The first step is to enable installations from unknown sources on your Firestick. Don't worry, it's easier than it sounds! Just head to Settings, click on My Fire TV, and toggle the switch to allow Apps from Unknown Sources. Now you're ready to roll!
Next, you'll need to search for the Downloader App in the Amazon App Store. Simply type in "Downloader" using your Firestick remote, and select the app from the search results. Click Get or Download to start the installation process.