Type ‘about:config’ in the browser url
then search for the terms below and replace with whats below.
browser.newtab.url > Set to "www.google.co.uk"
browser.tabs.closeButtons > Set to 3 (moves single close button to end)
browser.tabs.onTop > Set to False
browser.fullscreen.autohide > Set to False (fullscreen - just show buttons)
