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Learn how to protect your privacy and secure your data.

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Common Myths about Private Browsing

Firefox Terms of Use FAQ

Use built-in VPN in Firefox

Avoid and report Mozilla tech support scams

Insecure connection password warning in Firefox

Third-party trackers

Enhanced Tracking Protection in Firefox for desktop

Enhanced Tracking Protection in Firefox for Android

Does Firefox share my location with websites?

Add Firefox Relay to the Firefox password manager

Private Browsing - Use Firefox without saving history

Private Browsing on Firefox for Android

How to use Firefox containers

Sponsors on the home page and New Tab page

Firefox Password Manager - Alerts for breached websites

Pop-up blocker settings, exceptions and troubleshooting

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

Configure DNS over HTTPS protection levels in Firefox

How do I set up Sync on my computer?

About private browsing in Firefox for iOS

How to manage your camera and microphone permissions with Firefox

How to set up Firefox Sync in Firefox for Android

Use a Primary Password to protect stored logins and passwords

Delete browsing, search and download history on Firefox

Control personal device and local network permissions in Firefox

Remote Content in Messages

Firefox security features warning on Linux

How does built-in Phishing and Malware Protection work?

Manage remote improvements settings in Firefox

Manage marketing data settings in Firefox for Android

HTTPS-Only Mode in Firefox for Android

Global Privacy Control

Choose a strong password

Troubleshoot Firefox issues caused by malware

Search suggestions in Firefox

Manage daily usage ping data collection settings in Firefox

Introducing Total Cookie Protection in Standard Mode

How do I turn on the Do Not Track feature?

Protect privacy while using Web Authentication

Trackers and scripts Firefox blocks in Enhanced Tracking Protection

Secure website certificate

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

SmartBlock for Enhanced Tracking Protection

Password Manager - Remember, delete and change passwords in Thunderbird

Firefox connection upgrades - HTTP to HTTPS

Unable to find the built-in VPN in Firefox

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

Manage technical and interaction data collection settings in Firefox

Automatically trust third-party root certificates

Mozilla Monitor - Frequently asked questions

Manage Enhanced Tracking Protection exceptions

Configure DNS over HTTPS protection levels in Firefox for Android

I found a fake Firefox update

Mixed content blocking in Firefox

Manage your logins with the Firefox Password Manager

Manage marketing data settings in Firefox for Desktop

Resist Fingerprinting

Firefox DNS over HTTPS

Is Mozilla VPN free?

Crash reports in Firefox for Desktop

Disable Firefox Sync

HTTPS-Only Mode in Firefox Focus for Android

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

How do I change my DNS settings?

Mobile - Manage Firefox data collection and privacy settings

Use breach alerts in Firefox

Share browser windows or your screen with sites you trust

Mozilla service providers and partners

Autofill logins on Firefox

Introduction to End-to-end encryption in Thunderbird

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

Clear your browsing history in Firefox for Android

Clear browsing history in Firefox for iOS

Turn on Mozilla VPN on your Android device

How do I choose what information to sync on Firefox?

Site Information panel

Protect your container tabs with Mozilla VPN

Activate Firefox Relay - Mask your email address

Safari Integration in Firefox Focus for iOS

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

Getting started with Thunderbird for Android

Block and unblock websites with parental controls on Firefox

How to stop Firefox from making automatic connections

Change your Mozilla account password

Enhanced Tracking Protection in Firefox for iOS

Remove a synced device from your Mozilla account

Add trusted websites to your allow list in Firefox Focus

How Firefox securely saves passwords

OpenPGP in Thunderbird - HOWTO and FAQ

Use Web Apps with Firefox for Android

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

Mozilla VPN - FAQ

Recommended Firefox privacy and security settings for families

Mask your phone number with Relay Phone Masking

Microsoft OAuth Authentication and Thunderbird in 2026

Oblivious HTTP (OHTTP) explained

Troubleshoot network errors when TLS key logging is enabled

How do I share Firefox between people on a computer?

Change your two-step authentication device for your Mozilla account

DNS over HTTPS (DoH) FAQs

Browsing history in Firefox - View the websites you have visited

Create an email mask through Firefox Relay

Site Permissions panel

Use labels to keep your masks organized in Firefox Relay

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

Understand Encrypted Client Hello (ECH)

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

Certificate contains the same serial number as another certificate

Disable Firefox Sync on a lost phone or tablet

Digitally Signing and Encrypting Messages

Set up a passcode and Face ID in Firefox for iOS

How Firefox Sync keeps your data safe even if TLS fails

HTTPS-Only Mode in Firefox

Primary Password is replacing Master Password in Thunderbird

View and control data collected by Mozilla VPN

How do I reset Mozilla VPN?

Use Multi-Account Containers with Mozilla VPN

Install the Firefox Relay extension on Firefox for desktop

Firefox Relay - Email and Phone masks

What to do after a data breach

Total Cookie Protection and website breakage FAQ

Change site permissions in Firefox Focus for Android

Firefox privacy and security features

Disable password saving in Firefox

Block deceptive content and dangerous downloads in Firefox

How do I report an issue with Firefox Relay?

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

Thunderbird Mobile Telemetry

Reset your Mozilla account password to protect your credentials

Lock your private tabs on Firefox for Android

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

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?

Protect your Thunderbird passwords with a Primary Password

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

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

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

How do I know the status of my sync?

Tracking Protection in Firefox Preview

"Certificate cannot be trusted" warning in Kazakhstan

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

Disable email forwarding - Stop receiving emails sent through your masks

Grant camera access to Firefox for Android

OpenPGP Recipient Alias Configuration

Exclude applications from Mozilla VPN protection

Usage Data Changes for Firefox for iOS and Android

What to do after you have subscribed to Mozilla VPN

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?

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

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 monitor multiple email addresses?

How do I change my Privacy features?

How to automatically label your new email masks

Encrypted Client Hello (ECH) - Frequently asked questions

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

Relay Phone Masking FAQ

Global Privacy Control in Firefox for Android

Data Loss Prevention

Privacy-Preserving Attribution

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

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