Find File At Point, also known generally as “ffap”, is an intelligent system for opening files and URLs.
The following expression will make Ido guess the context:
(setq ido-use-filename-at-point 'guess)
You can disable URL ffap support by toggling
ido-use-url-at-point.
If the value of this user option is non-nil, Ido will look for
a URL at point. If found, call find-file-at-point to visit it.