Loads new Tweets on Twitter if you are at the top of the page. Will not load new tweets if you are below the 'new tweets' link.
This will automatically click on the load new tweets but only if you are at the top of the page. Many of the other extensions will always click on it which causes you to scroll back to the top of the screen. This one takes into account where you are at the page and will only "click" the load link when you are at the top.