I think that's irrelevant, because the desktop enlarges before I get even to the choice of accounts window, much less the full SeaMonkey window where I would have a choice of window size.

To answer your question, however, I always (or ALMOST always) have the operating browser window occupy the entire screen.

If I choose to have the browser window adjustable and move it down or aside, I see that the desktop is still enlarged.

When I get off the web, I get a VERY brief screen with text and an icon, but it's gone within a half second or so (too quick to read), before I'm back to the desktop, properly proportioned.

Dave Oesterreich