Probably has something to do with Google pulling app. has announced that all users of Fire TV devices will now be able to browser the web
Exclusive: is working on a Silk Web Browser for the Fire TV
Fire TV gets Firefox support, will let you watch videos - India Today
Exclusive: is working on a Silk Web Browser for the Fire TV
Mozilla Firefox ends support for Fire TV, Echo Show, CIO News, ET CIO
Mozilla is shutting down Firefox for Fire TV and Echo Show devices
brings Firefox and Silk support to Fire TV - news
Fire TV gets Firefox and Silk web browsers support
How to Install a Web Browser on Fire Stick
Firefox will no longer support 's Fire TV or Echo Show devices on April 30th - The Verge
releases their Silk Web Browser for the Fire TV
Fire TV Stick 4K (2nd Gen) Review: Is it worth the upgrade? - Dignited
Mozilla drops Firefox support on Fire TV
Fire TV Stick 4K review: The best streaming dongle for the money
How to Use Web Browser on Fire TV [Step by Step] - Alvaro Trigo's Blog
Firefox and Silk Web Browsers on the Fire TV