--- a/dom/base/nsDOMWindowUtils.cpp
+++ b/dom/base/nsDOMWindowUtils.cpp
@@ -3475,17 +3475,17 @@ nsDOMWindowUtils::LoadSheet(nsIURI *aShe
   NS_ENSURE_TRUE(doc, NS_ERROR_FAILURE);
 
   nsIDocument::additionalSheetType type = convertSheetType(aSheetType);
 
   return doc->LoadAdditionalStyleSheet(type, aSheetURI);
 }
 
 NS_IMETHODIMP
-nsDOMWindowUtils::LoadSheetFromURIString(const nsACString& aSheetURI, uint32_t aSheetType)
+nsDOMWindowUtils::LoadSheetUsingURIString(const nsACString& aSheetURI, uint32_t aSheetType)
 {
   MOZ_RELEASE_ASSERT(nsContentUtils::IsCallerChrome());
 
   nsCOMPtr<nsIURI> uri;
   nsresult rv = NS_NewURI(getter_AddRefs(uri), aSheetURI);
   NS_ENSURE_SUCCESS(rv, rv);
 
   return LoadSheet(uri, aSheetType);
@@ -3528,16 +3528,28 @@ nsDOMWindowUtils::RemoveSheet(nsIURI *aS
 
   nsIDocument::additionalSheetType type = convertSheetType(aSheetType);
 
   doc->RemoveAdditionalStyleSheet(type, aSheetURI);
   return NS_OK;
 }
 
 NS_IMETHODIMP
+nsDOMWindowUtils::RemoveSheetUsingURIString(const nsACString& aSheetURI, uint32_t aSheetType)
+{
+  MOZ_RELEASE_ASSERT(nsContentUtils::IsCallerChrome());
+
+  nsCOMPtr<nsIURI> uri;
+  nsresult rv = NS_NewURI(getter_AddRefs(uri), aSheetURI);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return RemoveSheet(uri, aSheetType);
+}
+
+NS_IMETHODIMP
 nsDOMWindowUtils::GetIsHandlingUserInput(bool* aHandlingUserInput)
 {
   MOZ_RELEASE_ASSERT(nsContentUtils::IsCallerChrome());
 
   *aHandlingUserInput = EventStateManager::IsHandlingUserInput();
 
   return NS_OK;
 }

--- a/dom/interfaces/base/nsIDOMWindowUtils.idl
+++ b/dom/interfaces/base/nsIDOMWindowUtils.idl
@@ -46,17 +46,17 @@ interface nsIDOMClientRect;
 interface nsIURI;
 interface nsIDOMEventTarget;
 interface nsIRunnable;
 interface nsICompositionStringSynthesizer;
 interface nsITranslationNodeList;
 interface nsIJSRAIIHelper;
 interface nsIContentPermissionRequest;
 
-[scriptable, uuid(f7e4d5da-4dd0-455a-b448-d0224c17fd10)]
+[scriptable, uuid(e293355b-ae7f-4ef7-9237-452bcf3e9e6b)]
 interface nsIDOMWindowUtils : nsISupports {
 
   /**
    * Image animation mode of the window. When this attribute's value
    * is changed, the implementation should set all images in the window
    * to the given value. That is, when set to kDontAnimMode, all images
    * will stop animating. The attribute's value must be one of the
    * animationMode values from imgIContainer.
@@ -1596,17 +1596,17 @@ interface nsIDOMWindowUtils : nsISupport
    *
    * Sheets added via this API take effect immediately on the document.
    */
   void loadSheet(in nsIURI sheetURI, in unsigned long type);
 
   /**
    * Same as the above method but allows passing the URI as a string.
    */
-  void loadSheetFromURIString(in ACString sheetURI, in unsigned long type);
+  void loadSheetUsingURIString(in ACString sheetURI, in unsigned long type);
 
   /**
    * Adds a style sheet to the list of additional style sheets of the document.
    *
    * Style sheets can be preloaded with nsIStyleSheetService.preloadSheet.
    *
    * Sheets added via this API take effect immediately on the document.
    */
@@ -1614,16 +1614,21 @@ interface nsIDOMWindowUtils : nsISupport
 
   /**
    * Remove the document style sheet at |sheetURI| from the list of additional 
    * style sheets of the document.  The removal takes effect immediately.
    */
   void removeSheet(in nsIURI sheetURI, in unsigned long type);
 
   /**
+   * Same as the above method but allows passing the URI as a string.
+   */
+  void removeSheetUsingURIString(in ACString sheetURI, in unsigned long type);
+
+  /**
    * Returns true if a user input is being handled.
    *
    * This calls EventStateManager::IsHandlingUserInput().
    */
   readonly attribute boolean isHandlingUserInput;
 
   /**
    * After calling the method, the window for which this DOMWindowUtils