Mustvedt Sentinel for your browser protects you from phishing, malicious links, and leaked passwords — right as you browse. Completely free. No account required.
Active protection on every site, without getting in your way.
Hover over a link for 0.6 seconds. A small popup shows whether it’s safe, suspicious, or dangerous — before you click.
Phishing and malware pages are caught by Google Safe Browsing + URLhaus + our own heuristics. We stop you before the page even loads.
When you type into a password field, we check it against 12 billion leaked passwords. With k-anonymity — we never see your password.
Right-click on a link or page → “Scan with Mustvedt Sentinel”. Get an instant verdict without leaving the page.
Mark your bank, work systems, or other sites you trust 100%. They’re skipped by scans and auto-block. Subdomains included.
The Mustvedt icon shows a green, yellow, or red dot based on the safety of the page you’re on. Visual protection at all times.
Specialized detection of look-alike domains. Currently optimized for Norwegian institutions (DNB, Posten, Skatteetaten, Vipps, NAV) — international brands rolling out next.
24-hour cache. No noticeable lag on page load. Uses only ~5 MB of memory.
We only send the URL — never page content. No tracking. No third-party cookies. You can turn off all network calls.
While we wait for Chrome Web Store approval, the extension is installed manually. Takes 60 seconds.
Click “Download ZIP” above. Unzip the file — you’ll get a folder called extension.
Go to chrome://extensions in Chrome (or edge://extensions / brave://extensions). Toggle Developer mode in the top right.
Click Load unpacked and select the extension folder. The Mustvedt Sentinel icon appears in your toolbar — you’re protected.
We’re awaiting review. You’ll get automatic updates as soon as we’re live.
Read the full extension privacy policy → (Norwegian for now)