diff --git a/containers/libreportal/frontend/js/components/topbar.js b/containers/libreportal/frontend/js/components/topbar.js
index a3ed49b..8e32942 100755
--- a/containers/libreportal/frontend/js/components/topbar.js
+++ b/containers/libreportal/frontend/js/components/topbar.js
@@ -89,6 +89,7 @@ class TopbarComponent {
 
     let count = 0;
     let resetTimer = null;
+    let currentToast = null;      // single rolling toast — updated in place
 
     document.addEventListener('click', (e) => {
       const logo = e.target.closest('.libreportal-logo');
@@ -96,7 +97,10 @@ class TopbarComponent {
       count++;
 
       if (resetTimer) clearTimeout(resetTimer);
-      resetTimer = setTimeout(() => { count = 0; }, RESET_AFTER_MS);
+      resetTimer = setTimeout(() => {
+        count = 0;
+        currentToast = null;  // next sequence starts a fresh toast
+      }, RESET_AFTER_MS);
 
       const remaining = TARGET_CLICKS - count;
       const devOn = (window.systemConfigs?.CFG_DEV_MODE === 'true');
@@ -104,10 +108,22 @@ class TopbarComponent {
       const noun = devOn ? 'developer mode' : 'a developer';
 
       if (remaining > 0 && count >= TOAST_FROM) {
-        this._devToast(`You are ${remaining} click${remaining === 1 ? '' : 's'} away from ${verb} ${noun}.`, 'info');
+        const msg = `You are ${remaining} click${remaining === 1 ? '' : 's'} away from ${verb} ${noun}.`;
+        // If the rolling toast is still in the DOM, mutate its message
+        // text in place instead of stacking another notification. When
+        // it's been auto-removed (10s lifetime) we open a fresh one.
+        const msgEl = currentToast && currentToast.parentElement
+          ? currentToast.querySelector('.notification-message')
+          : null;
+        if (msgEl) {
+          msgEl.innerHTML = msg;
+        } else {
+          currentToast = this._devToast(msg, 'info');
+        }
       } else if (remaining === 0) {
         count = 0;
         clearTimeout(resetTimer);
+        currentToast = null;
         this._setDevMode(!devOn);
       }
     });
@@ -160,15 +176,18 @@ class TopbarComponent {
   }
 
   // Toast helper — uses the project's notification system if loaded, else
-  // a quiet console echo so dev-mode UX never blocks page render.
+  // a quiet console echo so dev-mode UX never blocks page render. Returns
+  // the notification DOM element when the real system is available, so
+  // callers (the easter-egg countdown) can mutate the message in place
+  // instead of stacking new toasts on each click.
   _devToast(message, kind = 'info') {
     if (window.notificationSystem?.show) {
-      window.notificationSystem.show(message, kind);
+      return window.notificationSystem.show(message, kind);
     } else if (typeof window.showNotification === 'function') {
-      window.showNotification(message, kind);
-    } else {
-      console.log(`[dev-mode] ${message}`);
+      return window.showNotification(message, kind);
     }
+    console.log(`[dev-mode] ${message}`);
+    return null;
   }
 
   // Flip CFG_DEV_MODE via the standard config-update task (same path the