Web-Development

by David Fichtmueller

15 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 4 out of 5 stars 2,100 reviews

1,322,613 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 1,155 reviews

866,595 users

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

Stylish by userstyles.org

Rated 4 out of 5 stars 875 reviews

319,351 users

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

FireFTP by Mime Čuvalo

Rated 4 out of 5 stars 946 reviews

300,759 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!

Web Developer by chrispederick

Rated 5 out of 5 stars 271 reviews

283,368 users

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

ColorZilla by Alex Sirota

Rated 4 out of 5 stars 384 reviews

162,974 users

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

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 362 reviews

89,692 users

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

Locale Switcher by bsmedberg

Rated 4 out of 5 stars 27 reviews

41,777 users

Displays a menu item for switching the application locale.

Image Zoom by Jason Adams

Rated 4 out of 5 stars 341 reviews

96,525 users

Adds zoom and rotation functionality for images...

DOM Inspector by SeaMonkey Council

Rated 5 out of 5 stars 73 reviews

71,152 users

DOM Inspector is a tool that can be used to inspect and edit the live DOM of any web document or XUL application. The DOM can be navigated using a two-paned window displaying a variety of different views on the document and all nodes within.

Quick Locale Switcher by ppclick

Rated 3 out of 5 stars 86 reviews

157,978 users

Allows you to quickly switch to a different language (User Interface, Spell Checker Dictionary and Website content) in your Mozilla application.

Screengrab by Andy M

Rated 4 out of 5 stars 571 reviews

11,014 users

Screengrab! saves webpages as images... but not for new versions of Firefox.

FF changes too fast and I don't have the time to maintain it anymore. Bugs have developed that I am not in a position to investigate.

Therefore, Screengrab is EOL.

Header Spy by IronNem

Rated 4 out of 5 stars 19 reviews

2,766 users

Shows HTTP headers on statusbar.

Console² by Philip Chee, zeniko

Rated 5 out of 5 stars 49 reviews

3,509 users

Console² (pronounced Console Squared or Console Two) replaces the JavaScript Console with what could be the next generation Error Console. From v0.5 includes the Console Filter extension previously available separately from the Console² website.

UrlParams by Erik Schmidt

Rated 4 out of 5 stars 38 reviews

148 users

Shows you the GET and POST parameters of the current website in the sidebar...

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