I decided to add this under suggestions, since I'd really like to have this feature in XNViewMP. (hope I am not missing something and already exists

When I open browser mode (not full screen) and I want to open image in Viewer, size of the image is the same as size of the browser. So no matter what I choose in Auto image size drop down, I am stuck with browser borders.
I'd like to have an option that if I open image from browser, regardless the size of browser, image opens in viewer in full size (expanded).
Is it and option to add this feature to this menu below? Thank you.