How to get URL for FF4

Will Jing <[email protected]> Thu, 10 Feb 2011 09:24:30 -0800 (PST)

Newsgroups	gmane.comp.mozilla.accessibility
Organization	http://groups.google.com
Message-ID	<[email protected]>

Hi All,

For firefox3.*, I  can get the URL via IAccessible->IServiceProvider-
>ISimpleDOMDocument. But seems we don't have the handle to
"MozillaContentWindowClass" for FF4. Any idea?

Thanks.