fix service worker and notifications init for FF and Safari

service-worker.js

@@ -111,35 +111,35 @@ self.addEventListener('notificationclick', event => {
 
   event.waitUntil(self.clients.matchAll({
     type: 'window',
-    includeUncontrolled: true
-  }).then(windowClients => {
-    let anyClient = null;
-    for (let i = 0; i < windowClients.length; i++) {
-      const url = new URL(windowClients[i].url);
-      if (url.hash.includes(data.topic)) {
-        // Found the Tinode tab with the right topic open.
-        return windowClients[i].focus();
-      } else {
-        // This will be the least recently used tab.
-        anyClient = windowClients[i];
+    includeUncontrolled: true})
+    .then(windowClients => {
+      let anyClient = null;
+      for (let i = 0; i < windowClients.length; i++) {
+        const url = new URL(windowClients[i].url);
+        if (url.hash.includes(data.topic)) {
+          // Found the Tinode tab with the right topic open.
+          return windowClients[i].focus();
+        } else {
+          // This will be the least recently used tab.
+          anyClient = windowClients[i];
+        }
       }
-    }
 
-    // Found tab with Tinode on a different topic,
-    // navigate to the right topic.
-    if (anyClient) {
-      const url = new URL(anyClient.url);
+      // Found tab with Tinode on a different topic,
+      // navigate to the right topic.
+      if (anyClient) {
+        const url = new URL(anyClient.url);
+        url.hash = urlHash;
+        return anyClient.focus().then(thisClient => {
+          return thisClient.navigate(url);
+        });
+      }
+
+      // Did not find a Tinode browser tab. Open one.
+      const url = new URL(self.location.origin);
       url.hash = urlHash;
-      return anyClient.focus().then(thisClient => {
-        return thisClient.navigate(url);
-      });
-    }
-
-    // Did not find a Tinode browser tab. Open one.
-    const url = new URL(self.location.origin);
-    url.hash = urlHash;
-    return clients.openWindow(url);
-  }));
+      return clients.openWindow(url);
+    }));
 });
 
 // This is needed for 'Add to Home Screen'.