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Firefox Relay vs Forward Email: catalog facts
Firefox Relay	Forward Email
Freemium Free tier with a limited number of masks, paid plan for unlimited masks and a custom…	Freemium Free tier available for custom domain forwarding, open source.
Web, Browser extension	Web
Backed by Mozilla, a long-standing name in browser privacy Simple mask creation directly from the browser	Unlimited aliases and generous free storage for custom domain forwarding Fully open source rather than a closed proprietary forwarder
Free tier limits the number of masks available Deeper integration is tied to the Firefox browser ecosystem	Requires owning and configuring a custom domain to get the full benefit Advanced use cases may require comfort with DNS configuration
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.