Privacy and security

Learn how to protect your privacy and secure your data.

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Enhanced Tracking Protection in Firefox for desktop

How Private Windows protect you

Troubleshoot network errors when TLS key logging is enabled

Use built-in VPN in Firefox

Private Browsing - Use Firefox without saving history

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

Does Firefox share my location with websites?

Trackers and scripts Firefox blocks in Enhanced Tracking Protection

How do I set up Sync on my computer?

Add Firefox Relay to the Firefox password manager

Sponsors on the home page and New Tab page

Enhanced Tracking Protection in Firefox for Android

Manage remote improvements settings in Firefox

Firefox Password Manager - Alerts for breached websites

How to use Firefox containers

Control personal device and local network permissions in Firefox

Configure DNS over HTTPS protection levels in Firefox

Pop-up blocker settings, exceptions and troubleshooting

Global Privacy Control

Use a Primary Password to protect stored logins and passwords

Manage marketing data settings in Firefox for Android

Secure website certificate

Choose a strong password

Manage technical and interaction data collection settings in Firefox

Unable to find the built-in VPN in Firefox

Delete browsing, search and download history on Firefox

About private browsing in Firefox for iOS

How to manage your camera and microphone permissions with Firefox

Use built-in VPN in Firefox for Android

Remote Content in Messages

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

HTTPS-Only Mode in Firefox

HTTPS-Only Mode in Firefox for Android

Mobile - Manage Firefox data collection and privacy settings

How do I turn on the Do Not Track feature?

How to set up Firefox Sync in Firefox for Android

Manage Enhanced Tracking Protection exceptions

Firefox security features warning on Linux

Block ads in Firefox for iOS

Introducing Total Cookie Protection in Standard Mode

How does built-in Phishing and Malware Protection work?

SmartBlock for Enhanced Tracking Protection

Manage daily usage ping data collection settings in Firefox

Firefox connection upgrades - HTTP to HTTPS

I found a fake Firefox update

Configure DNS over HTTPS protection levels in Firefox for Android

Troubleshoot Firefox issues caused by malware

Password Manager - Remember, delete and change passwords in Thunderbird

Mixed content blocking in Firefox

Protect privacy while using Web Authentication

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

Share browser windows or your screen with sites you trust

Resist Fingerprinting

Use breach alerts in Firefox

How do I choose what information to sync on Firefox?

Search suggestions in Firefox

Firefox DNS over HTTPS

Automatically trust third-party root certificates

Manage marketing data settings in Firefox for Desktop

Introduction to End-to-end encryption in Thunderbird

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

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

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

Enhanced Tracking Protection in Firefox for iOS

Disable Firefox Sync

Mozilla VPN - FAQ

Change your Mozilla account password

Mozilla Monitor - Frequently asked questions

Autofill logins on Firefox

Is Mozilla VPN free?

Microsoft OAuth Authentication and Thunderbird in 2026

Crash reports in Firefox for Desktop

How to stop Firefox from making automatic connections

Site Information panel

Total Cookie Protection and website breakage FAQ

Mozilla service providers and partners

Turn on Mozilla VPN on your Android device

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

Protect your container tabs with Mozilla VPN

Browsing history in Firefox - View the websites you have visited

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

Disable Firefox Sync on a lost phone or tablet

Protect your Thunderbird passwords with a Primary Password

Clear browsing history in Firefox for iOS

How Firefox securely saves passwords

Manage your logins with the Firefox Password Manager

Activate Firefox Relay - Mask your email address

Create an email mask through Firefox Relay

OpenPGP in Thunderbird - HOWTO and FAQ

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

HTTPS-Only Mode in Firefox Focus for Android

Firefox privacy and security features

Disable password saving in Firefox

Oblivious HTTP (OHTTP) explained

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

Clear your browsing history in Firefox for Android

DNS over HTTPS (DoH) FAQs

OpenPGP Recipient Alias Configuration

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

Certificate contains the same serial number as another certificate

How to stay safe on the web

Suspicious activity on my Mozilla account

Remove a synced device from your Mozilla account

Use Web Apps with Firefox for Android

Primary Password is replacing Master Password in Thunderbird

View and control data collected by Mozilla VPN

Exclude applications from Mozilla VPN protection

Recommended Firefox privacy and security settings for families

Disable credit card and payment method syncing across devices

How do I report an issue with Firefox Relay?

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

How do I monitor multiple email addresses?

How do I change my DNS settings?

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

Getting started with Thunderbird for Android

Reset your Mozilla account password to protect your credentials

Control personal device and local network permissions on Firefox for Android

Add trusted websites to your allow list in Firefox Focus

How do I know the status of my sync?

Change your two-step authentication device for your Mozilla account

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

Firefox Relay - Email and Phone masks

What to do after a data breach

Safari Integration in Firefox Focus for iOS

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

Understand Encrypted Client Hello (ECH)

Thunderbird Mobile Telemetry

Fix phone masking issues and protect voicemail privacy in Relay

See trackers blocked in Firefox for Android

Block and unblock websites with parental controls on Firefox

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 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

Send usage data on Firefox mobile browsers

Set up a passcode and Face ID in Firefox for iOS

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

Privacy settings in Firefox for Enterprise

Tracking Protection in Firefox Preview

"Certificate cannot be trusted" warning in Kazakhstan

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

Thunderbird Telemetry

Telemetry collection - Windows default browser trends

Grant camera access to Firefox for Android

Use Multi-Account Containers with Mozilla VPN

What to do after you have subscribed to Mozilla VPN

Install the Firefox Relay extension on Firefox for desktop

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

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?

Resolve breaches with Mozilla Monitor

How do I change my Privacy features?

How to automatically label your new email masks

Encrypted Client Hello (ECH) - Frequently asked questions

Relay Phone Masking FAQ

Global Privacy Control in Firefox for Android

Data Loss Prevention

Privacy-Preserving Attribution

Generate strong passwords in Firefox for Android

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

OpenPGP in Thunderbird for Android - How To

HTTPS-First upgrades to secure connections

Manage daily usage ping data collection settings in Firefox Focus

Firefox for Android’s protection against fingerprinters

Lock your private tabs on Firefox for Android

Understand unexpected script warnings in Firefox

Firefox Homepage Lift Studies

Harmful add-on protection

Statistics for Firefox Homepage Sponsors

Let websites notify you while Firefox is closed

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