It first showed up in 22.0a1/20130226 and occurs only on 64-bit builds that are no longer a tier-1 platform but may highlight a 32-bit issue like empty signature crashes. It's likely a regression from bug 689623 Signature PresShell::ScheduleImageVisibilityUpdate() More Reports Search UUID 110accd4-bdf2-499e-bbe7-499422130226 Date Processed 2013-02-26 18:08:58 Uptime 2658 Install Age 44.3 minutes since version was first installed. Install Time 2013-02-26 17:23:56 Product Firefox Version 22.0a1 Build ID 20130226031002 Release Channel nightly OS Windows NT OS Version 6.2.9200 Build Architecture amd64 Build Architecture Info family 6 model 42 stepping 7 Crash Reason EXCEPTION_STACK_OVERFLOW Crash Address 0x7f8b0cf9f61 App Notes AdapterVendorID: 0x1002, AdapterDeviceID: 0x6759, AdapterSubsysID: 22061458, AdapterDriverVersion: 9.12.0.0 D2D? D2D+ DWrite? DWrite+ D3D10 Layers? D3D10 Layers+ Processor Notes sp-processor03.phx1.mozilla.com_4632:2008 EMCheckCompatibility True Adapter Vendor ID 0x1002 Adapter Device ID 0x6759 Total Virtual Memory 8796092891136 Available Virtual Memory 8795422707712 System Memory Use Percentage 21 Available Page File 10759716864 Available Physical Memory 6686892032 Frame Module Signature Source 0 xul.dll PresShell::ScheduleImageVisibilityUpdate layout/base/nsPresShell.cpp:5421 More reports at: https://crash-stats.mozilla.com/report/list?signature=PresShell%3A%3AScheduleImageVisibilityUpdate%28%29

I think the patch in bug 845337 will fix this.