diff --git a/core/vendor/filemanager/dialog.php b/core/vendor/filemanager/dialog.php
index c41d50d1..077d1283 100755
--- a/core/vendor/filemanager/dialog.php
+++ b/core/vendor/filemanager/dialog.php
@@ -234,16 +234,9 @@ if (!isset($_GET['type'])){
 
 $extensions=null;
 if (isset($_GET['extensions'])){
-	$extensions = json_decode(urldecode($_GET['extensions']));
-	$ext_tmp = array();
-	foreach($extensions as $extension){
-		$extension = fix_strtolower($extension);
-		if(in_array( $extension, $config['ext'])){
-			$ext_tmp[]=$extension;
-		}
-	}
+	$extensions = explode(',', urldecode($_GET['extensions']));
 	if($extensions){
-		$ext = $ext_tmp;
+		$ext = $extensions;
 		$show_filter_buttons = false;
 	}
 }