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 1,770 reviews

2,508,515 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 245 reviews

398,035 users

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

Web Developer by chrispederick

Rated 5 out of 5 stars 213 reviews

604,402 users

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

FoxyProxy Standard by Eric H. Jung, groeg, others

Rated 4 out of 5 stars 339 reviews

318,627 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.

Tamper Data by Adam Judson

Rated 4 out of 5 stars 128 reviews

121,877 users

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

FireGestures by Gomita

Rated 4 out of 5 stars 866 reviews

409,209 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 952 reviews

410,411 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 155 reviews

184,378 users

View HTTP headers of a page and while browsing.

HttpFox by Martin Theimer

Rated 4 out of 5 stars 161 reviews

105,044 users

An HTTP analyzer addon for Firefox

Autofill Forms by Sebastian Tschan, Egor Zindy, others

Rated 3 out of 5 stars 392 reviews

69,007 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 40 reviews

34,154 users

Simple security audit / Penetration test tool.

Quick Locale Switcher by ppclick

Rated 3 out of 5 stars 81 reviews

244,672 users

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

SOA Client by Michael S.

Rated 4 out of 5 stars 13 reviews

13,812 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

40,911 users

Useful tools for the nightly tester.

NoRedirect by Kai Liu

Rated 4 out of 5 stars 49 reviews

12,206 users

NoRedirect lets the user take control of HTTP redirects. It can be used to interdict an ISP's DNS search redirection hijacks, preview/screen "shortened" URLs (e.g., TinyURL), stop the annoying redirection of "smart" error pages, etc.
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