https://www.theverge.com/circuitbreaker/2017/11/29/16715086/amazon-fire-tv-silk-web-browser-now-available

You’ll never convince me that using an internet browser on a television set is anything but awkward and bad, but if for whatever reason you’ve been waiting to browse the web on Amazon’s Fire TV devices, the company has answered that call. The Amazon Silk browser, which already comes on Fire tablets, is now available for Amazon Fire TV set-top boxes, sticks, and Fire TV Edition HDTVs. You can download it from the app store on supported devices.

For now, as noted by AFTVnews, support is limited to first- and second-gen Fire TV boxes and the second-gen Stick — plus the Westinghouse/Element 4K TV that runs Amazon’s Fire TV software as its operating system. The most recent Fire TV released this fall can’t yet run the Silk browser; Amazon says an update due in December will fix that.