Crash url:- https://crash-stats.mozilla.com/report/index/bp-c842187f-6cd0-43d4-a036-4f7b82120223 <br> Firefox 10.0.2 Crash Report [@ mozalloc_abort | mozalloc_handle_oom | moz_xrealloc | nsTArray_base<nsTArrayDefaultAllocator>::EnsureCapacity | nsUrlClassifierStore::ReadPrefixes ] <br> related bug:- https://bugzilla.mozilla.org/show_bug.cgi?id=702217 as per [https://bugzilla.mozilla.org/show_bug.cgi?id=702217 bug 702217] this crash has been fixed on Firefox 12 which is currently aurora channel, you can test it here * www.mozilla.org/en-US/firefox/aurora/