Web Development

by ace999

12 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,837 reviews

2,012,315 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 263 reviews

317,322 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

443,151 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

248,584 users

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

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 354 reviews

131,352 users

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

Image Zoom by Jason Adams

Rated 4 out of 5 stars 340 reviews

138,952 users

Adds zoom and rotation functionality for images...

Firefinder for Firebug by Robert Nyman

Rated 3 out of 5 stars 28 reviews

19,569 users

Finds HTML elements matching chosen CSS selector(s) or XPath expression

ShowIP by ShowIP Dev Team

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Experimental

Rated 3 out of 5 stars 286 reviews

43,616 users

Show the IP address of the current page in the status bar. It also allows querying custom information services by IP (right click) and see location and avaiable vouchers for shopping sites. Additionally you can copy the IP address to the clipboard.

Dust-Me Selectors by brothercake

Rated 4 out of 5 stars 84 reviews

14,815 users

Dust-Me Selectors is development tool to remove unused CSS selectors.

PageDiff by Khadir Abdul

Rated 4 out of 5 stars 15 reviews

1,653 users

Pagediff is a simple page compare application. It helps web developers and designers to see HTML-code(text) differences between web pages...
One can visit my site to download new version(new versions before release)

DNS Cache by djungowski

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Experimental

Rated 4 out of 5 stars 26 reviews

1,681 users

Allows you to disable and enable or manually flush the DNS Cache of Firefox (Notice: This addon is no longer maintained. If you'd like to update it for newer Firefox versions check out the Github repo: https://github.com/djungowski/ff-dnscache)

Library Detector by pbakaus

Rated 4 out of 5 stars 26 reviews

911 users

Detects what javascript libraries are being used on the current page and displays the result as icons with detailed tooltips in the statusbar.

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