Is it crashing or just hanging? Could be Malware, run a deep scan first ofc
Check to see if the crash happens in Safe Mode (see below).
Try a clean reinstall (see Firefox keeps crashing at startup).
Otherwise, follow these steps in order.
Table of Contents
Update your software
Update Firefox
Update and troubleshoot your Flash plugin
Update Windows
Update your drivers
Update your Internet Security software
Check for viruses or spyware
Check to see if the crash happens in Safe Mode
The crash still happens in Safe Mode
The crash doesn't happen in Safe Mode
Check your hardware
Check your RAM for errors
Get help fixing this crash
Ask for help in the Community Support forum
Did you try to follow the official troubleshoot page of Firefox?
– CaldeiraG – 2019-11-15T11:37:07.560@CaldeiraG Thank you, but I don't suppose they would provide information regarding sudden automated random closing of firefox, or do they? – JackBixuis – 2019-11-15T16:11:18.820