Crash report: https://crash-stats.mozilla.org/report/index/65fd84c2-1df8-4cc3-829f-ee57d0201216

Reason: EXCEPTION_ACCESS_VIOLATION_READ

Top 10 frames of crashing thread:

0 nvwgf2um_cfg.dll nvwgf2um_cfg.dll@0x7c88d5 
1 nvwgf2um_cfg.dll nvwgf2um_cfg.dll@0x9cd828 
2 nvwgf2um_cfg.dll nvwgf2um_cfg.dll@0x5262b 
3 nvwgf2um_cfg.dll nvwgf2um_cfg.dll@0x7407e 
4 nvwgf2um_cfg.dll nvwgf2um_cfg.dll@0x45446 
5 nvwgf2um_cfg.dll nvwgf2um_cfg.dll@0x45645 
6 d3d11.dll virtual long __thiscall NDXGI::CDevice::CreateDriverInstance 
7 d3d11.dll long __thiscall CDevice::CreateDriverInstance 
8 d3d11.dll long __thiscall CContext::LUCCompleteLayerConstruction 
9 d3d11.dll virtual long __stdcall CBridgeImpl<struct ILayeredUseCounted, struct ID3D11LayeredUseCounted, class CLayeredObject<class CContext> >::LUCCompleteLayerConstruction 

This tab crash happened for me with Firefox 85.0b2(20201215185920) on Windows 10x86 when I scrolled down the Reddit page and opened the Facebook page as well. Unfortunately, I don't have some reliable steps to reproduce.
I don't know which is the right component for this. Please feel free to change it. Thank you!

Alexandru could you please attach a copy of your about:support? What nVidia driver version are you using?

(In reply to Jamie Nicol [:jnicol] from comment #1)

Alexandru could you please attach a copy of your about:support? What nVidia driver version are you using?

Hello! The attached support file is from today and I also have one from crash day here
My driver version in the Nvidia control panel is 388.13 and in the device manager is 23.21.13.8813. It seems that the drivers are really outdated on Windows 10x86, I was using the ones that were automatically installed from Windows. If more information is needed please let me know. Thank you!

Closing because no crashes reported for 12 weeks.