Firefox is one of the important and dependable browsers in web community. This article provides some useful Addons and plugins for designers and developers.

Font Finder 1.0

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.

CSS validator 3.0.0

Validates a page using the W3C CSS Validator. Adds an option to the right-click context menu and to the Tools menu to allow for easy validation of the CSS of the current page. Opens the results in a new tab. Will only work on pages that have a CSS file associated. For example it will work with http://www.w3.org/ as the URL has a CSS file.

JavaScript Debugger 0.9.88.2

Venkman is the code name for Mozilla’s JavaScript Debugger. Venkman aims to provide a powerful JavaScript debugging environment for Mozilla based browsers.

Window Resizer 1.0

The Browser Window Resizer is useful for testing different screen sizes. It accurately resizes your browser so you can test to see what a web page looks like in all of the standard resolution sizes.

ColorZilla 2.6.4

With ColorZilla you can get a color reading from any point in your browser, quickly adjust this color and paste it into another program. You can Zoom the page you are viewing and measure distances between any two points on the page.

Picnik 2.3

This extension adds a menu option when you right click on images to make it easy to pull the image into Picnik for editing.

ScrapBook 1.4.9

ScrapBook is a Firefox extension, which helps you to save Web pages and easily manage collections. Key features are lightness, speed, accuracy and multi-language support.

Yoono

All your social networks and instant messaging in one easy to use app – it’s the #1 downloaded social networking add-on for Firefox. Get all your updates, update your status and share across Facebook, Twitter, LinkedIn, YouTube & more – all at once!

Showcase 0.9.5.8

Showcase provides a new way to manage your Firefox tabs and windows by showing them as thumbnails in a single window, tab or sidebar. Includes a find bar that will filter the thumbnails, and the capability to select the thumbnails in the same way you would select files in your system.

WOT

Would you like to know which websites you can trust? WOT shows you which websites are trustworthy based on millions of users’ experiences. WOT is easy-to-use, fast and completely free.