Canary Trap by Leshya Bracaglia
Auto-suggests a unique per-site email alias (you+company@gmail.com) so you can tell which companies leak or sell your address.
Available on Firefox for Android™Available on Firefox for Android™
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About this extension
CanaryTrap gives every website you sign up for its own unique, trackable email alias (yourname+sitename@gmail.com) so if your inbox starts getting spam, you can trace it back to exactly which company leaked, sold, or got breached with your address.
How it works:
• Focus any email field on any site and CanaryTrap suggests a per-site alias built from your base email.
• Choose "Show fill button" to confirm before filling, or "Auto-fill silently" to skip the prompt.
• Right-click an email field to copy the alias to your clipboard instead of filling it.
• The popup keeps a log of every site you've used an alias on, with use counts and last-used dates, so you can see at a glance which one is leaking.
• Export your full alias log to CSV anytime.
Privacy first: CanaryTrap runs entirely in your browser. Your alias log never leaves your device: no analytics, no third-party servers, no outbound requests.
How it works:
• Focus any email field on any site and CanaryTrap suggests a per-site alias built from your base email.
• Choose "Show fill button" to confirm before filling, or "Auto-fill silently" to skip the prompt.
• Right-click an email field to copy the alias to your clipboard instead of filling it.
• The popup keeps a log of every site you've used an alias on, with use counts and last-used dates, so you can see at a glance which one is leaking.
• Export your full alias log to CSV anytime.
Privacy first: CanaryTrap runs entirely in your browser. Your alias log never leaves your device: no analytics, no third-party servers, no outbound requests.
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Permissions and data
Required permissions:
- Input data to the clipboard
- Download files and read and modify the browser’s download history
- Access your data for all websites
Optional permissions:
- Access your data for all websites
Required data collection, according to the developer:
- Browsing activity
- Personally identifying information
More information
- Add-on Links
- Version
- 1.0.0
- Size
- 33.5 KB
- Last updated
- 5 days ago (Aug 23, 2026)
- Related Categories
- License
- MIT License
- Privacy Policy
- Read the privacy policy for this add-on
- Version History
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