Web Development

by ace999

12 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,799 reviews

2,256,333 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 251 reviews

364,479 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 218 reviews

537,789 users

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

ColorZilla by Alex Sirota

Rated 5 out of 5 stars 306 reviews

286,986 users

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

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 341 reviews

148,513 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 334 reviews

166,232 users

Adds zoom and rotation functionality for images...

ShowIP by ShowIP Dev Team

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Rated 3 out of 5 stars 285 reviews

61,389 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.

Firefinder for Firebug by Robert Nyman

Rated 3 out of 5 stars 28 reviews

22,297 users

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

Dust-Me Selectors by brothercake

Rated 4 out of 5 stars 79 reviews

16,153 users

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

PageDiff by Khadir Abdul

Rated 4 out of 5 stars 15 reviews

1,614 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)

Library Detector by pbakaus

Rated 4 out of 5 stars 27 reviews

1,136 users

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

DNS Cache by djungowski

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Rated 4 out of 5 stars 26 reviews

2,149 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)

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