I have the first gen Shield TV (with the clunky old controller and no remote) and wanted to get a decent remote that would work with the interface and offer a keyboard, so I went through a couple of cheapo options on Amazon and finally found one that does everything right.
The first few I tried either had connection or functionality problems, mostly the back buttons didn't work. After a bit of trial and error I found this one:
https://smile.amazon.com/Favormates-Wireless-Keyboard-infrared-Raspberry/dp/B01N0SUUZS
It's got backlighting on the front and back, the android control buttons (home, menu, back) all work, the media controls all work, and the keyboard works with most apps. The microphone doesn't work (that I can figure out) and there are a lot of unused functions, and the airmouse feature is (inherently) clunky and doesn't work great.
Anyways, if you're looking for a cheap replacement remote for your Android TV setup then give this a try, $14 and it's more functional than the $50 official remote.
Directv just sent out all beta users a notice that they can download the fire tv beta from the amazon app store.
I found that if you pull the apk from the fire tv and side load it and the amazon app store onto android tv, it works perfectly.
Steps to install:
Live tv , on demand, cloud dvr, 5.1 , HD all works! It even shows up on the home screen launcher
it was mentioned here 2 weeks ago but only got 3 votes https://www.reddit.com/r/AndroidTV/comments/7mtlkn/firefox_for_android_tv/
you can sideload it from apkmirror here https://www.apkmirror.com/apk/mozilla/firefox-android-tv/firefox-android-tv-1-0-2-release/firefox-android-tv-1-0-2-android-apk-download/
i have tested it on the mibox 6.0 only. runs smooth. launches with a URL bar and under that is 10 boxes of pre-saved bookmarks/shortcuts. you navigate with a big (too big imo but not huge) blue dot on the screen. it jumps about 1/20th of the screen with each click on the remote dpad and it scrolls the page when you get to page edges. when you need to type something, you move the blue dot to the box you want to fill in and hit the ok button on the remote and the onscreen keyboard pops up. you can complete auto-fills by hitting the 'go' on the far right of the keyboard.
incomplete/missing features: no editing the 10 bookmarks/shortcuts. no saving new bookmarks/shortcuts. no changing the blue dot size (minor in the grand scheme of things). there's a pull-out menu that brings up back/forward/refresh but you can only get to it by mouse not remote (left click on left edge of screen while you're browsing and pull it to the right). the remote's back function works fine but can't do forward or refresh. no tabs for multiple instances.
i haven't tried too many sites because i was mainly interested in testing video. i input a sports stream website i use and the video played perfectly. then i checked a site that uses flash video still and that failed. then i tried another site and i got a please disable adblock message so i guess it has adblock built-in. lastly, i tried amazon's site to play video and that failed. it wouldn't play it in the browser and wanted to open an app to do so. i directed it to the play store and it shows the prime app with no options to do anything. so i directed it to aptoidtv to install from there and it installed fine but that version of prime still doesn't work. it will play a video for a bit then have an error on that video while it plays and eventually punts you out of the video.
TLDR fast, adblock, great with remote. no favorites, no tabs, no flash videos, no amazon prime video.
if you play around with it and find something cool, let me/us know.