Privacy and security

Learn how to protect your privacy and secure your data.

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Use built-in VPN in Firefox

Troubleshoot network errors when TLS key logging is enabled

How Private Windows protect you

Avoid and report Mozilla tech support scams

Firefox Terms of Use FAQ

Third-party trackers

Private Browsing on Firefox for Android

Insecure connection password warning in Firefox

Private Browsing - Use Firefox without saving history

Does Firefox share my location with websites?

Use built-in VPN in Firefox for Android

Enhanced Tracking Protection in Firefox for Android

Firefox Password Manager - Alerts for breached websites

Manage marketing data settings in Firefox for Android

How do I turn on the Do Not Track feature?

Manage remote improvements settings in Firefox

Choose a strong password

Mobile - Manage Firefox data collection and privacy settings

Use a Primary Password to protect stored logins and passwords

Enhanced Tracking Protection in Firefox for desktop

Control personal device and local network permissions in Firefox

Remote Content in Messages

How to set up Firefox Sync in Firefox for Android

Firefox security features warning on Linux

HTTPS-Only Mode in Firefox for Android

Add Firefox Relay to the Firefox password manager

How to use Firefox containers

Trackers and scripts Firefox blocks in Enhanced Tracking Protection

Block ads in Firefox for iOS

How do I set up Sync on my computer?

How does built-in Phishing and Malware Protection work?

Sponsors on the home page and New Tab page

Configure DNS over HTTPS protection levels in Firefox

Introducing Total Cookie Protection in Standard Mode

Global Privacy Control

How to manage your camera and microphone permissions with Firefox

Pop-up blocker settings, exceptions and troubleshooting

Password Manager - Remember, delete and change passwords in Thunderbird

Manage technical and interaction data collection settings in Firefox

Unable to find the built-in VPN in Firefox

Troubleshoot Firefox issues caused by malware

HTTPS-Only Mode in Firefox

About private browsing in Firefox for iOS

Configure DNS over HTTPS protection levels in Firefox for Android

Delete browsing, search and download history on Firefox

Enhanced Tracking Protection in Firefox for iOS

Resist Fingerprinting

Search suggestions in Firefox

Firefox connection upgrades - HTTP to HTTPS

Protect privacy while using Web Authentication

Is Mozilla VPN free?

Mozilla Monitor - Frequently asked questions

SmartBlock for Enhanced Tracking Protection

Manage daily usage ping data collection settings in Firefox

Share browser windows or your screen with sites you trust

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

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

Protect your Thunderbird passwords with a Primary Password

Clear browsing history in Firefox for iOS

Introduction to End-to-end encryption in Thunderbird

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

Mozilla VPN - FAQ

How to stop Firefox from making automatic connections

HTTPS-Only Mode in Firefox Focus for Android

Total Cookie Protection and website breakage FAQ

Microsoft OAuth Authentication and Thunderbird in 2026

Automatically trust third-party root certificates

Mozilla service providers and partners

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

Crash reports in Firefox for Desktop

Secure website certificate

Remove a synced device from your Mozilla account

Firefox DNS over HTTPS

Autofill logins on Firefox

Site Permissions panel

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

How do I choose what information to sync on Firefox?

Mixed content blocking in Firefox

Change your Mozilla account password

I found a fake Firefox update

How Firefox securely saves passwords

Disable Firefox Sync

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

Activate Firefox Relay - Mask your email address

Manage marketing data settings in Firefox for Desktop

Oblivious HTTP (OHTTP) explained

Control personal device and local network permissions on Firefox for Android

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

Clear your browsing history in Firefox for Android

Manage your logins with the Firefox Password Manager

Automatically fill in credit and debit card payment methods data on web forms

OpenPGP in Thunderbird - HOWTO and FAQ

Firefox privacy and security features

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

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

Disable Firefox Sync on a lost phone or tablet

How do I know the status of my sync?

Protect your container tabs with Mozilla VPN

Turn on Mozilla VPN on your Android device

Create an email mask through Firefox Relay

OpenPGP Recipient Alias Configuration

What to do after a data breach

Safari Integration in Firefox Focus for iOS

Disable password saving in Firefox

How do I monitor multiple email addresses?

How do I change my DNS settings?

Getting started with Thunderbird for Android

Reset your Mozilla account password to protect your credentials

Use breach alerts in Firefox

Block and unblock websites with parental controls on Firefox

Certificate contains the same serial number as another certificate

Set up a passcode and Face ID in Firefox for iOS

Add trusted websites to your allow list in Firefox Focus

How Firefox Sync keeps your data safe even if TLS fails

Change your two-step authentication device for your Mozilla account

DNS over HTTPS (DoH) FAQs

Browsing history in Firefox - View the websites you have visited

Primary Password is replacing Master Password in Thunderbird

Exclude applications from Mozilla VPN protection

Usage Data Changes for Firefox for iOS and Android

What to do after you have subscribed to Mozilla VPN

Recommended Firefox privacy and security settings for families

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

Encrypted Client Hello (ECH) - Frequently asked questions

Global Privacy Control in Firefox for Android

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

Manage Enhanced Tracking Protection exceptions

Create secure passwords to keep your identity safe

How does Firefox for Android use the permissions it requests?

Share data with Mozilla to help improve Firefox

How do I share Firefox between people on a computer?

How to stay safe on the web

How do I enable the Firefox OS phone lock?

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

Site Information panel

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

Firefox Focus for Android - Frequently asked questions

Open a new private tab in Firefox Focus for Android

Tracking Protection on Firefox Focus for iOS

Block cookies in Firefox Focus for Android

How do you use Adjust in Firefox?

Safe browsing in Firefox Focus

Tracking Protection in Firefox Preview

"Certificate cannot be trusted" warning in Kazakhstan

Telemetry collection and deletion

My privacy settings were changed from Custom to Standard

Compatibility with Exploit protection on Windows

Thunderbird Telemetry

Telemetry collection - Windows default browser trends

Disable email forwarding - Stop receiving emails sent through your masks

Grant camera access to Firefox for Android

Use Web Apps with Firefox for Android

View and control data collected by Mozilla VPN

How do I reset Mozilla VPN?

Use Multi-Account Containers with Mozilla VPN

Use labels to keep your masks organized in Firefox Relay

Install the Firefox Relay extension on Firefox for desktop

Firefox Relay - Email and Phone masks

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

Prerequisite for sending an encrypted email message

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

Mask your phone number with Relay Phone Masking

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 do I report an issue with Firefox Relay?

Resolve breaches with Mozilla Monitor

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

How do I change my Privacy features?

How to automatically label your new email masks

Understand Encrypted Client Hello (ECH)

Relay Phone Masking FAQ

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

Data Loss Prevention

Privacy-Preserving Attribution

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

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