diff --git a/src/public/javascript/invite.js b/src/public/javascript/invite.js
index c857cfe..1521ccf 100644
--- a/src/public/javascript/invite.js
+++ b/src/public/javascript/invite.js
@@ -1,6 +1,15 @@
+window.onload = function () {
+    if (!window.nostr) {
+        console.log("Nostr extension not present");
+        document.querySelector('#nostr-signup').disabled = true;
+        document.querySelector('#no-extension-nudges').style.display = 'block';
+    } else {
+        console.log("Nostr extension present");
+    }
+}
+
 async function acceptInvite() {
 
-    // check if there is nostr extension
     if (!window.nostr) {
         console.log("No Nostr extension found.");
         return { success: false, error: "No Nostr extension detected." };
diff --git a/src/views/invite.ejs b/src/views/invite.ejs
index a48003a..1bfdd4d 100644
--- a/src/views/invite.ejs
+++ b/src/views/invite.ejs
@@ -15,8 +15,30 @@
     </p>
     <p>Usa tu extensión de Nostr para darte de alta:</p>
     <form onsubmit="acceptInvite();return false">
-        <button type="submit">Alta con Nostr</button>
+        <button id="nostr-signup" type="submit">Alta con Nostr</button>
     </form>
+    <div id="no-extension-nudges" style="display:none">
+        <p>¡Atención! No se ha encontrado una extensión de Nostr en tu navegador. Puedes usar: </p>
+        <ul>
+            <li>Firefox
+                <ul>
+                    <li><a href="https://addons.mozilla.org/en-US/firefox/addon/alby/" target="_blank"
+                            rel="noopener noreferrer">Alby</a></li>
+                    <li><a href="https://addons.mozilla.org/en-US/firefox/addon/nos2x-fox/" target="_blank"
+                            rel="noopener noreferrer">nos2x-fox</a></li>
+                </ul>
+            </li>
+            <li>
+                Chrome
+                <ul>
+                    <li><a href="https://chromewebstore.google.com/detail/alby-bitcoin-wallet-for-l/iokeahhehimjnekafflcihljlcjccdbe?pli=1"
+                            target="_blank" rel="noopener noreferrer">Alby</a></li>
+                    <li><a href="https://chromewebstore.google.com/detail/nos2x/kpgefcfmnafjgpblomihpgmejjdanjjp"
+                            target="_blank" rel="noopener noreferrer">nos2x</a></li>
+                </ul>
+            </li>
+        </ul>
+    </div>
     <p>¿No tienes cuenta de Nostr? <a href="https://start.njump.me/" target="_blank" rel="noopener noreferrer">Crea
             una aquí.</a< /p>
 </body>