i know this might not be the correct topic; but through my short HTML developing period, i've found mozilla firefox and its great add-on capability with great help.
here are the add-ons i use the most when working on HTML:
ColorZilla - Advanced Eyedropper, ColorPicker, Page Zoomer and other colorful goodies.
Measure-It - Draw out a ruler to get the pixel width and height of any elements on a webpage.
IE-Tab - This is a great tool for web developers, since you can easily see how your web page displayed in IE with just one click and then switch back to Firefox.
Web Developer Toolbar - Adds a menu and a toolbar with various web developer tools.
hopefully with these tools, you can help out our friend more efficently ans quickly 