Important notice: If you register for testing, go to your profile settings and to your interests add delete profile. Trying to login with Facebook to my website: I get the following error: URL I have an email address and want to find out if there is a Facebook user linked to this address. If there is, then I want to retrieve the url to this users profile page and save it somewhere. I do. Create an account or log into Facebook. Connect with friends, family and other people you know. Share photos and videos, send messages and get updates. Go to the Graph API Explorer Choose your app from the dropdown menu Click Get Access Token Choose the manage_pages permission (you may need the user_events permission too, not sure) Now access the me/accounts connection and copy your page's access_token Click on your page's id Add the page's access_token to the GET fields Call the connection you want (e.g.: PAGE_ID/events) Facebook has changed how the sharer.php works, as Ibrahim Faour replies to the bug filed with Facebook. The sharer will no longer accept custom parameters and facebook will pull the information that is being displayed in the preview the same way that it would appear on facebook as a post, from the url OG meta tags. 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). I'm developing an Android app and am interested to know how you can update the app user's status from within the app using Android's share intents. Having looked through Facebook's SDK it appears. 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: from my Android app, I would like to open a link to a Facebook profile in the official Facebook app (if the app is installed, of course). For iPhone, there exists the fb:// URL scheme, but trying the I'm sharing content from a website and every time I paste the link into Facebook it says 'page not found'. Sometimes it works when I manually add the 'www.' in front of the URL in the address bar.