To add a new site, enter an unique title/domain (without www.) and select options for Googlebot/block Javascript (block on (sub)domain(s) of site and/or external domains).
Custom sites are enabled automatically in options (cookies will be removed by default).

List of custom sites

* already in default list (double domain)

Json file

You can edit/sort the text area and save (only when json-text is valid). Clear & save to reset. You can also export/import json-text for new installations.