Web developer

by Aldis

17 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,829 reviews

2,045,421 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 993 reviews

1,252,142 users

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

FoxyProxy Standard by Eric H. Jung, groeg, others

Rated 4 out of 5 stars 358 reviews

280,025 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.

iMacros for Firefox by Ipswitch

Rated 4 out of 5 stars 396 reviews

645,090 users

Automate Firefox. Record and replay repetitive tasks. If you're tired of manually visiting the same sites, filling out forms, downloading files and extracting data, then iMacros is for you! Save time, effort and money with iMacros browser automation!

User Agent Switcher by chrispederick

Rated 4 out of 5 stars 263 reviews

330,762 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 235 reviews

465,920 users

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

ColorZilla by Alex Sirota

Rated 5 out of 5 stars 309 reviews

258,534 users

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

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 352 reviews

135,203 users

Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.

Live HTTP Headers by Daniel Savard, Nikolas Co

Rated 4 out of 5 stars 168 reviews

145,649 users

View HTTP headers of a page and while browsing.

Modify Headers by Gareth Hunt

Rated 4 out of 5 stars 74 reviews

111,990 users

Add, modify and filter the HTTP request headers sent to web servers. This addon is particularly useful for Mobile web development, HTTP testing and privacy.

Wappalyzer by Elbert Alias

Rated 4 out of 5 stars 102 reviews

75,657 users

Wappalyzer is a browser extension that identifies software on websites.

FlashFirebug by O-Minds

Rated 4 out of 5 stars 5 reviews

23,210 users

Debug Flash/SWF files on the web. Edit properties and inspect elements on the fly. View log output inside the extension. Run AS3 code against the active SWF. Access assets with the Explorer. (NOW SUCCEEDED BY FLASH DEBUGGER. CHECK ADDON DESCRIPTION)

Clear Cache Button by Chris Holtz

Rated 4 out of 5 stars 131 reviews

75,892 users

Adds a clear cache toolbar button. After installing the extension, find the clear cache button in the toolbar customization...

Firecookie by Jan Odvarko

Rated 4 out of 5 stars 61 reviews

2,854 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

Controle de Scripts by Fernando Pereira Silveira

Rated 4 out of 5 stars 28 reviews

2,657 users

Controle de Scripts is an extension that allows you to control what JavaScripts do on your browser.
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