Crash report: https://crash-stats.mozilla.org/report/index/4e66f7b7-850a-4937-9e0e-b90df0200908

Top 10 frames of crashing thread:

0 xul.dll xul.dll@0x3496791 
1 xul.dll xul.dll@0x34a33f0 
2 xul.dll xul.dll@0x35f21da 
3 xul.dll xul.dll@0x3619f27 
4 xul.dll xul.dll@0x3619e51 
5 xul.dll xul.dll@0x3629cdd 
6 xul.dll xul.dll@0x36251af 
7 xul.dll xul.dll@0x361ee89 
8 xul.dll xul.dll@0x361e752 
9 xul.dll xul.dll@0x360a3b7 

One crash in 3 months is not actionable, unless you have steps that someone else can use to reproduce the issue.
https://crash-stats.mozilla.org/signature/?signature=OOM%20%7C%20large%20%7C%20xul.dll%20%7C%20igdusc32.dll%20%7C%20xul.dll&date=%3E%3D2020-06-08T23%3A17%3A00.000Z&date=%3C2020-09-08T23%3A17%3A00.000Z

Worcester, is this something you personally can reproduce?

(In reply to Wayne Mery (:wsmwk) from comment #2)

Worcester, is this something you personally can reproduce?

I think so. It seems to be crashing on an email from Spiceworks, which has a lot of links in the email. It never used to crash with emails like this prior to this version on this same machine.

I expect this will be a duplicate of bug 1663781

Sorry. I'm like a robot with that. Will try to figure out how to duplicate them myself.