Linking Facebook profile to contacts manually

I do not like to use the automatic sync of Facebook contacts, as I have a lot of friends on there I don't care to have in my contacts list. I have about 75 contacts I have it narrowed down to, and all are stored in iCloud contacts. Problem is, without the automatic sync, the Facebook profile linking doesn't seem to occur properly. If I type in their profile manually, it takes me to the Facebook app, but not to their profile. How do I manually enter it so that it takes me right to their profile the way that the auto sync does?

Thanks