Whatever you do with Firefox, iMacros can automate it.iMacros for Firefox is 100% free for private and commercial use.
Useful iMacros for Firefox resources: * iMacros for Firefox User Forum * iMacros Online Demos * iMacros User Manual and Wiki * iMacros for Internet Explorer (this add-ons runs the same macros as iMacros for Firefox) * iOpus Newsletter iMacros for Firefox is featured in the new edition of the Firefox Hacks series (currently available in Japanese only).
iMacros lets you record and replay repetitious work. iMacros programmatically interacts with any and all websites. It fills out forms and automates the download and upload of text, images, files and web pages. You can import or export data to/from using CSV & XML files, databases or any other source to and from web applications. iMacros includes support for PDF handling, taking screenshots, simulating different user agents and connecting to proxy servers. It is the only web automation software that works with every website.