Seems that any JavaScript makes my debian laptop crash

I have a Dell, debian stable, laptop working with gnome environment. For several weeks Firefox crashed more and more often, resulting in mouse slows down during fews seconds, and then everything freezes, the laptop heats a lot, forcing me to hard reboot. I noticed that websites such as WhatsApp web or YouTube were specifically involved in the "crash situations". For a week now, things have gotten much worse, any request on Google, with one window and one tab, crashes. I noticed that setting javascript.enabled=false in the settings of ff preserves from crashes. Also, signal-desktop segfaults when launched. I have issues finding enlightening logs, but can try. I also tried to uninstall and reinstall all the java packages but didn't have any effect. I ran journalctl -f, then waited for firefox to crash and I have uploaded the resulting log here: https://pastebin.com/4hFgtyAj . And, probably more readable, the logs corresponding to the segfault of signal-desktop: https://pastebin.com/9b4zd2Cm . I am also running memtest and I already have more than 800 errors.