jul 06 19:03:15 ywork kernel: [ 290] 1000 290 18907 454 36 0 0 (sd-pam)
Jul 06 19:03:15 ywork kernel: [ 306] 102 306 127823 3080 47 0 0 polkitd
Jul 06 19:03:15 ywork kernel: [ 317] 1000 317 20560 74 14 0 0 gpg-agent
Jul 06 19:03:15 ywork kernel: [ 362] 0 362 73271 323 43 0 0 upowerd
Jul 06 19:03:15 ywork kernel: [ 394] 0 394 88766 399 37 0 0 udisksd
Jul 06 19:03:15 ywork kernel: [ 1126] 0 1126 36649 3012 73 0 0 slim
Jul 06 19:03:15 ywork kernel: [ 1130] 0 1130 693549 19259 442 0 0 X
Jul 06 19:03:15 ywork kernel: [ 1158] 0 1158 9125 70 20 0 0 systemd-journal
Jul 06 19:03:15 ywork kernel: [ 1159] 1000 1159 3701 105 12 0 0 sh
Jul 06 19:03:15 ywork kernel: [ 1168] 1000 1168 85751 878 104 0 0 xfce4-session
Jul 06 19:03:15 ywork kernel: [ 1171] 1000 1171 3988 40 11 0 0 dbus-launch
Jul 06 19:03:15 ywork kernel: [ 1172] 1000 1172 6339 234 18 0 0 dbus-daemon
Jul 06 19:03:15 ywork kernel: [ 1175] 1000 1175 8832 149 23 0 0 xfconfd
Jul 06 19:03:15 ywork kernel: [ 1178] 1000 1178 46226 998 94 0 0 xfwm4
Jul 06 19:03:15 ywork kernel: [ 1180] 1000 1180 150652 3199 155 0 0 Thunar
Jul 06 19:03:15 ywork kernel: [ 1181] 1000 1181 112635 1367 135 0 0 xfce4-panel
Jul 06 19:03:15 ywork kernel: [ 1183] 1000 1183 135547 907 131 0 0 xfdesktop
Jul 06 19:03:15 ywork kernel: [ 1184] 1000 1184 86729 523 96 0 0 xfsettingsd
Jul 06 19:03:15 ywork kernel: [ 1185] 1000 1185 242579 5902 279 0 0 pidgin
Jul 06 19:03:15 ywork kernel: [ 1186] 1000 1186 525975 8475 256 0 0 fatrat
Jul 06 19:03:15 ywork kernel: [ 1189] 1000 1189 45048 428 91 0 0 panel-6-systray
Jul 06 19:03:15 ywork kernel: [ 1191] 1000 1191 121749 1334 137 0 0 panel-8-mixer
Jul 06 19:03:15 ywork kernel: [ 1192] 1000 1192 70044 2322 107 0 0 xfce4-xkb-plugi
Jul 06 19:03:15 ywork kernel: [ 1193] 1000 1193 89225 690 109 0 0 panel-2-actions
Jul 06 19:03:15 ywork kernel: [ 1194] 1000 1194 62836 380 90 0 0 xfce4-power-man
Jul 06 19:03:15 ywork kernel: [ 1202] 1000 1202 53845 189 38 0 0 gvfsd
Jul 06 19:03:15 ywork kernel: [ 1212] 1000 1212 89368 215 41 0 0 gvfsd-fuse
Jul 06 19:03:15 ywork kernel: [ 1221] 1000 1221 74114 870 48 0 0 gvfs-udisks2-vo
Jul 06 19:03:15 ywork kernel: [ 1228] 1000 1228 237008 3561 174 0 0 kactivitymanage
Jul 06 19:03:15 ywork kernel: [ 1231] 1000 1231 52642 235 38 0 0 gvfs-mtp-volume
Jul 06 19:03:15 ywork kernel: [ 1235] 1000 1235 48334 218 31 0 0 gvfs-gphoto2-vo
Jul 06 19:03:15 ywork kernel: [ 1238] 1000 1238 11086 96 27 0 0 gconfd-2
Jul 06 19:03:15 ywork kernel: [ 1242] 1000 1242 68582 692 35 0 0 gvfs-afc-volume
Jul 06 19:03:15 ywork kernel: [ 1253] 1000 1253 91846 220 47 0 0 gvfsd-trash
Jul 06 19:03:15 ywork kernel: [ 1276] 1000 1276 13921 201 33 0 0 xscreensaver
Jul 06 19:03:15 ywork kernel: [ 1290] 1000 1290 42367 658 71 0 0 kdeinit4
Jul 06 19:03:15 ywork kernel: [ 1292] 1000 1292 48114 651 75 0 0 klauncher
Jul 06 19:03:15 ywork kernel: [ 1294] 1000 1294 85937 1524 150 0 0 kded4
Jul 06 19:03:15 ywork kernel: [ 1311] 1000 1311 127865 3034 129 0 0 xfce4-terminal
Jul 06 19:03:15 ywork kernel: [ 1326] 1000 1326 2095 30 10 0 0 gnome-pty-helpe
Jul 06 19:03:15 ywork kernel: [ 1327] 1000 1327 4286 163 14 0 0 bash
Jul 06 19:03:15 ywork kernel: [ 1333] 1000 1333 499084 16624 230 0 0 dropbox
Jul 06 19:03:15 ywork kernel: [ 1411] 1000 1411 563317 144054 1074 0 0 firefox
Jul 06 19:03:15 ywork kernel: [ 1428] 1000 1428 65369 136 29 0 0 at-spi-bus-laun
