Index: src/wp-includes/media-template.php
===================================================================
--- src/wp-includes/media-template.php	(revision 36746)
+++ src/wp-includes/media-template.php	(working copy)
@@ -1232,7 +1232,7 @@
 	</script>
 
 	<script type="text/html" id="tmpl-crop-content">
-		<img class="crop-image" src="{{ data.url }}" alt="">
+		<img class="crop-image" src="{{ data.url }}"  alt="{{data.title}}">
 		<div class="upload-errors"></div>
 	</script>
 
@@ -1240,7 +1240,7 @@
 		<h2><?php _e( 'Preview' ); ?></h2>
 		<strong><?php _e( 'As a browser icon' ); ?></strong>
 		<div class="favicon-preview">
-			<img src="images/browser.png" class="browser-preview" width="182" height="" alt="" />
+			<img src="images/browser.png" class="browser-preview" width="182" height="" alt="<?php esc_attr_e( 'Preview as a browser icon' ); ?>" />
 
 			<div class="favicon">
 				<img id="preview-favicon" src="{{ data.url }}" alt="<?php esc_attr_e( 'Preview as a browser icon' ); ?>"/>