Nicholas' Development Profile

by nicholasalipaz

30 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,800 reviews

2,555,891 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 964 reviews

1,310,746 users

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

LastPass Password Manager by LastPass

Rated 4 out of 5 stars 1,250 reviews

754,788 users

LastPass, an award-winning password manager, saves your passwords and gives you secure access from every computer and mobile device.

Web Developer by chrispederick

Rated 5 out of 5 stars 218 reviews

599,415 users

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

Full Web Page Screenshots (♥♥♥♥♥) by susbox

Rated 5 out of 5 stars 440 reviews

299,415 users

FireShot makes full web page screenshots. Demo:

Screenshots can be quickly captured and:

― Saved as Image or PDF
― Sent to clipboard
― Printed
― Annotated *
― Uploaded *
― E-Mailed *

* OS Windows only

JavaScript Debugger by James Ross, Robert Ginda, others

Rated 4 out of 5 stars 50 reviews

140,343 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.

ColorZilla by Alex Sirota

Rated 5 out of 5 stars 306 reviews

320,702 users

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

Image Zoom by Jason Adams

Rated 4 out of 5 stars 334 reviews

172,003 users

Adds zoom and rotation functionality for images...

YSlow by YSlow

Rated 3 out of 5 stars 200 reviews

107,098 users

YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages. is the official open source website.

Add to Search Bar by Dr. Evil

Rated 5 out of 5 stars 617 reviews

87,895 users

Make any pages' search functionality available in the Search Bar (or "search box")...

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 Online HTML 5 validation, you need 0.962
Collector's Note On Linux you have to install from the HTML Validator extension's website since addons.m.o won't allow install on Linux.

Firefinder for Firebug by Robert Nyman

Rated 3 out of 5 stars 28 reviews

24,754 users

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

CodeBurner for Firebug by SitePoint

Rated 3 out of 5 stars 34 reviews

35,145 users

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

CSS Usage by Teun van Eijsden

Rated 4 out of 5 stars 38 reviews

22,996 users

Firebug extension to view which CSS rules are actually used.

Screengrab by Andy M

Rated 4 out of 5 stars 587 reviews

24,668 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.
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