Jul 06 19:03:15 ywork kernel: [ 2161] 1000 2161 29243 5408 61 0 0 python
Jul 06 19:03:15 ywork kernel: [ 2286] 1000 2286 4286 159 14 0 0 bash
Jul 06 19:03:15 ywork kernel: [ 2405] 1000 2405 4286 154 15 0 0 bash
Jul 06 19:03:15 ywork kernel: [ 2561] 1000 2561 4261 154 14 0 0 bash
Jul 06 19:03:15 ywork kernel: [ 2584] 1000 2584 4261 154 13 0 0 bash
Jul 06 19:03:15 ywork kernel: [ 5026] 1000 5026 9512 166 21 0 0 ssh
Jul 06 19:03:15 ywork kernel: [ 5027] 1000 5027 4261 155 13 0 0 bash
Jul 06 19:03:15 ywork kernel: [ 5031] 1000 5031 8993 163 21 0 0 ssh
Jul 06 19:03:15 ywork kernel: [ 5033] 1000 5033 4286 158 14 0 0 bash
Jul 06 19:03:15 ywork kernel: [ 5034] 1000 5034 4286 156 15 0 0 bash
Jul 06 19:03:15 ywork kernel: [19098] 1000 19098 125365 7789 80 0 0 python
Jul 06 19:03:15 ywork kernel: [21995] 1000 21995 4261 156 13 0 0 bash
Jul 06 19:03:15 ywork kernel: [24288] 1000 24288 2931 41 11 0 0 telnet
Jul 06 19:03:15 ywork kernel: [24576] 1000 24576 26828 120 24 0 0 gvfsd-metadata
Jul 06 19:03:15 ywork kernel: [25229] 1000 25229 36167 1813 68 0 0 atunnel
Jul 06 19:03:15 ywork kernel: Out of memory: Kill process 1411 (firefox) score 154 or sacrifice child
Jul 06 19:03:15 ywork kernel: Killed process 1411 (firefox) total-vm:2253268kB, anon-rss:576216kB, file-rss:0kB
Jul 06 19:03:15 ywork org.gtk.vfs.Daemon[1172]: g_dbus_connection_real_closed: Remote peer vanished with error: Underlying GIOStream returned 0 bytes on an async read (g-io-error-quark, 0). Exiting.
Jul 06 19:03:15 ywork org.gtk.Private.UDisks2VolumeMonitor[1172]: g_dbus_connection_real_closed: Remote peer vanished with error: Underlying GIOStream returned 0 bytes on an async read (g-io-error-quark, 0). Exiting.
Jul 06 19:03:15 ywork org.gtk.Private.MTPVolumeMonitor[1172]: g_dbus_connection_real_closed: Remote peer vanished with error: Underlying GIOStream returned 0 bytes on an async read (g-io-error-quark, 0). Exiting.
Jul 06 19:03:15 ywork org.gtk.Private.GPhoto2VolumeMonitor[1172]: g_dbus_connection_real_closed: Remote peer vanished with error: Underlying GIOStream returned 0 bytes on an async read (g-io-error-quark, 0). Exiting.
Jul 06 19:03:15 ywork org.gtk.Private.AfcVolumeMonitor[1172]: g_dbus_connection_real_closed: Remote peer vanished with error: Underlying GIOStream returned 0 bytes on an async read (g-io-error-quark, 0). Exiting.
Jul 06 19:03:15 ywork org.a11y.Bus[1172]: g_dbus_connection_real_closed: Remote peer vanished with error: Underlying GIOStream returned 0 bytes on an async read (g-io-error-quark, 0). Exiting.
Jul 06 19:03:15 ywork org.gtk.vfs.Daemon[1172]: A connection to the bus can't be made
Jul 06 19:03:15 ywork org.gtk.vfs.Daemon[1172]: g_dbus_connection_real_closed: Remote peer vanished with error: Underlying GIOStream returned 0 bytes on an async read (g-io-error-quark, 0). Exiting.
Jul 06 19:03:17 ywork slim[25239]: /usr/bin/xauth: file /var/run/slim.auth does not exist
Jul 06 19:03:17 ywork slim[25239]: X.Org X Server 1.15.2
Jul 06 19:03:17 ywork slim[25239]: Release Date: 2014-06-27
Jul 06 19:03:17 ywork slim[25239]: X Protocol Version 11, Revision 0
Jul 06 19:03:17 ywork slim[25239]: Build Operating System: Linux 3.15.1-1-ARCH x86_64
Jul 06 19:03:17 ywork slim[25239]: Current Operating System: Linux ywork 3.15.3-1-ARCH #1 SMP PREEMPT Tue Jul 1 07:32:45 CEST 2014 x86_64
