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You can set which Firefox extensions can run in private windows and which can't, when you install the extension or later on. Learn more.

This article explains how to set which [[Find and install add-ons to add features to Firefox#w_what-types-of-add-ons-can-i-install|extensions]] are allowed to run in [[Private Browsing - Use Firefox without saving history|Private Browsing]] windows. '''Note:''' Not all extensions can be allowed in private windows. __TOC__ =Extensions in private windows= An extension that runs in private browsing windows could be problematic if it has access to information you would rather keep private. Firefox lets you decide which extensions are allowed to run in private windows. Additionally, an extension is not enabled for private browsing by default. You must grant it permission, either during installation or later through the extension's settings. If you do not give an extension permission to run in private browsing, it should still work normally in non-private browsing, unless the extension explicitly uses features that require private browsing access (like opening new tabs in a private window). =Granting permission on installation= {for fx131} When you install a new extension, you will see a prompt asking for permission to add the extension and whether to allow it to run in private windows. ;[[Image:permissions request on desktop]] *If you would like the extension to work in private browsing, click on the box next to ''Run in Private Windows'' to add a check mark and then click on the {button Add} button. *If you do not want the extension to have access to your data in private browsing windows, leave the box unchecked. {/for} {for not fx131} After you install a new extension, you will see a prompt notifying you that the extension was added and asking whether to allow it to run in private windows. ;[[Image:Fx128ExtensionAdded-PrivateWindowsPrompt]] *If you would like the extension to work in private browsing, click on the box next to ''Allow this extension to run in Private Windows'' to add a check mark and then click on the {button Okay} button. *If you do not want the extension to have access to your data in private browsing windows, leave the box unchecked. {/for} =Enabling or disabling extensions in private windows = #[[Template:openextensions]] #Click on the extension that you would like to manage. #*This will open a panel where you can manage extension settings. [[Image:Fx131ManageExtensions-PrivateWindows]] Next to ''Run in Private Windows'', select {menu Allow} to enable the extension to work in private browsing or select {menu Don’t Allow} to disable it in private browsing. Once you have made your selection, you can exit the Add-ons Manager.