This bug is for crash report bp-b31aee9d-25af-402b-a402-8cd200200729.

Top 10 frames of crashing thread:

0 XUL XUL@0x333dc03 
1 XUL XUL@0x3ea067 
2 XUL XUL@0x333df56 
3 XUL XUL@0xf4725a 
4 XUL XUL@0xf4693b 
5 XUL XUL@0x157e6ba 
6 XUL XUL@0xf46a3d 
7 XUL XUL@0xf4648c 
8 XUL XUL@0x3f543c 
9 XUL XUL@0xf44f2c 

Unfortunately I don't have some reliable STR at the moment. I've left my pc in sleep mode overnight (Firefox 80.0b1 was still open before entering in sleep mode). After exiting from sleep mode I closed Firefox via the Hamburger menu which lead to a browser crash.

I will investigate this further and update this bug's description once I find some reliable STR.

Note
I'm not sure if this is the right component for this issue. Please feel free to change this if necessary.

I think those XUL@0x... symbols just means that Socorro failed to resolve the libxul addresses to a name.
So this crash could be about anything...

Emil: Has this happened to you again since the initial report?

If not, I think we should close as INVALID for now since the crash report is not actionable as-is.

Sorry, did not mean to close yet until confirmation from initial reporter.

I tried to reproduce this crash several times each day after exiting sleep mode but couldn't.

It may have been a one time crash. I'll keep an eye on this one and will reopen the issue if this happens again and if some reliable steps are found.