Whistone for IE Free - Version 1.10 Whistone is a plug-in that will provide your browser with some popular and useful features that can be seen on many famous MDI browsers. For example, you may close all browser windows by using [Ctrl]+[w] shortcut or holding [Ctrl] key while click on the close button. Other popular features include "open behind", "close whole site", etc. You can keep Whistone FREE without date limitation. However, you may register it online for extended features.