Comment 44 for bug 236853

(In reply to comment #39)
> We if it helps, for me it often happens when restarting after installing
> extensions.

Are you 100% sure it is this crash? If so, are you able to attach a debugger to FF? Best, _before_ it crash?

...

Actually, what would be very useful is a JS stack - the source of call. It could be one of these, but not limited to:

http://mxr.mozilla.org/mozilla-central/source/toolkit/mozapps/update/src/nsUpdateService.js.in#2506

http://mxr.mozilla.org/mozilla-central/source/toolkit/mozapps/plugins/content/pluginInstallerService.js#165

http://mxr.mozilla.org/mozilla-central/source/toolkit/components/url-classifier/content/multi-querier.js#133
http://mxr.mozilla.org/mozilla-central/source/toolkit/components/url-classifier/content/multi-querier.js#142

Personally I most suspect the url classifier.