On my Lenovo C330 ChromeOS, I think the ssh app 0.39 opened in a nominal sized window initially, but I can expand it to almost-full with the fullscreen control in the top right of the window.
The fullscreen button (next to the refresh circle on my keyboard), toggles between the nominal size and a full screen with no borders.
Other windows open at that last used size. I thought each host connection had its own remembered size, but that doesn't seem true, today.
The size seems to be remembered for the next opening, although it has the border.
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Clarence A Dold - Santa Rosa, CA, USA
GPS: 38.47,-122.66, QTH CM88ql
Claren...@Gmail.com