JavaScript

by Zulkarnain K.

11 Add-ons in this Collection

JavaScript Debugger by James Ross, Robert Ginda, others

Rated 4 out of 5 stars 52 reviews

51,215 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.

PrefBar by Manuel Reimer

Rated 5 out of 5 stars 42 reviews

8,642 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 124 reviews

4,390 users

Gives a possibility to create custom toolbarbuttons...

Scriptish by Erik Vold, Nils Maier, others

Rated 4 out of 5 stars 109 reviews

14,296 users

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

Execute JS by Rudolf Noe

Rated 5 out of 5 stars 15 reviews

1,658 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

876 users

A suite of tools for developers.

JavaScript Object Examiner by Chuck_Baker

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Experimental

Not yet rated

244 users

Display JavaScript object methods and properties for any available scope.

Mozilla Labs - Jetpack Prototype by Mozilla Labs

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Experimental

Rated 4 out of 5 stars 27 reviews

18 users

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

XPCOMViewer by Ondřej Doněk

Rated 4 out of 5 stars 6 reviews

89 users

XPCOMViewer is tiny tool for exploring XPCOM components.

JSON Inspector by Zulkarnain K.

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Experimental

Not yet rated

90 users

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

Custom Buttons² by SCClockDr, nicholasalipaz, others

Rated 4 out of 5 stars 75 reviews

54 users

The Custom Buttons² Firefox extension provides the code base support necessary to create, maintain, import, and export custom toolbar buttons. The buttons can perform just about any task, with a large number of buttons already available on the exte...

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