Privacy and security

Learn how to protect your privacy and secure your data.

In English

Use built-in VPN in Firefox

Common Myths about Private Browsing

Avoid and report Mozilla tech support scams

Insecure connection password warning in Firefox

Private Browsing on Firefox for Android

Third-party trackers

Enhanced Tracking Protection in Firefox for desktop

Enhanced Tracking Protection in Firefox for Android

Does Firefox share my location with websites?

Configure DNS over HTTPS protection levels in Firefox

Sponsors on the home page and New Tab page

Firefox Terms of Use FAQ

Firefox Password Manager - Alerts for breached websites

Add Firefox Relay to the Firefox password manager

Global Privacy Control

How do I set up Sync on my computer?

Private Browsing - Use Firefox without saving history

Pop-up blocker settings, exceptions and troubleshooting

Use a Primary Password to protect stored logins and passwords

Delete browsing, search and download history on Firefox

How to manage your camera and microphone permissions with Firefox

Introducing Total Cookie Protection in Standard Mode

Firefox security features warning on Linux

HTTPS-Only Mode in Firefox

How do I turn on the Do Not Track feature?

Choose a strong password

How does built-in Phishing and Malware Protection work?

How to set up Firefox Sync in Firefox for Android

Trackers and scripts Firefox blocks in Enhanced Tracking Protection

Manage remote improvements settings in Firefox

Manage technical and interaction data collection settings in Firefox

Remote Content in Messages

HTTPS-Only Mode in Firefox for Android

Mobile - Manage Firefox data collection and privacy settings

Protect privacy while using Web Authentication

Secure website certificate

How do I tell if my connection to a website is secure?

Search suggestions in Firefox

Firefox connection upgrades - HTTP to HTTPS

Manage daily usage ping data collection settings in Firefox

Automatically fill in credit card and payment method data on Web forms

Resist Fingerprinting

How to use Firefox containers

SmartBlock for Enhanced Tracking Protection

Manage marketing data settings in Firefox for Android

Troubleshoot Firefox issues caused by malware

Why are some add-ons not allowed on sites restricted by Mozilla?

Configure DNS over HTTPS protection levels in Firefox for Android

Password Manager - Remember, delete and change passwords in Thunderbird

I found a fake Firefox update

Automatically trust third-party root certificates

Manage marketing data settings in Firefox for Desktop

Mixed content blocking in Firefox

How do I choose what information to sync on Firefox?

Introduction to End-to-end encryption in Thunderbird

OpenPGP in Thunderbird - HOWTO and FAQ

Mozilla VPN - FAQ

Clear cookies and website data for a single domain in Firefox for Android

Control personal device and local network permissions in Firefox

Manage Enhanced Tracking Protection exceptions

Clear your browsing history and other personal data on Firefox for Android

Change your Mozilla account password

How Firefox securely saves passwords

Firefox DNS over HTTPS

Multi-Hop - Encrypt your data twice for enhanced security while using Mozilla VPN

Share browser windows or your screen with sites you trust

Browsing history in Firefox - View the websites you have visited

Disable Firefox Sync

Is Mozilla VPN free?

How do I change my DNS settings?

Crash reports in Firefox for Desktop

Oblivious HTTP (OHTTP) explained

How to stop Firefox from making automatic connections

Enhanced Tracking Protection in Firefox for iOS

Mozilla service providers and partners

DNS over HTTPS (DoH) FAQs

Clear browsing history in Firefox for iOS

Activate Firefox Relay - Mask your email address

Microsoft OAuth Authentication and Thunderbird in 2024

Sign in to a Mozilla account using 3rd-party authentication

Instructions for obtaining a personal S/MIME certificate by creating a CSR

Clear your browsing history in Firefox for Android

Set up a passcode and Face ID in Firefox for iOS

Remove a synced device from your Mozilla account

Mozilla Monitor - Frequently asked questions

Autofill logins on Firefox

Protect your Thunderbird passwords with a Primary Password

Site Information panel

Add trusted websites to your allow list in Firefox Focus

How do I know the status of my sync?

Protect your container tabs with Mozilla VPN

Manage your logins with the Firefox Password Manager

Create an email mask through Firefox Relay

Recommended Firefox privacy and security settings for families

Thunderbird Mobile Telemetry

Why does Monitor show me in a data breach for a site I never signed up to?

