ReloadEvery is a Add-on that provides auto refresh feature in Firefox. This is an useful add-on if you are looking to constantly refresh your web page. And instead of manually reloading the page you can set your preferred time interval for reloading the page.
Click the Tools menu and select Add-ons from the menu list.
Then search for “ReloadEvery” using the Search all add-ons text box and Install the add-on.
Auto Refresh Time Interval
The default refresh time interval is set to 10 seconds and you can change reload time interval using the option provided as part of context menu.
This is also provides the option of defining custom time interval and randomized tim interval.