[Bug 86559] firefox crashes intermittently

[Glyphobet]

Public bug reported:

Binary package hint: firefox

Firefox crashed, and a crash report was generated.  I had not touched
Firefox for an hour or more, it was merely open on another desktop.

Please find the crash report here:

http://www.theory.org/~matt/crash/_usr_lib_firefox_firefox-
bin.1000.crash

I have the firefox-dbg package installed, so hopefully this crash report
contains some useful information.  I am not including the crash report
as an attachment on this bug because all my previous attempts to attach
files to launchpad bugs have failed with server errors.

I have the standard Flash and Java installed via the package manager:

Shockwave Flash 9.0 r31

Java(TM) Plug-in 1.5.0_08-b03

And these extensions:

Adblock 0.5.3.043
Diggler 0.92
Live HTTP Headers 0.13.1
Mouse Gestures 1.5.2
Stop-or-Reload button 0.2.2

I reported a similar bug once before but that bug report was closed:
https://launchpad.net/ubuntu/+source/firefox/+bug/81863
I am only re-reporting this bug in order to provide the more detailed crash report. 

This bug is completely intermittent and I have *no* *idea* how to
duplicate it.  For this reason, I was not able to reproduce it and
produce a backtrace.  Sorry.

** Affects: firefox (Ubuntu)
     Importance: Undecided
         Status: Unconfirmed

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firefox crashes intermittently
https://launchpad.net/bugs/86559