Update message on Sync page for non-Firefox users

Bug 1084535

bedrock/firefox/templates/firefox/sync-new.html

@@ -54,7 +54,11 @@
 
       <div class="show-not-fx warning">
         <p>
-          {{ _('Sync is just one of the great features you’ll only get with Firefox. Discover them all!') }}
+          {% if l10n_has_tag('firefox_sync_non_fx') or settings.DEV %}
+            {{ _('Sync is just one of the great features you’ll only get with Firefox.') }}
+          {% else %}
+            {{ _('Sync is just one of the great features you’ll only get with Firefox. Discover them all!') }}
+          {% endif %}
         </p>
       </div>
 

media/css/firefox/sync.less

@@ -128,6 +128,9 @@
     }
 }
 
+.state-not-fx .primary .warning p:before {
+    background: none;
+}
 
 .secondary {
     background: #fff;