diff --git a/src/router.tsx b/src/router.tsx
index 56988a9c..a4ac4415 100644
--- a/src/router.tsx
+++ b/src/router.tsx
@@ -58,6 +58,59 @@ export function getRouter() {
       // Session Replay
       replaysSessionSampleRate: 0.1, // This sets the sample rate at 10%. You may want to change it to 100% while in development and then sample at a lower rate in production.
       replaysOnErrorSampleRate: 1.0, // If you're not already sampling the entire session, change the sample rate to 100% when sampling sessions where errors occur.
+      // Filter out known third-party errors from ad scripts
+      beforeSend(event, hint) {
+        // Check if the error originated from third-party ad scripts
+        const frames = event.exception?.values?.[0]?.stacktrace?.frames
+        const errorMessage = event.exception?.values?.[0]?.value || ''
+        const originalException = hint.originalException
+
+        // Filter out errors from Publift Fuse ad viewability scripts
+        if (frames) {
+          const hasThirdPartyAdScript = frames.some((frame) => {
+            const filename = frame.filename || ''
+            return (
+              filename.includes('/nobid/blocking_script.js') ||
+              filename.includes('/media/native/') ||
+              filename.includes('fuse.js') ||
+              filename.includes('fuseplatform.net')
+            )
+          })
+
+          // Filter race condition errors from ad scripts
+          if (hasThirdPartyAdScript) {
+            const isRaceConditionError =
+              errorMessage.includes('is not a function') ||
+              errorMessage.includes('null is not an object') ||
+              errorMessage.includes('contextWindow.parent')
+
+            if (isRaceConditionError) {
+              return null // Drop the error
+            }
+          }
+        }
+
+        // Also check the error message directly for ad script errors
+        if (
+          originalException &&
+          typeof originalException === 'object' &&
+          'message' in originalException
+        ) {
+          const message = String(originalException.message)
+          if (
+            (message.includes('is not a function') ||
+              message.includes('null is not an object') ||
+              message.includes('contextWindow.parent')) &&
+            (message.includes('blocking_script') ||
+              message.includes('fuse') ||
+              message.includes('fuseplatform'))
+          ) {
+            return null // Drop the error
+          }
+        }
+
+        return event
+      },
     })
   }