Eclipse RCP plugin + embedded Jetty + JSF

Take a look at setting a context in jetty. You can define it before start your server.

public class OneWebApp
{
    public static void main(String[] args) throws Exception
    {
        String jetty_home = System.getProperty("jetty.home","..");

        Server server = new Server(8080);

        WebAppContext webapp = new WebAppContext();
        webapp.setContextPath("https://stackoverflow.com/");
        webapp.setWar(jetty_home+"/webapps/test.war");
        server.setHandler(webapp);

        server.start();
        server.join();
    }
}