diff --git a/firefox/20-manual.yml b/firefox/20-manual.yml
index f1f87d9c..a298cb42 100644
--- a/firefox/20-manual.yml
+++ b/firefox/20-manual.yml
@@ -13,6 +13,7 @@ manual:
         {% if _.use_for_https %}
           HTTPS is same has HTTP
         {% endif %}
+      description: in HTTPS case if "_.use_for_https" is set to "true"
     dynamic:
       - HTTPS
       - SOCKS