1 files changed, 10 insertions, 0 deletions
diff --git a/browser/components/preferences/dialogs/connection.js b/browser/components/preferences/dialogs/connection.js
index 0b21b1b5a5..33e8deb279 100644
--- a/browser/components/preferences/dialogs/connection.js
+++ b/browser/components/preferences/dialogs/connection.js
@@ -16,6 +16,7 @@ Preferences.addAll([
   // both initialized when network.proxy.type initialization triggers a call to
   // gConnectionsDialog.updateReloadButton().
   { id: "network.proxy.autoconfig_url", type: "string" },
+  { id: "network.proxy.system_wpad", type: "bool" },
   { id: "network.proxy.type", type: "int" },
   { id: "network.proxy.http", type: "string" },
   { id: "network.proxy.http_port", type: "int" },
@@ -130,11 +131,20 @@ var gConnectionsDialog = {
   checkForSystemProxy() {
     if ("@mozilla.org/system-proxy-settings;1" in Cc) {
       document.getElementById("systemPref").removeAttribute("hidden");
+
+      var systemWpadAllowed = Preferences.get(
+        "network.proxy.system_wpad.allowed"
+      );
+      if (systemWpadAllowed && Services.appinfo.OS == "WINNT") {
+        document.getElementById("systemWpad").removeAttribute("hidden");
+      }
     }
   },
 
   proxyTypeChanged() {
     var proxyTypePref = Preferences.get("network.proxy.type");
+    var systemWpadPref = Preferences.get("network.proxy.system_wpad");
+    systemWpadPref.updateControlDisabledState(proxyTypePref.value != 5);
 
     // Update http
     var httpProxyURLPref = Preferences.get("network.proxy.http");