Overview
Tech support scammers use browser APIs to make your computer appear frozen, then display fake virus warnings with phone numbers to call. These attacks target elderly and non-technical users who don't know how to escape.
ScamShield stops these attacks automatically:
HOW IT WORKS
- Monitors five browser APIs that scammers abuse: fullscreen, pointer lock, keyboard lock, beforeunload traps, and history spam
- Detects scam patterns: multiple APIs fired in quick succession, or rapid repeated calls to the same API
- Blocks the attack instantly — no popups, no decisions, no configuration needed
- Shows a notification so you know you were protected
WHAT IT BLOCKS
- Fullscreen takeovers that hide browser controls
- Pointer lock that makes your mouse disappear
- Keyboard lock that traps Escape, Alt+Tab, and other exit keys
- Beforeunload traps that spam "are you sure you want to leave?" dialogs
- History spam that breaks your back button
- Combo attacks that use multiple techniques at once
PRIVACY
- No data collection whatsoever
- No analytics, no tracking, no ads
- All detection happens locally in your browser
- Open source: https://github.com/robbalian/scamblock
PERFECT FOR
- Installing on a parent's or grandparent's computer
- Anyone who wants protection from browser-based scams
- Security-conscious users who want defense in depth
Privacy policy: https://scamblock.vercel.app/privacy.html
## Screenshots needed
1. Popup showing blocked events log
2. Notification when a scam is blocked
3. Demo site showing the attack being blocked
4. Popup settings/allowlist view
Tags
Privacy Practices
🔐 Security Analysis
This extension hasn't been security-scanned yet.