There's a spike in crashes from 14.0a1/20120414. The regression range for the spike is: http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=10622eaff4fc&tochange=364f0a5a1d2d It's related to the spike for bug 700288 and bug 722312. Signature nsBlockReflowContext::ReflowBlock(nsRect const&, bool, nsCollapsingMargin&, int, bool, nsLineBox*, nsHTMLReflowState&, unsigned int&, nsBlockReflowState&) More Reports Search UUID d12b5ec9-5359-47b4-90b0-52f092120415 Date Processed 2012-04-15 06:17:37 Uptime 536 Last Crash 1.1 hours before submission Install Age 3.2 hours since version was first installed. Install Time 2012-04-15 03:03:14 Product Firefox Version 14.0a1 Build ID 20120414030731 Release Channel nightly OS Windows NT OS Version 6.1.7601 Service Pack 1 Build Architecture x86 Build Architecture Info AuthenticAMD family 20 model 1 stepping 0 Crash Reason EXCEPTION_ACCESS_VIOLATION_EXEC Crash Address 0x33c0c927 App Notes AdapterVendorID: 0x1002, AdapterDeviceID: 0x9802, AdapterSubsysID: 2aca103c, AdapterDriverVersion: 8.861.1.3000 D3D10 Layers? D3D10 Layers- D3D9 Layers? D3D9 Layers+ EMCheckCompatibility True Total Virtual Memory 2147352576 Available Virtual Memory 1786036224 System Memory Use Percentage 33 Available Page File 2412752896 Available Physical Memory 1149247488 Frame Module Signature Source 0 @0x33c0c927 1 xul.dll nsBlockReflowContext::ReflowBlock layout/generic/nsBlockReflowContext.cpp:295 2 xul.dll nsBlockFrame::ReflowBlockFrame layout/generic/nsBlockFrame.cpp:3202 3 xul.dll nsBlockFrame::ReflowLine layout/generic/nsBlockFrame.cpp:2511 4 xul.dll nsBlockFrame::ReflowDirtyLines layout/generic/nsBlockFrame.cpp:2022 5 xul.dll nsBlockFrame::Reflow layout/generic/nsBlockFrame.cpp:1071 6 xul.dll nsBlockReflowContext::ReflowBlock layout/generic/nsBlockReflowContext.cpp:295 7 xul.dll nsBlockFrame::ReflowBlockFrame layout/generic/nsBlockFrame.cpp:3202 8 xul.dll nsBlockFrame::ReflowLine layout/generic/nsBlockFrame.cpp:2511 9 xul.dll nsBlockFrame::ReflowDirtyLines layout/generic/nsBlockFrame.cpp:2022 10 xul.dll nsBlockFrame::Reflow layout/generic/nsBlockFrame.cpp:1071 11 xul.dll nsBlockReflowContext::ReflowBlock layout/generic/nsBlockReflowContext.cpp:295 12 xul.dll nsBlockFrame::ReflowBlockFrame layout/generic/nsBlockFrame.cpp:3202 13 xul.dll nsBlockFrame::ReflowLine layout/generic/nsBlockFrame.cpp:2511 14 xul.dll nsBlockFrame::ReflowDirtyLines layout/generic/nsBlockFrame.cpp:2022 15 xul.dll nsBlockFrame::Reflow layout/generic/nsBlockFrame.cpp:1071 16 xul.dll nsContainerFrame::ReflowChild layout/generic/nsContainerFrame.cpp:941 17 xul.dll nsHTMLScrollFrame::ReflowScrolledFrame layout/generic/nsGfxScrollFrame.cpp:550 18 xul.dll nsHTMLScrollFrame::ReflowContents layout/generic/nsGfxScrollFrame.cpp:648 More reports at: https://crash-stats.mozilla.com/report/list?signature=nsBlockReflowContext%3A%3AReflowBlock%28nsRect+const%26%2C+bool%2C+nsCollapsingMargin%26%2C+int%2C+bool%2C+nsLineBox*%2C+nsHTMLReflowState%26%2C+unsigned+int%26%2C+nsBlockReflowState%26%29

The spike is gone in the next build.

It acts the same way as bug 700288.

We don't need to worry about this for release any more - this isn't on our top crash lists for beta/release.

Crash volume for signature 'nsBlockReflowContext::ReflowBlock': - nightly (version 50): 0 crashes from 2016-06-06. - aurora (version 49): 0 crashes from 2016-06-07. - beta (version 48): 9 crashes from 2016-06-06. - release (version 47): 34 crashes from 2016-05-31. - esr (version 45): 2 crashes from 2016-04-07. Crash volume on the last weeks: W. N-1 W. N-2 W. N-3 W. N-4 W. N-5 W. N-6 W. N-7 - nightly 0 0 0 0 0 0 0 - aurora 0 0 0 0 0 0 0 - beta 1 1 1 0 3 2 1 - release 3 5 6 8 6 3 2 - esr 1 0 0 0 0 0 0 Affected platform: Windows

Very low volume, won't do anything about it.