Facebook will not allow developers pre-fill messages. Developers may customize the story by providing OG meta tags, but it's up to the user to fill the message. This is only possible if you are posting on the user's behalf, which requires the user authorizing your application with the publish_actions permission. AND even then:, It doesn't work,Browser do not allow to load local files to iframe, if you try to load an html from the server you get "Refused to display ' m.facebook.com ' in a frame because it set 'X-Frame-Options' to 'deny'.", This is in fact the correct answer, was able to extract link with Chrome developer tools through m.facebook, The Facebook SDK for Unity gets the wrong key hash. It gets the key from "C:\Users\"your user".android\debug.keystore" and, in a perfect world, it should get it from the keystore you created in your project., This will make the Facebook Page Plugin responsive, but only on the initial page render, with a minimum width of 180px. I'm still trying to figure out how to make it truly dynamically responsive, in spite of Facebook's caveat (I'll post an update if I ever find the answer)., In my Facebook account, where can I find these application IDs, secret key, all?.