The four other major browsers (Firefox, IE, Safari, Opera) have had years to copy this very useful behavior, and I can't understand why none of them have.
When I used to work at Microsoft, I explicitly requested this behavior on the internal IE8 forums (in beta at the time).
I took several tries to explain why this was important and at the end I got a very typical "Thanks for the feedback" and then the thread went cold. I don't think that PM ever understood what I was talking about, but several other commenters did.
