org-activate-links

org-activate-links is a variable defined in `org.el'.
Its value is

(bracket angle plain radio tag date footnote)

Documentation:
Types of links that should be activated in Org-mode files.
This is a list of symbols, each leading to the activation of a certain link
type. In principle, it does not hurt to turn on most link types - there may
be a small gain when turning off unused link types. The types are:

bracket The recommended [[link][description]] or [[link]] links with hiding.
angle Links in angular brackets that may contain whitespace like
.
plain Plain links in normal text, no whitespace, like http://google.com.
radio Text that is matched by a radio target, see manual for details.
tag Tag settings in a headline (link to tag search).
date Time stamps (link to calendar).
footnote Footnote labels.

Changing this variable requires a restart of Emacs to become effective.

You can customize this variable.