It appears that the function to call to browse a link in an org-mode file is org-open-at-point which is bound to C-c C-o.

It appears that the function to call to browse a link in an org-mode file is org-open-at-point which is bound to C-c C-o.

Edit: Regarding the follow-up question about opening an org-mode link in a secondary browser, using another function seems to work:

   (defun org-open-at-point-with-firefox ()                              
    (interactive)                                                         
    (let ((browse-url-browser-function 'browse-url-firefox))              
     (org-open-at-point )))