The Firefox Relay Insider’s Guide
Everything we know about Firefox Relay in one document: what it costs, its grades, getting a refund, getting help and what else to look at. Read it here, or keep a copy.
Firefox Relay
The Insider’s Guide
Email and phone masks that forward to your real inbox
Every plan, grade, refund rule and rival among email apps, read from Firefox Relay’s own pages.
Made by Mozilla · checked Nov 12, 2026 · toolgpa.com
Contents
- 01WelcomeWhat it is, who it suits, its grades and the ten things to know first
- 02What it costsEvery plan, the free plan, ways to pay less and how prices have moved
- 03What it doesIts main features, where it runs, what it works with and who makes it
- 04Where it standsIts grades against its category, and whether to keep it or make your own
- 05The alternativesThe tools it is most often weighed against, side by side
- 06Quick answersThe questions people ask about it, each answered in a line or two
- 07About ToolGPAWho made this guide, what else is on the site, and how to cite it
ToolGPA put this guide together from Firefox Relay’s own pages, its app-store listings and our grades. Every fact in it is on Firefox Relay’s page too, where it is kept up to date. Checked Nov 12, 2026.
Part 01 · Overview
Welcome
What it is, who it suits, its grades and the ten things to know first
2.2
GPA, above 12 of the 70 other email apps we grade
Firefox Relay gives you masked email addresses that forward to your true inbox, so you can sign up for sites without sharing it. A free account gets five masks. Mozilla's paid Relay Premium plans, which add unlimited masks and replies, are currently listed as a waitlist.
To get you started, here are 8 things to know about Firefox Relay, taken from its own pages and our grades.
Mozilla itself advises against masks for banks, doctors and lawyers.
- 1
Best for email masks from Mozilla
It can't reply from a mask, and the Premium plan shows no price and a waitlist button.
- 2
There is a free plan
5 email masks, the browser extension and removal of email trackers from forwarded mail.
- 3
It runs on Web
Web, with a browser extension too.
- 4
Email masks
Each mask forwards to your true address, and you can turn forwarding off for one mask without touching the rest.
- 5
Browser extension
An add-on creates a mask on a site's sign-up form. The homepage links the Firefox add-on, and masks can be made from the dashboard in other browsers.
- 6
Tracker removal
Common email trackers are stripped from forwarded mail, and this is included on the free plan.
- 7
A 2.2 GPA, above 12 of 70
That is against the other email apps we grade, on value, the free plan, features, ease of use and platforms.
- 8
Keep it
The plain part of Firefox Relay you could make: ad and tracker blocking. What surrounds it you could not. The 1 things listed below take a company, not a weekend.
Firefox Relay at a glance
- Pricing
- Free plan
- Free plan
- Yes
- Free trial
- None stated
- Runs on
- Web, Browser extension
- Made by
- Mozilla
- Category
- Email Apps
- Our grade
- 2.2 GPA, fair
The report card
Best for email masks from Mozilla
Firefox Relay hides your real address behind masks that forward to your inbox, and the free plan covers 5 masks with a browser extension. It can't reply from a mask, and the Premium plan shows no price and a waitlist button. Mozilla itself advises against masks for banks, doctors and lawyers.
| Subject | Grade | Comment |
|---|---|---|
| Value for money | C | The free plan is the only plan you can sign up for. Premium shows no price and a Join the Waitlist button, so there's no price on record. |
| Free plan and trial | C | Free for 5 email masks, the extension and tracker removal. Five masks is a cap you'll hit, and the free plan can't reply from a mask. |
| Features | C | Email masks, a browser extension and tracker removal. Gaps: replies and promo blocking sit on Premium, and phone masking has no price shown. |
| Ease of use | B | No store rating on record. You install the extension and click to make a mask, with nothing else to set up. |
| Platforms and integrations | C | Web and a browser extension only, with no phone app, desktop app or integrations listed. |
An A is worth 4 points, a B 3, a C 2, a D 1 and an F nothing. The GPA is the average of the five.
Who Firefox Relay is for
- Fits if you want a throwaway address for a few sign-ups
- Works for people who already use Firefox and want masks built into it
Who it is not for
- Tight if you want more than 5 masks, as Premium shows no price and is waitlist only
- Not for you if you need to reply from a mask, as the free plan can't
- Watch out: Mozilla advises against masks for banks, doctors, lawyers and mail with attachments you must receive
- Watch out: Relay Premium is limited to listed countries, including the US, Canada, the UK and most of the EU
Good to know
Good for
- People who want a few throwaway addresses for newsletters and sign-ups
- Firefox users who want masks created from inside the browser
Worth knowing
- Premium and phone plans show no price and a Join the Waitlist button, so only the free plan can be signed up for.
- The free plan stops at 5 masks and cannot reply from a mask; masks go to your existing inbox.
- Mozilla advises against masks for banks, doctors, lawyers and mail with attachments you must receive.
- Relay Premium is limited to listed countries, including the US, Canada, the UK and most of the EU.
Part 02 · Pricing
What it costs
Every plan, the free plan, ways to pay less and how prices have moved
2
plans to choose from
Firefox Relay has a free plan.
The free plan is the only plan you can sign up for.
Limited email protection
$0
5 email masks, the browser extension and removal of email trackers.
Relay Premium
Custom
Unlimited masks, a custom mask domain, replies and promo blocking; no price shown, waitlist only.
The free plan
5 email masks, the browser extension and removal of email trackers from forwarded mail.
Read from relay.firefox.com on Nov 12, 2026.
Part 03 · Features
What it does
Its main features, where it runs, what it works with and who makes it
2
Places it runs: Web and Browser extension
Email and phone masks that forward to your real inbox. Here is what it does, as its own site describes it, and what it covers: inbox filtering, ad and tracker blocking.
Email masks, a browser extension and tracker removal.
- Email masks
- Each mask forwards to your true address, and you can turn forwarding off for one mask without touching the rest.
- Browser extension
- An add-on creates a mask on a site's sign-up form. The homepage links the Firefox add-on, and masks can be made from the dashboard in other browsers.
- Tracker removal
- Common email trackers are stripped from forwarded mail, and this is included on the free plan.
- Promo blocking
- Premium can block promotional mail while still forwarding receipts and shipping notices. Blocking is not exact, so important mail can occasionally be caught.
- Anonymous replies
- Premium lets you reply to a forwarded email within 3 months of receiving it, and gives a custom mozmail.com mask domain.
- Phone masking
- A phone mask forwards calls and texts to your number and lets you reply to texts. The phone plan is a waitlist.
Where it runs
- Web
- Browser extension
What it works with
Its own pages name no integrations.
Firefox Relay is made by Mozilla.
Part 04 · Standing
Where it stands
Its grades against its category, and whether to keep it or make your own
12/70
Other email apps it is graded above
Firefox Relay's GPA of 2.2 is higher than 12 of the 70 other email apps we grade, and level with 13.
It stands best on ease of use (B, above 50 of 70) and worst on features (C, above 0).
Each grade against the category
Every bar is all 71 email apps we grade, cut by the letter each got. Firefox Relay’s own letter is outlined.
- CValue for moneyAbove 12 of 70
- CFree plan and trialAbove 4 of 70
- CFeaturesAbove 0 of 70
- BEase of useAbove 50 of 70
- CPlatforms and integrationsAbove 5 of 70
Keep it, or make your own?
Whether this is something you could build for yourself with an AI app builder, and what you would give up.
Keep it
The plain part of Firefox Relay you could make: ad and tracker blocking. What surrounds it you could not. The 1 things listed below take a company, not a weekend.
That makes this kind of software worth paying for, not this one in particular: 45 of the 70 other email apps grade higher.
What you could make
- Ad and tracker blocking: an app builder makes this well.
What you could not
- Filters that read every message as it arrives.
What this rests on. Firefox Relay’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
Part 05 · Alternatives
The alternatives
The tools it is most often weighed against, side by side
SimpleLogin, addy.io, ImprovMX and Proton Mail
The 4 tools Firefox Relay is most often weighed against, with where each one differs from it.
- 2.4GPA
SimpleLogin
Free plan · from $36/yr
Open-source email aliases that forward to your own inbox.
- Only SimpleLogin lists iOS and Android apps.
- SimpleLogin is open source and self-hostable, according to its own site.
- Firefox Relay also covers inbox filtering and ad and tracker blocking.
- 2.6GPA
addy.io
Free plan · from $1/mo
Email alias forwarding that hides your real address from sites.
- Only addy.io lists iOS and Android apps.
- addy.io is open source and self-hostable, according to its own site.
- Firefox Relay also covers inbox filtering and ad and tracker blocking.
- 2.4GPA
ImprovMX
Free plan · from $50/yr
Email forwarding and sending for custom domains.
- Only Firefox Relay lists a browser extension.
- Firefox Relay also covers ad and tracker blocking.
- ImprovMX also covers transactional email.
- 3.0GPA
Proton Mail
Free plan · from $3.99/mo
End-to-end encrypted email service based in Switzerland.
- Only Firefox Relay lists a browser extension.
- Only Proton Mail lists macOS, Windows, Linux, iOS and Android apps.
- Proton Mail is open source and end-to-end encrypted, according to its own site.
