JavaScript

by Zulkarnain K.

25 Add-ons in this Collection

Greasemonkey by Anthony Lieuallen, Aaron Boodman, others

Rated 4 out of 5 stars 1,007 reviews

1,227,050 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 420 reviews

464,977 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 50 reviews

111,336 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

50,492 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

60,955 users

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

PrefBar by Manuel Reimer

Rated 5 out of 5 stars 39 reviews

15,568 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 111 reviews

62,356 users

Gives a possibility to create custom toolbarbuttons...

JSONovich by mjgiarlo, Will Elwood

Rated 4 out of 5 stars 36 reviews

9,250 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

5,126 users

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

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.

Developer Assistant by Ted Mielczarek, Gavin Sharp, others

Rated 4 out of 5 stars 46 reviews

2,735 users

A suite of tools for developers.

JavaScript Terminal by Paul Rouget

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Experimental

Rated 4 out of 5 stars 5 reviews

2,433 users

JavaScript Terminal for Firefox.

uc by matyr

Rated 5 out of 5 stars 19 reviews

1,290 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 125 reviews

1,245 users

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

JSON Inspector by Zulkarnain K.

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Experimental

Not yet rated

336 users

Inspect JSON object from a URL or entered data.
Requires either DOM Inspector or DOM Inspector Plus! [dm] extension.
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