diff --git a/src/app/pages/client/ClientNonUIFeatures.tsx b/src/app/pages/client/ClientNonUIFeatures.tsx
index 170bc03b..a7c8b306 100644
--- a/src/app/pages/client/ClientNonUIFeatures.tsx
+++ b/src/app/pages/client/ClientNonUIFeatures.tsx
@@ -57,7 +57,11 @@ function FaviconUpdater() {
   useEffect(() => {
     let notification = false;
     let highlight = false;
+    let total = 0;
     roomToUnread.forEach((unread) => {
+      if (unread.from === null) {
+        total += unread.total;
+      }
       if (unread.total > 0) {
         notification = true;
       }
@@ -71,6 +75,11 @@ function FaviconUpdater() {
     } else {
       setFavicon(LogoSVG);
     }
+    try {
+      navigator.setAppBadge(total);
+    } catch (e) {
+      // Likely Firefox/Gecko-based and doesn't support badging API
+    }
   }, [roomToUnread]);
 
   return null;