EXISTING_TARGET_FOR_GET=exist_target_for_get
HTTP_OTHER_REFERER_URL=http://www.mozilla.org/index.html
CURRENT_REFERER_URL=<html_root>/api/PlugletManager_getURL_3/PlugletManager_getURL.html
HTTP_URL_FOR_GET=<cgi_root>/api/PlugletManager_getURL_3/verify_referer.cgi
