This was written in the console windows. there warnings and Assertion failure: (Can't own error reporting off-main-thread yet) which points that error occured before. But where to look it?
[3740] WARNING: XPCOM objects created/destroyed from static ctor/dtor: file g:/temp/pal/xpcom/base/nsTraceRefcnt.cpp, line 120
[3740] WARNING: preserving unexpected JS escape sequence: file g:\temp\pal\modules\libpref\prefread.cpp, line 393
[3740] WARNING: NS_ENSURE_SUCCESS(rv, rv) failed with result 0x80004005: file g:/temp/pal/xpcom/base/nsSystemInfo.cpp, line 69
JavaScript strict warning: file:///G:/Temp/tycho.error/dist/bin/browser/components/nsBrowserGlue.js, line 1260: SyntaxError: in strict mode code, functions maybe declared only at top level or immediately within another function
[3740] WARNING: This method is lossy. Use GetCanonicalPath !: file g:/temp/pal/xpcom/io/nsLocalFileWin.cpp, line 3483
++DOCSHELL 04E60000 == 1 [pid = 3740] [id = 1]
++DOMWINDOW == 1 (04E60400) [pid = 3740] [serial = 1] [outer = 00000000]
++DOMWINDOW == 2 (04804C00) [pid = 3740] [serial = 2] [outer = 04E60400]
[3740] WARNING: getting z level of unregistered window: file g:\temp\pal\xpfe\appshell\nsWindowMediator.cpp, line 591
[3740] WARNING: getting z level of unregistered window: file g:\temp\pal\xpfe\appshell\nsWindowMediator.cpp, line 591
[3740] WARNING: getting z level of unregistered window: file g:\temp\pal\xpfe\appshell\nsWindowMediator.cpp, line 591
[3740] WARNING: getting z level of unregistered window: file g:\temp\pal\xpfe\appshell\nsWindowMediator.cpp, line 591
++DOCSHELL 05EF2800 == 2 [pid = 3740] [id = 2]
++DOMWINDOW == 3 (05EF2C00) [pid = 3740] [serial = 3] [outer = 00000000]
++DOMWINDOW == 4 (061D5C00) [pid = 3740] [serial = 4] [outer = 05EF2C00]
++DOMWINDOW == 5 (061D9400) [pid = 3740] [serial = 5] [outer = 04E60400]
Assertion failure: NS_IsMainThread() (Can't own error reporting off-main-thread yet), at g:\temp\pal\dom\base\ScriptSettings.cpp:475
JavaScript strict warning: chrome://browser/content/nsContextMenu.js, line 2: TypeError: setting a property that has only a getter
++DOCSHELL 064B7800 == 3 [pid = 3740] [id = 3]
++DOMWINDOW == 6 (064B7C00) [pid = 3740] [serial = 6] [outer = 00000000]
JavaScript strict warning: chrome://browser/content/utilityOverlay.js, line 3: TypeError: setting a property that has only a getter
JavaScript strict warning: chrome://browser/content/utilityOverlay.js, line 5: TypeError: setting a property that has only a getter
JavaScript strict warning: chrome://browser/content/utilityOverlay.js, line 3: TypeError: setting a property that has only a getter
JavaScript strict warning: chrome://browser/content/utilityOverlay.js, line 5: TypeError: setting a property that has only a getter
JavaScript strict warning: chrome://browser/content/places/placesOverlay.xul, line 27: TypeError: setting a property that has only a getter
JavaScript strict warning: chrome://browser/content/autorecovery.js, line 18: TypeError: setting a property that has only a getter
