diff --git a/firefox/20-manual.yml b/firefox/20-manual.yml
index 42f47c9e..f7295f0b 100644
--- a/firefox/20-manual.yml
+++ b/firefox/20-manual.yml
@@ -8,7 +8,8 @@ manual:
 
   https_proxy:
     description: HTTPS Proxy
-    hidden: true
+    hidden:
+      variable: _.use_for_https
 
     address:
       description: HTTPS address