Well, if you go back to the source of the "left-right" spectrum in France, 1789, the far right were the legislators who supported keeping the monarchy in place rather than form a true democracy in the aftermath of the Revolution.
Discussion
In today's language, if just about anyone is speaking of the "far right" they are referring to people positioned to the "right" of wherever they consider themselves to be, whether that is a hard left progressive socialist talking about ... just about anyone else, or a right leaning libertarian freedom loving human who just wants the stupid federal budget to be balanced. Whatever is to the right of the speaker, that's "far right" to them.