#01: NS_LogCOMPtrAddRef[xul +0xbcbc70]
#02: NS_LogCOMPtrAddRef[xul +0xbd6eab]
#03: NS_LogCOMPtrAddRef[xul +0xbd6d42]
#04: NS_LogCOMPtrAddRef[xul +0xbd696d]
#05: NS_LogCOMPtrAddRef[xul +0xbd6a20]
#06: NS_LogCOMPtrAddRef[xul +0xbd6fbe]
#07: NS_LogCOMPtrAddRef[xul +0xbd25f8]
#08: NS_LogCOMPtrAddRef[xul +0xbd2791]
#09: imgLoader::SupportImageWithMimeType[xul +0x72cdff]
#10: mozilla::LoadInfo::TriggeringPrincipal[xul +0xecb1cc]
#11: mozilla::LoadInfo::TriggeringPrincipal[xul +0xee59be]
#12: mozilla::LoadInfo::TriggeringPrincipal[xul +0xede194]
#13: XRE_AddStaticComponent[xul +0x85890]
#14: NS_InitXPCOM[xul +0xa0ef5]
#15: mozilla::LoadInfo::TriggeringPrincipal[xul +0xeccd67]
#16: mozilla::LoadInfo::TriggeringPrincipal[xul +0xebabe3]
#17: XRE_AddStaticComponent[xul +0x85890]
#18: NS_InitXPCOM[xul +0xa0ef5]
#19: mozilla::LoadInfo::Release[xul +0x230e44]
#20: mozilla::LoadInfo::Release[xul +0x21b959]
#21: mozilla::LoadInfo::Release[xul +0x21b911]
#22: mozilla::LoadInfo::Release[xul +0x21b744]
#23: XRE_AddStaticComponent[xul +0x88aa3]
#24: PR_NativeCreateThread[nss3 +0x214ea8]
#25: PR_SetSysfdTableSize[nss3 +0x20681f]
#26: _get_flsindex[MSVCR120 +0x2c01d]
#27: _get_flsindex[MSVCR120 +0x2c001]
#28: BaseThreadInitThunk[KERNEL32 +0x17c04]
#29: RtlInitializeExceptionChain[ntdll +0x5ab8f]
#30: RtlInitializeExceptionChain[ntdll +0x5ab5a]
[3740] WARNING: NS_ENSURE_SUCCESS(rv, rv) failed with result 0x80040111: file g:\temp\pal\dom\base\nsFrameLoader.cpp, line 288
++DOCSHELL 0B32F000 == 4 [pid = 3740] [id = 4]
++DOMWINDOW == 7 (06A29010) [pid = 3740] [serial = 7] [outer = 00000000]
++DOMWINDOW == 8 (06A293F0) [pid = 3740] [serial = 8] [outer = 06A29010]
[3740] WARNING: preserving unexpected JS escape sequence: file g:\temp\pal\modules\libpref\prefread.cpp, line 393
[3740] WARNING: NS_ENSURE_SUCCESS(rv, rv) failed with result 0x80004005: file g:/temp/pal/xpcom/base/nsSystemInfo.cpp, line 69
JavaScript strict warning: file:///G:/Temp/tycho.error/dist/bin/browser/components/nsBrowserGlue.js, line 1260: SyntaxError: in strict mode code, functions maybe declared only at top level or immediately within another function
[3740] WARNING: This method is lossy. Use GetCanonicalPath !: file g:/temp/pal/xpcom/io/nsLocalFileWin.cpp, line 3483
++DOCSHELL 04E60000 == 1 [pid = 3740] [id = 1]
++DOMWINDOW == 1 (04E60400) [pid = 3740] [serial = 1] [outer = 00000000]
++DOMWINDOW == 2 (04804C00) [pid = 3740] [serial = 2] [outer = 04E60400]
[3740] WARNING: getting z level of unregistered window: file g:\temp\pal\xpfe\appshell\nsWindowMediator.cpp, line 591
[3740] WARNING: getting z level of unregistered window: file g:\temp\pal\xpfe\appshell\nsWindowMediator.cpp, line 591
[3740] WARNING: getting z level of unregistered window: file g:\temp\pal\xpfe\appshell\nsWindowMediator.cpp, line 591
[3740] WARNING: getting z level of unregistered window: file g:\temp\pal\xpfe\appshell\nsWindowMediator.cpp, line 591
++DOCSHELL 05EF2800 == 2 [pid = 3740] [id = 2]
++DOMWINDOW == 3 (05EF2C00) [pid = 3740] [serial = 3] [outer = 00000000]
