New features include:
- A dom walker, for inspecting elements and their properties in the DOM.
- An inline CSS editor- for tweaking CSS in real time. There is an interesting feature in the CSS editor where selecting a number and using the arrow keys, adjusts the numeric value. Great for keeping your eyes on the design instead of the code
Rather than me banging on about how great it is, have a read directly from the source. These two links got me the most excited:
When your CSS boxes aren't lining up correctly it can be difficult to understand why. Let Firebug be your eyes and it will measure and illustrate all the offsets, margins, padding, and sizes for you.
The video is about a hour long. A worthwhile investment.