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Firefox Relay vs DuckDuckGo Email Protection: catalog facts
Firefox Relay	DuckDuckGo Email Protection
Freemium Free tier with a limited number of masks, paid plan for unlimited masks and a custom…	Free Free Duck Address provided by DuckDuckGo.
Web, Browser extension	Web, Browser extension
Backed by Mozilla, a long-standing name in browser privacy Simple mask creation directly from the browser	Keeps your existing inbox and email provider Removes trackers from forwarded emails
Free tier limits the number of masks available Deeper integration is tied to the Firefox browser ecosystem	Relies on DuckDuckGo to forward all mail Little detail on features in the fetched page
Web application, Browser extension	Hosted service, Browser extension
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.