by DarkDippy

19 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,799 reviews

2,266,162 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...

NoScript Security Suite by Giorgio Maone

Rated 5 out of 5 stars 1,508 reviews

2,327,594 users

The best security you can get in a web browser!
Allow active content to run only from sites you trust, and protect yourself against XSS and Clickjacking attacks.

Web Developer by chrispederick

Rated 5 out of 5 stars 218 reviews

540,514 users

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

Flagfox by Dave G

Rated 5 out of 5 stars 636 reviews

596,172 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...

Tamper Data by Adam Judson

Rated 4 out of 5 stars 133 reviews

113,261 users

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

IE Tab V2 (Enhanced IE Tab) by

Rated 4 out of 5 stars 418 reviews

529,942 users

Note: If you are encountering the Connecting... problem see instructions below.

The updated, fully supported IE Tab. Embed IE in a Firefox tab. IE Tab Features: FF 4+ support, IE 7-9 compatibility modes, old IE Tab settings import.

IE Tab by PCMan, yuoo2k

Rated 4 out of 5 stars 1,194 reviews

238,107 users

IE Tab - an extension from Taiwan, features: Embedding Internet Explorer in tabs of Mozilla/Firefox...

Html Validator by Marc Gueury

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

FirePHP by cadorn

Rated 4 out of 5 stars 47 reviews

49,557 users

FirePHP enables you to log to your Firebug Console using a simple PHP method call.

Not using Firebug 1.9+ on Firefox 8+? See

CodeBurner for Firebug by SitePoint

Rated 3 out of 5 stars 34 reviews

32,812 users

CodeBurner is a Firefox add-on that integrates with Firebug, to extend it with reference material for HTML and CSS.

Firefinder for Firebug by Robert Nyman

Rated 3 out of 5 stars 28 reviews

22,433 users

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

Add-on Compatibility Reporter by Mozilla

Rated 4 out of 5 stars 213 reviews

78,258 users

Help make Firefox better. The Add-on Compatibility Reporter enables you to report if the Firefox add-ons that you're using are working properly.

Firecookie by Jan Odvarko

Rated 4 out of 5 stars 61 reviews

4,193 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

Inline Code Finder for Firebug by Robert Nyman

Rated 4 out of 5 stars 14 reviews

8,926 users

Inline Code Finder is an add-on to Firebug, to be able to find HTML elements with any of the below issues:

* Inline JavaScript events
* Inline style
* javascript: links

Detailed description can be found at

Server Spy by Christophe Jacquet

Rated 4 out of 5 stars 22 reviews

6,576 users

Server Spy indicates what brand of HTTP server (e.g. Apache, IIS, etc.) runs on the visited sites.
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