diff --git a/overlays/nixpak/firefox.nix b/overlays/nixpak/firefox.nix
index 60551cf..d18444d 100644
--- a/overlays/nixpak/firefox.nix
+++ b/overlays/nixpak/firefox.nix
@@ -75,11 +75,22 @@
       };
     };
   in
-    prev.wrapFirefox sandboxed-firefox-esr.config.env {
+    prev.wrapFirefox (sandboxed-firefox-esr.config.env // {
+      inherit (prev.firefox-esr)
+        version
+        meta
+        langPath
+        updateScript
+        pkgconfig
+        buildPackages
+        patches
+        extraPatches
+        extraPrefs
+        extraPolicies
+        nativeMessagingHosts
+        cfg;
+    }) {
       applicationName = "firefox-esr";
       desktopName = "Firefox ESR (Sandboxed)";
-      extraPolicies = {
-        DisableAppUpdate = true;
-      };
     };
 }