I don't really use facebook anymore so couldn't care less; but so happened to log in today to change my password and saw this on my front page.
I actually got a notice like this several months ago even before YouTube did theirs.
If anything, Facebook's quite infamous for trying to combat and blockers in general. I remember back then when they obfuscated their web layout so much that it got tricky for some to filter or block sponsored or recommended content.