Block websites from storing site preferences or login status in Firefox

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Cookies are stored on your computer by websites you visit and contain information such as site preferences or login status. This article describes how to block websites from storing cookies in Firefox.

Block cookies for a single site

To set Firefox to block cookies from one website:

  1. Go to the website you wish to block from setting cookies in Firefox.
  2. Right-clickHold down the Ctrl key while you click within the page and select View Page Info.
  3. In the Page Info window, select the Permissions panel.
  4. Underneath Set Cookies, remove the check mark from Use Default.
  5. Change the setting to Block. Blocking Cookies - Win1
  6. Close the Page Info window.
  7. Remove any cookies that the website has already set in Firefox. For instructions, see Delete cookies to remove the information websites have stored on your computer.

Viewing a list of blocked sites

To see a list of sites that you have blocked from setting cookies:

  1. At the top of the Firefox window, click on the Firefox button and then select OptionsAt the top of the Firefox window, click on the Tools menu and then select OptionsOn the menu bar, click on the Firefox menu and select Preferences...At the top of the Firefox window, click on the Edit menu and select Preferences

    Click the menu button New Fx Menu and choose OptionsPreferences

    .
  2. Select the Privacy panel.

  3. Set Firefox will: to Use custom settings for history. Custom History Fx 5 - Win Custom History - Mac Custom History - Linux Custom History Fx21 WinXP Custom History Fx21 Win7 Custom History Fx21 Mac Custom History Fx21 Linux
  4. Next to Accept cookies from sites, click Exceptions….

Block cookies for all sites

To set Firefox to block cookies from all websites:

  1. At the top of the Firefox window, click on the Firefox button and then select OptionsAt the top of the Firefox window, click on the Tools menu and then select OptionsOn the menu bar, click on the Firefox menu and select Preferences...At the top of the Firefox window, click on the Edit menu and select Preferences

    Click the menu button New Fx Menu and choose OptionsPreferences

    .
  2. Select the Privacy panel.
  3. Set Firefox will: to Use custom settings for history.
  4. Remove the check mark from Accept cookies from sites.
  5. Click OK to close the Options windowClick Close to close the Preferences windowClose the Preferences window .

To remove cookies that were stored previously, see Delete cookies to remove the information websites have stored on your computer.

Block third party cookies

To set Firefox to accept cookies only from the website you're currently visiting, see Disable third-party cookies in Firefox to stop some types of tracking by advertisers.



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