The crash report flagged these; One report showed no cause for the crash ============================ Another shows; Signature OOM OutOfMemory Total Virtual Memory 4294836224 Available Virtual Memory 280735744 System Memory Use Percentage 86 Available Page File 2642530304 Available Physical Memory 566894592 OOM Allocation Size 2048 ============================== The last shows; Signature hang Process Type plugin Shockwave Flash Version:17.0.0.169 ----------------------------------------------------------- If you have problems with current Shockwave Flash plugin versions then check this: * 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'''