JavaScript

by Zulkarnain K.

25 Add-ons in this Collection

Greasemonkey by Anthony Lieuallen, Aaron Boodman, others

Rated 4 out of 5 stars 972 reviews

1,283,849 users

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

iMacros for Firefox by iMacros

Rated 4 out of 5 stars 391 reviews

549,009 users

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...

JavaScript Debugger by James Ross, Robert Ginda, others

Rated 4 out of 5 stars 50 reviews

127,522 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

59,569 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 114 reviews

76,947 users

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

JSONovich by mjgiarlo, Will Elwood

Rated 4 out of 5 stars 33 reviews

9,516 users

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

PrefBar by Manuel Reimer

Rated 5 out of 5 stars 40 reviews

15,704 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 96 reviews

84,407 users

Gives a possibility to create custom toolbarbuttons...

Execute JS by Rudolf Noe

Rated 5 out of 5 stars 13 reviews

5,844 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

3,135 users

JavaScript Terminal for Firefox.

Developer Assistant by Ted Mielczarek, Gavin Sharp, others

Rated 4 out of 5 stars 46 reviews

3,207 users

A suite of tools for developers.

Ubiquity by matyr

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Experimental

Rated 5 out of 5 stars 122 reviews

1,351 users

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

uc by matyr

Rated 5 out of 5 stars 19 reviews

904 users

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

Javascript Command by max1million

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Experimental

Rated 4 out of 5 stars 13 reviews

1,851 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

1,111 users

Display JavaScript object methods and properties for any available scope.
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