Tired of clicking the reload button? Page Update Checker (aka PUC -- pronounced "Puke") is a FireFox extension that will automatically check to see if web pages have changed/updated.
How to Use:
Once installed, you will be able to right-click on any page in Firefox and select "Monitor for Updates." The PUC options will open up and you can select how often you would like PUC to download the webpage and see if it has changed. To return to the options menu later, select "Tools" -> "Page Update Checker Options..."