Remove banner role, and add noreferrer and noopener to target=_blank

_includes/header.html

@@ -1,8 +1,8 @@
-<header class="site-header" role="banner">
+<header class="site-header">
     <div class="grid-container grid-x grid-padding-x">
         <div class="cell small-12">
             <h3 class="logo">
-            	<a href="{{ "/" | relative_url }}">Content 
+            	<a href="{{ "/" | relative_url }}">Content
             		<br>Guidelines</a>
             	<small class="tagline">Optimize Your Product Page</small>
             </h3>
@@ -17,10 +17,10 @@
 					      		<li><a href="{{ item.url | relative_url }}">{{ item.title }}</a></li>
 					        {% endif %}
 					    {% endfor %}
-					    <li><a href="https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/Listing" target="_blank">More Tips</a></li>
+					    <li><a href="https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/Listing" target="_blank" rel="noreferrer noopener">More Tips</a></li>
 					</ul>
 
-					<p><a href="https://addons.mozilla.org/en-US/firefox/#login" class="button" target="_blank">Edit Product Page</a></p>
+					<p><a href="https://addons.mozilla.org/en-US/firefox/#login" class="button" target="_blank" rel="noreferrer noopener">Edit Product Page</a></p>
 					<p><a href="{{ "/" | relative_url }}" class="back">Extension Workshop</a></p>
 					<p class="site-metadata"><a href="">Site Feedback</a>
 						<br><a href="">Changelog</a> v0.6.8
@@ -30,4 +30,4 @@
             </div>
         </div>
     </div>
-</header>
+</header>