diff --git a/dom/base/nsFocusManager.h b/dom/base/nsFocusManager.h
index 626c831d83f..17bec430f9d 100644
--- a/dom/base/nsFocusManager.h
+++ b/dom/base/nsFocusManager.h
@@ -57,7 +57,6 @@ struct nsDelayedBlurOrFocusEvent;
  */
 
 class nsFocusManager : public nsIFocusManager,
-                       public nsIFocusManager_MOZILLA_2_0_BRANCH,
                        public nsIObserver,
                        public nsSupportsWeakReference
 {
@@ -67,7 +66,6 @@ public:
   NS_DECL_CYCLE_COLLECTING_ISUPPORTS
   NS_DECL_NSIOBSERVER
   NS_DECL_NSIFOCUSMANAGER
-  NS_DECL_NSIFOCUSMANAGER_MOZILLA_2_0_BRANCH
 
   // called to initialize and stop the focus manager at startup and shutdown
   static nsresult Init();
diff --git a/dom/interfaces/base/nsIFocusManager.idl b/dom/interfaces/base/nsIFocusManager.idl
index 2a2b3298f3d..59fb1409de2 100644
--- a/dom/interfaces/base/nsIFocusManager.idl
+++ b/dom/interfaces/base/nsIFocusManager.idl
@@ -39,7 +39,7 @@
 interface nsIDocument;
 interface nsIContent;
 
-[scriptable, uuid(5cb91200-53f6-4d35-989d-1d28ad80a0d4)]
+[scriptable, uuid(51db277b-7ee7-4bce-9b84-fd2efcd2c8bd)]
 /**
  * The focus manager deals with all focus related behaviour. Only one element
  * in the entire application may have the focus at a time; this element
@@ -261,14 +261,7 @@ interface nsIFocusManager : nsISupports
    * Fire any events that have been delayed due to synchronized actions.
    */
   [noscript] void fireDelayedEvents(in nsIDocument aDocument);
-};
 
-/**
- * This interface extends nsIFocusManager for the 2.0 branch
- */
-[scriptable, uuid(94a49833-0f6d-4d9b-b859-990546ad9b8d)]
-interface nsIFocusManager_MOZILLA_2_0_BRANCH : nsISupports
-{
   /**
    * Indicate that a plugin wishes to take the focus. This is similar to a
    * normal focus except that the widget focus is not changed. Updating the
diff --git a/layout/generic/nsObjectFrame.cpp b/layout/generic/nsObjectFrame.cpp
index b4d4148090b..d7a58a9363d 100644
--- a/layout/generic/nsObjectFrame.cpp
+++ b/layout/generic/nsObjectFrame.cpp
@@ -2551,7 +2551,7 @@ nsObjectFrame::HandleEvent(nsPresContext* aPresContext,
       return fm->SetFocus(elem, 0);
   }
   else if (anEvent->message == NS_PLUGIN_FOCUS) {
-    nsIFocusManager_MOZILLA_2_0_BRANCH* fm = nsFocusManager::GetFocusManager();
+    nsIFocusManager* fm = nsFocusManager::GetFocusManager();
     if (fm)
       return fm->FocusPlugin(GetContent());
   }