Privacy and security | Firefox Help (original) (raw)
Tracking protection
Enable tracking protection to enhance your privacy.
Cookies - Information that websites store on your computer
Learn what "cookies" are, how websites use them, and how you can manage the cookies that Firefox stores.
FirefoxFirefox 
Last updated: 9/13/25
Enhanced Tracking Protection in Firefox for desktop
Enhanced Tracking Protection in Firefox automatically protects your privacy as you browse.
FirefoxFirefox Last updated: 2 weeks ago
Introducing Total Cookie Protection in Standard Mode
Firefox users now have access to Total Cookie Protection by default. Find all you need to know about it in this article.
FirefoxFirefox Last updated: 5/20/25
How to clear the Firefox cache
The Firefox cache temporarily stores parts of websites you visit. Learn how to clear it to fix issues with how websites work or look.
FirefoxFirefox Last updated: 2 weeks ago
Global Privacy Control
How to make Firefox advise websites that you visit not to sell or share your browsing information.
FirefoxFirefox Last updated: 3 weeks ago
Trackers and scripts Firefox blocks in Enhanced Tracking Protection
Learn how Firefox blocks common trackers and harmful scripts, to reduce the ability of third parties to collect data about your browsing.
FirefoxFirefox Last updated: 3 weeks ago
Clear cookies and site data in Firefox
Learn how to delete cookies that store website preferences and login status, remove site data and clear cached web content in Firefox.
FirefoxFirefox Last updated: 2 weeks ago
Firefox's protection against fingerprinting
Fingerprinting Protection in Firefox protects you from websites that try to identify you based on a set of unique characteristics.
FirefoxFirefox Last updated: 11/4/25
Third-party cookies and Firefox tracking protection
Some advertisers use third-party (cross-site) cookies to track your visits to the various websites on which they advertise. Learn more.
FirefoxFirefox Last updated: 5/13/25
SmartBlock for Enhanced Tracking Protection
SmartBlock lets pages load more fully, with less breakage – all while keeping those tracking scripts blocked.
FirefoxFirefox Last updated: 4/13/25
Websites say cookies are blocked - Unblock them
This article describes how to troubleshoot problems that involve websites reporting that cookies are blocked or disabled.
FirefoxFirefox Last updated: 3/3/26
Block websites from storing cookies and site data in Firefox
Cookies and site data are stored on your computer by websites you visit. Learn how to block websites from storing this data in Firefox.
FirefoxFirefox Last updated: 3/4/26
Oblivious HTTP (OHTTP) explained
One of the technologies used in Firefox to enhance online privacy is Oblivious HTTP (OHTTP). Learn what it is, how it works and how it helps protect your data.
Firefox, Firefox for Android, Firefox for iOSFirefox, Firefox for Android, Firefox for iOS Last updated: 3/5/26
Forget button - quickly delete your browsing history on Firefox
Make Firefox "Forget" your recent browsing history for a specified time period while leaving the rest alone. All it takes is a few clicks.
FirefoxFirefox Last updated: 10/13/24
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.
FirefoxFirefox Last updated: 10/11/24
Block cookie banners on Firefox
To address frustrations caused by cookie banners on websites, Firefox version 120 introduces a cookie banner blocker. Learn how it works.
FirefoxFirefox Last updated: 5/23/25
Enable and disable cookies that websites use to track your preferences
Websites store things like your preferences, login status, and trackers in "cookies" on your computer. Learn how to manage cookies in Firefox.
FirefoxFirefox Last updated: 12/27/19
Firefox Homepage Lift Studies
Learn how optional sponsored shortcuts on the Firefox homepage support Mozilla, respect your privacy, and how effectiveness is measured without tracking.
FirefoxFirefox Last updated: 11/29/25
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