constantin.noll

by Constantin Noll

16 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,756 reviews

2,609,351 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 326 reviews

359,769 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.

User Agent Switcher by chrispederick

Rated 4 out of 5 stars 234 reviews

428,565 users

The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.

Web Developer by chrispederick

Rated 5 out of 5 stars 203 reviews

662,417 users

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

Webpage Screenshot in Firefox (♥♥♥♥♥) by susbox

Rated 5 out of 5 stars 420 reviews

278,444 users

FireShot Webpage Screenshots captures webpage screenshot entirely (see demo: http://bit.ly/RlBQMV)

The screenshot can be quickly annotated and:

+ Uploaded
+ Saved as PDF/PNG/GIF/JPEG/BMP
+ Sent to clipboard
+ Printed
+ E-Mailed
+ Exported

ColorZilla by Alex Sirota

Rated 5 out of 5 stars 300 reviews

291,403 users

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

IE Tab by PCMan, yuoo2k

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

YSlow by YSlow

Rated 3 out of 5 stars 176 reviews

129,110 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.

Html Validator by Marc Gueury

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 Firefox 23+, you need 0.958 (under review)
http://users.skynet.be/mgueury/mozilla

FirePHP by cadorn

Rated 4 out of 5 stars 45 reviews

66,702 users

FirePHP enables you to log to your Firebug Console using a simple PHP method call.

Not using Firebug 1.9+ on Firefox 8+? See http://firephp.org/

JavaScript Debugger by James Ross, Robert Ginda, others

Rated 4 out of 5 stars 48 reviews

181,036 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.

Pixel Perfect by Mike Buckley, Lorne Markham, others

Rated 4 out of 5 stars 97 reviews

15,735 users

Pixel Perfect is a Firefox/Firebug extension that allows web developers and designers to easily overlay a web composition over top of the developed HTML.

TooManyTabs - Saves Your Memory by Visibo

Rated 4 out of 5 stars 172 reviews

14,193 users

TooManyTabs allows you to store as many tabs as you like by adding extra rows in the Firefox! It saves your browser's space and memory as idle tabs are put aside. The extra rows also help to better prioritize and visualize your tabs.

TrashMail.com for Mozilla Firefox® by Ferraro Ltd.

Rated 4 out of 5 stars 56 reviews

13,510 users

Create free disposable email addresses and paste them directly in forms. This helps to protect you from spam mails and could be useful when subscribing to forums or newsletters...

GridFox by Eric Puidokas

Rated 4 out of 5 stars 16 reviews

7,592 users

Draws a grid on top of a website
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