Summarize this article in one sentence.
Select the "Search" tab, which resembles a magnifying glass in the upper-left corner of the screen. A text box will appear. As you type, you'll see a progressively shorter list of app suggestions below the on-screen keyboard. It should be the only app suggestion below the keyboard. Doing so searches the app store for the Downloader app. This is an orange box with the word "Downloader" and a giant arrow on it. Selecting this app will open its app page. It's on the left side of the screen, just below the Downloader app description. This will begin downloading the Downloader app onto your Fire TV. Once the Downloader app finishes downloading, this option will appear; select it to open the Downloader app, from which point you can download the Kodi app.

Summary:
Open Search. Type downloader into Search. Select Downloader. Select the Downloader app. Select Get it or Download. Select Open.