1. In the Menu bar at the top of the screen, click Firefox and then select Preferences or Settings, depending on your macOS version.Click the menu button and select Settings.
2. Select the Privacy & Security panel and go to the Cookies and Site Data section.
3. Select Accept cookies and site data from websites (recommended) to enable cookies. To disable cookies, select Block cookies and site data (may cause websites to break).

   

   • If you are troubleshooting problems with websites, make sure that Accept third-party cookies and site data is NOT set to Never. For more information, see Third-party cookies and Firefox tracking protection.
4. Choose how long cookies are allowed to be stored:
   • Keep until:
     they expireThey expire: Each cookie will be removed when it reaches its expiration date, which is set by the site that sent the cookie.
     I close FirefoxFirefox is closed: The cookies that are stored on your computer will be removed when Firefox is closed.
5. Close the Settings page. Any changes you've made will automatically be saved.

1. In the Menu bar at the top of the screen, click Firefox and then select Preferences or Settings, depending on your macOS version.Click the menu button and select Settings.
2. Select the Privacy & Security panel and go to the Cookies and Site Data section.

   

3. Select Accept cookies and site data to enable cookies. To disable cookies, select Block cookies and site data and use the drop-down menu next to Type blocked to choose the type of cookies to block.
   • If you are troubleshooting problems with websites, make sure that Accept third-party cookies and site data is NOT set to Never. For more information, see Third-party cookies and Firefox tracking protection.
4. Choose how long cookies are allowed to be stored:
   • Keep until:
     They expire: Each cookie will be removed when it reaches its expiration date, which is set by the site that sent the cookie.
     Firefox is closed: The cookies that are stored on your computer will be removed when Firefox is closed.
5. Close the Settings page. Any changes you've made will automatically be saved.

Click the menu button The image "fx57menu" does not exist. and select Content Blocking. The Privacy & Security panel of Firefox Settings will open. This is where you can view your settings for Content Blocking, which includes cookies.

The image "fx65ContentBlocking" does not exist.

• If Standard is selected, it means that you are using the default settings for content blocking and cookies are enabled.

To block cookies: Select Custom and check mark Cookies.

Third-Party Trackers is the default setting for blocking cookies. Use the drop-down menu to change the type of cookies blocked. Note that disabling cookies can cause problems with websites. See this article to learn more about third-party cookies.

To enable all cookies, do one of the following:

• Select Custom and clear the Cookies check mark.
• Alternatively, select Standard to restore the default settings.

To learn more about these settings, see the Content blocking article.

Clear cookies when you close Firefox

To remove all cookies and site data when Firefox is closed:

1. The template "OptionsPreferences" does not exist or has no approved revision.
2. Select the Privacy & Security panel and go to the Cookies and Site Data section.

   

3. Check mark Delete cookies and site data when Firefox is closed.

Each time you close Firefox, the cookies that are stored on your computer will be removed.