diff --git a/src/background.js b/src/background.js
index c4b65f0..22813fd 100644
--- a/src/background.js
+++ b/src/background.js
@@ -9,6 +9,8 @@ let removeOnClassify = true; // Standardwert true
 const maxTokenCount = 10000; // Maximale Anzahl der Tokens in der Datenbank.
 let tagKeyToNameMap = {}; // Mapping von Tag-Key zu Tag-Name
 let tagNameToKeyMap = {}; // Mapping von Tag-Name zu Tag-Key
+const lastCheckTimestamps = {}; // Stores the last check timestamp for each folder to optimize performance (in milliseconds) 
+
 
 // translate-Funktion zur Nutzung von i18n
 function trans(messageName, placeholders = []) {
@@ -188,6 +190,14 @@ function initialize() {
       }
     });
 
+    // Sheduler for updateUsageData
+    messenger.alarms.create("updateUsageDataAlarm", { periodInMinutes: 10 });
+    messenger.alarms.onAlarm.addListener((alarm) => {
+      if (alarm.name === "updateUsageDataAlarm") {
+        updateUsageData();
+      }
+    });
+
     })
     .catch((error) => {
       console.error("Error during initialization:", error);
@@ -441,9 +451,14 @@ function getMessageTags(messageId) {
  * @param {object} folder - Information about the displayed folder.
  */
 
+/**
+ * Handles the display of a folder and checks for new emails.
+ * @param {Object} tab - The mail tab object.
+ * @param {Object} folder - The folder object.
+ */
 async function onFolderDisplayed(tab, folder) {
-  updateUsageData();
-  
+  const CHECK_INTERVAL = 5 * 60 * 1000; // 5 minutes
+  console.debug("onFolderDisplayed")
   if (folder && folder.accountId && folder.path) {
     const accountId = folder.accountId;
 
@@ -456,6 +471,16 @@ async function onFolderDisplayed(tab, folder) {
     try {
       const folderKey = `${accountId}:${folder.path}`;
 
+      // To optimize performance, skip the check if the last one occurred recently.
+      const now = Date.now();
+      // Check the last time this folder was processed
+      const lastCheck = lastCheckTimestamps[folderKey] || 0;
+      if (now - lastCheck < CHECK_INTERVAL) {
+        return;
+      }
+      // Update the last check timestamp
+      lastCheckTimestamps[folderKey] = now;
+
       // Load the last processed date for this folder from storage
       let result = await messenger.storage.local.get("folderLastProcessed");
       let folderLastProcessed = result.folderLastProcessed || {};
@@ -553,6 +578,8 @@ async function onFolderDisplayed(tab, folder) {
 
 
 
+
+
 // learnTagFromMail Funktion
 function learnTagFromMail(messageId, tagName, isPositive) {
   console.log(`Training with message ID: ${messageId} and tag: ${tagName}`);
diff --git a/src/bayes.js b/src/bayes.js
index 3457255..1d6fce4 100644
--- a/src/bayes.js
+++ b/src/bayes.js
@@ -135,7 +135,7 @@ function calculateBayesProbability(tokens, data, returnTokenContributions = fals
 
   const probability = Math.exp(logProbPositive - logSumExp); // Normalisierte positive Wahrscheinlichkeit
 
-  console.log("Calculated probability:", probability);
+  console.debug("Calculated probability:", probability);
 
   // Rückgabe der Token-Beiträge, falls aktiviert
   if (returnTokenContributions) {
diff --git a/src/donation_handler.js b/src/donation_handler.js
index 3c662cf..c988016 100644
--- a/src/donation_handler.js
+++ b/src/donation_handler.js
@@ -49,7 +49,6 @@ async function verifyDonationCode(cryptedemail, code) {
  * Wenn die Checksum nicht mit der berechneten übereinstimmt, wird der usage_counter auf 30 gesetzt.
  */
 async function updateUsageData() {
-    console.debug(`updateUsageData`);
     const currentData = await messenger.storage.local.get(['donation_handler']);
     const donationHandler = currentData.donation_handler || {};
 
@@ -58,7 +57,7 @@ async function updateUsageData() {
         const shortHash = await short_sha256(donationHandler.donation_mail);
         const isValid = await verifyDonationCode(shortHash, donationHandler.donation_key);
         if (isValid) {
-            console.debug("Gültiger donation_key. updateUsageData.");
+            console.debug("Valid donation_key found.");
             return;
         }
     }
@@ -89,6 +88,7 @@ async function updateUsageData() {
 
     // Wenn die Checksum korrekt ist, prüfe, ob ein neuer Tag begonnen hat
     if (today != lastCheckDate) {
+        console.debug(`updateUsageData (new day)`);
         const newUsageCounter = (donationHandler.usage_counter || 0) + 1;
         const newLastCheckDate = today;
 
diff --git a/src/manifest.json b/src/manifest.json
index 5b9facc..0eeb790 100644
--- a/src/manifest.json
+++ b/src/manifest.json
@@ -1,7 +1,7 @@
 {
   "manifest_version": 2,
   "name": "PrioMailbox",
-  "version": "1.3.1",
+  "version": "1.3.3",
   "default_locale": "en",
   "description": "PrioMailbox organizes your emails in Thunderbird with intelligent, trainable tags. Important messages are highlighted, while unimportant ones are hidden.",
   "icons": {
@@ -23,7 +23,8 @@
     "menus",
     "notifications",
     "accountsRead",
-    "accountsFolders"
+    "accountsFolders",
+    "alarms"
   ],
   "browser_action": {
       "default_popup": "popup/popup.html",
diff --git a/src/utils.js b/src/utils.js
index 708044b..32c36b6 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -105,11 +105,6 @@ function calculateKnownTokenTypesPercentage(tokens, tokenList) {
   const knownUnigramsPercentage = totalUnigrams > 0 ? (knownUnigrams / totalUnigrams) * 100 : 0;
   const knownBigramsPercentage = totalBigrams > 0 ? (knownBigrams / totalBigrams) * 100 : 0;
 
-  // Log the results for debugging
-  console.log(`Known unigrams: ${knownUnigramsPercentage.toFixed(2)}% (Known: ${knownUnigrams}, Total: ${totalUnigrams})`);
-  console.log(`Known bigrams: ${knownBigramsPercentage.toFixed(2)}% (Known: ${knownBigrams}, Total: ${totalBigrams})`);
-
-  // Return the percentages
   return { 
       knownUnigramsPercentage,
       knownBigramsPercentage