Privacy and security

Learn how to protect your privacy and secure your data.

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Troubleshoot network errors when TLS key logging is enabled

Avoid and report Mozilla tech support scams

Firefox Terms of Use FAQ

Use built-in VPN in Firefox

Third-party trackers

Private Browsing on Firefox for Android

Insecure connection password warning in Firefox

Enhanced Tracking Protection in Firefox for desktop

Does Firefox share my location with websites?

How Private Windows protect you

Use built-in VPN in Firefox for Android

Enhanced Tracking Protection in Firefox for Android

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

Firefox Password Manager - Alerts for breached websites

How do I turn on the Do Not Track feature?

Mobile - Manage Firefox data collection and privacy settings

Choose a strong password

Manage marketing data settings in Firefox for Android

Remote Content in Messages

Trackers and scripts Firefox blocks in Enhanced Tracking Protection

HTTPS-Only Mode in Firefox for Android

Firefox security features warning on Linux

Use a Primary Password to protect stored logins and passwords

How to set up Firefox Sync in Firefox for Android

How does built-in Phishing and Malware Protection work?

Block ads in Firefox for iOS

Introducing Total Cookie Protection in Standard Mode

Password Manager - Remember, delete and change passwords in Thunderbird

Troubleshoot Firefox issues caused by malware

How to use Firefox containers

Manage remote improvements settings in Firefox

Firefox connection upgrades - HTTP to HTTPS

Resist Fingerprinting

Configure DNS over HTTPS protection levels in Firefox for Android

Pop-up blocker settings, exceptions and troubleshooting

Control personal device and local network permissions in Firefox

Is Mozilla VPN free?

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

Protect privacy while using Web Authentication

Add Firefox Relay to the Firefox password manager

Search suggestions in Firefox

Enhanced Tracking Protection in Firefox for iOS

HTTPS-Only Mode in Firefox

How do I set up Sync on my computer?

Share browser windows or your screen with sites you trust

Mozilla Monitor - Frequently asked questions

Sponsors on the home page and New Tab page

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

Configure DNS over HTTPS protection levels in Firefox

Protect your Thunderbird passwords with a Primary Password

How to stop Firefox from making automatic connections

Clear browsing history in Firefox for iOS

Private Browsing - Use Firefox without saving history

How to manage your camera and microphone permissions with Firefox

Introduction to End-to-end encryption in Thunderbird

HTTPS-Only Mode in Firefox Focus for Android

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

Microsoft OAuth Authentication and Thunderbird in 2026

Remove a synced device from your Mozilla account

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

Manage technical and interaction data collection settings in Firefox

Oblivious HTTP (OHTTP) explained

Change your Mozilla account password

Mozilla service providers and partners

Firefox DNS over HTTPS

Site Permissions panel

Mozilla VPN - FAQ

Control personal device and local network permissions on Firefox for Android

Unable to find the built-in VPN in Firefox

Delete browsing, search and download history on Firefox

About private browsing in Firefox for iOS

Autofill logins on Firefox

Turn on Mozilla VPN on your Android device

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

Total Cookie Protection and website breakage FAQ

Global Privacy Control

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

Crash reports in Firefox for Desktop

Clear your browsing history in Firefox for Android

How Firefox securely saves passwords

Manage your logins with the Firefox Password Manager

Firefox privacy and security features

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

How do I change my DNS settings?

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

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

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

Certificate contains the same serial number as another certificate

Disable Firefox Sync on a lost phone or tablet

Mixed content blocking in Firefox

Set up a passcode and Face ID in Firefox for iOS

I found a fake Firefox update

How do I know the status of my sync?

Protect your container tabs with Mozilla VPN

Change your two-step authentication device for your Mozilla account

Activate Firefox Relay - Mask your email address

Create an email mask through Firefox Relay

SmartBlock for Enhanced Tracking Protection

Recommended Firefox privacy and security settings for families

Automatically trust third-party root certificates

Global Privacy Control in Firefox for Android

Manage daily usage ping data collection settings in Firefox

Reset your Mozilla account password to protect your credentials

Block and unblock websites with parental controls on Firefox

How do I choose what information to sync on Firefox?

Secure website certificate

Open a new private tab in Firefox Focus for Android

How Firefox Sync keeps your data safe even if TLS fails

DNS over HTTPS (DoH) FAQs

OpenPGP in Thunderbird - HOWTO and FAQ

OpenPGP Recipient Alias Configuration

Exclude applications from Mozilla VPN protection

How do I reset Mozilla VPN?

Usage Data Changes for Firefox for iOS and Android

What to do after you have subscribed to Mozilla VPN

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 Privacy features?

Encrypted Client Hello (ECH) - Frequently asked questions

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

Generate strong passwords in Firefox for Android

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

Manage marketing data settings in Firefox for Desktop

HTTPS-First upgrades to secure connections

Harmful add-on protection

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

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

Add trusted websites to your allow list in Firefox Focus

Tracking Protection in Firefox Preview

"Certificate cannot be trusted" warning in Kazakhstan

Browsing history in Firefox - View the websites you have visited

Disable Firefox Sync

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

Primary Password is replacing Master Password in Thunderbird

View and control data collected by 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 to automatically label your new email masks

Understand Encrypted Client Hello (ECH)

Relay Phone Masking FAQ

Data Loss Prevention

Privacy-Preserving Attribution

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

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