Thought it's not specifically related to PHP, this new article from WebReference.com has some very handy pointers to a few Firefox extensions (you do use Firefox, don't you?) to help you along with your web development.

One of the exciting areas that extension developers have focused is on Web development. These extensions range from simple link checkers to full blown Web development projects. We'll take a look at some of them here. First, we'll begin with the smaller, easier to use extensions.

The extensions they go through include:

• LinkChecker
• MeasureIt
• View Rendered Source
• Colorzilla Color Picker
• Venkman
• and much more...

I know I keep the WebDeveloperthese others...