Deva's Collection

by Devap

33 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,760 reviews

2,710,018 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 942 reviews

1,353,617 users

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

User Agent Switcher by chrispederick

Rated 4 out of 5 stars 237 reviews

429,461 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 205 reviews

671,989 users

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

FireFTP by Mime Čuvalo

Rated 4 out of 5 stars 916 reviews

654,171 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!

Speed Dial by Josep del Rio

Rated 4 out of 5 stars 1,218 reviews

485,802 users

Direct access to your most visited websites

SQLite Manager by lazierthanthou

Rated 5 out of 5 stars 30 reviews

217,995 users

Manage any SQLite database on your computer.

Tamper Data by Adam Judson

Rated 4 out of 5 stars 127 reviews

130,786 users

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

Showcase by Josep del Rio

Rated 4 out of 5 stars 146 reviews

84,046 users

Easily find and manage your browser tabs.

ColorZilla by Alex Sirota

Rated 5 out of 5 stars 300 reviews

300,317 users

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

Live HTTP Headers by Daniel Savard, Nikolas Co

Rated 4 out of 5 stars 154 reviews

201,269 users

View HTTP headers of a page and while browsing.

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 327 reviews

173,393 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 181 reviews

129,932 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.

SearchPreview by Edward Ackroyd

Rated 4 out of 5 stars 382 reviews

115,548 users

The extension previously known as GooglePreview. Inserts preview images (thumbnails) and popularity ranks of web sites into the Google, Yahoo, Bing and DuckDuckGo search results pages.

JavaScript Debugger by James Ross, Robert Ginda, others

Rated 4 out of 5 stars 48 reviews

171,087 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.
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