diff --git a/firefox/10-manual.yml b/firefox/10-manual.yml
index 40a493dc..62069c90 100644
--- a/firefox/10-manual.yml
+++ b/firefox/10-manual.yml
@@ -13,8 +13,12 @@ manual:
     type: proxy
 
     address:
+      redefine: true
       default: null
+      description: HTTP proxy address
 
     port:
+      redefine: true
       default: 8080
+      description: HTTP proxy port
 ...