I 'll have to let someone else figure that out #Crash ID report [https://crash-stats.mozilla.com/report/index/3979732f-1805-4f72-afa3-f22402111116 3979732f-1805-4f72-afa3-f22402111116] #Crash Signature [https://crash-stats.mozilla.com/report/list?product=Firefox&query_search=signature&query_type=exact&query=nsHostResolver%3A%3AOnLookupComplete%28nsHostRecord*%2C%20unsigned%20int%2C%20PRAddrInfo*%29&reason_type=contains&date=11%2F16%2F2011%2003%3A14%3A39&range_value=1&range_unit=weeks&hang_type=any&process_type=any&do_query=1&signature=nsHostResolver%3A%3AOnLookupComplete%28nsHostRecord*%2C%20unsigned%20int%2C%20PRAddrInfo*%29 nsHostResolver::OnLookupComplete(nsHostRecord*, unsigned int, PRAddrInfo*)] Or you could use the report it link you will find within the first linked report, and file a bug report yourself. Before you do that have you * used Trusteer Rapport ? * Roboform ? * or done a Windows System restore within the last few days ? Any of the above could be implicated as reasons for some users recent crashes. Presumably you have already seen [[firefox crashes]]