My .emacs
contains
(setq browse-url-browser-function 'browse-url-default-macosx-browser)
to open links in .org files via Chrome. The strange thing is that when I hit ftp://... links, they are opened in Firefox. All I found on this is How to make emacs org-mode open links to sites in Google Chrome I checked all the options there, nothing helped.
Note: I'm working on Mac OS X 10.7.3 with Emacs 24.