So for me personally, what I'd really like to see is either one of:
- Match Firebug feature for feature
- Allow for the dev tools to be completely removed from the interface
Sorry, but it really does come down to those two: Whilst the Dev Tools can't replace Firebug, I won't use them. So either allow me to get rid of them, or allow me to switch 100% to them.
Sorry it's not more constructive, but I've no interest in having to juggle between two different debug tools because they both have awesome features. So I don't care what amazing new stuff you might be lining up, I won't use them until all of the functionality I use in Firebug is also available in FF's builtins.