DevTools collection

by Thomas

5 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,766 reviews

2,458,043 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...

Web Developer by chrispederick

Rated 5 out of 5 stars 209 reviews

604,332 users

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

YSlow by YSlow

Rated 3 out of 5 stars 186 reviews

115,472 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.

View Source Chart by Jennifer Madden

Rated 5 out of 5 stars 104 reviews

16,662 users

Inspect the DOM at lightning speed.

Library Detector by pbakaus

Rated 4 out of 5 stars 27 reviews

1,185 users

Detects what javascript libraries are being used on the current page and displays the result as icons with detailed tooltips in the statusbar.

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