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Firefox Relay vs Erine.email: catalog facts
Firefox Relay	Erine.email
Freemium Free tier with a limited number of masks, paid plan for unlimited masks and a custom…	Free Free and open source.
Web, Browser extension	Web
Backed by Mozilla, a long-standing name in browser privacy Simple mask creation directly from the browser	Free and open source alternative to paid alias services Works with an existing inbox rather than requiring a new mailbox
Free tier limits the number of masks available Deeper integration is tied to the Firefox browser ecosystem	Smaller, less established project than larger alias services Limited information available on feature depth and reliability track record
Web application, Browser extension	Web application
Closed source	Open source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

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