In addition to the built in  tools for developers, Firefox has the ability to add functionality to the development of the Internet with add-on programs called firefox extensions. Some of the most useful extensions for web developers are described in this article .

Many extensions than Mozilla developers update is available. Look under “Tools” menu development to search for additional extensions for web developers.  Hope this information can add to your knowledge as a web developer in developing the website. So enjoy it ! and do not hesitate to leave a comment

1.  Web Developer Extension
Such an expansion, in itself makes Firefox an indispensable tool for web development and testing. Web Developer extension adds a toolbar in the browser with various web developer tools. It outlines the elements of a page and shows the size of the image, CSS and form information, disables certain elements on the page, and much more.

2. Accessibility Extensions for Firefox

Firefox Accessibility Extension helps test the structural page layout to the needs of people with disabilities, to be fair. Fangs is a text representation of a page, similar to that read on the screen readers. Considered for consideration of access Accessibar renewal or extension for Firefox web developers.

3. Colorzilla

Colorzilla is an eyedropper tool.  Cursor over the color show information, DOM, as well as information about the X, Y, offset from the previous mouse.

4. Add & Edit Cookies
Add & Edit Cookies extension allows you to add and edit cookies on this page. This expansion is an outstanding version of the extension of View Cookies.

5. CSSViewer
CSSViewer explore the elements of the page to give a complete picture of CSS declaration for the selected item.
Aardvark is a CSS debugger with additional keys. The selected page elements, such as the name of the item and the identifier or class name of the selected element.

6. Firebug
Firebug helps to debug AJAX, DHTML, JavaScript and Web applications. The following errors arising from the provision page, move the mouse pointer on the line, and allows you to manage various values of the DOM.

7.LinkChecker
Link Checker checks each link on a web page to link correctly. Simple color coding makes it easy to quickly identify a dead link on the page.

8. MeasureIt
MeasureIt set the rules for displaying Web pages in width, height, orientation, or any page element.

9. Extended Statusbar
Extended Statusbar adds information on the status bar that shows the average download speeds bytes downloaded at boot time, suggested that the number of loaded images, and the proportion of the site. It looks like the status bar browser Opera.

10. Live HTTP Headers
Live HTTP Headers displays information about the HTTP headers on the page in real time.

11. User Agent Switcher
User Agent Switcher allows Firefox and other browsers, like Internet Explorer or Opera, which will be determined on a Web server.

12. HTML Validator
HTML Validator HTML verification Firefox Add-source viewer.

13. View pages in other browsers
IE Tab is an extension of pitchers URL in Internet Explorer tab of Firefox. Simple time saving sites Cross-browser compatibility verification.
IE View allows the current page or a selected link will open in Internet Explorer. OperaView provides the same functionality for the web browser Opera. In addition FirefoxView can open the current page or selected link in Internet Explorer.

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