[adrianmonk]

> How do you prevent a website from faking the address bar?

Well, my suggestion was to add additional URL(s) into the same address bar that already exists at the top. (Hence the breadcrumb widget.)

My original motivation was to not wreck the layout of pages that are currently counting on the inside of the iframe to be big enough to hold all the expected content.

But it also protects the additional URL(s) from being drawn over because you already can't draw over the address bar.

That mobile address bar hiding hack is pretty scary, though.