infiniteScroll.bookmarklet.js

javascript:(function(){

  var previousScroll;
  var scrollInterval;
  var nextPageTimeout;

  function scrollAndCheck() {
    previousScroll = window.scrollY;
    window.scrollBy(0, 3000);

    var currentScroll = window.scrollY;
    var maxScroll = document.body.scrollHeight - window.innerHeight;

    clearTimeout(nextPageTimeout);
    nextPageTimeout = setTimeout(function () {
      if (currentScroll + 10 >= maxScroll && previousScroll == currentScroll) {
        clearInterval(scrollInterval);
      }
    }, 10000);

  }

  scrollInterval = setInterval(scrollAndCheck, 1200);

})();