Privacy and security

Learn how to protect your privacy and secure your data.

In English

Common Myths about Private Browsing

Third-party trackers

Avoid and report Mozilla tech support scams

Private Browsing on Firefox for Android

Configure DNS over HTTPS protection levels in Firefox

Does Firefox share my location with websites?

Add Firefox Relay to the Firefox password manager

Protect privacy while using Web Authentication

HTTPS-Only Mode in Firefox

Choose a strong password

Mobile - Manage Firefox data collection and privacy settings

Manage technical and interaction data collection settings in Firefox

Private Browsing in Firefox for iOS

How do I set up Sync on my computer?

Private Browsing - Use Firefox without saving history

Pop-up blocker settings, exceptions and troubleshooting

Introducing Total Cookie Protection in Standard Mode

Firefox Password Manager - Alerts for breached websites

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

Global Privacy Control

Firefox security features warning on Linux

How do I turn on the Do Not Track feature?

Mozilla Monitor - Frequently asked questions

How does built-in Phishing and Malware Protection work?

Remote Content in Messages

Pocket website cookies FAQ

HTTPS-Only Mode in Firefox for Android

Enhanced Tracking Protection in Firefox for Android

Privacy-Preserving Attribution

Troubleshoot Firefox issues caused by malware

How to set up Firefox Sync in Firefox for Android

Secure website certificate

Password Manager - Remember, delete and change passwords in Thunderbird

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

Firefox connection upgrades - HTTP to HTTPS

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

Trackers and scripts Firefox blocks in Enhanced Tracking Protection

Automatically trust third-party root certificates

Manage marketing data settings in Firefox for Android

Manage daily usage ping data collection settings in Firefox

Mixed content blocking in Firefox

Enhanced Tracking Protection in Firefox for iOS

How to use Firefox containers

Site Information panel

SmartBlock for Enhanced Tracking Protection

How does Monitor Plus work?

Resist Fingerprinting

Introduction to End-to-end encryption in Thunderbird

Crash reports in Firefox for Desktop

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

Search suggestions in Firefox

Microsoft OAuth Authentication and Thunderbird in 2024

DNS over HTTPS (DoH) FAQs

Firefox DNS over HTTPS

How to stop Firefox from making automatic connections

I found a fake Firefox update

Automatic Conversion of Google mail accounts to OAuth 2.0 Authentication

Certificate contains the same serial number as another certificate

Manage your logins with the Firefox Password Manager

Autofill logins on Firefox

OpenPGP in Thunderbird - HOWTO and FAQ

How do I change my DNS settings?

Site Permissions panel

Suspicious activity on my Mozilla account

Share browser windows or your screen with sites you trust

How Firefox securely saves passwords

Safari Integration in Firefox Focus for iOS

Get started with Mozilla Monitor

Oblivious HTTP (OHTTP) explained

What is Mozilla VPN and how does it work?

Encrypted Client Hello (ECH) - Frequently asked questions

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

Clear browsing history in Firefox for iOS

Firefox Focus for Android - Frequently asked questions

Enhanced Tracking Protection in Firefox for desktop

Browsing history in Firefox - View the websites you have visited

Telemetry collection - Windows default browser trends

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

HTTPS-Only Mode in Firefox Focus for Android

Total Cookie Protection and website breakage FAQ

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

Prerequisite for sending an encrypted email message

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

Firefox privacy and security features

Recommended Firefox privacy and security settings for families

Protect your Thunderbird passwords with a Primary Password

How do I know the status of my sync?

How Firefox Sync keeps your data safe even if TLS fails

Disable Firefox Sync

How do I turn on Mozilla VPN?

Create an email mask through Firefox Relay

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

Monthly Monitor Report Email

HTTPS-First upgrades to secure connections

Block and unblock websites with parental controls on Firefox

How does Firefox for Android use the permissions it requests?

How to stay safe on the web

Clear your browsing history in Firefox for Android

Insecure connection password warning in Firefox

Change your Mozilla account password

Protect your container tabs with Mozilla VPN

Change your two-step authentication device for your Mozilla account

Thunderbird Telemetry

Activate Firefox Relay - Mask your email address

Firefox Relay - Email and Phone masks

What to do after a data breach

Mozilla VPN - FAQ

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?

Get started with Monitor Plus

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

Manage daily usage ping data collection settings in Firefox Focus

How do I share Firefox between people on a computer?

Digitally Signing and Encrypting Messages

Set up a passcode and Face ID in Firefox for iOS

Primary Password is replacing Master Password in Thunderbird

Exclude applications from Mozilla VPN protection

Disable password saving in Firefox

How do I change my Privacy features?

Data broker scan

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

Getting started with Thunderbird for Android

Manage marketing data settings in Firefox for Desktop

Remove a synced device from your Mozilla account

How do you use Google Firebase in Firefox?

My privacy settings were changed from Custom to Standard

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

Primary Password is replacing Master Password

Grant camera access to Firefox for Android

Use Web Apps with Firefox for Android

What information does Mozilla VPN collect?

OpenPGP Recipient Alias Configuration

What to do after you have subscribed to Mozilla VPN

Thunderbird and OpenPGP Alias Keys

Mask your phone number with Relay Phone Masking

How to automatically label your new email masks

Pocket for iOS App privacy information

What permissions does Pocket for Android require and why?

Understand Encrypted Client Hello (ECH)

Relay Phone Masking FAQ

Global Privacy Control in Firefox for Android

Monitor status indicators

Thunderbird Android Telemetry

OpenPGP in Thunderbird for Android - How To

Disable Firefox Sync on a lost phone or tablet

How do I choose what information to sync on Firefox?

Share data with Mozilla to help improve Firefox

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?

How Thunderbird’s scam detection works?

How can I digitally sign and encrypt emails?

Thunderbird and Logjam

Send usage data on Firefox mobile browsers

Keep Private Browsing tabs open after exiting Firefox

About Firefox Desktop Attribution

Open a new private tab in Firefox Focus for Android

Clear your cache without clearing your browsing history

Tracking Protection on Firefox Focus for iOS

Block cookies in Firefox Focus for Android

Private Browsing in Firefox Lite

Firefox Monitor

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

Firefox Subprocessor List

"Certificate cannot be trusted" warning in Kazakhstan

Firefox Lite - What vendors do you use that could receive my data?

Is Mozilla VPN free?

Telemetry collection and deletion

Compatibility with Exploit protection on Windows

Disable email forwarding - Stop receiving emails sent through your masks

How do I reset Mozilla VPN?

Use Multi-Account Containers with 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

How to opt out of studies on Firefox Focus for iOS

How to opt out of studies on Firefox Focus for Android

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

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?

General questions about privacy protection scans

How to upgrade to Monitor Plus?

Data Loss Prevention

Generate strong passwords in Firefox for Android

How Review Checker preserves user privacy

Securing a New Partner for Monitor Plus

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

Firefox for Android’s protection against fingerprinters

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