As I began with learning of web development I had many problems which I tried to solve with help of boards. Someone asked me, why I don’t use web developer toolbar. My answer was simply I don’t know, what it is.
Web Developer Toolbar is a add-on for firefox, which was developed by Chris Pederick. This Add-on has many useful features that I don’t want to miss anymore.
The best and most useful features are: ruler, outline-feature, validator, form-utilities, css-, cookie- and image-control.