The default selenium driver instantiates the DefaultSelenium class that talks to a remotely running Selenium RC. This driver recognizes the following driver URL:

http://host:port/browserStartCommand

The host and port specifies the endpoint where the Selenium RC runs, and the browserStartCommand portion specifies the browser to run. Several concrete examples shown below:

http://localhost:4444/*firefox
http://some.computer:4445/*iexplore

This driver is packaged into the factory API jar, and thus can be used without having any additional dependency.