Ticket #5455: 5455_3.patch

_source/core/dom/element.js

@@ -850 +850 @@
                         :
                                 function()
                                 {
-                                        var attributes = this.$.attributes;
-                                        return ( attributes.length > 1 || ( attributes.length == 1 && attributes[0].nodeName != '_cke_expando' ) );
+                                        var attributes = this.$.attributes, 
+                                                len = attributes.length,
+                                                nodeName = ( len == 1) && attributes[0].nodeName,
+                                                excludeProps = { '_cke_expando' : 1, '_moz_dirty' : 1};
+
+                                        // [FireFox] when copy a elment(span,strong,em...) and paste it,
+                                        // the pasted element will be added a *_moz_dirty* property automatic(#5455)
+                                        return ( len > 1 ) || ( nodeName && !excludeProps[ nodeName ] );
                                 },
 
                 /**