Index: _source/plugins/filebrowser/plugin.js
===================================================================
--- _source/plugins/filebrowser/plugin.js	(Revision 6858)
+++ _source/plugins/filebrowser/plugin.js	(Arbeitskopie)
@@ -1,4 +1,4 @@
-/*
+/*
 Copyright (c) 2003-2011, CKSource - Frederico Knabben. All rights reserved.
 For licensing, see LICENSE.html or http://ckeditor.com/license
 */
@@ -174,7 +174,7 @@
 			params.langCode = editor.langCode;
 
 		var url = addQueryString( this.filebrowser.url, params );
-		editor.popup( url, width, height, editor.config.fileBrowserWindowFeatures );
+		editor.popup( url, width, height, editor.config.fileBrowserWindowFeatures, editor.config.filebrowserWindowName);
 	}
 
 	/*
@@ -502,6 +502,15 @@
  */
 
 /**
+ * The windowName to use in the file browser popup window.
+ * @name CKEDITOR.config.filebrowserWindowName
+ * @since 3.5.4
+ * @type String
+ * @example
+ * config.filebrowserWindowName = 'CKEditorFileBrowser';
+ */
+
+/**
  * The width of the file browser popup window. It can be a number or a percent string.
  * @name CKEDITOR.config.filebrowserWindowWidth
  * @type Number|String
Index: _source/plugins/popup/plugin.js
===================================================================
--- _source/plugins/popup/plugin.js	(Revision 6858)
+++ _source/plugins/popup/plugin.js	(Arbeitskopie)
@@ -1,4 +1,4 @@
-/*
+/*
 Copyright (c) 2003-2011, CKSource - Frederico Knabben. All rights reserved.
 For licensing, see LICENSE.html or http://ckeditor.com/license
 */
@@ -14,8 +14,9 @@
 	 * @param {String} width Popup window width.
 	 * @param {String} height Popup window height.
 	 * @param {String} options Popup window features.
+	 * @param {String} windowName Popup window name.
 	 */
-	popup : function( url, width, height, options )
+	popup : function( url, width, height, options, windowName )
 	{
 		width = width || '80%';
 		height = height || '70%';
@@ -41,7 +42,7 @@
 			',top='  + top +
 			',left=' + left;
 
-		var popupWindow = window.open( '', null, options, true );
+		var popupWindow = window.open( '', windowName, options, true );
 
 		// Blocked by a popup blocker.
 		if ( !popupWindow )
@@ -56,7 +57,7 @@
 		}
 		catch ( e )
 		{
-			popupWindow = window.open( url, null, options, true );
+			popupWindow = window.open( url, windowName, options, true );
 		}
 
 		return true;