Firefox Relay
Email and phone masks that forward messages and keep your real identity private
Own Firefox Relay? Claim it, free to correct the facts and get the verified badge.
Pricing
Free · from $0.99/mo
Open source
Yes
Company
Mozilla
Platforms
What is Firefox Relay?
Firefox Relay is Mozilla's email and phone masking service. You give websites, apps and stores a random masked address or phone number instead of your real one. Relay forwards the emails, calls and texts to you, and senders never see your real contact details.
You manage everything from a Relay dashboard, where you can create masks, label them, and block a mask once it starts getting spam. A browser extension lets you create masks on any site. Relay can also strip common email trackers from forwarded messages. The free tier includes 5 email masks.
The Premium tiers add unlimited masks, a personal mozmail.com subdomain for making masks on the go, anonymous replies, and promotional email blocking. Higher tiers add a masked phone number or bundle Mozilla VPN. Relay suits privacy-minded people who want to cut spam and limit the damage from data breaches.
Key features
- Random email masks that forward to your real inbox
- Masked phone number that forwards calls and texts
- Removal of email trackers from forwarded mail
- Blocking of promotional emails while keeping receipts
- Personal mozmail.com subdomain for instant masks
- Anonymous replies to emails and texts
- Dashboard to label, create and block masks
- Browser extension for creating masks on any site
Use cases
Who it's for
Signing up for newsletters
Use a mask for marketing sign-ups, then block it if the emails become unwanted.
Avoiding spam texts
Give stores or restaurants a masked phone number instead of your real one.
Limiting breach exposure
Use separate masks per account so a leaked address doesn't expose your real inbox.
Creating masks on the go
Premium users can make up an address like shop@yourdomain.mozmail.com on the spot.
Firefox Relay pricing
From the vendor's site, checked Nov 8, 2026. Prices change — confirm on their pricing page.
| Plan | Limited email protection | Email protection | Email & phone protection | Add VPN protection |
|---|---|---|---|---|
| Paid monthly | Free | $1.99/mo | $4.99/mo | yearly only |
| Paid yearly | Free | $0.99/mo−50% | $3.99/mo−20% | $6.99/mo |
| Email masks | 50 | Unlimited | Unlimited | Unlimited |
| Phone mask | — | — | Yes | Yes |
| Reply anonymously | — | Yes | Yes | Yes |
| Also |
|
| — |
|
Which plan do you need?
- Guerrilla MailCustom domain$0.83/mo
- Firefox RelayEmail protection$0.99/mo
- Addy.ioLite$1/mo
- SimpleLoginPremium$3/mo
The cheapest paid plan with a published price that fits. Custom and sales-quoted plans aren't included.
Get an email when Firefox Relay changes its prices
One mail per change, a stop link in each. Nothing else.
Firefox Relay in numbers
- Free aliases
- 5
- Cheapest paid plan
- $1.99
- Aliases on paid plan
- Unlimited
- Phone numbers
- 1
- Number countries
- US, CA, PR
- Custom domains
- No
- Reply from alias
- Yes
- Open source
- Yes
- Apps & extensions
- Firefox, Chrome, web
The $1.99 entry price is billed monthly ($0.99/mo on yearly billing); the phone plan is $4.99 monthly or $3.99/mo yearly, and Premium custom addresses use a mozmail.com subdomain rather than your own domain. From Firefox Relay's own pages, checked Nov 8, 2026. Each figure links to the page it is from; fields the vendor doesn't state are left out.
How Firefox Relay compares
- Firefox Relay has the best phone numbers of the 3 services here: 1.
| Tool | Free aliases | Cheapest paid plan | Phone numbers | Reply from alias | Custom domains | |
|---|---|---|---|---|---|---|
| FFirefox Relay | 5 | $1.99 | 1 | Yes | No | |
S SimpleLogin | 10 | $4 | 0 | Yes | Yes | Firefox Relay vs SimpleLogin |
A Addy.io | Unlimited standard + 10 shared domain | $1 | 0 | Yes | Yes | Firefox Relay vs Addy.io |
T Temp-Mail | — | — | — | — | Yes | Firefox Relay vs Temp-Mail |
G Guerrilla Mail | — | — | — | — | Yes | Firefox Relay vs Guerrilla Mail |
Figures from each vendor's own pages; — means the vendor doesn't state it. The closest alternatives in our directory by category. “Starts at” is the cheapest paid plan per month, as each vendor lists it.
Pros and cons
Strengths
- Free tier includes 5 email masks and tracker removal
- Source code is public on GitHub
- Combines email and phone masking in one service
- Browser extension rated 4.1/5 from over 1,250 reviews
Limitations
- Free plan is limited to 5 email masks
- Premium tiers are waitlist-only
- Premium is available only in certain countries
- Not recommended for identity-verified emails or ones that need attachments
Firefox Relay FAQ
Is Firefox Relay free?
Yes. The free plan includes 5 email masks, the browser extension and email tracker removal. Premium tiers are currently waitlist-only.
Where is Relay available?
Free Relay is available in most countries. Premium is available in the US, Canada, the UK, much of the EU, Switzerland, Malaysia, Singapore and New Zealand.
What is an email mask?
A private address that forwards messages to your real email, so third parties never see your true address.
Can I use Relay outside Firefox or on mobile?
Yes. You can create masks on other browsers or mobile devices by logging in to the Relay dashboard.
When should I not use a mask?
Mozilla recommends using your real address for banks, doctors, lawyers, boarding passes, and emails that carry attachments.
Used Firefox Relay? Rate it
Sign in to rate this tool and share how you use it.
Firefox Relay
Free · from $0.99/mo
Tools similar to Firefox Relay
Free disposable email address that expires after 10 minutes, no signup