diff --git a/src/router.tsx b/src/router.tsx
index 56988a9c..c8c66584 100644
--- a/src/router.tsx
+++ b/src/router.tsx
@@ -58,6 +58,53 @@ 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 third-party ad script errors (Publift Fuse and NoBid)
+      beforeSend(event, hint) {
+        const error = hint.originalException
+
+        // Check if error is from third-party ad scripts
+        const isAdScriptError = event.exception?.values?.some((exception) => {
+          const frames = exception.stacktrace?.frames || []
+
+          // Check if any frame in the stack trace is from ad scripts
+          const hasAdScriptFrame = frames.some((frame) => {
+            const filename = frame.filename || ''
+            return (
+              filename.includes('/media/native/') ||
+              filename.includes('fuse.js') ||
+              filename.includes('fuseplatform.net') ||
+              filename.includes('/nobid/blocking_script.js')
+            )
+          })
+
+          // Check if error message matches known patterns
+          const errorMessage = exception.value || ''
+          const hasKnownErrorPattern =
+            errorMessage.includes('contextWindow.parent') ||
+            errorMessage.includes('null is not an object') ||
+            errorMessage.includes('is not a function')
+
+          return hasAdScriptFrame && hasKnownErrorPattern
+        })
+
+        // Also check the error object directly if available
+        const isAdScriptErrorFromHint =
+          error &&
+          typeof error === 'object' &&
+          'message' in error &&
+          typeof error.message === 'string' &&
+          (error.message.includes('contextWindow.parent') ||
+            error.message.includes('null is not an object') ||
+            error.message.includes('is not a function'))
+
+        // Drop the event if it's from ad scripts
+        if (isAdScriptError || isAdScriptErrorFromHint) {
+          console.debug('Filtered out ad script error from Sentry:', event)
+          return null
+        }
+
+        return event
+      },
     })
   }