Mozilla Firefox is regarded as the essential popular and additionally popular web browsers. Moreover, this is certainly the essential demanded  web browsers among web designers and additionally developers. Well, in the era of established Internet Explorer and additionally Google Chrome, Firefox happens to be so prospering when making its way  for staying during the top. One of several biggest cause of such a great popularity as well as usability of Mozilla Firefox is its huge variety of phenomenal add-ons. These great extensions (add-ons) enhance the browsing experience of consumers. Amidst these numerous Firefox addons for web developers is very useful.

1. Firebug

Firebug integrates with Firefox to put a wealth of web development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page. Firebug is always just a keystroke away, but it never gets in your way. You can open Firebug in a separate window, or as a bar at the bottom of your browser. Firebug also gives you fine-grained control over which websites you want to enable it for.

 

2. YSlow

YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages. YSlow is a Firefox add-on integrated with the Firebug web development tool. YSlow grades web page based on one of three predefined ruleset or a user-defined ruleset. It offers suggestions for improving the page’s performance, summarizes the page’s components, displays statistics about the page, and provides tools for performance analysis, including Smush.it™ and JSLint.

 

3. Greasemonkey

Allows you to customize the way a web page displays or behaves, by using small bits of JavaScript. Hundreds of scripts, for a wide variety of popular sites, are already available.

 

4. FireFTP

FireFTP is a free, secure, browser based FTP client that allows you to easily access your server via Firefox instead of having to launch a separate program. Along with transferring your files quickly and efficiently, FireFTP also includes more advanced features such as: directory comparison, syncing directories while navigating, SFTP, SSL encryption, search/filtering, integrity checks, remote editing, drag & drop, file hashing, and much more!

 

5. Font Finder

FontFinder is created for designers, developers and typographers. It allows a user to analyze the font information of any element on a page, copy any piece(s) of that information to the clipboard, and perform inline replacements to test new layouts.

 

6. IE NetRenderer

Render the current page with IE NetRenderer.

Adds buttons, tools menu and contextual menu entries to get a screenshot of the current page with IE NetRenderer.

Keyboard shortcuts are also available: Ctrl+Shift+F5/F6/F7/F8 to render the page in IE5.5/6/7/8 Beta 2 (Cmd+Shift+F* on Mac).

Really useful for webmasters which are not using Windows!

 

7. iMacros for Firefox

Macros was designed to automate the most repetitious tasks on the web. If there’s an activity you have to do repeatedly, just record it in iMacros. The next time you need to do it, the entire macro will run at the click of a button! With iMacros, you can quickly and easily fill out web forms, remember passwords, create a webmail notifier, download information from other sites, scrape the Web (get data from multiple sites), and more. You can keep the macros on your computer for your own use, or share them with others by embedding them on your homepage, blog, company Intranet or any social bookmarking service. The uses are limited only by your imagination!

 

8. MeasureIt

As someone who creates designs for the Internet, one of the most chellanging job is to create design elements aligned. In that case MeasureIt comes in handy and allows you to overlay a ruler on a browser page so you can verify width, height and alignment of page elements.

 

9. Stylish

Restyle the web with Stylish, a user styles manager. Stylish lets you easily install themes and skins for Google, Facebook, YouTube, Orkut, and many, many other sites. You can even customize Firefox and other programs themselves.

User styles are themes for web sites. User styles empower your browsing experience by letting you customize web sites. Take out irrelevant content, change colors, or completely redesign the entire site.

 

10. FireShot

FireShot is an advanced screen capture add-on for Firefox. In addition to giving you the ability to capture an entire web page, FireShot also allows you to add add graphics and notes directly to your screen captures.

11. Personal Menu (Personal Firefox Button)

Now you can edit the Firefox Menu and change it to your personal and powerful one!
Personal Menu provides you a couple of new helpful items that available to be put into Firefox Menu: Bookmark Items, History Items, Configuration(about:config), Restart.
In addition, you may create toolbar-box (let you put toolbar-buttons inside), sub-menus and split-menus to organize your Firefox Menu!

 

12. Tab Badge

Adds a small badge to your tabs to alert you to (for example) new messages on Facebook. The badge is also visible when the tabs are pinned so you can see when there’s something new available. The badge is based on the title of the page, so if it is “(8) Twitter / Home”, a red badge with the number 8 is displayed inside the tab.

 

13. Web Developer

The Web Developer add-on extends Mozilla Firefox by adding a toolbar with various options for working with web pages. For example, it has an option to inspect CSS styles of page elements that will tell you what CSS attributes they have, and which styles affect them.