https://geek-code.ru/kak-poluchit-spisok-lyudej-repostnuvshih-zapis-v-facebook.html

facebook-users-parser.js

var result       = "\n";

var INTERVAL = window.setInterval(function() {
      window.clearInterval(INTERVAL);
      var items = document.querySelectorAll('#repost_view_dialog .userContentWrapper');
      for (var i=0; i < items.length; ++i)
      {
        var account = items[i].querySelector('.fwb.fcg > a');
        result += account.textContent + '\n';
      }

      console.log(result);
}, 700);