It has options for random ordering, slide speed, and shrinking images to fit the screen. To get a fullscreen view, use your browser options, e.g., for Chrome and Firefox on a Mac, it's Shift+Cmd+F. Under Windows, it should be F11.
Go to http://userscripts.org/scripts/show/125386 and click on the green "Install" button.
Tested in Chrome and Firefox, though only on a Mac. I've also tested it with the 4chan Chrome extension, and it plays nice with it.