(Chrome devotee here). I spend an hour recently with FF-22 trying to debug a regression in FF by using the built-in dev tools; it seems to lack the ONLY feature that I actually want (and to be honest I feel so bemused that it's not there that I think I'm being dumb and missed it): I can't execute a JS statement in the context of the current stack frame. I'm sure the scratchpad must be able to do this, because otherwise it seems like its the most useless debugging console I've seen in some time.