Mozilla in Cahoots with Ghostbusters?

Along my journeys across Mozilla code, I couldn't help but notice this line:

var t = document.createElementNS
("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul", "tab");

The thing that stood out most was the strange, but almost deliberate, folder structure of the XUL include file.

The keymaster and gatekeeper were key characters (no pun intended) of a niche movie called "Ghostbusters" which appeared in the early 80's. The gatekeeper of that story also happens to go by the name of Zuul (pronounced XUL).

On top of that, Mozilla's JavaScript debugger (or de-ghoster?) shares its name with Peter Venkman, one of the lead Ghostbusters.

One must wonder if there's a connection...