Product Firefox Version 40.0.3 Release Channel release OS Windows NT OS Version 6.3.9600 KERNELBASE.dll = Microsoft ntdll.dll = Microsoft qipcap.dll = Websense Data Endpoint IPSEng32.dll = Symantec Intrusion Detection IPSLdr32.dll = Symantec Intrusion Detection +++++++++++++++++++++++++++++ This is for Sumo's Related Bugs 1181091 NEW --- Firefox 40 crashes on startup [@ @0x0 | ScopedXPCOMStartup::~ScopedXPCOMStartup() ] with Websense Endpoint ---------------------- Download the current full installer for Websense and save it. Remove Websense from your system. Reboot. Use a register scanner/repair. '''Do Not''' install Websense at this time. ------------- Perform a System File Check to fix corrupted system files Win 7, 8, 10, Vista: https://support.microsoft.com/en-us/kb/929833 See if there are updates for your graphics drivers https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration