Firefox for iOS now includes built-in email masking powered by Firefox Relay. You can hide your real email address when signing up on websites you don’t fully trust by using a generated mask. Email masking helps protect your identity and inbox from spam or tracking.
Previously, this feature was only available through an extension. Now, it’s built into Firefox for iOS. In this initial phase, it is available to users who are signed in to Firefox with a Mozilla account that already has Firefox Relay enabled.
If you have not used Relay before, sign in to Firefox on iOS from , then visit relay.firefox.com relay.firefox.com and sign in with the same Mozilla account to activate Relay. Once enabled, you can use email masking directly in the browser.
Table of Contents
Enable email masking suggestions on your iOS device
- Tap the menu icon (three lines) in Firefox.
- Tap .
- Go to .
- Select .
- Toggle to turn the feature on.
Use email masking when signing up
After enabling the feature, Firefox will suggest using an email mask whenever you tap an email field on a sign‑up form.
- Tap the email field on a website’s sign‑up form.
- Select Use email mask from the suggestion.
- Firefox will insert a unique masked email address to keep your real email hidden.
Frequently related questions
Who can use email masking in Firefox for iOS?
In the initial phase, email masking is available to users who are signed in to Firefox for iOS with a Mozilla account that already has Firefox Relay enabled. Make sure you are using Firefox for iOS version 150 or later and are signed in to your account to access this feature.
How many email masks do I get for free?
You can use up to five free email masks. If you reach the limit, Firefox automatically selects one of your existing masks for you and shows a message to let you know. You can manage your masks at any time by going to > > .
Can I delete or edit my email masks?
Yes. To manage or delete your existing masks, go to Settings > Email masks, then select Manage email masks. This opens your Firefox Relay dashboard in a new tab, where you can view and manage your masks.
Is a Mozilla account required?
Yes, you need to be signed in with a Mozilla account to use email masking.
Does it work in private browsing?
Yes, email masking works in private browsing mode.
Why don’t I see the suggestion to use a mask?
Make sure the Suggest email masks setting is enabled. Email masking is only available on supported websites. Firefox checks an approved list of domains before showing the mask option, so if a website is not on that list, the option will not appear. Some custom or non-standard sign-up fields may also not be recognized.