diff --git a/firefox/20-manual.yml b/firefox/20-manual.yml
index ac200904..06db3cd3 100644
--- a/firefox/20-manual.yml
+++ b/firefox/20-manual.yml
@@ -13,6 +13,7 @@ manual:
         {% if my_identifier == 'HTTPS' and _.use_for_https %}
           HTTPS is same has HTTP
         {% endif %}
+      description: in HTTPS case if "_.use_for_https" is set to True
       params:
         my_identifier:
           type: identifier