Sometimes epiphany freezes my entire system. I suspect the real culprit is badly designed webpages, but epiphany needs to be robust against that kind of thing.

Case in point: http://www.reuters.com/article/us-britain-eu-article-idUSKCN12C2PZ

This caused a lock up so severe I was unable to do anything other than turn the computer off at the switch. I tried again after rebooting, and noticed that memory usage immediately maxed out (over 16gb) when loading this page before another full system lockup (even ttys, ssh, and magick keys become unresponsive).

My guess is the slideshow (which appears as twelve separate objects if scripts are blocked in firefox, and appeared to be loading as separate objects in epiphany before freezing) is doing something crazy that epiphany doesn't handle well.

This isn't the first webpage to cause this kind of lockup, and it might just be a fluke, but I do have these from time to time and it is often reproducible by reloading the last page loaded before a lockup.