#+BEGIN_SRC emacs-lisp

(org-link-set-parameters

 "red"

 :follow (lambda (path) (message "You clicked me."))

 :export (lambda (path desc backend)

           (cond

            ((eq 'html backend)

             (format "<font color=\"red\">%s</font>"

                     (or desc path)))))

 :face '(:foreground "red")

 :help-echo "Click me for a message.")

#+END_SRC

#+RESULTS:

should make this link -> red:test 

have a red face with a tooltip, but it is just a blue org-link face with the standard tooltip. The follow and export function seems to work, but not the face and help-echo.

I think this is related to the consolidation of org-activate-links. In the properties section it incorrectly uses code like: (org-link-get-parameter type :face) where type is defined as plain/bracket/... etc. That code should be replaced with this, which gets the link-type from (link-type (org-element-property :type link-object)) and replaces type with link-type.

This is around line 5982 in org.el