Browser Sentinel

Monitor browser traffic for unencrypted connections, hidden servers, and extensions phoning home beyond their declared permissions.

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 - Monitoring runs locally in your browser; traffic metadata is held in memory only and cleared on demand or when the browser restarts — nothing is persisted - To enrich the dashboard, the extension sends destination hostnames to Google Public DNS (dns.google) and resolved IP addresses to ipinfo.io to show hosting provider and country. Only hostnames and IP addresses of the servers you connect to are sent — never page content, cookies, or personal data - No analytics, no telemetry, no accounts, and no data sent to our own servers Built by Cosmos Web Tech — Digital Solutions for Sydney Businesses