Comcast online chat support service refusing to scroll to the bottom of the chat content div automatically when messages arrive from the "analyst" (might just be a Chrome bug, I'm not sure)? Paste the (admittedly simplistic) script into the js console, so you can focus back onto the real task at hand.

Fix Comcast Support Chat

(function (window, jQuery) {
  var div = document.getElementById("ChatOutput");
  function fixIt() {
    div.scrollTop = div.scrollHeight;
  }
  if (div) {
    window.setInterval(fixIt, 100);
  }
})(window, jQuery);