Web Developer's Toolbox

by Mozilla

14 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,623 reviews

2,831,806 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...

Greasemonkey by Anthony Lieuallen, Aaron Boodman, others

Rated 4 out of 5 stars 854 reviews

1,799,852 users

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

Stylish by Jason Barnabe

Restyle the web with Stylish, a user styles manager. Stylish lets you easily install themes and skins for Google, Facebook, YouTube, Orkut, and many, many other sites. You can even customize Firefox and other programs themselves.

iMacros for Firefox by iOpus

Rated 4 out of 5 stars 335 reviews

293,527 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...

Web Developer by chrispederick

Rated 5 out of 5 stars 178 reviews

761,635 users

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

User Agent Switcher by chrispederick

Rated 4 out of 5 stars 195 reviews

449,303 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

Rated 4 out of 5 stars 286 reviews

390,125 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.

FireFTP by Mime Čuvalo

Rated 4 out of 5 stars 833 reviews

784,148 users

FireFTP is a free, secure, cross-platform FTP/SFTP client for Mozilla Firefox which provides easy and intuitive access to FTP/SFTP servers.

Check out my new project, FireSSH!

ColorZilla by Alex Sirota

Rated 5 out of 5 stars 282 reviews

335,121 users

Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies...

Firefox OS 1.1 Simulator by Myk Melez

Firefox OS Simulator is a test environment for Firefox OS. Use it to test your apps in a Firefox OS-like environment that looks and feels like a mobile phone. After installing it, go to Web Developer > Firefox OS Simulator to access its features.

YSlow by YSlow

Rated 3 out of 5 stars 164 reviews

144,779 users

YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages.
http://yslow.org is the official open source website.

Rainbow Color Tools by Heather Arthur

Rated 5 out of 5 stars 81 reviews

47,844 users

Color tools for web development.

Color picker and eyedropper + saving colors and trying out colors with drag and drop.

Tiny JavaScript Debugger by Patrick Brunschwig

Rated 4 out of 5 stars 3 reviews

13,094 users

TinyJSD is a JavaScript debugger for privileged code running Mozilla products like Firefox, Thunderbird, SeaMonkey. It serves to debug the application as well as extensions written in JavsScript.

ShowIP by ShowIP Dev Team

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Experimental

Rated 3 out of 5 stars 207 reviews

93,341 users

Show the IP address(es) of the current page in the status bar. It also allows querying custom information services by IP (right click) and hostname (left click), like whois, netcraft, etc. Additionally you can copy the IP address to the clipboard.

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