I'm curious what browser you use. I was under the impression that most of the major browsers had disabled the ability to type javascript: URLs because of self-XSS (which is a fascinating concept on the border between computer exploit and human exploit).

On Chrome 39 on CrOS, I can't type that into the URL field, and if I copy/paste it, the "javascript:" portion of the scheme magically disappears, so hitting enter takes me to a SERP. I wonder if that's done in the hope that you Google the self-XSS that you were about to run and see someone explain what's going on.