I needed to do the same thing and I found this discussion: https://community.mcafee.com/message/242484#242484 which helped develop my rule. Take a look and see if this can point you in the right direction.
I tried the post you found (https://community.mcafee.com/message/242484#242484) but it didnt work :/
I dont know if because we have a few differences: i´m using MWG 126.96.36.199.0 (Build 15726) and now Facebook is HTTPS and the post is about HTTP. Anyway i tried both (HTTP and HTTPS)
Thanks a lot!
Hi Jon! Hope you´re fine...
I tried with this DOC too, but didn´t work :/
The very strange point is: it works for other HTTPS sites, but not Facebook.
can you share your modified rules (according to the document provided by Jon) again please?