This plugin automatically loads new tweets in Twitter's desktop interface, provided the browser window is scrolled to the top and no popups are open.
This gives Twitter a chatroom-style experience, and does so without confusing or interfering with the user if they're interacting with tweets down the page or with popups, which is a little savvier than any other current Twitter autorefresh plugins.
If you want the page to not autorefresh temporarily, simply scroll down it a little bit or open a popup. When you want it to start autorefreshing again, scroll back to the top, close any popups, and wait a second or so.
Try it out below!