https://www.theverge.com/circuitbreaker/2018/10/26/18027006/alexa-fire-tv-apps-amazon-voice-control-navigate-menuu

Amazon is rolling out a new feature to its Fire TV Cube, which lets users navigate around third-party apps like Hulu and Netflix with voice controls, via AFTVNews.

The new feature works like it says on the can: instead of using a remote to navigate menus, you’ll be able to use voice commands that emulate the buttons on a remote. So if you can’t find the remote, you’ll be able to navigate apps by asking Alexa to “Move right / left / up / down” and select the highlighted option with “Alexa, select.” There are also “Alexa, scroll” options for quickly navigating through menus.