Getting started with Thunderbird for Android

Certificate contains the same serial number as another certificate

Disable Firefox Sync on a lost phone or tablet

How does Firefox for Android use the permissions it requests?

About private browsing in Firefox for iOS

Total Cookie Protection and website breakage FAQ

Setup your email account for using End-To-End Encryption

Firefox privacy and security features

Disable password saving in Firefox

How does Firefox Focus for iOS use the permissions it requests?

Encrypted Client Hello (ECH) - Frequently asked questions

Global Privacy Control in Firefox for Android

Reset your Mozilla account password to protect your credentials

How do I share Firefox between people on a computer?

Firefox Focus for Android - Frequently asked questions

How do you use Adjust in Firefox?

"Certificate cannot be trusted" warning in Kazakhstan

Change your two-step authentication device for your Mozilla account

Turn on Mozilla VPN on your Android device

Grant camera access to Firefox for Android

Use Web Apps with Firefox for Android

Primary Password is replacing Master Password in Thunderbird

View and control data collected by Mozilla VPN

OpenPGP Recipient Alias Configuration

Exclude applications from Mozilla VPN protection

Use Multi-Account Containers with Mozilla VPN

What to do after you have subscribed to Mozilla VPN

Firefox Relay - Email and Phone masks

HTTPS-Only Mode in Firefox Focus for Android

Automatic Conversion of Google mail accounts to OAuth 2.0 Authentication

Safari Integration in Firefox Focus for iOS

Prerequisite for sending an encrypted email message

Mask your phone number with Relay Phone Masking

How do I report an issue with Firefox Relay?

Resolve breaches with Mozilla Monitor

Relay Phone Masking FAQ

Data Loss Prevention

Privacy-Preserving Attribution

HTTPS-First upgrades to secure connections

Firefox for Android’s protection against fingerprinters

Fix phone masking issues and protect voicemail privacy in Relay

Hide your email using Firefox Relay on Android when signing up on websites

Statistics for Firefox Homepage Sponsors

Block and unblock websites with parental controls on Firefox

Create secure passwords to keep your identity safe

Share data with Mozilla to help improve Firefox

How to stay safe on the web

How do I enable the Firefox OS phone lock?

Share your Android device with a Firefox Guest Session

Master password requested but not set Redirect 1

Certificates

Why does Thunderbird warn me that my server don't use encryption?

Digitally Signing and Encrypting Messages

How Thunderbird’s scam detection works?

How can I digitally sign and encrypt emails?

Thunderbird and Logjam

Send usage data on Firefox mobile browsers

Suspicious activity on my Mozilla account

Keep Private Browsing tabs open after exiting Firefox

About Firefox Desktop Attribution

Open a new private tab in Firefox Focus for Android

Tracking Protection on Firefox Focus for iOS

Block cookies in Firefox Focus for Android

Safe browsing in Firefox Focus

Tracking Protection in Firefox Preview

How Firefox Sync keeps your data safe even if TLS fails

Telemetry collection and deletion

My privacy settings were changed from Custom to Standard

Turn on/off saved logins, login sync and login autofill in Firefox for Android

Compatibility with Exploit protection on Windows

Primary Password is replacing Master Password

Thunderbird Telemetry

Telemetry collection - Windows default browser trends

Disable email forwarding - Stop receiving emails sent through your masks

Site Permissions panel

How do I reset Mozilla VPN?

Use labels to keep your masks organized in Firefox Relay

Usage Data Changes for Firefox for iOS and Android

Install the Firefox Relay extension on Firefox for desktop

What to do after a data breach

Quickly access previously generated masks

Unsafe properties of OpenPGP keys might be ignored

What are email trackers and how can I block them with Firefox Relay?

Change site permissions in Firefox Focus for Android

Thunderbird and OpenPGP Alias Keys

OpenPGP keys might be authentic or counterfeit

Disable credit card and payment method syncing across devices

Block deceptive content and dangerous downloads in Firefox

Relay Phone Masking - How long can I talk when I get a call?

How do I block phone calls or texts to my Relay Phone mask?

How does Firefox for iOS use the permissions it requests?

How does Firefox Focus for Android use the permissions it requests?

How do I monitor multiple email addresses?

How do I change my Privacy features?

How to automatically label your new email masks

Understand Encrypted Client Hello (ECH)

Using OpenPGP secret keys that advertise features that are not supported by Thunderbird

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