Comment 11 for bug 115484

It seems like fixing would be a simple matter of x and y positioning and sizing.
I do some GUI programming (in Java) and that would be how I would do it there.
Can it be that different in C++/XUL?

As an example of centering the box in reference to the Mozilla window:
int height=450;
int width=300;
newCardBox.setSize(width,height);
int setLeft=(((mozWindow.getWidth()-width)/2)+mozWindow.getX());
int setRight=(((mozWindow.getHeight()-height)/2)+mozWindow.getY());
newCardBox.setLocation(setLeft,setRight);
newCardBox.show();

Yes, its Java pseudo-code, not C++, but the logic is good. Can't something
similar to this be implemented for the New Card box?