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 2,261 reviews

475,798 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 1,233 reviews

874,176 users

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

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 285 reviews

304,187 users

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

FireFTP by Mime Čuvalo

Rated 4 out of 5 stars 951 reviews

321,041 users

FireFTP is a free, secure, cross-platform FTP/SFTP client for Waterfox which provides easy and intuitive access to FTP/SFTP servers.

Check out my new project, FireSSH!

IE Tab by PCMan, yuoo2k

Rated 4 out of 5 stars 1,227 reviews

114,692 users

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

ColorZilla by Alex Sirota

Rated 4 out of 5 stars 387 reviews

175,826 users

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

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 343 reviews

94,292 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 345 reviews

94,499 users

Adds zoom and rotation functionality for images...

Capture Fox by Capture Fox Developer

Rated 4 out of 5 stars 98 reviews

72 users

You can capture your screen and record your voice to make screencasts (tutorials, e-lessons, etc.).

Html Validator by Marc Gueury

Rated 4 out of 5 stars 207 reviews

32,258 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

Until Firefox 56, use 0.974 (other versions)
For Firefox 57, see Web Extensions below

YSlow by YSlow

Rated 3 out of 5 stars 210 reviews

36,802 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.

Screengrab by Andy M

Rated 4 out of 5 stars 575 reviews

11,431 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.

Tab Scope by Gomita

Rated 4 out of 5 stars 454 reviews

67,364 users

Preview and navigate tab contents through popup.

Font Finder by Ben Dodson, Eric Caron, others

Rated 4 out of 5 stars 76 reviews

26,481 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.
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