Pro Developer

by JamesWilson

37 Add-ons in this Collection

Adblock Plus by Wladimir Palant

Rated 5 out of 5 stars 5,041 reviews

20,748,129 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).

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,827 reviews

2,202,678 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...

DownThemAll! by Nils Maier, Federico Parodi, others

Rated 4 out of 5 stars 1,745 reviews

1,306,592 users

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

Greasemonkey by Anthony Lieuallen, Aaron Boodman, others

Rated 4 out of 5 stars 990 reviews

1,302,389 users

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

FoxyProxy Standard by Eric H. Jung, groeg, others

Rated 4 out of 5 stars 357 reviews

290,559 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.

ReloadEvery by Jaap Haitsma

Rated 4 out of 5 stars 710 reviews

161,177 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)

Web Developer by chrispederick

Rated 5 out of 5 stars 233 reviews

512,258 users

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

JavaScript Debugger by James Ross, Robert Ginda, others

Rated 4 out of 5 stars 50 reviews

119,992 users

As of Firefox 33, Venkman *no longer works*, as the APIs which it needs have been removed.

Venkman is the code name for Mozilla's JavaScript Debugger. Venkman aimed to provide a powerful JavaScript debugging environment for Mozilla based browsers.

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

ColorfulTabs by Shivanand Sharma

Rated 4 out of 5 stars 1,002 reviews

249,789 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.

ColorZilla by Alex Sirota

Rated 5 out of 5 stars 309 reviews

283,891 users

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

Tamper Data by Adam Judson

Rated 4 out of 5 stars 138 reviews

112,922 users

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

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 352 reviews

150,646 users

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

Live HTTP Headers by Daniel Savard, Nikolas Co

Rated 4 out of 5 stars 168 reviews

157,875 users

View HTTP headers of a page and while browsing.

ShowIP by ShowIP Dev Team

Download Now

Experimental

Rated 3 out of 5 stars 286 reviews

50,818 users

Show the IP address of the current page in the status bar. It also allows querying custom information services by IP (right click) and see location and avaiable vouchers for shopping sites. Additionally you can copy the IP address to the clipboard.
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