Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Firefox is freezing now and again, and I want to know why.

I thought I could get some debug output by starting Firefox with the -g option, but it just comes to some kind of prompt and then stops.

How do I get debug output so I can hopefully diagnose Firefox's problems?

Here is what I currently get:

$ firefox -g
GNU gdb (Ubuntu/Linaro 7.3-0ubuntu2) 7.3-2011.08
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <>
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 "i686-linux-gnu".
For bug reporting instructions, please see:
Reading symbols from /usr/lib/firefox-7.0.1/firefox...(no debugging symbols found)...done.

Once it reaches (gdb), it stops, and firefox never starts.

share|improve this question
up vote 5 down vote accepted

You should type run at gdb prompt, so that firefox continue running, and see any message leaved when it crashes.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.