<link type="text/css" rel="stylesheet" href="/stylesheets/moz_nav/{{ environment }}/all.css" />

<!--[if lte IE 6]>
<script src="/javascripts/moz_nav/belated.js" type="text/javascript"></script>
<![endif]-->

<!--[if lte IE 8]>
<link type="text/css" rel="stylesheet" href="/stylesheets/moz_nav/ie.css" />
<![endif]-->

<link type="text/css" rel="stylesheet" href="/stylesheets/moz_nav/{{ environment }}/all.css" />

<!--[if lte IE 6]>
<script src="/javascripts/moz_nav/belated.js" type="text/javascript"></script>
<![endif]-->

<!--[if lte IE 8]>
<link type="text/css" rel="stylesheet" href="/stylesheets/moz_nav/{{ environment }}/ie.css" />
<![endif]-->

Use production or dev stylesheet for ie.
Use production or dev stylesheet for ie.