Product Firefox Version 42.0 Build ID 20151029151421 Release Channel release OS Windows NT OS Version 6.1.7601 Service Pack 1 Nvwgf2um.dll = NVIDIA Compatible D3D10 Driver = NVIDIA Corporation ----------------------------- Do you have any other reports? * see if there are updates for your graphics drive drivers '''https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration''' * disable protected mode in the Flash plugin (Flash 11.3+ on Windows Vista and later) '''https://forums.adobe.com/message/4468493#TemporaryWorkaround''' * disable hardware acceleration in the Flash plugin '''https://forums.adobe.com/thread/891337''' See also: * '''http://kb.mozillazine.org/Flash#Troubleshooting'''