Found an excellent add-on for Firefox that no web designer/ developer should be without. It is called FireBug and is packed with features to make your lives easier. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page.
Here is a quick snippet of features taken from the developers site
- Inspect and edit HTML
- Tweak CSS to perfection
- Visualize CSS metrics
- Monitor network activity
- Debug and profile JavaScript
- Quickly find errors
- Explore the DOM
- Execute JavaScript on the fly
- Logging for JavaScript
And Im sure there are more Go check it out at http://www.getfirebug.com/
