I want to report the same problem as in http://community.norton.com/t5/Norton-Online-Family/Norton-Online-Family-not-blocking-Facebook/td-p/715826.
I have to start this new post because I just could not figure out how to add/reply to that topic. KatieQ asked the original poster a question but I have not seen a response, and I could only reply to it here in a new post (the reply button is not clickable).
I use Google chrome. Originally it did block (by category), then it is no longer blocked. I then entered the specific web site to the block list and made sure that the rules are saved, and then updated on my son's computer.
I entered "www.facebook.com", "facebook.com", "https://www.facebook.com", "http://www.facebook.com" but they all resolve to the same one "facebook.com" saved in the list.