Web Workers

by lisawantscake

16 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,623 reviews

2,906,910 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 854 reviews

1,801,849 users

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

Stylish by Jason Barnabe

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

Web Developer by chrispederick

Rated 5 out of 5 stars 178 reviews

775,513 users

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

YSlow by YSlow

Rated 3 out of 5 stars 164 reviews

149,283 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.

SearchPreview by Edward Ackroyd

Rated 4 out of 5 stars 352 reviews

145,643 users

The extension previously known as GooglePreview. Inserts preview images (thumbnails) and popularity ranks of web sites into the Google, Yahoo, Bing and DuckDuckGo search results pages.

CodeBurner for Firebug by SitePoint

Rated 3 out of 5 stars 32 reviews

57,692 users

CodeBurner is a Firefox add-on that integrates with Firebug, to extend it with reference material for HTML and CSS.

Greasefire by Steve Krulewitz, Erik Vold

Rated 4 out of 5 stars 157 reviews

24,784 users

Automatically find user scripts on Userscripts.org (requires Greasemonkey or Scriptish)

Shareaholic | share with Google, Facebook and more by The Shareaholic Team

Rated 4 out of 5 stars 226 reviews

27,290 users

Shareaholic is the easiest way to share interesting links using Facebook, Twitter, Google Mail, Reader, Bookmarks, Evernote, Bitly, StumbleUpon, and more... from one simple ALL-IN-ONE add-on. This is the ultimate tool for the link sharing addict!

Firecookie by Jan Odvarko

Rated 4 out of 5 stars 57 reviews

8,595 users

Firecookie is an extension for Firebug that makes possible to view and manage cookies in your browser

Firecookie is part of Firebug since Firebug 1.10

Better Gmail 2 by Gina Trapani

Rated 4 out of 5 stars 512 reviews

27,913 users

Add useful extra features to Gmail, like hierarchical labels, an unread message icon on your browser tab, file attachment icons, and more.

Accessibility Evaluation Toolbar by Jon Gunderson

Rated 4 out of 5 stars 16 reviews

6,812 users

Support web developers in testing web resources for accessibility features.

SenSEO by Nico Steiner

Rated 4 out of 5 stars 40 reviews

10,514 users

SenSEO is an extension checking the most important on-page-SEO-criteria and calculating a grade of how good your site fulfills these criteria.

PDF Plugin for Firefox on Mac OS X by Sam Gross

Rated 4 out of 5 stars 218 reviews

21,181 users

Note from Mozilla: This add-on has been discontinued. Try PDF Viewer instead.

PDF plugin for Firefox 3 on Mac OS X. Displays PDF documents in the browser.

Mozilla Labs - Jetpack Prototype by Mozilla Labs

Rated 4 out of 5 stars 27 reviews

499 users

Jetpack Prototype is an experiment in making it easy to build Firefox add-ons using common web technologies.
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