This simple Firefox addon (Desktop + Mobile) loads any number of pages you specified in its settings, waiting N seconds before each next load (N is configurable in settings, too, 20 being its default value).
Useful for monitoring Twitter/Facebook/Livejournal timelines w/o the need to manually prompt page reload. Expecially good for mobile devices standing on a stander next to your cappucino cup in a coffeshop. We believe that constantly hitting Refresh button is dumb and must be avoided.
Cyclic reloading stops if you visit any page not specified in page list, so this addon is fully unobtrusive, even when it is enabled.
Feel free to bugfix/improve on Github: https://github.com/dmitri777/cycloader