(gdb) run
Starting program: /usr/lib/mozilla-firefox/firefox-bin 
(no debugging symbols found)
Failed to read a valid object file image from memory.
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread -1221687632 (LWP 11937)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1221687632 (LWP 11937)]
0xb7e6f745 in ?? () from /usr/lib/mozilla-firefox/libxpcom_core.so