[Bug 574617] [NEW] Firefox 3.6.3 Freezes After Clicking Any Menu or Bookmarks Toolbar Item in Ubuntu Lucid Lynx 10.04

[Oh01]

Public bug reported:

Binary package hint: firefox

I've just upgraded from Ubuntu 8.04 Hardy Heron to Lucid Lynx 10.04
(both LTS releases). Firefox now freezes as soon as I click on a menu
item like File, Edit, etc. or on an item in the Bookmarks Toolbar.  The
same goes for right-clicking on a Bookmarks Toolbar item or even on a
misspelled word in a text box. After a While, System Monitor shows a
spike of CPU activity for Firefox, and Firefox becomes unfrozen. (Or is
it that just switching to System Monitor and switching back to Firefox
that does it?). But trying the menus and Bookmarks Toolbar would freeze
it again.

I can still use Firefox to go to a URL by typing it in the address bar,
or by linking from one page to another (it even opens from another
program like ubuntu-bug). But the functionality is severely degraded
when the items listed above are broken.

I've reinstalled both Firefox and xulrunner. I also used Firefox Safe
Mode (Terminal > firefox --safe-mode) and uninstalled flash-plugin using
System > Administration > Synaptic Package manager (based on some things
I'd read in forums and bug reports). But the problem remains.

Note: this may be related to Bug #401823 because if I launch Firefox from a terminal with firefox --safe-mode
I get the same error output as in that bug. I think that my situation is different (worse!) because that bug does not say Firefox freezes, only that there is annoying error output. But my Firefox actually freezes. 

Other browsers (Konqueror, Epiphany) work without problems, but I'd like
to get Firefox back, please!

Thanks in advance for your help.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: firefox 3.6.3+nobinonly-0ubuntu4
ProcVersionSignature: Ubuntu 2.6.32-22.33-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic i686
Architecture: i386
Date: Mon May  3 12:32:41 2010
FirefoxPackages:
 firefox 3.6.3+nobinonly-0ubuntu4
 firefox-gnome-support N/A
 firefox-branding 3.6.3+nobinonly-0ubuntu4
 abroswer N/A
 abrowser-branding N/A
ProcEnviron:
 LANGUAGE=en_CA:en
 PATH=(custom, no user)
 LANG=en_CA.utf8
 SHELL=/bin/bash
SourcePackage: firefox

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


** Tags: apport-bug firefox i386 lucid

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Firefox 3.6.3 Freezes After Clicking Any Menu or Bookmarks Toolbar Item in Ubuntu Lucid Lynx 10.04
https://bugs.launchpad.net/bugs/574617
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