I think I had one crash with Firefox on Linux during the past 6 years and that was a weird edge case where I tried to do something during an update process.
The last two times Firefox crashed on me, both of the computers had bad memory
Same here. Firefox has always been really stable for me but after moving to Linux I had some crashing which coincided with a new bios update. Turns out my memory timings were a bit too high, it couldn't handle the XMP profile with the new bios.
Same for me until 114, which has been crashing constantly. I can't open deepl.com for example. 114.0.2 fixes several crashes but not mine.