Index: /FCKeditor/trunk/_whatsnew.html
===================================================================
--- /FCKeditor/trunk/_whatsnew.html	(revision 2307)
+++ /FCKeditor/trunk/_whatsnew.html	(revision 2308)
@@ -43,5 +43,7 @@
 		Fixed Bugs:</p>
 	<ul>
-		<li></li>
+		<li>[<a target="_blank" href="http://dev.fckeditor.net/ticket/2407">#2407</a>] Fixed the issue 
+			where FCK.InsertHtml() is no longer removing selected contents after content insertion
+			in Firefox.</li>
 	</ul>
 	<h3>
Index: /FCKeditor/trunk/editor/_source/internals/fck_gecko.js
===================================================================
--- /FCKeditor/trunk/editor/_source/internals/fck_gecko.js	(revision 2307)
+++ /FCKeditor/trunk/editor/_source/internals/fck_gecko.js	(revision 2308)
@@ -372,4 +372,5 @@
 		range = new FCKDomRange( this.EditorWindow ) ;
 		range.MoveToSelection() ;
+		range.DeleteContents() ;
 		range.InsertNode( docFrag.RootNode ) ;