--- a/toolkit/content/widgets/general.xml
+++ b/toolkit/content/widgets/general.xml
@@ -156,20 +156,23 @@
       </property>
     </implementation>
   </binding>
   
   <binding id="statusbar-drag"
            extends="chrome://global/content/bindings/general.xml#statusbar">
     <implementation>
       <constructor>
-        try {
-          Components.utils.import("resource://gre/modules/WindowDraggingUtils.jsm");
-          new WindowDraggingElement(this, window);
-        } catch (e) {}
+        if (!this._draggableStarted) {
+          this._draggableStarted = true;
+          try {
+            Components.utils.import("resource://gre/modules/WindowDraggingUtils.jsm");
+            new WindowDraggingElement(this, window);
+          } catch (e) {}
+        }
       </constructor>
     </implementation>
   </binding>
 
   <binding id="statusbarpanel-iconic" display="xul:button"
            extends="chrome://global/content/bindings/general.xml#statusbarpanel">
     <content>
       <xul:image class="statusbarpanel-icon" xbl:inherits="src,src=image"/>
@@ -257,17 +260,20 @@
         </getter>
       </property>
     </implementation>
   </binding>
 
   <binding id="windowdragbox">
     <implementation>
       <constructor>
-        try {
-          Components.utils.import("resource://gre/modules/WindowDraggingUtils.jsm");
-          new WindowDraggingElement(this, window);
-        } catch (e) {}
+        if (!this._draggableStarted) {
+          this._draggableStarted = true;
+          try {
+            Components.utils.import("resource://gre/modules/WindowDraggingUtils.jsm");
+            new WindowDraggingElement(this, window);
+          } catch (e) {}
+        }
       </constructor>
     </implementation>
   </binding>
 
 </bindings>

--- a/toolkit/content/widgets/toolbar.xml
+++ b/toolkit/content/widgets/toolbar.xml
@@ -436,24 +436,27 @@
       ]]></handler>
     </handlers>
   </binding>
 
   <binding id="toolbar-drag"
            extends="chrome://global/content/bindings/toolbar.xml#toolbar">
     <implementation>
       <constructor><![CDATA[
-        try {
-          Components.utils.import("resource://gre/modules/WindowDraggingUtils.jsm");
-          let draggableThis = new WindowDraggingElement(this, window);
-          draggableThis.mouseDownCheck = function(e) {
-            // Don't move while customizing or while in full screen mode.
-            return !this.parentNode.customizing && !window.fullScreen;
-          }
-        } catch (e) {}
+        if (!this._draggableStarted) {
+          this._draggableStarted = true;
+          try {
+            Components.utils.import("resource://gre/modules/WindowDraggingUtils.jsm");
+            let draggableThis = new WindowDraggingElement(this, window);
+            draggableThis.mouseDownCheck = function(e) {
+              // Don't move while customizing or while in full screen mode.
+              return !this.parentNode.customizing && !window.fullScreen;
+            }
+          } catch (e) {}
+        }
       ]]></constructor>
     </implementation>
   </binding>
 
   <binding id="menubar" extends="chrome://global/content/bindings/toolbar.xml#toolbar-base" display="xul:menubar">
     <implementation implements="nsIAccessibleProvider">
       <property name="accessibleType" readonly="true">
         <getter>