Protect your privacy
Keep your information safe from prying eyes with the latest privacy and security features.
Common Myths about Private Browsing
Learn more about common misconceptions about Private Browsing in Firefox.
Avoid and report Mozilla tech support scams
Mozilla does not provide telephone support and does not charge for software downloads, upgrades or technical help. Learn more.
Third-party trackers
Learn about cross-site cookies, which are used on many websites.
Choose a strong password
How to choose a strong password for Firefox accounts.
Enhanced Tracking Protection in Firefox for desktop
Enhanced Tracking Protection in Firefox automatically protects your privacy while you browse.
HTTPS-Only Mode in Firefox
Learn more about HTTPS-Only Mode which forces all connections to websites to use HTTPS.
How do I turn on the Do Not Track feature?
Firefox lets you tell websites not to track your browsing behavior. Learn what tracking is and how to turn on the "Do Not Track" feature.
Trackers and scripts Firefox blocks in Enhanced Tracking Protection
Blocks many common trackers and harmful scripts and reduces the ability of third parties to collect data about your browsing behavior
SmartBlock for Enhanced Tracking Protection
SmartBlock lets pages load more fully, with less breakage -- all while keeping those tracking scripts blocked.
Insecure password warning in Firefox
Firefox issues an insecure password warning when a web page's login form is not secure and your information could be stolen.
Does Firefox share my location with websites?
Learn what information Firefox sends to web sites about your location and how to use and manage location-aware features of your browser.
Firefox Password Manager - Alerts for breached websites
Firefox's password management will show you alerts about logins potentially exposed in data breaches and passwords that may be vulnerable.
Mixed content blocking in Firefox
Firefox automatically blocks insecure or mixed content from secure web pages. We'll explain what that means and what options you have.
How does built-in Phishing and Malware Protection work?
Firefox contains built-in Phishing and Malware Protection to help keep you safe online. This article explains how they work.
Secure your Firefox Account with two-step authentication
Protect your account with two-step authentication.
Firefox Monitor - Frequently asked questions
Frequently-asked questions for Firefox Monitor.
How do I tell if my connection to a website is secure?
Firefox uses a padlock icon next to a website's URL to let you know your connection is encrypted. Click on the icon for more information.
Delete browsing, search and download history on Firefox
Learn what information is stored in your Firefox history and how to clear all or part of it if you are using a public or shared computer.
Private Browsing - Use Firefox without saving history
Firefox Private Browsing is great for viewing websites without saving things such as cookies, temp files, and a history of the pages you visit.
Secure website certificate
Websites can present Firefox with a certificate to identify themselves. Find out how Firefox checks the authenticity of the sites you visit.
My sign in was “blocked for security reasons” on Firefox Accounts
Firefox Accounts blocks sign in attempts if it detects unusual activity. Learn how to unblock your account.
Site Information panel
The Site Information panel in Firefox tells you about a website's connection security and identity. Learn more.
Autofill logins on Firefox
Firefox lets you control whether or not to autofill your logins and passwords.
How to stop Firefox from making automatic connections
Learn about the various reasons why Firefox makes automatic connections to the Internet and how you can stop it from doing so if you wish.
How Firefox securely saves passwords
Learn how Firefox securely saves your passwords.
Protecting Privacy while using Web Authentication
Learn about Web Authentication, a powerful anti-phishing technology.
Firefox Monitor
Firefox Monitor empowers users to fight against data breaches by alerting users when they visit a previously breached website.
Total Cookie Protection and website breakage FAQ
Learn about Enhanced Tracking Protection and Total Cookie Protection in Firefox, and how to troubleshoot and report possible site breakage.
Firefox privacy and security features
Check Firefox's most advanced features and settings for safe, private online browsing.
Share data with Mozilla to help improve Firefox
The Telemetry feature sends us performance and usage data to help measure how Firefox behaves in the real world and improve it. Learn more.
How to stay safe on the web
There are many scams, viruses and other dangers out in the Web. Take these simple steps to protect your computer and personal information.
About Firefox Desktop Attribution
When you download and install Firefox a "download token" is used, so Mozilla can identify how you reached the download page. Learn more.
How is Facebook Container different from Multi-account Containers?
The difference between Facebook Container and Multi-Account Containers
How do I share Firefox between people on a computer?
Firefox can be used by several people on a single computer. Learn the basic protections to prevent others form accessing your private data.
Using a Primary Password with Sync
Learn how to use Sync in Firefox with a Primary Password (formerly known as a “Master Password”) for extra protection.
Mozilla Rally - Managing Account Data
Learn more about how your data is used when you choose to participate in Mozilla Rally.
Suspicious activity on my Firefox account
How to protect yourself if suspicious activity is detected on your Firefox account.
"Certificate cannot be trusted" warning in Kazakhstan
Firefox is blocking the use of Kazakhstan root CA certificate to protect your privacy. Learn more about how to stay safe.
My privacy settings were changed from Custom to Standard
If your Custom settings match the settings in Standard, you will be switched back to Standard. This will not affect your settings.
Firefox asks for authentication (password, voice, face or fingerprint) when accessing passwords
Learn more about this Firefox anti-snooping feature designed to protect your logins and passwords from unauthorized access.
About Mozilla Rally
Learn more about how to participate in studies.
