The second one would only work if you’ve got the RSP plugin enabled… the “save” is ok (browsers don’t talk the binary daap communications protocol, but that there’s an answer shows that its able to connect).
Idea: which mt-daapd/Firefly version did you install? RSP has been in there for some time, but probably wasn’t part of the 0.2.4 stable release… if you tried that, its quite outdated actually 😉