diff --git a/index.html b/index.html
index 0078906..71d8718 100644
--- a/index.html
+++ b/index.html
@@ -424,6 +424,10 @@
     <div id="packet-history" class="fullscreen-overlay"></div>
 
     <div id="database-error" class="fullscreen-overlay"></div>
+    <script
+      src="https://js-de.sentry-cdn.com/017b4494d7038e3e789fe38378b53fb2.min.js"
+      crossorigin="anonymous"
+    ></script>
 
     <script src="lib/loglevel.min.js"></script>
     <script src="lib/uuidv4.min.js" type="module"></script>
@@ -447,6 +451,7 @@
     <script src="js/main.js" defer="defer" type="module"></script>
     <script src="lib/notify.min.js" type="text/javascript"></script>
 
+
     <script></script>
   </body>
 </html>
diff --git a/js/sentry.js b/js/sentry.js
index 034c04d..78cbe70 100644
--- a/js/sentry.js
+++ b/js/sentry.js
@@ -1,7 +1,6 @@
 /**
  * Sentry Error Monitoring initializer for RTS.
- *
- * Configurable via window.SENTRY_DSN or window.RTS_SENTRY_DSN or <meta name="sentry-dsn" content="...">
+ * Optimized for Free Tier with beforeSend noise filtering.
  */
 
 export function initSentry() {
@@ -13,28 +12,58 @@ export function initSentry() {
       return;
     }
 
+    const beforeSend = (event, hint) => {
+      const error = hint?.originalException;
+      const message = event?.message || (error && error.message) || "";
+
+      // Ignore common harmless browser/network noise to preserve Sentry free quota
+      const noisePatterns = [
+        /ResizeObserver loop/i,
+        /Failed to fetch/i,
+        /NetworkError/i,
+        /Load failed/i,
+        /Script error/i,
+        /top.GLOBALS/i,
+        /chrome-extension:\/\//i,
+        /moz-extension:\/\//i,
+      ];
+
+      if (noisePatterns.some((pattern) => pattern.test(message))) {
+        return null;
+      }
+
+      return event;
+    };
+
+    const config = {
+      dsn: dsn,
+      environment: window.SENTRY_ENVIRONMENT || "production",
+      tracesSampleRate: parseFloat(window.SENTRY_TRACES_SAMPLE_RATE || "0.02"),
+      beforeSend: beforeSend,
+      ignoreErrors: [
+        "ResizeObserver loop limit exceeded",
+        "ResizeObserver loop completed with undelivered notifications.",
+        "NetworkError when attempting to fetch resource.",
+        "Failed to fetch",
+        "Load failed",
+      ],
+    };
+
     if (window.Sentry) {
       window.Sentry.init({
-        dsn: dsn,
-        environment: window.SENTRY_ENVIRONMENT || 'production',
-        tracesSampleRate: parseFloat(window.SENTRY_TRACES_SAMPLE_RATE || '0.05'),
+        ...config,
         integrations: [
-          window.Sentry.browserTracingIntegration ? window.Sentry.browserTracingIntegration() : null
-        ].filter(Boolean)
+          window.Sentry.browserTracingIntegration ? window.Sentry.browserTracingIntegration() : null,
+        ].filter(Boolean),
       });
       console.log("[RTS] Sentry error monitoring initialized");
     } else {
-      // Dynamically load Sentry bundle if DSN is set but Sentry library tag isn't explicitly loaded
-      const script = document.createElement('script');
-      script.src = 'https://browser.sentry-cdn.com/8.48.0/bundle.min.js';
-      script.crossOrigin = 'anonymous';
+      const script = document.createElement("script");
+      script.src = "https://browser.sentry-cdn.com/8.48.0/bundle.min.js";
+      script.crossOrigin = "anonymous";
       script.onload = () => {
         if (window.Sentry) {
-          window.Sentry.init({
-            dsn: dsn,
-            environment: window.SENTRY_ENVIRONMENT || 'production',
-            tracesSampleRate: parseFloat(window.SENTRY_TRACES_SAMPLE_RATE || '0.05')
-          });
+          window.Sentry.init(config);
           console.log("[RTS] Sentry error monitoring initialized via dynamic load");
         }
       };