The new mobile Safari app built in to iOS 7 has a whole new multi-windowed interface, which allows for a near limitless number of windows that you can open at once. Simply hit the icon in the far right-hand bottom corner to bring up the “tabs” interface, and then tap the big central Plus button to add a new page to the list.
But what about closing those windows? They’ve got an X icon in the upper left of each tab/window, but the X is super tiny, and not always easy to tap. Sometimes I end up activating a window instead of closing it. Ain’t nobody got time for that.