Tertiary-party cookies are cookies set by a website other than the one you are currently on. For instance, cnn.com might have a Facebook like button on their site. The like button will ready a cookie that tin be read by Facebook. That would exist considered a third-party cookie. Some advertisers use these types of cookies to track your visits to the various websites on which they advertise. This is called cantankerous-site tracking.

Note: Cantankerous-site tracking cookies are now disabled by default for all Firefox users. Encounter Enhanced Tracking Protection for more data nearly how Firefox protects y'all confronting tracking.

When third-political party cookies are disabled, information technology tin can finish some, but not all types of tracking. If you are concerned about tracking, encounter too How do I turn on the Do Non Runway feature?, Enhanced Tracking Protection in Firefox for desktop and Trackers and scripts Firefox blocks in Enhanced Tracking Protection.

Disable third-party cookies

To block cross-site trackers or all third-political party cookies:

In the Carte du jour bar at the top of the screen, click and select . Click the carte button and select . Click the menu button and select .
Select the console.
Under Enhanced Tracking Protection, select the Custom radio button.
Cheque Cookies and use the drop-down menu to select the types of cookies you wish to block.
- Cantankerous-site and social media trackers Cross-site tracking cookies — includes social media cookies is the default setting.
- To block all third-political party cookies, select All third-party cookies from the drop-downward.
Close the about:preferences folio. Any changes you've fabricated volition automatically be saved.

Firefox too includes Total Cookie Protection in Strict Mode and Private Browsing Mode, which creates a "cookie jar" for every website. This keeps cookies in the site where they were created and then that they tin't track yous across websites.

Enable third-party cookies for specific sites

Some websites may not work properly when tertiary-political party cookies are blocked, even with the default setting Cross-site and social media trackers Cantankerous-site tracking cookies — includes social media cookies .

To turn off Enhanced Tracking Protection for a specific website:

Visit the website.
Click on the shield to the left of the address bar.
Toggle the switch at the top of the console. This will turn off Enhanced Tracking Protection for this site. The page will reload automatically and permit trackers on this site only.