Oh, I never think of browsers in terms of dimensions. I think I keep my browser window small so that I don't have scroll back and forth all the time, so that explains why the image is smaller for me on ATP.
I have an old "granny-sized" monitor to match my 12" TV sets, which usually are smirked at by people who come to my home.
I don't replace things until they stop working, so maybe I'll upgrade someday.