Firefox, one of the most popular browsers, can be the best tool for a web developers at work.

The following are some of the most popular and useful Firefox add-ons for a web developer:

1. FireBug: It is undoubtedly the best Javascript and CSS debugger created till date. The main components of Firebug are the console, the HTML inspection tool, the CSS Manipulation tool, the script debugging tool, the DOM inspector and the Net console. Each of these are extremely useful while creating or testing both static or dynamic web-pages. The console can be used to monitor all sorts of AJAX get or post requests, checking for headers, requests and responses sent or received in these requests, keeping watch on which script makes the AJAX call, etc. The HTML inspection tool can help check the HTML structure of the web page element by element as well as can help manipulate the styling for these elements and see the preview instantly, it also helps in checking out DOM manipulations made by the Javascript. The CSS, script debugging tools can be used to manipulate the script or the styling instantly.

2. Measure It: As a web developer it is very common that we require certain dimensions of the page we created to be measured on the fly. The only way to do this till now was to take a screenshot and use a photo manipulation software to get the exact dimension of the page. But thanks to Measure It we now can take the measurement of any page or image opened inside Firefox just by clicking and dragging.

3. Colorzilla: How many times does a web developer wish that he could use a color picker to get the color form the web page into hex. Now because of Colorzilla its possible on Firefox. Just select the color and check out the Hex code of the color in the bottom bar. The only con in this Add-on is that it doesn’t give an option to copy the hex code directly to the clipboard. But still its surely a life saver.

4. Web developer Tool: The much acclaimed all in one web developer tool for Firefox. It is a mix of everything that a web developer might need to inspect his website. But the sad part is the presence of all options makes it lesser usable and more confusing for a first time user. Anyways some of its important tools are the disabling features which can disable almost anything on a web page i.e. from images to scripts, the Cookies feature which can be really helpful for checking the behavior and values of the cookies on a web page, CSS tool which has similar features to firebug but in a worser UI, the Form tool to manipulate and inspect forms on a web page, images tool used for finding broken, half loaded images, images loaded from different domain and to disable images. There are few more additional features as well but the UI undoubtedly could have been better.

5. Resize Window: Any web developer knows 1024×768 happens to be one of the most common resolutions on which web sites need to look good but most web devs happen to have higher resolution screens so this add-on can help them to check out their website instantly on any resolution instantly by resizing their window.

So, if you are someone who is just entering the field of web development do not forget to load these add-ons onto your Firefox to turn it into the perfect web developer tool.