Learn more about common misconceptions about Private Browsing in Firefox.
Mozilla does not provide telephone support and does not charge for software downloads, upgrades or technical help. Learn more.
Enhanced Tracking Protection in Firefox automatically protects your privacy while you browse.
How to choose a strong password for Firefox Accounts.
Protect your account with two-step authentication.
Websites can present Firefox with a certificate to identify themselves. Find out how Firefox checks the authenticity of the sites you visit.
Firefox issues an insecure password warning when a web page's login form is not secure and your information could be stolen.
Firefox automatically blocks insecure or mixed content from secure web pages. We'll explain what that means and what options you have.
Learn what information Firefox sends to web sites about your location and how to use and manage location-aware features of your browser.
Learn more about HTTPS-Only Mode which forces all connections to websites to use HTTPS.
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.
Learn about cross-site cookies, which are used on many websites.
Firefox Accounts blocks sign in attempts if it detects unusual activity. Learn how to unblock your account.
Blocks many common trackers and harmful scripts and reduces the ability of third parties to collect data about your browsing behavior
SmartBlock lets pages load more fully, with less breakage -- all while keeping those tracking scripts blocked.
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.
There are all kinds of scams, viruses and other dangers out in the web. Take these simple steps to protect your computer and personal information.
Firefox contains built-in Phishing and Malware Protection to help keep you safe online. This article explains how they work.
The Site Information panel in Firefox tells you about a website's connection security and identity. Learn more.
When you download and install Firefox a "download token" is used, so Mozilla can identify how you reached the download page. Learn more.
Frequently-asked questions for Firefox Monitor.
Learn more about how your data is used when you choose to participate in Mozilla Rally.
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.
Firefox Private Browsing is great for viewing websites without saving things such as cookies, temp files, and a history of the pages you visit.
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.
The Telemetry feature sends us performance and usage data to help measure how Firefox behaves in the real world and improve it. Learn more.
Firefox can be used by several people on a single computer. Learn the basic protections to prevent others form accessing your private data.
How to protect yourself if suspicious activity is detected on your Firefox account.
Learn how to use Sync in Firefox with a Primary Password (formerly known as a "Master Password") for extra protection.
Learn about Web Authentication, a powerful anti-phishing technology.
The difference between Facebook Container and Multi-Account Containers
Firefox Monitor empowers users to fight against data breaches by alerting users when they visit a previously breached website.
Learn how Firefox securely saves your passwords.
Firefox is blocking the use of Kazakhstan root CA certificate to protect your privacy. Learn more about how to stay safe.
Firefox lets you control whether or not to autofill your logins and passwords.
Firefox's password management will show you alerts about logins potentially exposed in data breaches and passwords that may be vulnerable.
If your Custom settings match the settings in Standard, you will be switched back to Standard. This will not affect your settings.
Learn more about this Firefox anti-snooping feature designed to protect your logins and passwords from unauthorized access.
How to create an email mask on Firefox Relay.
Learn more about how to participate in studies.
Learn about Enhanced Tracking Protection and Total Cookie Protection in Firefox, and how to troubleshoot and report possible site breakage.
Check Firefox's most advanced features and settings for safe, private online browsing.