Using firebug for jquery? Or something similar?

Been using jquery cycle plug in for a couple years now, always implementing the same way. But for some reason the transitions are messed up on my wordpress site. Is there a way I can try to see what files that function is referencing using firebug? Or is there something similar I can use?

EDIT: Actually figured out the problem but would still like to know how/if firebug can be used for this. Thanks!