Full screen tab-only was ChromeOS in 2009-2011: https://www.youtube.com/watch?v=KRPjkiw0dYU https://www.youtube.com/watch?v=KRPjkiw0dYU Then they put a fairly

Full screen tab-only was ChromeOS in 2009-2011: https://www.youtube.com/watch?v=KRPjkiw0dYU https://www.youtube.com/watch?v=KRPjkiw0dYU Then they put a fairly conventional window manager and taskbar/dock around those in 2012, https://www.theverge.com/2012/4/26/2978163/aura-chrome-os-hands-on https://www.theverge.com/2012/4/26/2978163/aura-chrome-os-ha...