$ LD_LIBRARY_PATH=/usr/lib/mozilla-firefox gdb /usr/lib/mozilla-firefox/firefox 
GNU gdb 6.8
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "powerpc-unknown-linux-gnu"...
(no debugging symbols found)
(gdb) r
Starting program: /usr/lib/mozilla-firefox/firefox 
[Thread debugging using libthread_db enabled]
[New Thread 0x4801fcd0 (LWP 28071)]
[New Thread 0x48a2f4b0 (LWP 28085)]
[New Thread 0x4922f4b0 (LWP 28086)]
[New Thread 0x49b144b0 (LWP 28087)]
[Thread 0x49b144b0 (LWP 28087) exited]
[New Thread 0x4a3144b0 (LWP 28088)]
[Thread 0x4a3144b0 (LWP 28088) exited]
[New Thread 0x4a3144b0 (LWP 28089)]
[New Thread 0x49b144b0 (LWP 28090)]
[Thread 0x49b144b0 (LWP 28090) exited]
[New Thread 0x49b144b0 (LWP 28091)]
[New Thread 0x4ab144b0 (LWP 28092)]
[New Thread 0x4b3144b0 (LWP 28093)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x4801fcd0 (LWP 28071)]
0x0ce79cfc in nsDocShell::InternalLoad (this=0x104449f0, aURI=0x10444e28, 
    aReferrer=0x0, aOwner=0x1015f588, aFlags=8, aWindowTarget=0x104f73b8, 
    aTypeHint=0x0, aPostData=0x0, aHeadersData=0x0, aLoadType=1, aSHEntry=0x0, 
    aFirstParty=1, aDocShell=0x0, aRequest=0x0) at nsDocShell.cpp:7211
7211	nsDocShell.cpp: No such file or directory.
	in nsDocShell.cpp
Current language:  auto; currently c++
(gdb) bt
#0  0x0ce79cfc in nsDocShell::InternalLoad (this=0x104449f0, aURI=0x10444e28, 
    aReferrer=0x0, aOwner=0x1015f588, aFlags=8, aWindowTarget=0x104f73b8, 
    aTypeHint=0x0, aPostData=0x0, aHeadersData=0x0, aLoadType=1, aSHEntry=0x0, 
    aFirstParty=1, aDocShell=0x0, aRequest=0x0) at nsDocShell.cpp:7211
#1  0x0ce732f4 in nsDocShell::LoadURI (this=0x104449f0, aURI=0x10444e28, 
    aLoadInfo=<value optimized out>, aLoadFlags=16384, aFirstParty=1)
    at nsDocShell.cpp:904
#2  0x0d913598 in nsWindowWatcher::OpenWindowJSInternal (this=0x10145798, 
    aParent=0x0, aUrl=<value optimized out>, aName=<value optimized out>, 
    aFeatures=0xbfae4ba8 "", aDialog=1, argv=0x104992f8, aCalledFromJS=0, 
    _retval=0xbfae5020) at nsWindowWatcher.cpp:909
#3  0x0d9142a8 in nsWindowWatcher::OpenWindow (this=0x10145798, aParent=0x0, 
    aUrl=0x104d0e28 "chrome://browser/content/", aName=0x104992d0 "_blank", 
    aFeatures=0x10442fc0 "chrome,dialog=no,all", aArguments=0x10171338, 
    _retval=0xbfae5020) at nsWindowWatcher.cpp:419
#4  0x0fb9b84c in NS_InvokeByIndex_P ()
   from /usr/lib/xulrunner-1.9/libxpcom_core.so
#5  0x0dbf29c0 in XPCWrappedNative::CallMethod (ccx=@0xbfae51b0, 
    mode=XPCWrappedNative::CALL_METHOD) at xpcwrappednative.cpp:2393
#6  0x0dbfccec in XPC_WN_CallMethod (cx=0x10145b38, obj=<value optimized out>, 
    argc=<value optimized out>, argv=<value optimized out>, 
    vp=<value optimized out>) at xpcwrappednativejsops.cpp:1473
#7  0x0ea98f20 in js_Invoke (cx=0x10145b38, argc=5, vp=0x101a13e0, flags=2)
    at jsinterp.c:1297
#8  0x0ea8c324 in js_Interpret (cx=0x10145b38) at jsinterp.c:4852
#9  0x0ea991e8 in js_Invoke (cx=0x10145b38, argc=1, vp=0x101a1318, flags=0)
    at jsinterp.c:1313
#10 0x0dbf0844 in nsXPCWrappedJSClass::CallMethod (this=0x103f25a0, 
    wrapper=<value optimized out>, methodIndex=3, info=0x101f33a8, 
    nativeParams=0xbfae57a8) at xpcwrappedjsclass.cpp:1523
#11 0x0dbe963c in nsXPCWrappedJS::CallMethod (this=<value optimized out>, 
    methodIndex=<value optimized out>, info=<value optimized out>, 
    params=<value optimized out>) at xpcwrappedjs.cpp:559
#12 0x0fb9b5d0 in PrepareAndDispatch (self=0x10422938, 
    methodIndex=<value optimized out>, args=<value optimized out>, 
    gprData=0xbfae5868, fprData=0xbfae5888) at xptcstubs_ppc_linux.cpp:173
#13 0x0fb9b8c4 in SharedStub () from /usr/lib/xulrunner-1.9/libxpcom_core.so
#14 0x0cf3abec in EnumRun (aHandler=0x10521e88, aThis=0x572)
    at nsCommandLine.cpp:667
#15 0x0cf3c10c in nsCommandLine::EnumerateHandlers (this=0x101c5898, 
    aCallback=0xcf3abd0 <EnumRun>, aClosure=<value optimized out>)
    at nsCommandLine.cpp:605
#16 0x0cf3c1f8 in nsCommandLine::Run (this=0x101c5898) at nsCommandLine.cpp:679
#17 0x0eb6c7d8 in XRE_main (argc=<value optimized out>, 
    argv=<value optimized out>, aAppData=<value optimized out>)
    at nsAppRunner.cpp:3153
#18 0x10001174 in ?? ()
#19 0x0fc0bb44 in generic_start_main (main=0x10000e7c, argc=1, 
    ubp_av=0xbfae6ec4, auxvec=0xbfae6fb0, init=0xbfae5e74, 
    fini=<value optimized out>, rtld_fini=<value optimized out>, 
    stack_end=<value optimized out>) at ../csu/libc-start.c:226
#20 0x0fc0bce4 in __libc_start_main (argc=<value optimized out>, 
    ubp_av=<value optimized out>, ubp_ev=<value optimized out>, 
    auxvec=<value optimized out>, rtld_fini=<value optimized out>, 
    stinfo=<value optimized out>, stack_on_entry=<value optimized out>)
    at ../sysdeps/unix/sysv/linux/powerpc/libc-start.c:92
#21 0x00000000 in ?? ()
(gdb)