++DOMWINDOW == 4 (061D5C00) [pid = 3740] [serial = 4] [outer = 05EF2C00]
++DOMWINDOW == 5 (061D9400) [pid = 3740] [serial = 5] [outer = 04E60400]
Assertion failure: NS_IsMainThread() (Can't own error reporting off-main-thread yet), at g:\temp\pal\dom\base\ScriptSettings.cpp:475
JavaScript strict warning: chrome://browser/content/nsContextMenu.js, line 2: TypeError: setting a property that has only a getter
++DOCSHELL 064B7800 == 3 [pid = 3740] [id = 3]
++DOMWINDOW == 6 (064B7C00) [pid = 3740] [serial = 6] [outer = 00000000]
JavaScript strict warning: chrome://browser/content/utilityOverlay.js, line 3: TypeError: setting a property that has only a getter
JavaScript strict warning: chrome://browser/content/utilityOverlay.js, line 5: TypeError: setting a property that has only a getter
JavaScript strict warning: chrome://browser/content/utilityOverlay.js, line 3: TypeError: setting a property that has only a getter
JavaScript strict warning: chrome://browser/content/utilityOverlay.js, line 5: TypeError: setting a property that has only a getter
JavaScript strict warning: chrome://browser/content/places/placesOverlay.xul, line 27: TypeError: setting a property that has only a getter
JavaScript strict warning: chrome://browser/content/autorecovery.js, line 18: TypeError: setting a property that has only a getter
#01: NS_LogCOMPtrAddRef[xul +0xbcbc70]
#02: NS_LogCOMPtrAddRef[xul +0xbd6eab]
#03: NS_LogCOMPtrAddRef[xul +0xbd6d42]
#04: NS_LogCOMPtrAddRef[xul +0xbd696d]
#05: NS_LogCOMPtrAddRef[xul +0xbd6a20]
#06: NS_LogCOMPtrAddRef[xul +0xbd6fbe]
#07: NS_LogCOMPtrAddRef[xul +0xbd25f8]
#08: NS_LogCOMPtrAddRef[xul +0xbd2791]
#09: imgLoader::SupportImageWithMimeType[xul +0x72cdff]
#10: mozilla::LoadInfo::TriggeringPrincipal[xul +0xecb1cc]
#11: mozilla::LoadInfo::TriggeringPrincipal[xul +0xee59be]
#12: mozilla::LoadInfo::TriggeringPrincipal[xul +0xede194]
#13: XRE_AddStaticComponent[xul +0x85890]
#14: NS_InitXPCOM[xul +0xa0ef5]
#15: mozilla::LoadInfo::TriggeringPrincipal[xul +0xeccd67]
#16: mozilla::LoadInfo::TriggeringPrincipal[xul +0xebabe3]
#17: XRE_AddStaticComponent[xul +0x85890]
#18: NS_InitXPCOM[xul +0xa0ef5]
#19: mozilla::LoadInfo::Release[xul +0x230e44]
#20: mozilla::LoadInfo::Release[xul +0x21b959]
#21: mozilla::LoadInfo::Release[xul +0x21b911]
#22: mozilla::LoadInfo::Release[xul +0x21b744]
#23: XRE_AddStaticComponent[xul +0x88aa3]
#24: PR_NativeCreateThread[nss3 +0x214ea8]
#25: PR_SetSysfdTableSize[nss3 +0x20681f]
#26: _get_flsindex[MSVCR120 +0x2c01d]
#27: _get_flsindex[MSVCR120 +0x2c001]
#28: BaseThreadInitThunk[KERNEL32 +0x17c04]
#29: RtlInitializeExceptionChain[ntdll +0x5ab8f]
#30: RtlInitializeExceptionChain[ntdll +0x5ab5a]
[3740] WARNING: NS_ENSURE_SUCCESS(rv, rv) failed with result 0x80040111: file g:\temp\pal\dom\base\nsFrameLoader.cpp, line 288
++DOCSHELL 0B32F000 == 4 [pid = 3740] [id = 4]
++DOMWINDOW == 7 (06A29010) [pid = 3740] [serial = 7] [outer = 00000000]
++DOMWINDOW == 8 (06A293F0) [pid = 3740] [serial = 8] [outer = 06A29010]