How do you block Facebook on a TD-W8960N.

We have been told that "Parent Control doesn’t support https websites.
In some areas, when you browser www.google.com in the web browser, it may automatically changes to https://www.google.com;
in this case, Parent Control takes no effect for google website, because it's a https website now.

Faceook and icloud will automatically change to https website. So it may still can be accessed.

When I asked if TP-Link has a router that overcomes this they say the do not have one.

Does anyone have an answer to this?

Thanks