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 soluti...
As of Firefox 33, Venkman *no longer works*, as the APIs which it needs have been removed.
The greatest user script engine on the Internet (a fork of Greasemonkey).
Pretty-prints JSON content in the browser for easy, unobtrusive viewing.
Gives a possibility to create custom toolbarbuttons...
A suite of tools for developers.
An extension that allows for the use of dynamic commands in Firefox.