Is there not a scroll bar at the bottom of the window to allow you to scroll to the right side?
If I reduce the window size here, so that I see similar to what you posted, then that is what I get.
From the pics you posted it appears you have a screen that is not hi-res enough to show the full page - if the window was full screen.
In any case I have no such problem here ...... I see the full page unless I reduce the size of the FF window, at which stage I get a scroll bar along the bottom to allow me to view it.