Jul 06 19:03:17 ywork slim[25239]: Kernel command line: BOOT_IMAGE=/boot/vmlinuz-linux root=UUID=aefe66a8-5324-48f7-a3c6-d56ec050a912 rw quiet
Jul 06 19:03:17 ywork slim[25239]: Build Date: 27 June 2014 07:32:26PM
Jul 06 19:03:17 ywork slim[25239]: Current version of pixman: 0.32.4
Jul 06 19:03:17 ywork slim[25239]: Before reporting problems, check http://wiki.x.org
Jul 06 19:03:17 ywork slim[25239]: to make sure that you have the latest version.
Jul 06 19:03:17 ywork slim[25239]: Markers: (--) probed, (**) from config file, (==) default setting,
Jul 06 19:03:17 ywork slim[25239]: (++) from command line, (!!) notice, (II) informational,
Jul 06 19:03:17 ywork slim[25239]: (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
Jul 06 19:03:17 ywork slim[25239]: (==) Log file: "/var/log/Xorg.0.log", Time: Sun Jul 6 19:03:17 2014
Jul 06 19:03:17 ywork slim[25239]: (==) Using config directory: "/etc/X11/xorg.conf.d"
Jul 06 19:03:17 ywork slim[25239]: (==) Using system config directory "/usr/share/X11/xorg.conf.d"
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension Generic Event Extension
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension SHAPE
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension MIT-SHM
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension XInputExtension
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension XTEST
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension BIG-REQUESTS
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension SYNC
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension XKEYBOARD
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension XC-MISC
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension SECURITY
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension XINERAMA
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension XFIXES
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension RENDER
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension RANDR
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension COMPOSITE
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension DAMAGE
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension MIT-SCREEN-SAVER
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension DOUBLE-BUFFER
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension RECORD
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension DPMS
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension Present
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension DRI3
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension X-Resource
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension XVideo
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension XVideo-MotionCompensation
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension XFree86-VidModeExtension
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension XFree86-DGA
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension XFree86-DRI
Jul 06 19:03:17 ywork slim[25239]: Initializing built-in extension DRI2
Jul 06 19:03:18 ywork slim[25239]: Loading extension GLX
Jul 06 19:05:21 ywork slim[25239]: pam_unix(slim:session): session opened for user yman by (uid=0)
Any advice would be appreciated.

