From charlesreid1

When simulating Man in the Middle attacks, it is useful to have a Sheep that is browsing the web. However, to keep you from having to browse the web on one machine, while you run the attack on another machine, you can use a tool to automate web surfing.

The tool is called Selenium and it is used to automate actions in the browser. You can use a FirefoxDriver to control the Firefox web browser using automated scripts.