Pro Developer

by JamesWilson

37 Add-ons in this Collection

Adblock Plus by Wladimir Palant

Rated 5 out of 5 stars 5,660 reviews

13,515,321 users

Blocks annoying video ads on YouTube, Facebook ads, banners and much more.

Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).

Greasemonkey by Anthony Lieuallen, Aaron Boodman, others

Rated 4 out of 5 stars 1,158 reviews

864,202 users

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

DownThemAll! by Nils Maier, Federico Parodi, others

Rated 4 out of 5 stars 1,807 reviews

919,989 users

The first and only download manager/accelerator built inside Firefox!

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 4 out of 5 stars 2,108 reviews

1,329,451 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...

FoxyProxy Standard by Eric H. Jung, groeg, others

Rated 4 out of 5 stars 398 reviews

183,197 users

FoxyProxy is an advanced proxy management tool that completely replaces Firefox's limited proxying capabilities. For a simpler tool and less advanced configuration options, please use FoxyProxy Basic.

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 272 reviews

283,945 users

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

Tamper Data by Adam Judson

Rated 4 out of 5 stars 164 reviews

67,384 users

Use tamperdata to view and modify HTTP/HTTPS headers and post parameters...

ReloadEvery by Jaap Haitsma

Rated 4 out of 5 stars 712 reviews

97,389 users

Reloads web pages every so many seconds or minutes. The function is accessible via the context menu (menu you get when you right click on a web page) or via tab context menu (right click on the tab)

ColorZilla by Alex Sirota

Rated 4 out of 5 stars 384 reviews

163,457 users

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

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 362 reviews

90,435 users

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

Firefinder for Firebug by Robert Nyman

Rated 3 out of 5 stars 28 reviews

12,465 users

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

ColorfulTabs by Shivanand Sharma

Rated 4 out of 5 stars 968 reviews

143,164 users

The first addon you should be installing on a fresh Firefox install. A must have. The most beautiful yet the simplest add-on that makes a strong colorful appeal. Colors every tab in a different color.

CodeBurner for Firebug by SitePoint

Rated 3 out of 5 stars 35 reviews

14,010 users

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

Html Validator by Marc Gueury

Rated 4 out of 5 stars 218 reviews

28,680 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
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