Folks, don't click this link. Go directly to www.amazon.com or your local electronics store.
What's wrong with that link? It points to Toms' Guide, for Pete's sake!
You won't find info on Amazon about how to install Kodi, nor will you in your local store. Your suggestion would be valid if OP was proporing a site where to buy FS from...
There is no difference for the Stick:
- install a file manager on the stick (ES is available on Amazon app store);
- enable "Install apps from unknown sources";
- open a browser, go to Kodi page, download the APK for FireStick;
- open the file manager, and click on the download, it will install, and Kodi icon will go on the home screen.
This is one of the first link searching for "Kodi for amazon fire stick"
You may want to try first older version like 17.x (it works for sure on my Stick), instead of jumping straight to 18