Top 10 FireFox 3 Extensions for Web Developers
FireFox is such a power browser that offers millions of extensions for your comfort. I earlier wrote about 30 Firefox Add-ons to do just about anything and it turned out to be quiet helpful for many readers. If you’re a web developer then this is something you’re going to love. Also please don’t forget to Subscribe for more upcoming tips and tricks.
Firefox 3 Extensions for Web Developers

Codetch gives you the feel of Dreamweaver in a Firefox extension and allows you to edit your documents right next to your web pages as you surf. If you know how to use Frontpage, Expression Web or any visual/code editor then you’ll know how to use Codetch.
2. ColorZilla
ColorZilla gives you the option to 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. The built-in palette browser allows choosing colors from pre-defined color sets and saving the most used colors in custom palettes.
3. Aardvark
Aardvark is a powerful and user friendly selector utility for selecting elements and doing various actions on them. It can be used for cleaning up a page prior to printing it by removing and isolating elements, and for web development.

After installing Aardvark, simply just right-click on the page and select Start Aardvark from the popup menu. As you move the mouse over the page, you will see a red rectangle around the current block element, along with a label showing its type, and if they exist, its id, class, and style. You can then press various keys on the keyboard to do things, for instance W to navigate wider , R to remove the element, I to isolate the element , V to view formatted source of that element, U to undo, Q to quit aardvark, and H for help, that is, a list of the 14 or so available keystrokes.
4. FireBug

Firebug integrates with Firefox to put a wealth of development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page.

HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla. The number of errors of a HTML page is seen on the form of an icon in the status bar when browsing.
The extension can validate the HTML sent by the server or the HTML in the memory after Ajax execution.
6. LinkChecker

LinkChecker can come on Handy for Developers who needs to check pages with many links that are external to their website. It’s gives you a quick way to see where you need to make updates.
7. Poster

A developer tool for interacting with web services and other web resources that lets you make HTTP requests, set the entity body, and content type. This allows you to interact with web services and inspect the results.
8. Professor X
Professor X is a great Firefox add oon that allows you to check the contents of the head of page without getting into source code. Once installed the Professor X command is available by right-clicking as well as in the Tools menu. When applied to a page it will display the contents of the page’s head element, including Meta, Script and Style content.
9. X-Ray

Just like Professor X, X-Ray allows you to view webpage code with just a click of a button without viewing the source code.
Style Sheet Chooser II allows you to choose author-provided alternate style sheets for a web site, and have those choices be persisted for all pages on the same site. Style Sheet Chooser II replaces Firefox’s built-in style sheet switcher.
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[...] Comment! Firefox es un navegador que ofrece el poder de millones de extensiones para nuestra comodidad, y es por ello por lo que se ha convertido en mi preferido. Las extensiones o Add-ons las hay de todos los colores pero ahora vamos a poner 10 para los desarrolladores web. [...]