.
Thread 7 (process 1535):
#0  0x00002b4db5ffe987 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#1  0x00002b4db5ddc348 in ?? () from /usr/lib/libnspr4.so
#2  0x00002b4db5ddcf6a in PR_WaitCondVar () from /usr/lib/libnspr4.so
#3  0x00002b4db5954552 in ?? () from /usr/lib/firefox/libxpcom_core.so
#4  0x00002b4db595268c in ?? () from /usr/lib/firefox/libxpcom_core.so
#5  0x00002b4db5de25ad in ?? () from /usr/lib/libnspr4.so
#6  0x00002b4db5ffa2a5 in start_thread () from /lib/libpthread.so.0
#7  0x00002b4db711f5dd in clone () from /lib/libc.so.6
#8  0x0000000000000000 in ?? ()
.
Thread 6 (process 1538):
#0  0x00002b4db5ffe987 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#1  0x00002b4db5ddc348 in ?? () from /usr/lib/libnspr4.so
#2  0x00002b4db5ddcf6a in PR_WaitCondVar () from /usr/lib/libnspr4.so
#3  0x00002b4dbc7ec2f8 in ?? () from /usr/lib/firefox/components/libnecko.so
#4  0x00002b4db5de25ad in ?? () from /usr/lib/libnspr4.so
#5  0x00002b4db5ffa2a5 in start_thread () from /lib/libpthread.so.0
#6  0x00002b4db711f5dd in clone () from /lib/libc.so.6
#7  0x0000000000000000 in ?? ()
.
Thread 5 (process 1539):
#0  0x00002b4db5ffe987 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#1  0x00002b4db5ddc348 in ?? () from /usr/lib/libnspr4.so
#2  0x00002b4db5ddcf6a in PR_WaitCondVar () from /usr/lib/libnspr4.so
#3  0x00002b4dbc7ec2f8 in ?? () from /usr/lib/firefox/components/libnecko.so
#4  0x00002b4db5de25ad in ?? () from /usr/lib/libnspr4.so
#5  0x00002b4db5ffa2a5 in start_thread () from /lib/libpthread.so.0
#6  0x00002b4db711f5dd in clone () from /lib/libc.so.6
#7  0x0000000000000000 in ?? ()
.
Thread 4 (process 1540):
#0  0x00002b4db5ffe987 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#1  0x00002b4db5ddc348 in ?? () from /usr/lib/libnspr4.so
#2  0x00002b4db5ddcf6a in PR_WaitCondVar () from /usr/lib/libnspr4.so
#3  0x00002b4dbc7ec2f8 in ?? () from /usr/lib/firefox/components/libnecko.so
#4  0x00002b4db5de25ad in ?? () from /usr/lib/libnspr4.so
#5  0x00002b4db5ffa2a5 in start_thread () from /lib/libpthread.so.0
#6  0x00002b4db711f5dd in clone () from /lib/libc.so.6
#7  0x0000000000000000 in ?? ()
.
Thread 3 (process 1541):
#0  0x00002b4db5ffe987 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#1  0x00002b4db5ddc348 in ?? () from /usr/lib/libnspr4.so
#2  0x00002b4db5ddcf6a in PR_WaitCondVar () from /usr/lib/libnspr4.so
#3  0x00002b4dbc7ec2f8 in ?? () from /usr/lib/firefox/components/libnecko.so
#4  0x00002b4db5de25ad in ?? () from /usr/lib/libnspr4.so
#5  0x00002b4db5ffa2a5 in start_thread () from /lib/libpthread.so.0
#6  0x00002b4db711f5dd in clone () from /lib/libc.so.6
#7  0x0000000000000000 in ?? ()
.
Thread 2 (process 1551):
#0  0x00002b4db5ffe796 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#1  0x00002b4db5ddcffc in PR_WaitCondVar () from /usr/lib/libnspr4.so
#2  0x00002b4db5ddd066 in PR_Wait () from /usr/lib/libnspr4.so
#3  0x00002b4db594efad in PL_WaitForEvent ()
   from /usr/lib/firefox/libxpcom_core.so
#4  0x00002b4db59504cf in ?? () from /usr/lib/firefox/libxpcom_core.so
#5  0x00002aaaabc78802 in ?? ()
   from /usr/lib/firefox/components/libtoolkitcomps.so
#6  0x00002b4db5de25ad in ?? () from /usr/lib/libnspr4.so
#7  0x00002b4db5ffa2a5 in start_thread () from /lib/libpthread.so.0
#8  0x00002b4db711f5dd in clone () from /lib/libc.so.6
#9  0x0000000000000000 in ?? ()
.
Thread 1 (process 1532):
#0  0x00002b4db60020a0 in raise () from /lib/libpthread.so.0
#1  0x000000000040f9f6 in ?? ()
#2  <signal handler called>
#3  0x00002aaaaaf3f715 in ?? ()
   from /usr/lib/firefox/components/libwidget_gtk2.so
#4  0x00002aaaaaf3ff4c in ?? ()
   from /usr/lib/firefox/components/libwidget_gtk2.so
#5  0x00002aaaaaf4002b in ?? ()
   from /usr/lib/firefox/components/libwidget_gtk2.so
#6  0x00002aaaaaf4517a in ?? ()
   from /usr/lib/firefox/components/libwidget_gtk2.so
#7  0x00002aaaadb75299 in ?? ()
   from /usr/lib/firefox/components/libgklayout.so
#8  0x00002aaaad8ee510 in ?? ()
   from /usr/lib/firefox/components/libgklayout.so
#9  0x00002aaaad8ea1ea in ?? ()
   from /usr/lib/firefox/components/libgklayout.so
#10 0x00002aaaad8bc832 in ?? ()
   from /usr/lib/firefox/components/libgklayout.so
#11 0x00002aaaad8cc0d2 in ?? ()
   from /usr/lib/firefox/components/libgklayout.so
#12 0x00002aaaad8bab22 in ?? ()
   from /usr/lib/firefox/components/libgklayout.so
#13 0x00002aaaac5664f2 in ?? ()
   from /usr/lib/firefox/components/libdocshell.so
#14 0x00002aaaac56683f in ?? ()
   from /usr/lib/firefox/components/libdocshell.so
#15 0x00002aaaaaadf3fb in ?? ()
   from /usr/lib/firefox/components/libxpconnect.so
#16 0x00002aaaadb82423 in ?? ()
   from /usr/lib/firefox/components/libgklayout.so
#17 0x00002b4db544b754 in ?? () from /usr/lib/firefox/libmozjs.so
#18 0x00002b4db5422e9a in JS_GC () from /usr/lib/firefox/libmozjs.so
#19 0x00000000004097bb in ?? ()
#20 0x00000000004040d9 in ?? ()
#21 0x0000000000407577 in ?? ()
#22 0x00002b4db706d8e4 in __libc_start_main () from /lib/libc.so.6
#23 0x0000000000403889 in ?? ()
#24 0x00007ffff58c02d8 in ?? ()
#25 0x0000000000000000 in ?? ()