The WebWindow browser menu has some extra features not available with other browsers, e.g. reading out loud a page, displaying the source code from a frame. You can run this in IE7, IE8 or IE9 display modes. For more information see the help file.
This browser is excellent.
It's better than some of the more known ones.
After you download and run this it displays a message about upgrading in the info box, so may be better to download the newest version from the WebWindow website.