This web extension requires some configuration before enabling it to ensure the cookies and other browsing site data you want to keep is configured. All other non-configured items are removed, as that is the primary function of this web extension. If you want to only delete cookies from private browsing mode, add a wildcard '*' whitelist entry for all other containers.

While we are able to delete a few items from Private Windows, you will need to ensure you allow this web extension to operate in Private Browsing mode.