Are you a web developer? If yes than you must using the Mozilla Firefox while developing any web application. Firefox is the best browser for developer to develop web application. But it is only the best when you are using add-ons functionality of Firefox. I am a PHP developer and i found that some of the firefox add-ons are very useful and must required while developing web application.

Below are the list of firefox add-on which are very useful and effective while developing web application.

1) Web Developer
The Firefox Web Developer add-ons is one of the most popular add-ons for web designers and developers. This add-ons contains  a variety off essential tools that allow you to troubleshoot problems easily.

2) Firebug
Aah. What an Add-on. Firebug is a superb add-on for web developers. You can easily check and update your CSS, HTML, Javascript, identify javascript errors and change the look and feel as per your needs.

3) Fireftp
FireFTP is a free, secure, browser based FTP client that allows you to easily connect to your ftp via Firefox instead of opening ftp software seperately.

4) Fireshot
FireShot is an add-on which allows you to take screenshots of your web pages with a lot of functionality like showing arrows, writing text etc.

5) Colorzilla
ColorZilla is an add-on which gives you the easist way to pick the color from your web page without opening any color picker.

6) IE tab
IE tab is very useful for designer and developer both. Using this add-on, you can see the look of IE at a single click in Mozilla Firefox itself.

7) AutoPager
AutoPager will automatically shows the other pages in bottom. This helps you when you are searching in google and result shows so many pages, you don’t need to click on 2nd page for look at results. It will automatically shows other pages at bottom.