Essential Add-ons for Website Development

by ProbCOMP

22 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 4 out of 5 stars 2,085 reviews

1,752,169 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 1,023 reviews

1,136,075 users

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

FireFTP by Mime Čuvalo

Rated 4 out of 5 stars 994 reviews

403,700 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!

Full Web Page Screenshots (♥♥♥♥♥) by susbox

FireShot makes full web page screenshots. Demo: http://bit.ly/RlBQMV

Screenshots can be quickly captured and:

― Saved as Image or PDF
― Sent to clipboard
― Printed
― Annotated *
― Uploaded *
― E-Mailed *

* OS Windows only

Web Developer by chrispederick

Rated 5 out of 5 stars 260 reviews

401,136 users

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

ColorZilla by Alex Sirota

Rated 4 out of 5 stars 343 reviews

220,401 users

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

IE Tab by PCMan, yuoo2k

Rated 4 out of 5 stars 1,206 reviews

163,867 users

IE Tab - an extension from Taiwan, features: Embedding Internet Explorer in tabs of Mozilla/Firefox...

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 360 reviews

117,012 users

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

YSlow by YSlow

Rated 3 out of 5 stars 220 reviews

61,453 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.

Font Finder by Ben Dodson, Eric Caron, others

Rated 4 out of 5 stars 78 reviews

32,597 users

FontFinder is created for designers, developers and typographers. It allows a user to analyze the font information of any element on a page, copy any piece(s) of that information to the clipboard, and perform inline replacements to test new layouts.

Image Zoom by Jason Adams

Rated 4 out of 5 stars 347 reviews

128,572 users

Adds zoom and rotation functionality for images...

Html Validator by Marc Gueury

Rated 4 out of 5 stars 215 reviews

44,783 users

HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla. The number of errors of a HTML page is seen on the form of an icon

For Online HTML 5 validation, you need 0.962
http://users.skynet.be/mgueury/mozilla

Tab Scope by Gomita

Rated 4 out of 5 stars 480 reviews

110,828 users

Preview and navigate tab contents through popup.

Screengrab by Andy M

Rated 4 out of 5 stars 587 reviews

17,080 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.

Firesizer by orev

Rated 4 out of 5 stars 132 reviews

22,086 users

Allows you to resize the window to specific dimensions.

NOTE: Users of Firefox 29 and above must install "The Addon Bar" extension to use this, as Firesizer uses the add-on bar that has been removed in Firefox 29.
  1. 1
  2. 2
Results 115 of 22

What are Collections?

Collections are groups of related add-ons that anyone can create and share.

Explore Collections