Third-party cookies and Firefox tracking protection

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Third-party cookies are cookies set by a website other than the one you are currently on. For example, cnn.com might have a Facebook like button on their site. The like button will set a cookie that can be read by Facebook. That would be 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 cross-site tracking.

Note: Cross-site tracking cookies are now disabled by default for all Firefox users. See Enhanced Tracking Protection for more information about how Firefox protects you against tracking.

When third-party cookies are disabled, it can stop some, but not all types of tracking. If you are concerned about tracking, see also:

Disable third-party cookies

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

  1. In the Menu bar at the top of the screen, click Firefox and select Preferences.Click the menu button Fx89menuButton and select Settings.
  2. Select the Privacy & Security panel.
  3. Under Enhanced Tracking Protection, select the Custom radio button.
  4. Check Cookies and use the drop-down menu to select the types of cookies you wish to block. The default setting is Cross-site tracking cookies — includes social media cookies.
    Fx102settings-ETPcustom
    • To block all third-party cookies, select All third-party cookies (may cause websites to break) from the drop-down.
  5. Select the reload all tabs retina button (shown when multiple tabs are open) to apply your new setting.
Note: Firefox also includes Total Cookie Protection, which creates a “cookie jar” for every website. This feature keeps cookies in the site where they were created so that they can't track you across websites. Total Cookie protection is enabled when the Cross-site tracking cookies, and isolate other cross-site cookies setting is selected.

Enable third-party cookies for specific sites

Some websites may not work properly when third-party cookies are blocked. To turn off Enhanced Tracking Protection for a specific website:

  1. Visit the website.
  2. Click on the shield Fx89ShieldIcon to the left of the address bar.
    Fx91ETPtoggle-on
  3. Toggle the switch Fx91ETPbluetoggle at the top of the panel. This will turn off Enhanced Tracking Protection for this site.
    The page will reload automatically and allow trackers on this site only.
    Fx91SiteFixedSendReport

Follow the same process to turn Enhanced Tracking Protection back on.

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