gdb firefox 22 fine start

GNU gdb (GDB) 7.5
Copyright (C) 2012 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 "x86_64-slackware-linux".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/firefox...(no debugging symbols found)...done.
(gdb) run
Starting program: /usr/bin/firefox
warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Traceback (most recent call last):
  File "/usr/share/gdb/auto-load/usr/lib64/libgobject-2.0.so.0.3200.4-gdb.py", line 9, in <module>
    from gobject import register
  File "/usr/share/glib-2.0/gdb/gobject.py", line 3, in <module>
    import gdb.backtrace
ImportError: No module named backtrace
[New Thread 0x7fffeb0ff700 (LWP 2372)]
[New Thread 0x7fffe9dff700 (LWP 2373)]
[New Thread 0x7fffe8de7700 (LWP 2374)]
[New Thread 0x7fffe83e4700 (LWP 2375)]
[New Thread 0x7fffe75ff700 (LWP 2376)]
[New Thread 0x7fffe6dfe700 (LWP 2377)]
[New Thread 0x7fffe5aff700 (LWP 2378)]
[New Thread 0x7fffe479e700 (LWP 2379)]
[New Thread 0x7fffe3bff700 (LWP 2380)]
[Thread 0x7fffe3bff700 (LWP 2380) exited]
[New Thread 0x7fffe3bff700 (LWP 2381)]
[New Thread 0x7fffe25a8700 (LWP 2382)]
[New Thread 0x7fffe19ff700 (LWP 2383)]
[New Thread 0x7fffe0bff700 (LWP 2384)]
[New Thread 0x7fffe01fb700 (LWP 2385)]
[New Thread 0x7fffdf9fa700 (LWP 2386)]
[Thread 0x7fffe3bff700 (LWP 2381) exited]
[New Thread 0x7fffdeeff700 (LWP 2387)]
[New Thread 0x7fffde6fe700 (LWP 2388)]
[New Thread 0x7fffe3bff700 (LWP 2389)]
[New Thread 0x7fffddcff700 (LWP 2390)]
[New Thread 0x7fffdd4fe700 (LWP 2391)]
[Thread 0x7fffe01fb700 (LWP 2385) exited]
[Thread 0x7fffddcff700 (LWP 2390) exited]
[Thread 0x7fffdd4fe700 (LWP 2391) exited]
[New Thread 0x7fffe01fb700 (LWP 2392)]
[New Thread 0x7fffdd4fe700 (LWP 2393)]
[New Thread 0x7fffddcff700 (LWP 2394)]
[Thread 0x7fffe01fb700 (LWP 2392) exited]
[New Thread 0x7fffdbbff700 (LWP 2395)]
[New Thread 0x7fffdb3fe700 (LWP 2396)]
[New Thread 0x7fffdabfd700 (LWP 2397)]
[New Thread 0x7fffda3fc700 (LWP 2398)]
[New Thread 0x7fffd9bfb700 (LWP 2399)]
[Thread 0x7fffdd4fe700 (LWP 2393) exited]
[Thread 0x7fffdbbff700 (LWP 2395) exited]
[Thread 0x7fffddcff700 (LWP 2394) exited]
[Thread 0x7fffde6fe700 (LWP 2388) exited]
[Thread 0x7fffdb3fe700 (LWP 2396) exited]
[Thread 0x7fffdabfd700 (LWP 2397) exited]
[Thread 0x7fffd9bfb700 (LWP 2399) exited]
[New Thread 0x7fffe01fb700 (LWP 2400)]
[Thread 0x7fffe01fb700 (LWP 2400) exited]
[New Thread 0x7fffe01fb700 (LWP 2401)]
[New Thread 0x7fffdd4fe700 (LWP 2402)]
[New Thread 0x7fffddcff700 (LWP 2403)]
[New Thread 0x7fffdbbff700 (LWP 2404)]
[Thread 0x7fffdbbff700 (LWP 2404) exited]
[New Thread 0x7fffdadff700 (LWP 2405)]
[New Thread 0x7fffdbbff700 (LWP 2406)]
[New Thread 0x7fffd90ff700 (LWP 2407)]
[New Thread 0x7fffd88fe700 (LWP 2408)]
[Thread 0x7fffe479e700 (LWP 2379) exited]
[Thread 0x7fffe9dff700 (LWP 2373) exited]
[Thread 0x7fffd90ff700 (LWP 2407) exited]
[Thread 0x7fffdadff700 (LWP 2405) exited]
[Thread 0x7fffdd4fe700 (LWP 2402) exited]
[Thread 0x7fffdf9fa700 (LWP 2386) exited]
[Thread 0x7fffdeeff700 (LWP 2387) exited]
[New Thread 0x7fffdeeff700 (LWP 2409)]
[Thread 0x7fffd88fe700 (LWP 2408) exited]
[Thread 0x7fffdeeff700 (LWP 2409) exited]
[Thread 0x7fffddcff700 (LWP 2403) exited]
[Thread 0x7fffe19ff700 (LWP 2383) exited]
[Thread 0x7fffdbbff700 (LWP 2406) exited]
[New Thread 0x7fffe19ff700 (LWP 2410)]
[Thread 0x7fffe19ff700 (LWP 2410) exited]
[Thread 0x7fffda3fc700 (LWP 2398) exited]
[Thread 0x7fffe0bff700 (LWP 2384) exited]
[Thread 0x7fffe25a8700 (LWP 2382) exited]
[Thread 0x7fffe3bff700 (LWP 2389) exited]
[Thread 0x7fffe5aff700 (LWP 2378) exited]
[Thread 0x7fffe01fb700 (LWP 2401) exited]
[Thread 0x7fffeb0ff700 (LWP 2372) exited]
[Thread 0x7fffe8de7700 (LWP 2374) exited]
[Thread 0x7fffe6dfe700 (LWP 2377) exited]
[Thread 0x7fffe75ff700 (LWP 2376) exited]
[Thread 0x7ffff7fbd740 (LWP 2360) exited]
[Inferior 1 (process 2360) exited normally]
(gdb) quit