Browser Sentinel

Browser Sentinel gives you complete visibility into what your browser is doing behind the scenes — every request, every extension, every server your data touches. HOW IT WORKS 1. Load the extension — it immediately begins intercepting all browser network requests 2. Click the icon for a quick summary of alerts, unencrypted connections, and flagged extensions 3. Open the full dashboard for deep inspection of traffic and installed extensions 4. Receive notifications when an extension contacts a server it never declared permission for TRAFFIC MONITOR Every request your browser makes — from every tab and every extension — is logged and analysed in real time: - Protocol: HTTPS (encrypted) vs HTTP (plaintext/exposed) flagged immediately - Destination: hostname, resolved IP address, hosting provider and country - CDN/Proxy detection: identifies servers hidden behind Cloudflare, Amazon CloudFront, Fastly, Akamai and more - Source identification: which tab or which extension initiated each request - Filterable by protocol, source type, CDN status, and free-text search EXTENSION AUDITOR Every installed Chrome extension is listed alongside its declared host_permissions from its manifest: - See exactly which domains each extension is allowed to contact - Any request to a domain NOT listed in the extension's declared permissions is flagged as UNDECLARED - Extensions with <all_urls> permission are highlighted — these can contact any server - Request counts per extension reveal which extensions are most active - Instant notification when an extension phones home to an undeclared server ALERTS A dedicated alerts view consolidates all findings: - Undeclared extension requests — extension contacted a server beyond its stated permissions - Unencrypted connections — data sent in plaintext over HTTP - Hidden servers — destination is masked behind a CDN or reverse proxy WHO IS IT FOR - Privacy-conscious users who want to know what data their browser is sending and where - Security researchers auditing the behaviour of installed Chrome extensions - IT administrators checking for rogue extensions on managed devices - Developers verifying their own extensions only contact declared servers - Anyone curious whether their extensions are doing more than they claim PRIVACY - No data is collected, stored, or transmitted by this extension - All monitoring happens locally in your browser — nothing leaves your device - Traffic logs are held in memory only and cleared on demand - No analytics, no telemetry, no external servers Built by Cosmos Web Tech — Digital Solutions for Sydney Businesses