Yeah, we've been thinking a lot about that lately. Not a priority though (yet?).
> An aggregate repaint view
I filed a platform bug just about that today :) I think it can be done soon.
> An intelligent debugger that would automatically step over certain files
That's interesting. I never thought about this. I like that.
> That's interesting. I never thought about this. I like that.
You haven't been reading your mail, paul!
We discussed this briefly in https://groups.google.com/d/topic/mozilla.dev.developer-tool... and are planning to work it in to our schedule.