I used to use the inspect, click then view the css properties.

Well, its fine for development, but sometimes, I just want to see how others built their site.
It becomes a hassles to hover, click and view.

I think FF's firebug as a popout box that shows CSS properties as you mouse over them.

But I don't really use FF anymore other then compatibility check.

Wondering if any of you guys happened to see an Chrome extension of such kind?

Web developer and pendulum doesn't have this function.