Today I've got same system behavior, but no out of memory now, rather X got bus error and restart.
Jul 07 02:28:43 ywork slim[25239]: (EE)
Jul 07 02:28:49 ywork slim[25239]: (EE) Backtrace:
Jul 07 02:29:07 ywork slim[25239]: (EE) 0: /usr/bin/X (xorg_backtrace+0x56) [0x58f186]
Jul 07 02:29:11 ywork slim[25239]: (EE) 1: /usr/bin/X (0x400000+0x192fc9) [0x592fc9]
Jul 07 02:29:19 ywork slim[25239]: (EE) 2: /usr/lib/libpthread.so.0 (0x7ff5f9962000+0xf4b0) [0x7ff5f99714b0]
Jul 07 02:29:25 ywork slim[25239]: (EE) 3: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7ff5f31d6000+0x25306) [0x7ff5f31fb306]
Jul 07 02:29:28 ywork slim[25239]: (EE) 4: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7ff5f31d6000+0x26584) [0x7ff5f31fc584]
Jul 07 02:29:34 ywork slim[25239]: (EE) 5: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7ff5f31d6000+0x103629) [0x7ff5f32d9629]
Jul 07 02:30:36 ywork slim[25239]: (EE) 6: /usr/bin/X (0x400000+0x15ea73) [0x55ea73]
Jul 07 02:30:37 ywork slim[25239]: (EE) 7: /usr/bin/X (0x400000+0x15f843) [0x55f843]
Jul 07 02:30:37 ywork slim[25239]: (EE) 8: /usr/bin/X (DRI2GetBuffersWithFormat+0xb) [0x55fc8b]
Jul 07 02:30:37 ywork slim[25239]: (EE) 9: /usr/bin/X (0x400000+0x16172b) [0x56172b]
Jul 07 02:30:37 ywork slim[25239]: (EE) 10: /usr/bin/X (0x400000+0x36b2f) [0x436b2f]
Jul 07 02:30:37 ywork slim[25239]: (EE) 11: /usr/bin/X (0x400000+0x3ad16) [0x43ad16]
Jul 07 02:30:37 ywork slim[25239]: (EE) 12: /usr/lib/libc.so.6 (__libc_start_main+0xf0) [0x7ff5f85cf000]
Jul 07 02:30:37 ywork slim[25239]: (EE) 13: /usr/bin/X (0x400000+0x250fe) [0x4250fe]
Jul 07 02:30:37 ywork slim[25239]: (EE)
Jul 07 02:30:37 ywork slim[25239]: (EE) Bus error at address 0x7ff53f6a3000
Jul 07 02:30:37 ywork slim[25239]: (EE)
Jul 07 02:30:37 ywork slim[25239]: Fatal server error:
Jul 07 02:30:37 ywork slim[25239]: (EE) Caught signal 7 (Bus error). Server aborting
Jul 07 02:30:37 ywork slim[25239]: (EE)
Jul 07 02:30:37 ywork slim[25239]: (EE)
Jul 07 02:30:37 ywork slim[25239]: Please consult the The X.Org Foundation support
Jul 07 02:30:37 ywork slim[25239]: at http://wiki.x.org
Jul 07 02:30:37 ywork slim[25239]: for help.
Jul 07 02:30:37 ywork slim[25239]: (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
Jul 07 02:30:37 ywork slim[25239]: (EE)
But there nothing about this error in Xorg log.

