Ever since my # to # 10 / #, I've had problems with # crashing and my home filesystem getting intermittently (and seemingly randomly) low on space. I think I just solved both problems by disabling the # Safe Browsing feature, "Try to block dangerous websites":
https://gitlab.gnome.org/GNOME/epiphany/issues/477
https://gabrielivascu.wordpress.com/2017/10/08/safe-browsing-in-epiphany/