Part 06 · Questions
Quick answers
The questions people ask about it, each answered in a line or two
10
Questions, each answered in a line or two
The short version of everything above, for when you only need the answer. Each one is told in full in its part of the guide.
Is Firefox Relay free?
Firefox Relay has a free plan. 5 email masks, the browser extension and removal of email trackers from forwarded mail.
How much does Firefox Relay cost?
Firefox Relay lists 2 plans. Limited email protection: $0.
What platforms does Firefox Relay work on?
Firefox Relay is available on Web. It also has a browser extension.
Does Firefox Relay have an Android app?
No Android app was listed when its pages were read on Nov 12, 2026. Firefox Relay is listed for Web.
Does Firefox Relay have an iPhone app?
No iPhone app was listed when its pages were read on Nov 12, 2026. Firefox Relay is listed for Web.
Is Firefox Relay open source?
Firefox Relay is not described as open source on its own site, as read on Nov 12, 2026.
Who makes Firefox Relay?
Firefox Relay is made by Mozilla.
What are the alternatives to Firefox Relay?
The closest alternatives to Firefox Relay in our directory are SimpleLogin, addy.io, ImprovMX and Proton Mail.
How does Firefox Relay compare with other email apps?
Firefox Relay's GPA of 2.2 is higher than 12 of the 70 other email apps we grade, and level with 13.
Could I make my own version of Firefox Relay?
The plain part of Firefox Relay you could make: ad and tracker blocking.
Where this guide comes from
The prices, plans, platforms and features were read from Firefox Relay’s own pages on Nov 12, 2026, and the grades were given on Nov 12, 2026. Graded from this listing, whose facts were read from Firefox Relay's own pages on 12 November 2026. Not based on using the product, and shorter than our full reviews.
Every tool we list gets five grades, A to F, each with its reason, and a GPA that averages them. How each is decided is at toolgpa.com/grades. This guide is ToolGPA’s own work; it is not made, paid for or approved by Mozilla. Prices change, so check relay.firefox.com before you buy.
Part 07 · About
About ToolGPA
Who made this guide, what else is on the site, and how to cite it
5,038
Tools graded, in 95 categories
ToolGPA grades software the way a school report grades a pupil: five subjects, a letter for each with the reason written beside it, and a GPA that averages them. Prices, plans and platforms are read from each maker’s own pages and dated, so you always know how fresh a figure is.
Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Every tool on the site has a guide like this one, free to download and pass on. It all lives at toolgpa.com.
5,038
tools graded
95
categories
739
price changes on record
579
apps priced in 12 countries
What else is on toolgpa.com
- Firefox Relay, kept up to dateEverything in this guide, with prices and grades as they are todaytoolgpa.com/tools/firefox-relay
- How grades are givenThe rules behind every letter and every GPAtoolgpa.com/grades
- Value chartsWhat each tool costs against what it scores, for every categorytoolgpa.com/charts
- CompareAny two tools side by side, plan by plantoolgpa.com/compare
- Price changesEvery price rise and cut on record, each with its sourcetoolgpa.com/price-changes
- Prices by countryWhat apps cost on the App Store in 12 countriestoolgpa.com/prices-by-country
- Pay lessEvery public discount: yearly billing, students, nonprofitstoolgpa.com/save
- Keep or makeWhich tools are worth paying for, and which you could build yourselftoolgpa.com/keep-or-make
Scan for the live page
Prices and grades as they are today
Quoting this guide?
Please name ToolGPA and link to the live page, so readers can check the figures for themselves:
ToolGPA, "Firefox Relay: The Insider's Guide", checked Nov 12, 2026. https://toolgpa.com/tools/firefox-relay
Know someone choosing between email apps?
Send them this guide: toolgpa.com/tools/firefox-relay/guide
ToolGPA elsewhere: youtube.com/@toolgpa
See our other guides
The best-graded email apps after Firefox Relay, each with an Insider's Guide of its own.
- Email Apps Insider's GuideEvery one of the 74 email apps we grade, compared
- Microsoft Outlook Insider's GuideMicrosoft's email and calendar app for desktop, mobile and web3.6 GPA
- BlueMail Insider's GuideCross-platform email client with a unified inbox and built-in AI3.2 GPA
- GMX Mail Insider's GuideFree webmail with 65GB storage, aliases and a mail collector3.2 GPA
Choosing software? Every tool graded, every price dated.
Compare tools at toolgpa.com ›Everything in this guide is ToolGPA’s own summary of what Firefox Relay’s pages, its app-store listings and public reviews said on the dates shown. Grades are our judgement under the rules at toolgpa.com/grades. Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Firefox Relay is a trademark of its owner, and this guide is not made, paid for or approved by Mozilla. Prices and plans change: check relay.firefox.com before you buy.