remove extra slash

templates/base.html

@@ -4,7 +4,7 @@
     <title>{% block title %}{{ _('Mozilla Add-ons') }}{% endblock %}</title>
 
     <link rel="shortcut icon" type="image/x-icon"
-          href="{{ MEDIA_URL}}/img/favicon.ico">
+          href="{{ MEDIA_URL}}img/favicon.ico">
     <meta charset="utf-8">
 
     <link rel="stylesheet" type="text/css" media="screen,projection,tv"