Firebug: Must-have web development Firefox plugin
I knew about this plugin already but I just upgraded to the latest version (0.3) and I believe it is now close to perfection. The best feature in my opinion is the inspector tab that lets you stroll though the source, style, layout, events and DOM. It also logs XmlHttpRequests for AJAX debugging and has a JavaScript console. I tried several FF plugins for debugging JavaScript and CSS in the past but this one has to be the best (until someone comes up with something even better of course).

Get it now from JoeHewitt.com.

March 30th, 2006 at 11:22 am
How Stable is this?? How much testing have,and how long???
March 30th, 2006 at 11:31 am
I’ve been using Firebug for a few months now with no problems. I upgraded this morning and it’s already helped me solve a few CSS problems.
It’s only a Firefox plugin so you can uninstall it if you’re not happy with it
April 19th, 2006 at 7:24 pm
Looks nice. I liked the FF plugin, “Render Source Chart.”
June 23rd, 2006 at 1:40 pm
Cool plugin!
July 20th, 2006 at 7:39 am
Useful tool and good idea to further work on
December 3rd, 2006 at 3:08 am
Great Plugin. Thank you for the link!