May be Win 8.1 64
Usually is.
In Ice Dragon.

Well in relation to a smaller screen (on now).
the 17 Pav inch doesn't widen out, maybe it's fb too.
One thing is it scrolls up and down in it's own Iframe, rather than use general scroll.
Win 7 32 the latter is not an issue, but either way whole thing doesn't fit in screen.