If you’re on a frequently-updated webpage (like twitter.com or search.twitter.com), and have to reload it often to see the changes, you might find it slightly annoying.
Go to pagereboot.com, type in the URL and set the time for auto-refresh. The site shows up and reloads automatically according to the time interval you specified. There’s also a bookmarklet you can use to transfer the current webpage you’re on to Page Reboot for auto-refresh.
Page Reboot [Reloads Web Pages Automatically Every Few Seconds]