loadURIWithFlags( uri, flags, referrer, charset, postData )reloadWithFlags method, the following flags are also valid:
LOAD_FLAGS_IS_REFRESH: This flag is used when the URL is loaded because of a meta tag refresh or redirect.LOAD_FLAGS_IS_LINK: This flag is used when the URL is loaded because a user clicked on a link. The HTTP Referer header is set accordingly.LOAD_FLAGS_BYPASS_HISTORY: Do not add the URL to the session history.LOAD_FLAGS_REPLACE_HISTORY: Replace the current URL in the session history with a new one. This flag might be used for a redirect.(See nsIWebNavigation.loadURI() for details on the referrer and postData parameters.)