I have a pfSense Sg-2100 security appliance in place, with adam:ONE enabled. I am using “allow only the good” with my own Whitelist added. I can see slack.com, but there are no graphics. It looks like the old list server style. Just a bunch of hyper-links.
Also, for the centurylink.net domain, the web browser just sits there in a completely blank, white screen. It never makes any connection, so I cannot click on the “Unblock” request, since it never shows up.