Copy binaries to respective folders in your PostgreSQL 9.3 install.
This is for PostgreSQL 64-bit
In your database run:

-- If you want to use plv8
CREATE EXTENSION plv8js;

--If you want to use Coffee:
CREATE EXTENSION plcoffee;

-- If you want to use LiveScript
CREATE EXTENSION plls;

compiled with v8 , - v8 version 3.14.5 (git clone -b 3.14.5 https://chromium.googlesource.com/v8/v8.git ) 
and plv8js from 1.4 branch as of 2014/12/29 1.4.2  (https://code.google.com/p/plv8js/source/detail?r=b2f7b3fbe1af5a3406678e463b22a752ac1d2813&name=r1.4)

Compiled using mingw64-w64 GCC 4.8.3 chain (x86_64-win32-seh-rev1, Built by MinGW-W64 project ):
Refer to: https://gist.github.com/robe2/94afc346e301b950aa40  for compilation details