Remember that some builds are easier to use than others. Since a Kodi build is just a collection of add-ons with a skin slapped on top, adding any of your favorites that weren't included is easy. Follow these 8 easy steps to install your favorite Kodi addons over a build: 1. Open your favorite Kodi build on your Amazon Firestick. 2. Navigate to the Settings menu. 3. Navigate to Add-ons. 4. Allow installations from unknown sources. 5. Navigate back to the Kodi home menu. 6. Add the Add-on source URL to Kodi. 7. Install. 8. Enjoy your favorite shows!