I see a rather old bug, which has received more and more attention over time. https://bugzilla.mozilla.org/show_bug.cgi?id=646168

As best I can see there are still not steps to reliably reproduce the bug, even after 11 years so a developer can make a fix and test it.

What is apparent is there appears to be a correlation between using the unified folder view and using Shift +Delete to delete mail perhaps while reading mail in a new window.

Do those things sound like what you were doing when if crashed?

The report indicates McAfee is the antivirus. I would remove (not disable) McAfee or run Windows in safe mode to see if it is the cause.

https://support.mozilla.org/en-US/questions/994969

The report indicates McAfee is the antivirus. I would remove (not disable) McAfee or run Windows in safe mode to see if it is the cause. https://support.mozilla.org/en-US/questions/994969

Antivirus might be a good starting point when nothing else is known. But I don't see evidence of it in this reporter's crash reports, no for other reports that I examined of https://bugzilla.mozilla.org/show_bug.cgi?id=646168

sfhowes said

The report indicates McAfee is the antivirus. I would remove (not disable) McAfee or run Windows in safe mode to see if it is the cause. https://support.mozilla.org/en-US/questions/994969

Antivirus might be a good starting point when nothing else is known. But I don't see evidence of it in this reporter's crash reports, no for other reports that I examined of https://bugzilla.mozilla.org/show_bug.cgi?id=646168

The TelemetryEnvironment in the reports shows McAfee (see picture).

Craig, Does https://bugzilla.mozilla.org/show_bug.cgi?id=646168#c23 help you reproduce the issue?

Good catch. I would expect to see McAfee in the Modules list, which is where I had looked.