WebDev, Design & Analytics

by kozaki

74 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,759 reviews

2,541,400 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...

User Agent Switcher by chrispederick

Rated 4 out of 5 stars 234 reviews

411,097 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

637,771 users

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

Flagfox by Dave G

Rated 5 out of 5 stars 621 reviews

717,890 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...

FireFTP by Mime Čuvalo

Rated 4 out of 5 stars 911 reviews

627,605 users

FireFTP is a free, secure, cross-platform FTP/SFTP client for Mozilla Firefox which provides easy and intuitive access to FTP/SFTP servers.

Check out my new project, FireSSH!

Tamper Data by Adam Judson

Rated 4 out of 5 stars 127 reviews

124,804 users

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

Live HTTP Headers by Daniel Savard, Nikolas Co

Rated 4 out of 5 stars 153 reviews

189,302 users

View HTTP headers of a page and while browsing.

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 327 reviews

161,941 users

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

YSlow by YSlow

Rated 3 out of 5 stars 180 reviews

123,075 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.

HttpFox by Martin Theimer

Rated 4 out of 5 stars 159 reviews

105,341 users

An HTTP analyzer addon for Firefox

Cookies Manager+ by V@no

Rated 4 out of 5 stars 69 reviews

110,822 users

Cookies manager to view, edit and create new cookies. It also shows extra information about cookies, allows edit multiple cookies at once and backup/restore them.

Google search link fix by Wladimir Palant

Rated 5 out of 5 stars 107 reviews

66,560 users

This extension prevents Google, Yahoo and Yandex search pages from modifying search result links when you click them. This is useful when copying links but it also helps privacy by preventing the search engines from recording your clicks.

Modify Headers by Gareth Hunt

Rated 4 out of 5 stars 70 reviews

142,143 users

Add, modify and filter the HTTP request headers sent to web servers. This addon is particularly useful for Mobile web development, HTTP testing and privacy.

SeoQuake SEO extension by SeoQuake Team

Rated 4 out of 5 stars 205 reviews

70,037 users

Seoquake is a Firefox SEO extension aimed primarily at helping web masters who deal with search engine optimization (SEO), social media optimization (SMO) and internet promotion. Seoquake allows to investigate many important SEO parameters.

HackBar by Johan Adriaans, Pedro Laguna

Rated 5 out of 5 stars 39 reviews

32,968 users

Simple security audit / Penetration test tool.
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