There’s also amore detailed explanationof how to do this.
Must-Have Web Dev Extensions
These are all extensions that I use on a regular basis for web development.
Firebug
Firebug is the most powerful extension for debugging javascript, viewing CSS and html.
It’s truly the best extension out there.
Web Developer Extension
One of the best extensions for x years running.
This is a must-have for any developer, but you’ve already heard of it.
it’s possible for you to also use it to remove elements from the page.
Colorzilla
Select colors easily.
No more pain of finding colors embedded somewhere in a stylesheet.
HTML Validator
This extension lets you easily validate your page HTML and installs into the View Source panel.
Measure It
Easily measure a distance on the screen with this extension.
IE Tab will even let you run IE inside of a tab, if you were so inclined.
Clear Cache Button
Clears the cache.
Especially useful for checking new CSS changes.
It’ll even give you a grade on your site performance.
Very useful extension, but it does require the Firebug extension.
At this point, you’ve now turned Firefox into the ultimate web development tool.
Take the time to learn how to use Firebug especially.
