diff --git a/public/index.html b/public/index.html
index d868cb7..470cd7f 100644
--- a/public/index.html
+++ b/public/index.html
@@ -823,7 +823,7 @@ async function downloadExtension() {
   const btn = event.target;
   btn.disabled = true; btn.textContent = '⏳ Preparing download…';
   try {
-    const res = await fetch('/api/extension/download', { headers: { 'Authorization': 'Bearer ' + authToken } });
+    const res = await fetch('/api/extension/download', { headers: { 'x-auth-token': authToken || '' } });
     if (!res.ok) throw new Error(`Server error ${res.status}`);
     const blob = await res.blob();
     const url  = URL.createObjectURL(blob);