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== This happened ==
Every time Firefox opened
== a couple of months ago

Hello Brian.
You don't need to restart your computer to open Firefox again: you just need to close it manually through your application manager (CTRL+SHIFT+ESC in Processes tab). Anyway, hopefully this support article is what you need:
http://support.mozilla.com/en-US/kb/Firefox+hangs
What's probably happening is that you may be having a problem with some Firefox add-on that is hindering your Firefox's normal behavior. Have you tried disabling all add-ons (just to check), to see if Firefox goes back to normal?
Whenever you have a problem with Firefox, whatever it is, you should make sure it's not coming from one of your installed add-ons, be it an extension, a theme or a plugin. To do that easily and cleanly, run Firefox in [http://support.mozilla.com/en-US/kb/Safe+Mode safe mode] and select ''Disable all add-ons''. If the problem disappears, you know it's from an add-on. Disable them all in normal mode, and enable them one at a time until you find the source of the problem. See [http://support.mozilla.com/en-US/kb/Troubleshooting+extensions+and+themes this article] for information about troubleshooting extensions and theme. You can troubleshoot plugins the same way.
If you want support for one of your add-ons, you'll need to contact its author.

After I close Firefox and then return to open it my computer says that it is still running and needs to be closed or the system restarted. How do I resolve this?

Question
After I close Firefox and then return to open it my computer says that it is still running and needs to be closed or the system restarted. How do I resolve this? edit

See this - [https://support.mozilla.com/en-US/kb/Firefox%20hangs#w_firefox-hangs-when-you-quit-it Firefox hangs when you close it]

When I close Firefox and try to restart it, my system thinks it's still running, and I must reboot in order to start Firefox 3.6.11.

When I close Firefox and try to restart it, my system thinks it's still running, and I must reboot in order to start Firefox 3.6.11. I'm running Windows Vista and this is the only program that has this problem. Another symptom is the program does not show up in my recently used programs list nor is it in the task list once I've closed it, though Windows will not open it because it thinks it's still running.

I am also using Windows Vista 64 bit and have the same problem..what i do is instead of rebooting the computer press CTRL ALT and DELETE key. start the task manager and go to the Process tab and look for firefox .exe click on it and hit the end process tab. close that window and firefox should run... and this problem started when i upgraded to firefox 3.6.12
If anyone has a permanent solution please post.

When I close firefox and then open, all my tabs disapear.

When I close Firefox and then open Firefox all my tabs disapear.
== This happened ==
Every time Firefox opened
== I first set up a tab.

Tools > Options > General|Main > Startup: "When Firefox Starts": "Show my windows and tabs from last time"
If you use [[Clear Recent History]] in Firefox 3.5 and later or [[Clearing private data|Clear Private Data]] in Firefox 3 to clear the 'Browsing History' when Firefox is closed then restoring tabs from the last session ("Save & Quit" or "Show my windows and tabs from last time") doesn't work.

When I close Firefox and then try to open it, it says it is already running and I have to close it which I can't do. The only way to open it is to first restart my computer which is a pain. If I can't fix this I will use an other brouser!

I am not sure what more I can tell you. I close firefox. So when I click on the icon it should allow me to open it again but I get a message that says it is already running. Either close it out which I can't do since I already did that or restart the computer.

Try holding control, alt and delete down in succession and then a dialogue box will appear with windows task manager. Once open click on the Processes Tab and look for firefox.exe. Highlight this and then click end process. It should come up with a warning but just click Yes. This should then close firefox and allow you to reopen it from your desktop without shutting down your computer. Hope this helps.

Everytime I close Firefox and then try to reopen it, it says that I am unable to do so as Firefox is already running (even though it's closed) and I have to restart my laptop all the time.

For about a week now when I have closed Firefox down then I try to reopen it the screen message states that Firefox is already running and I have to restart my laptop every time. This is becoming very frustrating and time-consuming.

I have the same problem on my notebook but I don't restart. Just do the control, alt, delete and bring up your task manager. Then scroll down to Firefox, end process and close. Now you should be able to restart FF. Not a fix but better than having to restart your laptop.

