HD Movie Box is a third-party streaming app which can’t be installed on Firestick directly. You need to sideload it with the help of the downloader app. First of all, you need to enable Apps from Unknown Sources to sideload the HD Movie Box Apk. Step 1: Go to Settings on the Firestick home screen. Step 2: Select My Fire TV. Step 3: Select the Developer Options menu located below the About section. Step 4: Select Apps from Unknown Sources. Step 5: Click Turn On to grant permission for downloading third-party apps. Step 7: Enter the source URL: http://bit.ly/393Jas8 and click the Go button. Step 8: The installer (.apk) file for HD Movie Box app will download on your Firestick. Step 9: Once downloaded, the installation tab will appear on the screen. Click INSTALL to initiate the installation process. Step 10: After installing the app, click the OPEN button to launch the app. Step 11: At the first time of launch, click Allow to read your personal files. Step 12: Select a video player to stream the media contents. By default, you will have an inbuilt Exo Player or you can select third-party players like MX Player or VLC. We recommend you to use, MX Player for better streaming features. Step 13: The home screen of HD Movie Box app will appear on your TV screen. Start streaming your favourite media. Click the settings menu to change default video player & app language, to integrate real-debrid & trakt.tv, and few more options. Thank you for visiting techfollows.com. If you had any queries related to the HD Movie Box app, mentioned in the comments box. Follow us on Facebook and Twitter for regular updates.