STAY SAFE FROM PHISHING ATTACKS
Mailstrong adds a crucial security layer to your Gmail inbox. Before any external link opens, you'll see a detailed confirmation modal with security information, giving you time to verify the destination and make informed decisions.
- Automatically detects and intercepts all external links in Gmail emails
- Shows a clear confirmation modal before opening any link
- Prevents accidental clicks on phishing or malicious links
- Displays full URL and domain name prominently
- Highlights HTTPS vs HTTP security status
- Warns about suspicious patterns (IP addresses, unusual characters, very long URLs)
- Helps you spot phishing attempts before it's too late
- Open Link - Proceed to the destination in a new tab
- Cancel - Close modal without opening the link
- Copy URL - Copy the link to clipboard for verification in security tools
- Whitelist - Add trusted domains to skip future confirmations
- Review the last 50 intercepted links
- See what you opened vs cancelled
- Track timestamps and security status
- Useful for security audits and incident review
- Track total links intercepted
- See how many suspicious links you've blocked
- Monitor HTTP vs HTTPS ratio
- Identify most common domains
- Quantify your security improvements
- Whitelist trusted domains to skip confirmations
- Toggle history and statistics tracking
- Enable/disable the extension with one click
- All settings sync across your Chrome browsers
- 100% local processing - no data sent to external servers
- No tracking or telemetry
- No personal information collected
- All data stored locally on your device
- Open source code available for review
- Professionals handling sensitive information
- Anyone who receives emails from unknown senders
- Security-conscious individuals
- Corporate users needing audit trails
- People who want to understand their email threat landscape
- Install the extension
- Open Gmail as usual
- When you click an external link, a modal appears
- Review the URL and security information
- Choose to open, cancel, or whitelist the domain
- Track your activity in the Statistics and History tabs
- Minimal performance impact
- No Gmail slowdown
- Instant modal display (<100ms)
- Small memory footprint
- Specifically designed for Gmail's web interface (mail.google.com). Works seamlessly with Gmail's dynamic content loading.
- Domain reputation checks
- Enhanced threat detection
- Export statistics reports
- And more based on your feedback!
Manual installation is required until the extension is published in the Chrome Web Store
- Download the project zip file
- Unzip the file
- In Chrome, go to
chrome://extensions/ - Click the "Load unpacked" button (top left)
- Navigate to the unzipped directory
- Click the "Select" button
- The extension is installed. Activate if not already switched on.
- Go to
mail.google.comand give it a try
Need help? Have suggestions? Submit an issue in the Github repo: https://github.com/calebsylvest/mailstrong
Stay safe online! 🛡️