Servlet mapping in web.xml:
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.jsf</url-pattern>
</servlet-mapping>

Create simple JSF page (start.xhtml)
Right click page and select Run As>Run On Server...
The following URL opens:
http://localhost:8080/rf/start.xhtml

The URL is not correct, it should be:
http://localhost:8080/rf/start.jsf

Same problem with /faces/* mapping