JS Uploader: "jpg" added to the list of allowed file extensions

js_upload/js_upload.php

@@ -50,7 +50,11 @@ function js_upload_post_init(array &$b)
 	// list of valid extensions
 	$allowedExtensions = [];
 	foreach (Images::IMAGETYPES as $type) {
-		$allowedExtensions[] = image_type_to_extension($type, false);
+		$extension = image_type_to_extension($type, false);
+		if ($extension == 'jpeg') {
+			$allowedExtensions[] = 'jpg';
+		}
+		$allowedExtensions[] = $extension;
 	}
 
 	// max file size in bytes