Initiate the system if necessary (start Xvfb if it's not running, connect to it, start our program instance). This is called automatically when you create a Browser instance, so you shouldn't have to worry about it unless you want to set some of the values of the arguments. You can specify use of a certain X display by setting the `display` parameter, and can stop pykhtml registering its exception handler (the
excepthook function) by setting `registerExceptionHandler` to False.