Firefox Relay review
Updated October 13, 2026 · ShieldCue Editorial Team
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Our verdict
Firefox Relay is a secure email masking service known for stand-in addresses that forward mail to a personal inbox. It serves people who want extension, dashboard and mobile management with custom domain control and open source code, and buyers can check device fit before choosing this approach.
Key facts
- Best for
- Firefox Relay masked email for everyday inbox control
- Free plan limits
- 5 email masks (Source, checked September 26, 2026)
- Jurisdiction
- US (Source, checked September 26, 2026)
- Custom domains
- Yes (Source, checked September 26, 2026)
- Open source
- Yes (Source, checked September 26, 2026)
- Legal entity
- Mozilla Corporation (Source, checked September 26, 2026)
- Headquarters
- United States (Source, checked September 26, 2026)
- Support channels
- Help-centre, Community (Source, checked September 26, 2026)
- Pricing model
- Free
- Official website
- firefox.com
Privacy tools
- Free plan
- Yes (Source, checked September 26, 2026)
- Free plan limits
- 5 email masks (Source, checked September 26, 2026)
- Platforms
- Browser extension, Web dashboard, Mobile apps (Source, checked September 26, 2026)
- Logging policy
- Email content is not read or stored beyond delivery and is deleted within 3 days if undeliverable; IP address kept in server logs for 90 days; Twilio deletes text message records after 7 days; call content is not monitored or stored; interaction data can be opted out with Do Not Track. (Source, checked September 26, 2026)
- Jurisdiction
- US (Source, checked September 26, 2026)
- Open source
- Yes (Source, checked September 26, 2026)
- Legal entity
- Mozilla Corporation (Source, checked September 26, 2026)
- Headquarters
- United States (Source, checked September 26, 2026)
- Support channels
- Help-centre, Community (Source, checked September 26, 2026)
- Pricing model
- Free
Apps and profiles
- Elsewhere
- WikidataWikipediaXgithub.comLinkedIn
Pros
Pros
- Covers mail through an extension, a dashboard, and mobile apps.
- Supports custom domains for masks and publishes open source code.
Who it suits
- People wanting masked addresses with domain control
- Shoppers wanting extension, dashboard and mobile access
How Firefox Relay compares
Where Firefox Relay is available
- Available
- Austria, Belgium, Bulgaria, Canada, Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malaysia, Malta, Netherlands, New Zealand, Poland, Portugal, Romania, Singapore, Slovakia, Slovenia, Spain, Sweden, Switzerland, United Kingdom, United States
Countries from the brand (Source, checked September 26, 2026)
Frequently asked questions
What does Firefox Relay provide?+
Firefox Relay provides email masks that forward mail to a personal address while keeping the underlying address separate. Masks support management through extension, dashboard and mobile access. Custom domains allow organization under owned naming.
Which tools work with Firefox Relay masks?+
Firefox Relay masks work with a browser extension, a web dashboard and mobile apps. Each option manages creation and handling of masks for everyday use. Buyers can check device fit before choosing this approach.
What customization and transparency does it offer?+
Firefox Relay supports custom domains for masks that help organize addresses under owned naming. The service maintains open source availability for transparency. Buyers can review the approach and check fit before choosing masks.
Which company operates Firefox Relay?+
Firefox Relay is operated by Mozilla Corporation. (Source, checked September 26, 2026)
Where is Firefox Relay based?+
Firefox Relay is based in United States. (Source, checked September 26, 2026)
How can I contact Firefox Relay support?+
Firefox Relay offers support through Help-centre, Community. (Source, checked September 26, 2026)
Sources
- relay.firefox.com checked September 26, 2026
Backs: Free plan limits, Pricing model
“Everyone gets 5 email masks for free.”
- relay.firefox.com/faq checked September 26, 2026
Backs: Platforms, Support channels
“Yes, you can generate Relay masks on other browsers or mobile devices simply by logging in to your Relay dashboard.”
- mozilla.org/about/legal/terms/subscription-services checked September 26, 2026
Backs: Custom domains, Free plan, Headquarters, Jurisdiction, Legal entity, Open source
“With the paid subscription, you can create one phone number mask, an unlimited number of email masks, and you have the option to create a custom subdomain for your email masks.”
- mozilla.org/privacy/subscription-services checked September 26, 2026
Backs: Logging policy
“We do not read or store the content of any of your messages... your IP address is temporarily collected as part of our server logs for 90 days... Mozilla has set the Twilio service to delete its...”
Compiled from 4 source pages, checked October 13, 2026. We did not open an account.
Not confirmed yet: Price from, End-to-end encryption.