JavaScript

by Zulkarnain K.

25 Add-ons in this Collection

Greasemonkey by Anthony Lieuallen, Aaron Boodman, others

Rated 4 out of 5 stars 1,019 reviews

1,266,956 users

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

iMacros for Firefox by Ipswitch

Rated 4 out of 5 stars 431 reviews

585,944 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!

JavaScript Debugger by James Ross, Robert Ginda, others

Rated 4 out of 5 stars 49 reviews

117,982 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 20 reviews

52,021 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 119 reviews

62,320 users

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

PrefBar by Manuel Reimer

Rated 5 out of 5 stars 40 reviews

16,691 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 113 reviews

64,991 users

Gives a possibility to create custom toolbarbuttons...

JSONovich by mjgiarlo, Will Elwood

Rated 4 out of 5 stars 38 reviews

9,599 users

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

Execute JS by Rudolf Noe

Rated 5 out of 5 stars 13 reviews

5,352 users

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

JavaScript Terminal by Paul Rouget

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Experimental

Rated 4 out of 5 stars 5 reviews

2,548 users

JavaScript Terminal for Firefox.

Developer Assistant by Ted Mielczarek, Gavin Sharp, others

Rated 4 out of 5 stars 46 reviews

2,838 users

A suite of tools for developers.

uc by matyr

Rated 5 out of 5 stars 21 reviews

1,358 users

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

Ubiquity by matyr

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Experimental

Rated 5 out of 5 stars 127 reviews

1,355 users

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

Javascript Command by max1million

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Experimental

Rated 4 out of 5 stars 13 reviews

1,403 users

For writing/testing javascript on Firefox windows (extension development, etc), web pages, and bookmarklets.

JavaScript Object Examiner by Chuck_Baker

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Experimental

Not yet rated

858 users

Display JavaScript object methods and properties for any available scope.
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