https://addons.mozilla.org/en-US/firefox/addon/3863

"Automate Firefox. Record and replay repetitious work. If you love the Firefox web browser, but are tired of repetitive tasks like visiting the same sites every days, filling out forms, and remembering passwords, then iMacros for Firefox is the solution you’ve been dreaming of! ***Whatever you do with Firefox, iMacros can automate it.***"