JavaScript

by Zulkarnain K.

25 Add-ons in this Collection

iMacros for Firefox by Ipswitch, Inc.

Rated 4 out of 5 stars 572 reviews

465,892 users

Automate Firefox. Record and replay repetitive tasks. If you're tired of manually visiting the same sites, filling out forms, downloading files and extracting data, then iMacros is for you! Save time, effort and money with iMacros browser automation!

Greasemonkey by Anthony Lieuallen, Aaron Boodman, others

Rated 4 out of 5 stars 1,228 reviews

856,182 users

Customize the way a web page displays or behaves, by using small bits of JavaScript.

JavaScript Debugger by James Ross, Robert Ginda, others

Rated 4 out of 5 stars 50 reviews

76,732 users

As of Firefox 33, Venkman *no longer works*, as the APIs which it needs have been removed.

Venkman is the code name for Mozilla's JavaScript Debugger. Venkman aimed to provide a powerful JavaScript debugging environment for Mozilla based browsers.

JavaScript Deobfuscator by Wladimir Palant

Rated 5 out of 5 stars 26 reviews

30,538 users

This add-on shows you what JavaScript code runs on a web page, even if it is obfuscated and generated on the fly. Simply open JavaScript Deobfuscator from the Web Developer menu and watch the scripts being compiled/executed.

Scriptish by Erik Vold, Nils Maier, others

Rated 4 out of 5 stars 110 reviews

26,736 users

The greatest user script engine on the Internet (a fork of Greasemonkey).

PrefBar by Manuel Reimer

Rated 5 out of 5 stars 38 reviews

11,092 users

The all in one toolbar(item). Houses and manages bigger amounts of buttons (Clear Cache, Clear Cookies, ...), Menus (User Agent spoof...) and checkboxes (Javascript, Flash, ...). Extensible from online-database or with self created buttons.

Custom Buttons by Yan, cubegm, others

Rated 4 out of 5 stars 121 reviews

6,348 users

Gives a possibility to create custom toolbarbuttons...

Ubiquity by matyr

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Experimental

Rated 5 out of 5 stars 118 reviews

604 users

An extension that allows for the use of dynamic commands in Firefox.

Execute JS by Rudolf Noe

Rated 5 out of 5 stars 15 reviews

3,030 users

Execute JS is a enhanced JavaScript-Console, where you can comfortably enter and execute arbitrary JavaScript-Code and modify functions...

Developer Assistant by Ted Mielczarek, Gavin Sharp, others

Rated 4 out of 5 stars 46 reviews

1,451 users

A suite of tools for developers.

JSONovich by Will Elwood, mjgiarlo

Rated 4 out of 5 stars 43 reviews

4,603 users

Pretty-prints JSON content in the browser for easy, unobtrusive viewing.

JavaScript Terminal by Paul Rouget

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Experimental

Rated 4 out of 5 stars 5 reviews

1,455 users

JavaScript Terminal for Firefox.

Mozilla Labs - Jetpack Prototype by Mozilla Labs

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Experimental

Rated 4 out of 5 stars 27 reviews

37 users

Jetpack Prototype is an experiment in making it easy to build Firefox add-ons using common web technologies.

dotjs by Ricky Rosario

dotjs is a Firefox Add-on that executes JavaScript files in `~/.js` based on their filename and the domain of the site you are visiting.

uc by matyr

Rated 5 out of 5 stars 14 reviews

834 users

A userChromeJS clone with built-in subscript/overlay loader capability.
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