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