diff --git a/js-helper/goofyHistory.js b/js-helper/goofyHistory.js
index 37bcad7..d8e31b8 100644
--- a/js-helper/goofyHistory.js
+++ b/js-helper/goofyHistory.js
@@ -1,20 +1,68 @@
-const unique = new Set();
+// max track buffer for localStorage
+// when the limit is reached, old tracks will be removed from the beginning, and new ones will be added to the end
+const MAX_TRACKS = 1000;
 
-function goofyHistory(e, urlForm, idBox) {
+// max delay between switching tracks (ms)
+const MAX_DELAY = 1000;
 
-    const uri = e?.item?.uri;
+function debounce(func, wait) {
+    let timeout;
+    return function executedFunction(...args) {
+        const later = () => {
+            clearTimeout(timeout);
+            func(...args);
+        };
+        clearTimeout(timeout);
+        timeout = setTimeout(later, wait);
+    };
+}
 
-    if (uri && uri.includes('spotify:track:') && !unique.has(uri)) {
+const loadTracksFromStorage = () => {
+    try {
+        const savedTracks = localStorage.getItem('sentSpotifyTracks');
+        return new Set(savedTracks ? JSON.parse(savedTracks) : []);
+    } catch (error) {
+        console.error('Error loading tracks from localStorage:', error);
+        return new Set();
+    }
+};
 
-        unique.add(uri);
+const saveTracksToStorage = (tracks) => {
+    try {
+        let tracksArray = [...tracks];
 
-        fetch(urlForm, {
+        if (tracksArray.length > MAX_TRACKS) {
+            tracksArray = tracksArray.slice(-MAX_TRACKS);
+        }
+
+        localStorage.setItem('sentSpotifyTracks', JSON.stringify(tracksArray));
+    } catch (error) {
+        console.error('Error saving tracks to localStorage:', error);
+    }
+};
+
+const unique = loadTracksFromStorage();
+
+async function sendToGoogleForm(uri, urlForm, idBox) {
+    try {
+        await fetch(urlForm, {
             "headers": {
                 "content-type": "application/x-www-form-urlencoded",
             },
             "body": "entry." + idBox + "=" + uri,
             "method": "POST",
             "mode": "no-cors",
-        }).catch(error => console.error('error sending uri to google form:', error));
+        });
+        saveTracksToStorage(unique);
+    } catch (error) {
+        console.error('Error sending uri to google form:', error);
     }
-}
\ No newline at end of file
+}
+
+const goofyHistory = debounce(async (e, urlForm, idBox) => {
+    const uri = e?.item?.uri;
+    if (uri && uri.includes('spotify:track:') && !unique.has(uri)) {
+        unique.add(uri);
+        await sendToGoogleForm(uri, urlForm, idBox);
+    }
+}, MAX_DELAY);
\ No newline at end of file