On a unix system you can run any browser headlessly by using a headless X11 display such as Xvfb. Instead of having a real screen, Xvfb uses an in-memory frame

On a unix system you can run any browser headlessly by using a headless X11 display such as Xvfb. Instead of having a real screen, Xvfb uses an in-memory framebuffer for screen output that you can screenshot etc if needed. It's as easy as: Xvfb :123 & DISPLAY=:123 firefox ### firefox is now running and outputting ### to the framebuffer display on :123, and ### can be driven by WebDriver etc.