I don’t understand how this is a “hack” or how it shows that “No browsers are safe”.
It doesn’t display the page.
I can see it as a bug, but...
I’ts a “hack” because some people have found a way to deliberately crash your machine, and it shows that no browsers are safe because to date it appears that there is no “perfect” browser out there as any of them can fail in one way or another.
(Just not so much on Opera, that is. So Far...)