Privacy and security

Learn how to protect your privacy and secure your data.

In English

Common Myths about Private Browsing

Use built-in VPN in Firefox

Firefox Terms of Use FAQ

Avoid and report Mozilla tech support scams

Insecure connection password warning in Firefox

Private Browsing on Firefox for Android

Third-party trackers

Add Firefox Relay to the Firefox password manager

Enhanced Tracking Protection in Firefox for Android

Configure DNS over HTTPS protection levels in Firefox

How to set up Firefox Sync in Firefox for Android

Private Browsing - Use Firefox without saving history

Firefox security features warning on Linux

About private browsing in Firefox for iOS

Introducing Total Cookie Protection in Standard Mode

How does built-in Phishing and Malware Protection work?

Choose a strong password

Enhanced Tracking Protection in Firefox for desktop

Mobile - Manage Firefox data collection and privacy settings

How do I turn on the Do Not Track feature?

Remote Content in Messages

Sponsors on the home page and New Tab page

Search suggestions in Firefox

HTTPS-Only Mode in Firefox for Android

Does Firefox share my location with websites?

Protect privacy while using Web Authentication

How to use Firefox containers

Secure website certificate

Firefox connection upgrades - HTTP to HTTPS

Manage marketing data settings in Firefox for Android

Firefox Password Manager - Alerts for breached websites

Troubleshoot Firefox issues caused by malware

Is Mozilla VPN free?

Global Privacy Control

SmartBlock for Enhanced Tracking Protection

Configure DNS over HTTPS protection levels in Firefox for Android

Mozilla Monitor - Frequently asked questions

Manage remote improvements settings in Firefox

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

Pop-up blocker settings, exceptions and troubleshooting

I found a fake Firefox update

Password Manager - Remember, delete and change passwords in Thunderbird

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

Mixed content blocking in Firefox

Resist Fingerprinting

Introduction to End-to-end encryption in Thunderbird

Share browser windows or your screen with sites you trust

How to manage your camera and microphone permissions with Firefox

Delete browsing, search and download history on Firefox

How do I set up Sync on my computer?

Use a Primary Password to protect stored logins and passwords

Manage Enhanced Tracking Protection exceptions

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

Clear browsing history in Firefox for iOS

Site Information panel

Firefox DNS over HTTPS

Enhanced Tracking Protection in Firefox for iOS

How Firefox securely saves passwords

DNS over HTTPS (DoH) FAQs

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

Manage daily usage ping data collection settings in Firefox

Disable Firefox Sync on a lost phone or tablet

Activate Firefox Relay - Mask your email address

Unable to find the built-in VPN in Firefox

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

Mozilla VPN - FAQ

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

Oblivious HTTP (OHTTP) explained

How to stop Firefox from making automatic connections

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

Protect your Thunderbird passwords with a Primary Password

Clear your browsing history in Firefox for Android

Change your Mozilla account password

Remove a synced device from your Mozilla account

Trackers and scripts Firefox blocks in Enhanced Tracking Protection

Browsing history in Firefox - View the websites you have visited

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

OpenPGP in Thunderbird - HOWTO and FAQ

How do I change my DNS settings?

How do I choose what information to sync on Firefox?

Add trusted websites to your allow list in Firefox Focus

Protect your container tabs with Mozilla VPN

Manage your logins with the Firefox Password Manager

Mozilla service providers and partners

HTTPS-Only Mode in Firefox

How do I report an issue with Firefox Relay?

How to automatically label your new email masks

Getting started with Thunderbird for Android

Reset your Mozilla account password to protect your credentials

How does Firefox for Android use the permissions it requests?

Firefox Focus for Android - Frequently asked questions

How do I know the status of my sync?

How Firefox Sync keeps your data safe even if TLS fails

Autofill logins on Firefox

Site Permissions panel

Exclude applications from Mozilla VPN protection

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

HTTPS-Only Mode in Firefox Focus for Android

Total Cookie Protection and website breakage FAQ

Safari Integration in Firefox Focus for iOS

Microsoft OAuth Authentication and Thunderbird in 2024

How do I change my Privacy features?

Understand Encrypted Client Hello (ECH)

Automatically trust third-party root certificates

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

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

OpenPGP in Thunderbird for Android - How To

Manage technical and interaction data collection settings in Firefox

Crash reports in Firefox for Desktop

Control personal device and local network permissions in Firefox

Control personal device and local network permissions on Firefox for Android

Block and unblock websites with parental controls on Firefox

How do I share Firefox between people on a computer?

How to stay safe on the web

Set up a passcode and Face ID in Firefox for iOS

Tracking Protection on Firefox Focus for iOS

Disable Firefox Sync

Turn on Mozilla VPN on your Android device

Telemetry collection - Windows default browser trends

Create an email mask through Firefox Relay

Use Web Apps with Firefox for Android

What to do after you have subscribed to Mozilla VPN

What to do after a data breach

Automatic Conversion of Google mail accounts to OAuth 2.0 Authentication

Firefox privacy and security features

Recommended Firefox privacy and security settings for families

Block deceptive content and dangerous downloads in Firefox

How does Firefox for iOS use the permissions it requests?

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

Encrypted Client Hello (ECH) - Frequently asked questions

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

Thunderbird Mobile Telemetry

Manage marketing data settings in Firefox for Desktop

Harmful add-on protection

Certificate contains the same serial number as another certificate

Create secure passwords to keep your identity safe

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?

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

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

Change your two-step authentication device for your Mozilla account

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

Disable email forwarding - Stop receiving emails sent through your masks

Grant camera access to Firefox for Android

Primary Password is replacing Master Password in Thunderbird

View and control data collected by Mozilla VPN

OpenPGP Recipient Alias Configuration

How do I reset Mozilla VPN?

Use Multi-Account Containers with Mozilla VPN

Usage Data Changes for Firefox for iOS and 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

Prerequisite for sending an encrypted email message

Thunderbird and OpenPGP Alias Keys

OpenPGP keys might be authentic or counterfeit

Disable password saving in Firefox

Disable credit card and payment method syncing across devices

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?

Resolve breaches with Mozilla Monitor

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

How do I monitor multiple email addresses?

Relay Phone Masking FAQ

Global Privacy Control in Firefox for Android

Data Loss Prevention

Privacy-Preserving Attribution

Generate strong passwords in Firefox for Android

How Review Checker preserves user privacy

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

Fix phone masking issues and protect voicemail privacy in Relay

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

Firefox Homepage Lift Studies

Statistics for Firefox Homepage Sponsors

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