It is a residual crash signature that exists in trunk builds. It is #131 top crasher in 4.0b8pre for the last week. There are various crash reasons: * EXCEPTION_ACCESS_VIOLATION_EXEC: 0 @0x6a7420 1 xul.dll nsFactoryEntry::GetFactory xpcom/components/nsComponentManager.cpp:1941 2 xul.dll nsComponentManagerImpl::CreateInstanceByContractID xpcom/components/nsComponentManager.cpp:1299 3 xul.dll nsComponentManagerImpl::GetServiceByContractID xpcom/components/nsComponentManager.cpp:1664 4 xul.dll nsGetServiceByContractIDWithError::operator obj-firefox/xpcom/build/nsComponentManagerUtils.cpp:288 5 xul.dll nsAppStartupNotifier::Observe embedding/components/appstartup/src/nsAppStartupNotifier.cpp:100 6 xul.dll XRE_main toolkit/xre/nsAppRunner.cpp:3517 7 firefox.exe wmain toolkit/xre/nsWindowsWMain.cpp:125 8 firefox.exe __tmainCRTStartup obj-firefox/memory/jemalloc/crtsrc/crtexe.c:591 9 kernel32.dll BaseThreadInitThunk 10 ntdll.dll __RtlUserThreadStart 11 ntdll.dll _RtlUserThreadStart * EXCEPTION_ACCESS_VIOLATION_READ: 0 xul.dll nsFactoryEntry::GetFactory xpcom/components/nsComponentManager.cpp:1939 1 xul.dll nsComponentManagerImpl::CreateInstance xpcom/components/nsComponentManager.cpp:1213 2 xul.dll nsComponentManagerImpl::GetService xpcom/components/nsComponentManager.cpp:1468 3 xul.dll nsJSCID::GetService js/src/xpconnect/src/xpcjsid.cpp:840 4 xul.dll NS_InvokeByIndex_P xpcom/reflect/xptcall/src/md/win32/xptcinvoke.cpp:102 5 xul.dll XPC_WN_CallMethod js/src/xpconnect/src/xpcwrappednativejsops.cpp:1589 6 mozjs.dll js::Interpret js/src/jsinterp.cpp:4744 7 mozjs.dll js::RunScript js/src/jsinterp.cpp:665 8 mozjs.dll js::Invoke js/src/jsinterp.cpp:768 9 mozjs.dll js_fun_apply js/src/jsfun.cpp:2341 10 mozjs.dll js::Interpret js/src/jsinterp.cpp:4744 11 mozjs.dll js::RunScript js/src/jsinterp.cpp:665 12 mozjs.dll js::Invoke js/src/jsinterp.cpp:768 13 mozjs.dll js::ExternalInvoke js/src/jsinterp.cpp:881 14 mozjs.dll JS_CallFunctionValue js/src/jsapi.cpp:4908 15 xul.dll nsXPCWrappedJSClass::CallMethod js/src/xpconnect/src/xpcwrappedjsclass.cpp:1694 16 xul.dll nsXPCWrappedJS::CallMethod js/src/xpconnect/src/xpcwrappedjs.cpp:577 17 xul.dll PrepareAndDispatch xpcom/reflect/xptcall/src/md/win32/xptcstubs.cpp:114 18 xul.dll SharedStub xpcom/reflect/xptcall/src/md/win32/xptcstubs.cpp:141 19 xul.dll nsEventListenerManager::HandleEventSubType content/events/src/nsEventListenerManager.cpp:1112 * EXCEPTION_ACCESS_VIOLATION_WRITE: 0 @0x818ac9 1 xul.dll nsFactoryEntry::GetFactory xpcom/components/nsComponentManager.cpp:1941 2 AudioService_ff4.dll AudioService_ff4.dll@0xd94e3 3 xul.dll nsComponentManagerImpl::CreateInstance xpcom/components/nsComponentManager.cpp:1213 4 xul.dll nsComponentManagerImpl::GetService xpcom/components/nsComponentManager.cpp:1468 5 xul.dll nsJSCID::GetService js/src/xpconnect/src/xpcjsid.cpp:840 6 xul.dll NS_InvokeByIndex_P xpcom/reflect/xptcall/src/md/win32/xptcinvoke.cpp:102 7 xul.dll XPC_WN_CallMethod js/src/xpconnect/src/xpcwrappednativejsops.cpp:1589 8 mozjs.dll js::Interpret js/src/jsinterp.cpp:4744 9 mozjs.dll js::RunScript js/src/jsinterp.cpp:665 10 mozjs.dll js::Invoke js/src/jsinterp.cpp:768 11 mozjs.dll js_fun_apply js/src/jsfun.cpp:2341 12 mozjs.dll js::Interpret js/src/jsinterp.cpp:4744 13 mozjs.dll js::RunScript js/src/jsinterp.cpp:665 14 mozjs.dll js::Invoke js/src/jsinterp.cpp:768 15 mozjs.dll js::ExternalInvoke js/src/jsinterp.cpp:881 16 mozjs.dll JS_CallFunctionValue js/src/jsapi.cpp:4898 17 xul.dll nsXPCWrappedJSClass::CallMethod js/src/xpconnect/src/xpcwrappedjsclass.cpp:1694 18 xul.dll nsXPCWrappedJS::CallMethod js/src/xpconnect/src/xpcwrappedjs.cpp:577 19 xul.dll PrepareAndDispatch xpcom/reflect/xptcall/src/md/win32/xptcstubs.cpp:114 20 xul.dll SharedStub xpcom/reflect/xptcall/src/md/win32/xptcstubs.cpp:141 21 xul.dll nsEventListenerManager::HandleEventSubType content/events/src/nsEventListenerManager.cpp:1112 More reports at: http://crash-stats.mozilla.com/report/list?product=Firefox&query_search=signature&query_type=exact&query=&range_value=4&range_unit=weeks&hang_type=any&process_type=any&plugin_field=&plugin_query_type=&plugin_query=&do_query=1&admin=&signature=nsFactoryEntry%3A%3AGetFactory%28%29

Does this correlate with particular extensions?

> Does this correlate with particular extensions? Definitively with AudioService_ff4.dll in 4.0b7. Can it be related to bug 612088?

Yeah, let's just dupe it, and we'll either need to figure out/fix the AudioService thing, or blacklist it.