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). You must grant it permission, either during installation or later through the extension's settings. Additionally, an extension is not enabled for private browsing by default. Firefox lets you decide which extensions are allowed to run in private windows.
4 Enabling or disabling extensions in private windowsĪn extension that runs in private browsing windows could be problematic if it has access to information you would rather keep private.3 Enabling or disabling extensions in private windows.
