You point your browser at a local IP address or hostname and suddenly you have a full XFCE desktop running in your browser.
Portable and modular, Orbitiny runs on top of your existing window manager - such as KDE Plasma or GNOME - like a regular app.
Running Linux from a USB drive is possible. You can boot just about any distribution you want from USB. There are some things you should consider before going this route. I've used Linux in just about ...