I still prefer firebug over the firefox dev tools. The built in tools look pretty but they aren't that useful to me. I just figured out how to show the style window, but there doesn't seem to be any javascript tools. Where is the console?

edit: After I posted this I figured I should dig deeper before I get all kinds of negative comments. I found the console and also some other useful tools that I didn't know existed. Things like the responsive view and scratch pad are pretty cool.