Uncomment this line to enable Tab Free MultiTab FullScreen Mode?
It looks like this option was added but commented out. Maybe it doesn't work but seems like it might since it does work in single tab mode.
I believe this should hide tabs in fullscreen mode even when multiple tabs exist. You navigate only through the shortcuts in that case. It is how many of us exist in Iterm on MacOS.
<enum id='org.gnome.Terminal.TabsbarPolicy'> <value nick='always' value='0'/> <value nick='automatic' value='1'/> <!-- <value nick='never' value='2'/> --> </enum>