When i close firefox and then attempt to restart it i get the following message. firefox is alreadt running,but is not responding to open a new window.you must first close the existing firefox process or restart your system.

i have to restart

Sounds like Firefox is "hanging at exit". That problem is frequently caused by an Extension or a Plugin. Read all of the following articles.<br /><br />
#Stop the Firefox process:
#*[http://kb.mozillazine.org/Kill_application Mozillazine - Kill application]
#*Windows 7 users click [http://www.techrepublic.com/blog/window-on-windows/reap-the-benefits-of-windows-7s-task-manager/2576 here]
#*Mac users: http://techheavy.com/2011/02/the-mac-task-manager/
#Why Firefox may hang:
#*[http://support.mozilla.com/en-US/kb/Firefox+hangs Firefox hangs] (see Hang at exit)
#*[http://kb.mozillazine.org/Firefox_hangs Firefox hangs (Mozillazine)] (see Hang at exit and Closing Firefox properly)
#*[https://support.mozilla.com/en-US/kb/Firefox+is+already+running+but+is+not+responding Firefox is already running but is not responding]
#Use Firefox Safe Mode to find a problem with an Extension or Plugin:
#*Don't check anything when entering Safe Mode, just continue
#*If the problem does not occur in Safe Mode it is probably and Extension or Plugin causing the problem
#*See:
#**[[Safe Mode]] and [http://kb.mozillazine.org/Safe_Mode Safe Mode (Mozillazine)]
#**[http://support.mozilla.com/en-US/kb/Troubleshooting+extensions+and+themes Troubleshooting extensions and themes]
#**[http://support.mozilla.com/en-US/kb/Troubleshooting+plugins Troubleshooting plugins]
#**[http://support.mozilla.com/en-US/kb/Basic+Troubleshooting Basic Troubleshooting]
'''If this reply solves your problem, please click "Solved It" next to this reply when <u>signed-in</u> to the forum.'''
Not related to your question, but...
You may need to update some plug-ins. Check your plug-ins and update as necessary:
*Plug-in check --> http://www.mozilla.org/en-US/plugincheck/
*Adobe Shockwave for Director Netscape plug-in: [https://support.mozilla.com/en-US/kb/Using%20the%20Shockwave%20plugin%20with%20Firefox#w_installing-shockwave Installing ('''''or Updating''''') the Shockwave plugin with Firefox]
*Adobe PDF Plug-In For Firefox and Netscape: [https://support.mozilla.com/en-US/kb/Using%20the%20Adobe%20Reader%20plugin%20with%20Firefox#w_installing-and-updating-adobe-reader Installing/Updating Adobe Reader in Firefox]
*Shockwave Flash (Adobe Flash or Flash): [https://support.mozilla.com/en-US/kb/Managing%20the%20Flash%20plugin#w_updating-flash Updating Flash in Firefox]
*Next Generation Java Plug-in for Mozilla browsers: [https://support.mozilla.com/en-US/kb/Using%20the%20Java%20plugin%20with%20Firefox#w_installing-or-updating-java Installing or Updating Java in Firefox]

Sometimes when I close Firefox and then try to reopen, I get a message that "Firefox is still running" and suggests I close it (which I have already done) or restart my computer, what do I do?

I really have had a problem with Firefox responding sluggishly for the last 6 months or so. I have difficulty opening it, closing it properly, freezing up. I don't have this problem with other programs, so don't know what is going on. Also I can't use my latest version....10 of Adobe Acrobat now. Dont know if that is my computers fault or Firefox. Any help will be appreciated.

See "Hang at exit":
* http://kb.mozillazine.org/Firefox_hangs
* [[Firefox hangs]]

When I close Firefox and then try to reopen it cannot and says Firefox is still running

If I try to reopen Firefox after closing the application, I receive a message that it cannot open because " Firefox is still running"
I am operating with Vista Premium 64bit
My only solution is to restart my computer.

