</pre>
* The <code>site</code> argument is interpreted as follows:
** The preferred form for this argument is an origin: scheme + "://" + domain + optional port preceded by ":" (e.g. "http://mozilla.org:80").
** If a hostname of the form "foo.com", data in the "foo.com" domain and all subdomains should be cleared. In this form domains must be in lowercase normalized ACE-encoded form, they must not contain a trailing dot, must not contain a scheme, port, or other such fields, and must contain at least one embedded dot.
** If an IP address (either IPv4 or IPv6), data for that IP should be cleared.