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This Windows tool makes it super easy to debloat and cut down ads on your Android TV
(www.androidauthority.com)
This is a most excellent place for technology news and articles.
(On the shield 2019) If you block this domain with your dns ad blocker, the default launcher will only show ads for the YouTube, Google TV, and Google Play Store apps (not individual shows). I find these to be far less annoying as they use muted tones.
androidtvwatsonfe-pa.googleapis.com
If you have already setup your device and currently see ads, you need to reset the android tv home application data to get rid of them. This will temporarily show you the old dashboard, but the new one will load eventually (without ads).
I have this blocked with Blokada locally on my Shield and can confirm it works great. I also prefer the stock launcher just without all the ad junk.
I recently bought a TCL TV with Android TV and I was hoping this trick would work with it but it didn't. So if anyone knows how to make the TCL Android TV launcher interface "stock" and stay that way feel free to point it out.