My Favorite Add-ons

by tyll

23 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,767 reviews

2,432,636 users

Firebug integrates with Firefox to put a wealth of development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page...

User Agent Switcher by chrispederick

Rated 4 out of 5 stars 241 reviews

392,453 users

The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.

FoxyProxy Standard by Eric H. Jung, groeg, others

Rated 4 out of 5 stars 335 reviews

327,718 users

FoxyProxy is an advanced proxy management tool that completely replaces Firefox's limited proxying capabilities. For a simpler tool and less advanced configuration options, please use FoxyProxy Basic.

Web Developer by chrispederick

Rated 5 out of 5 stars 209 reviews

599,368 users

The Web Developer extension adds various web developer tools to the browser.

Tamper Data by Adam Judson

Rated 4 out of 5 stars 128 reviews

120,649 users

Use tamperdata to view and modify HTTP/HTTPS headers and post parameters...

FireGestures by Gomita

Rated 4 out of 5 stars 862 reviews

408,225 users

A customizable mouse gestures extension which enables to execute various commands and user scripts with six types of gestures.

Personas Plus by Mozilla

Rated 3 out of 5 stars 951 reviews

433,230 users

Personas are free, easy-to-install "skins" for Firefox. Personas Plus extends that built-in functionality to give you even more control and easier access to new, popular, and your own favorite Personas.

Live HTTP Headers by Daniel Savard, Nikolas Co

Rated 4 out of 5 stars 154 reviews

183,042 users

View HTTP headers of a page and while browsing.

HttpFox by Martin Theimer

Rated 4 out of 5 stars 161 reviews

101,564 users

An HTTP analyzer addon for Firefox

Autofill Forms by Sebastian Tschan, Egor Zindy, others

Rated 3 out of 5 stars 390 reviews

69,164 users

Autofill Forms enables you to fill out web forms with one click.

HackBar by Johan Adriaans, Pedro Laguna

Rated 5 out of 5 stars 39 reviews

33,968 users

Simple security audit / Penetration test tool.

Quick Locale Switcher by ppclick

Rated 3 out of 5 stars 81 reviews

223,977 users

Allows you to quickly switch to a different language (User Interface, Spell Checker Dictionary and Website content) in your Mozilla application.

Firecookie by Jan Odvarko

Rated 4 out of 5 stars 61 reviews

5,086 users

Firecookie is an extension for Firebug that makes possible to view and manage cookies in your browser

Firecookie is part of Firebug since Firebug 1.10

SOA Client by Michael S.

Rated 4 out of 5 stars 13 reviews

12,692 users

A portable client to access web services and UDDI registries.

Nightly Tester Tools by Automation Development, Tony Mechelynck, others

Rated 4 out of 5 stars 189 reviews

41,177 users

Useful tools for the nightly tester.
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