diff --git a/delphi-backend/UMainForm.pas b/delphi-backend/UMainForm.pas
index 33299e2..51651c5 100644
--- a/delphi-backend/UMainForm.pas
+++ b/delphi-backend/UMainForm.pas
@@ -1514,6 +1514,13 @@ initialization
   // Must be set BEFORE the TMS FNC WebBrowser instantiates its
   // CoreWebView2Environment, hence the unit initialization block.
   SetEnvironmentVariable('WEBVIEW2_ADDITIONAL_BROWSER_ARGUMENTS',
+    // Keep the renderer responsive while the window is hidden in the tray.
+    // Without these, Chromium freezes/throttles a backgrounded renderer, so
+    // the first autofill hotkey after a tray-only start (Start with Windows)
+    // waits 3-5s for the renderer to wake before onAutofillRequest runs.
+    '--disable-background-timer-throttling ' +
+    '--disable-backgrounding-occluded-windows ' +
+    '--disable-renderer-backgrounding ' +
     '--disable-background-networking ' +
     '--disable-sync ' +
     '--disable-component-update ' +