The Proactive Shield
911CYBER VIGIL
YOUR BROWSER'S FIRST RESPONDER
Detect silent threats before they strike. Verify links before you click. Reach our incident response team in one tap, all from a free browser extension.
Free forever · Angel AI integrated · Uninstall anytime
Free Forever
No subscription required
Zero Logging
No browsing data collected
5 Browsers
Chrome · Edge · Brave · Firefox · Safari
MV3 Standard
Future-proof Manifest V3
What You Get
A tactical dashboard in your toolbar.
911CyberThe Scanner
The Shield
NOMINAL: 0 THREATS
Safe State
911Cyber⚠ Compromise Detected
Pattern: Phishing · High Entropy Domain
Threat Detected
The Six Pillars
Six tools. One extension.
Diagnostic Scan
Run an instant "Am I Hacked?" system check — detects behavioural anomalies, suspicious processes, and webdriver injection. When Angel AI offers a diagnostic during your chat, Vigil scans automatically and delivers results back in real time.
URL Verification
Paste or scan any link before you click. Shannon entropy analysis, phishing keyword detection, and TLD reputation scoring.
Legitimacy Check
Verify the authenticity of any website with IDN homoglyph detection, brand impersonation scoring, and SSL validation.
Panic Button
Direct, one-click connection to 911Cyber's incident response team. An emergency chat panel opens right over your current page.
Live Shield
Opt-in real-time monitoring that watches for malicious activity across your browsing session and alerts you the moment a threat is found.
Forensic Collection
When you report an incident, Vigil packages a forensic snapshot of your browser environment, suspicious hashes, and network IOCs, then opens a case with our analysts.
Vigil × Angel AI — Smarter Together
Vigil is Angel AI's sensor arm. When Angel identifies a potential threat during your consultation, it can trigger Vigil's scanner automatically. Results flow back to Angel AI in real time — no copy-paste, no manual steps.
Angel offers a scan
During your chat session
One click
In the chat — no new tabs
Vigil scans
In seconds, on your device
Auto-delivered
Results go straight to Angel AI
Something feels wrong. Hit the button.
The Panic Button is the only emergency response button built directly into your browser. One click opens a live chat panel over your current page. No new tabs, no forms, no hold music. Our incident response team joins immediately.
Zero-Persistence Protocol
What "B-05" means in plain language: your browsing activity never leaves your device passively. No URL is logged. No history is transmitted. No profile is built. The extension reads only what you explicitly ask it to scan.
“We don't log your history. We don't sell your data. The only thing that leaves your device is an evidence bundle, and only when you choose to report.”
Frequently Asked
Your questions, answered.
Does Vigil read my browsing history?
What does "Zero Logging" actually mean?
Will it slow my browser down?
What happens when I press the Panic Button?
Is this compatible with corporate / managed Chrome profiles?
Is the extension open source?
Does Vigil work with Angel AI?
Ready in 30 seconds. Protected 24/7.
No account. No configuration. Just install and go.
Install
Add to your browser
Pin
Keep it in your toolbar
Scan
Run your first check
Advanced Browser Security Built for the Modern Threat Landscape
The modern attack surface lives inside your browser. From drive-by malware to credential-harvesting phishing pages that pass basic domain checks, desktop antivirus cannot see what your browser sees. The 911Cyber Vigil browser extension was built from the ground up to operate at the layer where threats actually land.
Vigil applies heuristic analysis to three attack vectors simultaneously: your local browser environment (system scan), any URL you wish to verify, and any site you are currently visiting. Its lightweight, MV3-compliant architecture means zero latency impact and full forward compatibility with Chrome’s extension roadmap. Every URL scan is backed by VirusTotal AI — 95+ security engines working in concert to surface threats that heuristics alone might miss.
Unlike bloated security suites, Vigil is a precision tool. It collects no passive browsing data, stores nothing on our servers, and performs all analysis locally or via our dedicated scan proxy. When you choose to escalate, either by pressing the Panic Button or submitting a forensic report, that is the only moment data leaves your device, encrypted end-to-end.
Don't wait for the breach.
Install Vigil in 30 seconds, or speak with our team if you think something is already wrong.