diff --git a/emain/emain.ts b/emain/emain.ts
index 1621affba..932ac1030 100644
--- a/emain/emain.ts
+++ b/emain/emain.ts
@@ -305,7 +305,7 @@ function createBrowserWindow(clientId: string, waveWindow: WaveWindow): WaveBrow
         },
         show: false,
         autoHideMenuBar: true,
-        vibrancy: "sidebar",
+        backgroundColor: "#000000",
     });
     (bwin as any).waveWindowId = waveWindow.oid;
     let readyResolve: (value: void) => void;