Index: _source/plugins/image/dialogs/image.js
===================================================================
--- _source/plugins/image/dialogs/image.js	(revision 5861)
+++ _source/plugins/image/dialogs/image.js	(revision )
@@ -1127,7 +1127,7 @@
 							{
 								action : 'Browse',
 								target: 'Link:txtUrl',
-								url: editor.config.filebrowserImageBrowseLinkUrl || editor.config.filebrowserBrowseUrl
+								url: editor.config.filebrowserImageBrowseLinkUrl
 							},
 							style : 'float:right',
 							hidden : true,
Index: _source/plugins/filebrowser/plugin.js
===================================================================
--- _source/plugins/filebrowser/plugin.js	(revision 5949)
+++ _source/plugins/filebrowser/plugin.js	(revision )
@@ -261,7 +261,8 @@
 
 			if ( element.filebrowser.action == 'Browse' )
 			{
-				var url = element.filebrowser.url || editor.config[ 'filebrowser' + ucFirst( dialogName ) + 'BrowseUrl' ]
+				var url = ( undefined !== element.filebrowser.url )
+					? element.filebrowser.url : editor.config[ 'filebrowser' + ucFirst( dialogName ) + 'BrowseUrl' ]
 							|| editor.config.filebrowserBrowseUrl;
 
 				if ( url )
@@ -273,7 +274,8 @@
 			}
 			else if ( element.filebrowser.action == 'QuickUpload' && element[ 'for' ] )
 			{
-				url =  element.filebrowser.url || editor.config[ 'filebrowser' + ucFirst( dialogName ) + 'UploadUrl' ]
+				url = ( undefined !== element.filebrowser.url )
+					? element.filebrowser.url : editor.config[ 'filebrowser' + ucFirst( dialogName ) + 'UploadUrl' ]
 							|| editor.config.filebrowserUploadUrl;
 
 				if ( url )