Your above posted system details show outdated plugin(s) with known security and stability risks that you should update.
*Java Plug-in 1.6.0_13 for Netscape Navigator (DLL Helper)
Update the [[Java]] plugin to the latest version.
*http://java.sun.com/javase/downloads/index.jsp (Java Platform: Download JRE)

I close Firefox and then try to shut down my computer, but Windows says that Firefox is still running. It does not show up as running in Task Manager. I have uninstalled and reinstalled several times with same result.

I have also had problems starting Firefox. I click the icon and nothing happens. That problem is intermittent. The Windows message that Firefox is still running after I have closed the Firefox browser keeps occurring and I do not know how to remedy this.

The one thing that is locking up fire fox is the plug ins. You have to check to see if a plug in is locking up firefox first of all.
To see the processes press : CTRL+ALT+DEL. then click the tab marked "Processes" Then look for Fire Fox and click on it. Click the Yes button when the warning box show up.
Then do the say for "Plug-in Container" I believe that is called.
this is because all ads are now flash ads or video ads. They lock my computer up all the time.
When the CTRL+ALT+DEL are pressed. Keep this minimized and you can see if your computer is running at 100% memory near the clock. If the box is totally green, you are running a lot of programs on your system. Check the processes and find out what is not needed. Also watch your virtual memory. Rule of thumb is 1.5x total memory.
Then now it would be able to shut down the computer the right way.
Hope this helps you out.

When I close firefox and then try to reopen it later it often says that it cannot open firefox because it is already open and that I must close it before it can open a new window.

When I look at the task manager it is not listed at all. It will work if I restart my computer.

See "Hang at exit":
* http://kb.mozillazine.org/Firefox_hangs
* [[Firefox hangs]]

No matter what fixes I've tried, everytime I close Firefox and then reopen it, it has lost everything I changed or added! It reverts back to the default "welcome to Firefox"! Every fricken time!

I downloaded the 3.6.12 version. I have Windows 7, could that be the problem? I used Firefox exclusively when I had Windows XP and never had this problem!

Does this help [[Preferences are not saved]]

If i close firefox and try to reopen it tells me its alreasdy running and I have to reboot every time??? WHY IS THIS Please

if I close FireFox and then try to open it again I get a message saying its all ready running and i must close current session and start again or reboot and I always have to reboot ?? Most frustating is there a reason for this I can change settings for

Hi Andis.
First of all, this is completely normal behavior, although it's a bit irritating, I know. What happens is that when you close Firefox, despite the window disappearing right there and then, Firefox keeps running for a little bit until the whole closing procedure is completed. This can take a fraction of a second on fast computers, or can take a few seconds on slow computers or when Firefox is storing a large session (if you save your tabs). All you have to do is wait a bit until Firefox closes, and then open it again.
To see if it's still running, you can press CTRL+SHIFT+ESC and then, under the Processes tab, you can see if firefox.exe is still there. If it's taking an unusual amount of time to close (which happens very rarely, and only if the browser freezes on exit), you can force the application to terminate from this application (task manager).
Firefox 4.0 will reduce by 97% the time it takes firefox.exe to close, so this problem will be basically erased for Firefox's next version.
Until then, I can recommend you this extension, which helps you restart your browser more easily and without bothering about closing times:
https://addons.mozilla.org/en-US/firefox/addon/3559/
Hopefully this will help.

Firfox is ceashing when I attepmt to download a file. Everything works until I close Firfox and then attempt to re-open the browser then it crashes. I tried deleting the download file in my profile folder but it didn't work.

Firefox is crashing when I attempt to download a file. Everything works until I close Firefox and then attempt to re-open the browser then it crashes. I tried deleting the download file in my profile folder but it didn't work.

Downgrade to an older nightly that works for a week or so, then test again to see if the bug's still there. In the mean time, report the bug on Bugzilla if it hasn't already been. There's really nothing you can do about bugs in nightlies.
(A similar sort of bug that triggered 60 seconds after opening, every time, was what got me out of using nightlies as my main browser.)

Oom-killer close firefox and then X restarted

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