Search Results for tag "developer"

Firebug Featured

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...

Rated 5 out of 5 stars (1,842)
2,024,418 users

Web Developer Requires Restart Featured

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

Rated 5 out of 5 stars (249)
448,514 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...

Rated 5 out of 5 stars (666)
484,193 users

HttpFox Requires Restart

An HTTP analyzer addon for Firefox

Rated 4 out of 5 stars (170)
81,331 users

YSlow Requires Restart

YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages. is the official open source website.

Rated 3 out of 5 stars (215)
72,472 users

Html Validator Requires Restart

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

Rated 4 out of 5 stars (216)
50,015 users

FirePHP Requires Restart

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

Not using Firebug 1.9+ on Firefox 8+? See

Rated 4 out of 5 stars (48)
39,496 users

DOM Inspector Requires Restart

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.

Rated 5 out of 5 stars (70)
118,866 users

Disable Add-on Compatibility Checks

Reinstates the extensions.checkCompatibility preference without respect to the current application version.

Rated 4 out of 5 stars (107)
37,310 users

Clear Cache Requires Restart

Clear Cache was developed to make it easier for Web development, clearing your browser cache (RAM and DISK) by pressing a button or via the F9 key.

F9 Fever! ;)

Rated 5 out of 5 stars (27)
18,525 users

Nightly Tester Tools Requires Restart

Useful tools for the nightly tester.

Rated 4 out of 5 stars (195)
26,439 users


A REST client for the rest of us

Rated 4 out of 5 stars (11)
8,241 users


Firebug plugin for jQuery development

Rated 4 out of 5 stars (54)
21,792 users


Pretty-prints JSON content in the browser for easy, unobtrusive viewing.

Rated 4 out of 5 stars (36)
8,793 users

Firecookie Requires Restart

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

Rated 4 out of 5 stars (61)
2,564 users

Firepicker Requires Restart

Simple color picker plugin for Firebug.

Rated 5 out of 5 stars (56)
14,739 users

Developer Tools - toolbar button Requires Restart

Access and activate the native Firefox Web Developer tools faster through this toolbar button (menu). Button can be placed on any toolbar.

Rated 4 out of 5 stars (9)
9,509 users

Toggle Web Developer Toolbar

Toggle Web Developer Toolbar has been specially designed for web developers to provide easy to use methods to toggle Web Developer toolbar so that they can preserve their browser view area when they do not use Web Developer toolbar.

Rated 5 out of 5 stars (5)
11,295 users


Add-on to display GitHub code in tree format

Rated 5 out of 5 stars (12)
2,874 users

Illuminations for Developers for Firebug Requires Restart

Enhances Firebug to understand JavaScript libraries and frameworks, making things more obvious and helpful when debugging. Trial version, fully functional.

Rated 3 out of 5 stars (8)
12,702 users