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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

Avoid and report Mozilla tech support scams

Private Browsing on Firefox for Android

Third-party trackers

Insecure connection password warning in Firefox

Enhanced Tracking Protection in Firefox for desktop

Add Firefox Relay to the Firefox password manager

Sponsors on the home page and New Tab page

Enhanced Tracking Protection in Firefox for Android

Configure DNS over HTTPS protection levels in Firefox

Introducing Total Cookie Protection in Standard Mode

Private Browsing - Use Firefox without saving history

Manage remote improvements settings in Firefox

How do I set up Sync on my computer?

How to manage your camera and microphone permissions with Firefox

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

Global Privacy Control

Does Firefox share my location with websites?

Firefox Password Manager - Alerts for breached websites

Pop-up blocker settings, exceptions and troubleshooting

Mobile - Manage Firefox data collection and privacy settings

About private browsing in Firefox for iOS

Choose a strong password

Trackers and scripts Firefox blocks in Enhanced Tracking Protection

How do I turn on the Do Not Track feature?

Firefox security features warning on Linux

Remote Content in Messages

How does built-in Phishing and Malware Protection work?

How to set up Firefox Sync in Firefox for Android

HTTPS-Only Mode in Firefox

HTTPS-Only Mode in Firefox for Android

Secure website certificate

Search suggestions in Firefox

Protect privacy while using Web Authentication

Manage technical and interaction data collection settings in Firefox

Delete browsing, search and download history on Firefox

Firefox connection upgrades - HTTP to HTTPS

Mozilla Monitor - Frequently asked questions

Automatically trust third-party root certificates

Password Manager - Remember, delete and change passwords in Thunderbird

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

Manage daily usage ping data collection settings in Firefox

Configure DNS over HTTPS protection levels in Firefox for Android

Troubleshoot Firefox issues caused by malware

Control personal device and local network permissions in Firefox

Use a Primary Password to protect stored logins and passwords

SmartBlock for Enhanced Tracking Protection

Manage marketing data settings in Firefox for Android

Crash reports in Firefox for Desktop

What is Mozilla VPN and how does it work?

Manage Enhanced Tracking Protection exceptions

Resist Fingerprinting

Firefox DNS over HTTPS

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

Mozilla service providers and partners

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

Microsoft OAuth Authentication and Thunderbird in 2024

Share browser windows or your screen with sites you trust

Mixed content blocking in Firefox

How to use Firefox containers

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

Getting started with Thunderbird for Android

Manage marketing data settings in Firefox for Desktop

Oblivious HTTP (OHTTP) explained

How to stop Firefox from making automatic connections

Clear browsing history in Firefox for iOS

I found a fake Firefox update

Remove a synced device from your Mozilla account

How Firefox securely saves passwords

Autofill logins on Firefox

Activate Firefox Relay - Mask your email address

OpenPGP in Thunderbird - HOWTO and FAQ

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

Understand Encrypted Client Hello (ECH)

How do I choose what information to sync on Firefox?

Protect your Thunderbird passwords with a Primary Password

Set up a passcode and Face ID in Firefox for iOS

Change your Mozilla account password

Enhanced Tracking Protection in Firefox for iOS

How do I turn on Mozilla VPN?

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

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

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

Certificate contains the same serial number as another certificate

Disable Firefox Sync on a lost phone or tablet

How do I share Firefox between people on a computer?

Protect your container tabs with Mozilla VPN

Change your two-step authentication device for your Mozilla account

Disable Firefox Sync

Is Mozilla VPN free?

Introduction to End-to-end encryption in Thunderbird

Site Permissions panel

OpenPGP Recipient Alias Configuration

Firefox privacy and security features

How do I change my DNS settings?

Block and unblock websites with parental controls on Firefox

How to stay safe on the web

Site Information panel

Open a new private tab in Firefox Focus for Android

How do I know the status of my sync?

Manage your logins with the Firefox Password Manager

How Firefox Sync keeps your data safe even if TLS fails

DNS over HTTPS (DoH) FAQs

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

Thunderbird Telemetry

Create an email mask through Firefox Relay

Mozilla VPN - FAQ

Prerequisite for sending an encrypted email message

Disable password saving in Firefox

Global Privacy Control in Firefox for Android

Digitally Signing and Encrypting Messages

Clear your browsing history in Firefox for Android

Safe browsing in Firefox Focus

Primary Password is replacing Master Password

Telemetry collection - Windows default browser trends

Grant camera access to Firefox for Android

How do I reset Mozilla VPN?

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

What to do after a data breach

HTTPS-Only Mode in Firefox Focus for Android

Total Cookie Protection and website breakage FAQ

Automatic Conversion of Google mail accounts to OAuth 2.0 Authentication

Safari Integration in Firefox Focus for iOS

Recommended Firefox privacy and security settings for families

How do I monitor multiple email addresses?

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

Data Loss Prevention

Thunderbird Mobile Telemetry

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

HTTPS-First upgrades to secure connections

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 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

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

Tracking Protection on Firefox Focus for iOS

Block cookies in Firefox Focus for Android

How do you use Adjust in Firefox?

Add trusted websites to your allow list in Firefox Focus

Tracking Protection in Firefox Preview

"Certificate cannot be trusted" warning in Kazakhstan

Browsing history in Firefox - View the websites you have visited

Telemetry collection and deletion

My privacy settings were changed from Custom to Standard

Compatibility with Exploit protection on Windows

Disable email forwarding - Stop receiving emails sent through your masks

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

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

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

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

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?

How do I report an issue with Firefox Relay?

Resolve breaches with Mozilla Monitor

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

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

Privacy-Preserving Attribution

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

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