Kodi is now release 14.2, the most important plugin is Genesis and this is available in an easy form to add from
http://tvaddons.ag via their custom addon utility with fusion. Be very careful when visiting the site, as it's easy to install unwanted software onto your PC computer, so read the instructions on this website thoroughly before proceeding quickly head first in...
There are several sites that already explain how to install kodi on the Amazon Fire TV, just do a search on the friendly search engine Google for the term "Fire TV kodi wiki", for a great article on installing kodi on this device.
Windows 8 users should be aware that kodi is a great environment for playing all video content including standard video DVD's and its totally free, it includes all the required video codecs. And it is much safer to use kodi than install codecs directly in the browser, as this often results in spyware and virus infections.