diff --git a/web/cashtab/extension/src/background.js b/web/cashtab/extension/src/background.js
--- a/web/cashtab/extension/src/background.js
+++ b/web/cashtab/extension/src/background.js
@@ -167,7 +167,7 @@
         .join('&');
 
     // create new notification popup
-    const popupWindow = await openWindow({
+    await openWindow({
         url: `index.html#/send?${queryString}`,
         type: 'popup',
         width: NOTIFICATION_WIDTH,