diff --git a/firefox/20-manual.yml b/firefox/20-manual.yml
index 61e31b08..cb802450 100644
--- a/firefox/20-manual.yml
+++ b/firefox/20-manual.yml
@@ -27,10 +27,13 @@ manual:
     address:
       redefine: true
       description: SOCKS proxy address
+      default: null
+      mandatory: false
 
     port:
       redefine: true
       description: SOCKS proxy port
+      default: 1080
 
     version:
       description: SOCKS host version used by proxy