[troyb]

By snapshot xiamenese means a workspace snapshot not a save window size which I suspect you may have meant.. (Apologies if you did mean workspace snapshot).

Try this, close all your windows.
In the workspace menu, click on Show Workspaces.
In this window, click on the camera button at the bottom of the window (double check to make sure all your browser windows are closed first).
Quit
Relaunch.

Do you still see the small window?