nsIBrowserGlue is a dirty and rather fluid interface to host shared utility 
 methods used by browser UI code, but which are not local to a browser window.
 The component implementing this interface is meant to be a singleton
 (service) and should progressively replace some of the shared "glue" code 
 scattered in browser/base/content (e.g. bits of utilOverlay.js, 
 contentAreaUtils.js, globalOverlay.js, browser.js), avoiding dynamic 
 inclusion and initialization of a ton of JS code for *each* window.
 Dued to its nature and origin, this interface won't probably be the most
 elegant or stable in the mozilla codebase, but its aim is rather pragmatic:
 1) reducing the performance overhead which affects browser window load;
 2) allow global hooks (e.g. startup and shutdown observers) which survive
 browser windows to accomplish browser-related activities, such as shutdown
 sanitization (see bug #284086)
[scriptable, uuid(6d340848-9bc1-49a3-9073-99932bbc2a11)]
interface nsIBrowserGlue : nsISupports

Methods

 
 Deletes privacy sensitive data according to user preferences

 @param aParentWindow an optionally null window which is the parent of the 
        sanitization dialog (if it has to be shown per user preferences)
void sanitize(in nsIDOMWindow aParentWindow)