[feisty] Firefox Crashed [@ signal_emit_unlocked_R]

Thank you Euan for taking the time to fill up this report.

If this crash is reproducible, can you write a step to step instruction so we can reproduce it here.

Also, which extensions/plugins do you have enabled?

Thank you in advance.

Taking report to retrace.

Retrace done:
...
#3 <signal handler called>
#4 0xb75db766 in signal_emit_unlocked_R (node=0xb77f1360, detail=155713352,
    instance=0x947fec0, emission_return=0x4, instance_and_params=0x20)
    at gsignal.c:2285
 tmp = <value optimized out>
 handler = (Handler *) 0x0
 accumulator = (SignalAccumulator *) 0x179
 emission = {next = 0x3e8, instance = 0x0, ihint = {signal_id = 25,
    detail = 1, run_type = 3082742032}, state = 155713416, chain_type = 0}
 class_closure = (GClosure *) 0x24833bb
 handler_list = (Handler *) 0x0
 return_accu = (GValue *) 0x0
 accu = {g_type = 0, data = {{v_int = 49, v_uint = 49, v_long = 49,
      v_ulong = 49, v_int64 = 49, v_uint64 = 49, v_float = 6.86636248e-44,
      v_double = 2.4209216646221081e-322, v_pointer = 0x31}, {v_int = 133,
      v_uint = 133, v_long = 133, v_ulong = 133, v_int64 = 575525617797,
...

Seems that you have some third party extensions (e.g. /opt/RealPlayer/mozilla/nphelix.so) that may have some relationship with the crash. Try to disable it or use the package that provides that extension from ubuntu (mozilla-helix-player).

Retraced Thread Stacktrace

I can't think of any way to reproduce the bug, it appears to occur randomly.

No extensions are installed.

I have removed the RealPlayer and Flash plugins. I have installed the mozilla-helix-player package instead.

Will let you know if this solves the problem.

StacktraceTop:__kernel_vsyscall ()
raise () from /lib/tls/i686/cmov/libpthread.so.0
nsProfileLock::FatalSignalHandler (signo=11) at nsProfileLock.cpp:206

signal_emit_unlocked_R (node=0xb77f1360, detail=155713352, instance=0x947fec0, emission_return=0x4, instance_and_params=0x20) at gsignal.c:2285

No more crashes since removing unsupported plugins. Sorry I should have known this to begin with.

Closing this report as seems to be fixed for Euan.