Privacy and security

Learn how to protect your privacy and secure your data.

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Firefox Terms of Use FAQ

Common Myths about Private Browsing

Use built-in VPN in Firefox

Enhanced Tracking Protection in Firefox for desktop

Insecure connection password warning in Firefox

Avoid and report Mozilla tech support scams

Third-party trackers

Private Browsing on Firefox for Android

Enhanced Tracking Protection in Firefox for Android

Does Firefox share my location with websites?

Configure DNS over HTTPS protection levels in Firefox

Sponsors on the home page and New Tab page

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

Firefox Password Manager - Alerts for breached websites

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

Use a Primary Password to protect stored logins and passwords

Private Browsing - Use Firefox without saving history

Add Firefox Relay to the Firefox password manager

Trackers and scripts Firefox blocks in Enhanced Tracking Protection

HTTPS-Only Mode in Firefox

Manage remote improvements settings in Firefox

Delete browsing, search and download history on Firefox

Choose a strong password

How does built-in Phishing and Malware Protection work?

Mobile - Manage Firefox data collection and privacy settings

What is Mozilla VPN and how does it work?

Manage technical and interaction data collection settings in Firefox

How do I turn on the Do Not Track feature?

HTTPS-Only Mode in Firefox for Android

Firefox security features warning on Linux

How to set up Firefox Sync in Firefox for Android

Remote Content in Messages

How do I set up Sync on my computer?

Secure website certificate

Protect privacy while using Web Authentication

Search suggestions in Firefox

Firefox connection upgrades - HTTP to HTTPS

Mozilla Monitor - Frequently asked questions

Manage daily usage ping data collection settings in Firefox

How to use Firefox containers

Automatically trust third-party root certificates

SmartBlock for Enhanced Tracking Protection

Configure DNS over HTTPS protection levels in Firefox for Android

Resist Fingerprinting

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

How do I choose what information to sync on Firefox?

Manage Enhanced Tracking Protection exceptions

Password Manager - Remember, delete and change passwords in Thunderbird

Troubleshoot Firefox issues caused by malware

I found a fake Firefox update

Is Mozilla VPN free?

Mixed content blocking in Firefox

Manage marketing data settings in Firefox for Android

Crash reports in Firefox for Desktop

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

Firefox DNS over HTTPS

OpenPGP in Thunderbird - HOWTO and FAQ

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

Manage marketing data settings in Firefox for Desktop

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

Microsoft OAuth Authentication and Thunderbird in 2024

How do I change my DNS settings?

Mozilla service providers and partners

Site Information panel

Share browser windows or your screen with sites you trust

Autofill logins on Firefox

Mozilla VPN - FAQ

How to stop Firefox from making automatic connections

Clear browsing history in Firefox for iOS

Disable Firefox Sync

How do I turn on Mozilla VPN?

Introduction to End-to-end encryption in Thunderbird

Site Permissions panel

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

Protect your Thunderbird passwords with a Primary Password

About private browsing in Firefox for iOS

Enhanced Tracking Protection in Firefox for iOS

Remove a synced device from your Mozilla account

Manage your logins with the Firefox Password Manager

Getting started with Thunderbird for Android

Oblivious HTTP (OHTTP) explained

Disable Firefox Sync on a lost phone or tablet

Change your Mozilla account password

How Firefox securely saves passwords

How Firefox Sync keeps your data safe even if TLS fails

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

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

Reset your Mozilla account password to protect your credentials

Set up a passcode and Face ID in Firefox for iOS

Protect your container tabs with Mozilla VPN

OpenPGP Recipient Alias Configuration

Total Cookie Protection and website breakage FAQ

Automatic Conversion of Google mail accounts to OAuth 2.0 Authentication

Disable password saving in Firefox

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

Understand Encrypted Client Hello (ECH)

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

Thunderbird Mobile Telemetry

Block and unblock websites with parental controls on Firefox

Clear your browsing history in 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

DNS over HTTPS (DoH) FAQs

Primary Password is replacing Master Password in Thunderbird

Exclude applications from Mozilla VPN protection

Firefox privacy and security features

Relay Phone Masking FAQ

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

Control personal device and local network permissions in Firefox

Statistics for Firefox Homepage Sponsors

Certificate contains the same serial number as another certificate

How do I share Firefox between people on a computer?

Digitally Signing and Encrypting Messages

Suspicious activity on my Mozilla account

How do you use Adjust in Firefox?

"Certificate cannot be trusted" warning in Kazakhstan

Browsing history in Firefox - View the websites you have visited

Telemetry collection - Windows default browser trends

Create an email mask through Firefox Relay

Use Web Apps with Firefox for Android

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

What to do after you have subscribed to Mozilla VPN

What to do after a data breach

HTTPS-Only Mode in Firefox Focus for Android

Quickly access previously generated masks

Safari Integration in Firefox Focus for iOS

Prerequisite for sending an encrypted email message

Recommended Firefox privacy and security settings for families

Mask your phone number with Relay Phone Masking

How do I report an issue with Firefox Relay?

Resolve breaches with Mozilla Monitor

How to automatically label your new email masks

Encrypted Client Hello (ECH) - Frequently asked questions

Data Loss Prevention

HTTPS-First upgrades to secure connections

Fix phone masking issues and protect voicemail privacy in Relay

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 to stay safe on the web

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

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

Safe browsing in Firefox Focus

Tracking Protection in Firefox Preview

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

Primary Password is replacing Master Password

Thunderbird Telemetry

Activate Firefox Relay - Mask your email address

Disable email forwarding - Stop receiving emails sent through your masks

Grant camera access to Firefox for Android

View and control data collected by Mozilla VPN

Install the Firefox Relay extension on Firefox for desktop

Firefox Relay - Email and Phone 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

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

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?

How do I change my Privacy features?

Global Privacy Control in Firefox for Android

Privacy-Preserving Attribution

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

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