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by Pascal Polleunus

13 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 4 out of 5 stars 2,245 reviews

660,472 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...

iMacros for Firefox by Ipswitch, Inc.

Rated 4 out of 5 stars 572 reviews

469,008 users

Automate Firefox. Record and replay repetitive tasks. If you're tired of manually visiting the same sites, filling out forms, downloading files and extracting data, then iMacros is for you! Save time, effort and money with iMacros browser automation!

Web Developer by chrispederick

Rated 5 out of 5 stars 284 reviews

290,851 users

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

Password Exporter by Justin Scott (fligtar), Jorge Villalobos

Rated 4 out of 5 stars 405 reviews

172,413 users

This add-on allows you to export your saved passwords and disabled login hosts using XML or CSV files that can be imported later.

Note: This add-on won't work in Firefox 57. It may eventually if the APIs to access passwords are implemented.

FlashFirebug by O-Minds

Rated 4 out of 5 stars 5 reviews

15,200 users

Debug Flash/SWF files on the web. Edit properties and inspect elements on the fly. View log output inside the extension. Run AS3 code against the active SWF. Access assets with the Explorer. (NOW SUCCEEDED BY FLASH DEBUGGER. CHECK ADDON DESCRIPTION)

ColorZilla by Alex Sirota

Rated 4 out of 5 stars 387 reviews

169,077 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 180 reviews

83,650 users

View HTTP headers of a page and while browsing.

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 343 reviews

91,214 users

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

DOM Inspector by SeaMonkey Council

Rated 5 out of 5 stars 75 reviews

71,406 users

DOM Inspector is a tool that can be used to inspect and edit the live DOM of any web document or XUL application. The DOM can be navigated using a two-paned window displaying a variety of different views on the document and all nodes within.

YSlow by YSlow

Rated 3 out of 5 stars 210 reviews

35,118 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.

Screengrab by Andy M

Rated 4 out of 5 stars 575 reviews

10,920 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.

FireQuery by BinaryAge, Jan Odvarko

Rated 4 out of 5 stars 54 reviews

8,896 users

Firebug plugin for jQuery development

Firecookie by Jan Odvarko

Rated 4 out of 5 stars 57 reviews

811 users

Firecookie is an extension for Firebug that makes possible to view and manage cookies in your browser

Firecookie is part of Firebug since Firebug 1.10

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