Review · Software & AI
Firefox Relay review
Mozilla's email masking service with 5 free masks and a Premium plan with unlimited masks and phone masking.
By the Comredix review desk · Updated November 14, 2026
- Quality (40%)
- 8.2
- Experience (25%)
- 9.0
- Value (35%)
- 8.6
Firefox Relay is Mozilla's email masking service and works through a browser extension that fills a mask into any sign-up form. Everyone gets 5 masks for free, and common email trackers are removed on every plan. Relay Premium adds unlimited masks, a unique subdomain on mozmail.com so you can make masks on the go, such as shop@yourdomain.mozmail.com, promotional email blocking that still lets receipts and shipping updates through, and the ability to reply anonymously within 3 months of receiving an email. A higher tier adds a phone mask for calls and texts, and another bundles Mozilla VPN. Attachments are forwarded up to 10 MB. Mozilla's own FAQ advises against using masks for banks, doctors, lawyers or boarding passes. Premium is sold in a listed set of countries including the United States, Canada and the United Kingdom; its price did not display in USD when we checked, so it is marked pending.
Who it is for
Firefox users who need a few masks
Price
Free plan with 5 masks; Premium: see vendor pricing (USD check pending).
US price check pending. See the vendor pricing page.
Key features
- Everyone gets 5 email masks for free
- Removes common email trackers on free and paid plans
- Premium adds unlimited masks and a unique Relay email domain
- Premium adds promotional email blocking and anonymous replies
- Higher tier adds a phone mask, and a bundle adds Mozilla VPN
Strengths and weaknesses
- Strength: Browser extension to use Relay on any site
- Strength: Attachment forwarding up to 10 MB
- Strength: Promotional email blocking still lets receipts and shipping updates through
- Weakness: Free plan stops at 5 masks
- Weakness: Replies are Premium only and limited to 3 months after an email arrives
- Weakness: Premium is only sold in a listed set of countries
Key facts
- Free plan: Yes, 5 email masks
- Premium extras: Unlimited masks, custom subdomain, replies
- Attachment limit: 10 MB
- Mask domain: mozmail.com
Where it ranks
Firefox Relay is No. 5 in our Best Temporary Email Services verdict.
Alternatives we scored
Visit relay.firefox.com · Questions or corrections: editorial@comredix.com