diff --git a/firefox/10-manual.yml b/firefox/10-manual.yml
index 973e436d..304fc84a 100644
--- a/firefox/10-manual.yml
+++ b/firefox/10-manual.yml
@@ -11,4 +11,9 @@ manual:  # Manual proxy configuration
       type: domainname
       params:
         allow_ip: true
+
+    port:
+      description: HTTP Port
+      type: port
+      default: 8080
 ...