mastergenius web developer addons

by mastergenius

19 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,784 reviews

2,255,103 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 956 reviews

1,227,480 users

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

Web Developer by chrispederick

Rated 5 out of 5 stars 216 reviews

539,011 users

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

Flagfox by Dave G

Rated 5 out of 5 stars 634 reviews

593,776 users

Displays a country flag depicting the location of the current website's server and provides a multitude of tools such as site safety checks, whois, translation, similar sites, validation, URL shortening, and more...

FireGestures by Gomita

Rated 4 out of 5 stars 874 reviews

388,369 users

A customizable mouse gestures extension which enables to execute various commands and user scripts with six types of gestures.

Tamper Data by Adam Judson

Rated 4 out of 5 stars 130 reviews

111,935 users

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

SQLite Manager by lazierthanthou

Rated 5 out of 5 stars 38 reviews

195,789 users

Manage any SQLite database on your computer.

ColorZilla by Alex Sirota

Rated 5 out of 5 stars 303 reviews

274,572 users

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

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 333 reviews

144,218 users

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

JavaScript Deobfuscator by Wladimir Palant

Rated 5 out of 5 stars 20 reviews

53,776 users

This add-on shows you what JavaScript code runs on a web page, even if it is obfuscated and generated on the fly. Simply open JavaScript Deobfuscator from the Web Developer menu and watch the scripts being compiled/executed.

Tree Style Tab by Piro (piro_or)

Download Now

Experimental

Rated 4 out of 5 stars 1,199 reviews

99,585 users

Show tabs like a tree.

YSlow by YSlow

Rated 3 out of 5 stars 192 reviews

100,627 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

Rated 5 out of 5 stars 198 reviews

56,738 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

Firefinder for Firebug by Robert Nyman

Rated 3 out of 5 stars 28 reviews

22,318 users

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

Extended Statusbar by Strahinja Kustudić

Rated 4 out of 5 stars 250 reviews

48,250 users

A Statusbar with speed, percentage, time and loaded size (similar to Opera's one)
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