NetScopeDetector by Antidetect

See what websites are doing behind the scenes

A website can make dozens or even hundreds of network requests while you are simply viewing a page. Most requests are expected, but some may involve third-party services, reveal unexpected tracking activity, probe local network resources, or communicate with services you did not know were running.

NetScopeDetector gives you real-time visibility into browser network activity directly inside Firefox.

Monitor HTTP traffic, investigate suspicious connections, inspect requests and cookies, and control network activity from a convenient dark sidebar — without leaving the page you are browsing.

Detect possible local-network probing

One of NetScopeDetector’s key capabilities is monitoring activity that may indicate attempts to probe local network resources.

Instead of wondering what a website is doing in the background, you can observe network activity as it happens and investigate unexpected connections. NetScopeDetector is designed as an inspection and research tool for privacy-conscious users, web developers, penetration testers, and security researchers.

Monitor HTTP traffic in real time

See browser HTTP requests as they happen and quickly distinguish request methods and response status codes. Color-coded activity helps you find important events in a busy capture session, while the built-in sidebar keeps network information accessible alongside the current website.

Inspect requests, headers, cookies, and POST data

NetScopeDetector provides detailed information about browser requests, including:

• HTTP methods and response status codes
• Request and response headers
• Request URLs and domains
• Cookies associated with individual domains
• POST form bodies, when available
• Captured browser network activity

This makes NetScopeDetector useful for debugging web applications, investigating unexpected requests, testing APIs, and understanding how websites communicate with external services.

Control browser network requests

NetScopeDetector also helps you control browser traffic during testing and investigation. Create URL patterns to block unwanted requests, and add or modify outgoing HTTP headers on the fly.

These controls can be useful when you are:

• Testing a website or web application
• Debugging an API integration
• Investigating application behavior
• Reproducing a network-related issue
• Performing authorized security research

Protect sensitive information during inspection

Network captures may contain passwords, authentication tokens, cookies, and other confidential values. NetScopeDetector supports sensitive-field masking so that private information can be hidden while you inspect captured traffic.

Always review captured data carefully and use request inspection only on websites and systems you are authorized to test.

Key features

• Possible port scan detection — monitor activity that may indicate attempts to probe local network resources.
• Real-time HTTP monitoring — watch browser HTTP requests as they happen.
• Color-coded requests — distinguish HTTP methods and response status codes quickly.
• Dark sidebar interface — inspect network activity without leaving the current page.
• Request blocking — block requests matching specified URL patterns.
• Header modification — add or modify outgoing HTTP request headers on the fly.
• Global search — search captured network activity with highlighted matches.
• Sensitive data masking — hide passwords, tokens, and other sensitive fields during inspection.
• Cookie inspection — inspect and delete cookies for individual domains.
• POST body capture — inspect submitted form data when available.
• Pause and resume capture — stop and restart network capture whenever needed.
• Keyboard shortcut — press Ctrl+Shift+N to toggle the NetScopeDetector sidebar.

Who is NetScopeDetector for?

Privacy-conscious users can understand what websites are doing in the background and investigate unexpected network activity.

Security researchers and penetration testers can analyze browser traffic, inspect suspicious connections, review headers and cookies, and investigate possible local-network probing during authorized testing.

Web developers and QA engineers can debug HTTP requests, APIs, headers, form submissions, and application behavior directly from Firefox.

Why monitor browser network activity?

Modern websites are more than the page displayed in your browser. A single page can communicate with numerous servers, load third-party resources, send requests in the background, store cookies, and interact with different network services.

Network monitoring gives you a way to see these communications instead of treating the browser as a black box. NetScopeDetector puts this visibility directly into Firefox through a focused, lightweight network monitoring workflow.

Privacy and permissions

NetScopeDetector is designed for local, browser-based network inspection. The extension does not require an external account to inspect captured browser activity.

Before installation, review the permissions displayed by Firefox and make sure they are appropriate for your use case. Because captured requests may include sensitive information, use the extension responsibly and avoid sharing network captures that contain passwords, authentication tokens, cookies, or other private data.

Built for Firefox

NetScopeDetector provides a focused network monitoring and inspection workflow through a convenient Firefox sidebar.

Monitor. Inspect. Investigate. Control.