Index: openacs-4/packages/xowiki/www/resources/chat.js
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowiki/www/resources/chat.js,v
diff -u -r1.1.2.1 -r1.1.2.2
--- openacs-4/packages/xowiki/www/resources/chat.js	26 Jan 2024 16:37:28 -0000	1.1.2.1
+++ openacs-4/packages/xowiki/www/resources/chat.js	9 Feb 2024 09:49:24 -0000	1.1.2.2
@@ -199,6 +199,16 @@
                 setTimeout(chatSubscribe, 10000, subscribeURL);
             }
         });
+
+        //
+        // Close the EventSource connection before we leave/reload the
+        // page: some browsers, such as Firefox at the time of
+        // writing, may complain otherwise.
+        //
+        window.addEventListener('beforeunload', (e) => {
+            source.close();
+        });
+
         break;
     case 'scripted':
         //