Abs62 wrote:Small button in window corner - more chances to move cursor out of the popup windows casually. Instead of press button. And window will be closed.
Yep, plus those buttons are to be very rarely used so making them the first buttons in the toolbar would bring user attention to them but they don't deserve such attention.
In fact, I think that they should be hidden by default and only be shown if there is anything in history to go to (either back or forward). In 99% of uses the Forward button won't be visible at all.