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 1,650 reviews

2,866,444 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 868 reviews

1,623,557 users

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

iMacros for Firefox by iOpus

Rated 4 out of 5 stars 342 reviews

297,333 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...

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.

Web Developer by chrispederick

Rated 5 out of 5 stars 183 reviews

749,244 users

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

FoxyProxy Standard by Eric H. Jung

Rated 4 out of 5 stars 295 reviews

381,610 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.

User Agent Switcher by chrispederick

Rated 4 out of 5 stars 198 reviews

450,265 users

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

FireFTP by Mime Čuvalo

Rated 4 out of 5 stars 840 reviews

737,660 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 284 reviews

311,573 users

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

Firefox OS 1.1 Simulator by Myk Melez, J. Ryan Stinnett

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 167 reviews

147,743 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 82 reviews

48,663 users

Color tools for web development.

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

ShowIP by ShowIP Dev Team

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Experimental

Rated 3 out of 5 stars 213 reviews

88,042 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.

Tiny JavaScript Debugger by Patrick Brunschwig

Rated 4 out of 5 stars 3 reviews

16,098 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.

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