[Fire TV General] Skel40:
TEST IN PROGRESS.

Use adb shell, su, pm disable. If you want to remove the packages that are safe to remove, download and install Total Commander, navigate to File system root, /system/priv-app, delete the folders pertaining to the remove list below. Some of these packages that can be removed isn't a guaranteed. I take no responsibility what you choose with your device. This is a test project I'm experimenting on and you are fully responsible with what you do while following this guide. (ATTENTION: If you do end up messing up please consider backing up your device or have a prerooted rom handy in case bricking occurs. Just flash a prerooted rom on top of the bad system although its recommended to clear the dalvik cache and cache afterwards.

All packages (with explanations, in alphabetical order, with paths to limit confusion):

ACA client

(???, safe to remove)

(Path: /system/priv-app/com.amazon.aca)

com.amazon.aca

ALE

(???, safe to remove)

(Path: /system/priv-app/com.amazon.ale)

com.amazon.ale

Alexa

(Used for voice, deactivates voice recognition if disabled and uninstalled, safe to remove if Alexa is not wanted, safe to remove)

(Path: /system/priv-app/com.amazon.vizzini)

com.amazon.vizzini

Alexa Media Controller

(???, safe to remove)

(Path: /system/priv-app/com.amazon.alexa.externalmediaplayer.fireos)

com.amazon.alexa.externalmediaplayer.fireos

Alexa Notifications

(In charge of notifications sent out by Alexa, safe to remove)

(Path: /system/priv-app/com.amazon.tv.alexanotifications)

com.amazon.tv.alexanotifications

Alexa Shopping

(Used to shop on Amazon with Alexa functionality, safe to remove)

(Path: /system/priv-app/com.amazon.alexashopping)

com.amazon.alexashopping

Alexa Video Player

(???, somehow it breaks movie trailers from playing as I did more testing)

(Path: /system/priv-app/com.amazon.cardinal)

com.amazon.cardinal

Alexa Voice Layer

(???, in charge of voice input as backup???, safe to remove)

(Path: /system/priv-app/com.amazon.avl.firetv)

com.amazon.avl.firetv

Amazon Backup and Restore Internal SDK

(???, responsible for backing up system in the OS???, safe to remove)

(Path: /system/priv-app/DeviceBackupAndRestoreInternalSDK-release)

com.amazon.device.backup.sdk.internal.library

Amazon Bluetooth DFU

(???, responsible for bluetooth connections???, safe to remove)

(Path: /system/priv-app/com.amazon.device.bluetoothdfu)

com.amazon.bluetoothdfu

Amazon Communication Services

(Used to make device communications, can be disabled, uninstalling breaks movie trailer functionality, can be removed)

(Path: /system/priv-app/com.amazon.tcomm)

com.amazon.tcomm

Amazon Communication Services Client Library

(Same situation)

(Path: /system-priv-app/com.amazon.communication)

com.amazon.tcomm.client

Android Device Messaging (ADM)

(Can be uninstalled, breaks movie trailer functionality, keep enabled if wanted to)

(Path: /system/priv-app/DeviceMessagingAndroid)

com.amazon.device.messaging

Amazon Device Messaging Internal SDK

(Same situation)

(Path:/system/priv-app/DeviceMessagingAndroidInternalSDK)

com.amazon.device.messaging.sdk.internal.library

Amazon Device Messaging SDK

(Same situation)

(Path: /system/priv-app/DeviceMessagingAndroidSDK)

com.amazon.device.messaging.sdk.library

Amazon Device Middleware Debugging Tool

(???, safe to remove)

(Path: /system/priv-app/FireOsMiddlewareDebugApp)

com.amazon.dcp

Amazon Device Settings

(Breaks settings and other settings on the Fire TV home screen, except for Equipment Control since its, its own app)

(Path: /system/priv-app/RemoteSettingsAndroid)

com.amazon.device.settings

Amazon Device Settings Internal SDK

(Same situation)

(Path:/system/priv-app/RemoteSettingsInternalSDK)

com.amazon.device.settings.sdk.internal.library

Amazon FreeTime

(Safe to remove, install system components to get it working again, its disabled by default as stub.apk, closes endlessly when installed from the Amazon Appstore)

(Path: /system/priv-app/com.amazon.tahoe)

com.amazon.tahoe

Amazon Metrics Service Application

(???, safe to remove)

(Path: /system/priv-app/MetricsService)

Amazon Music

(Safe to remove, can be installed again in the Amazon Appstore)

(Path: /system/priv-app/com.amazon.bueller.music)

com.amazon.bueller.music

Amazon Photos

(Same thing)

(Path: /system/priv-app/com.amazon.bueller.photos)

Amazon Recess

(???, says its a proxy in its name, safe to remove)

(Path: /system/priv-app/FireRecessProxy)

com.amazon.recess

Amazon Settings Core

(Goes with device settings listed above, should keep)

(Path: /system/priv-app/com.amazon.tv.settings.core)

com.amazon.tv.settings.core

Amazon System WebView

(Responsible for top right banner where content is shown, may be wrong)

(Path: /system/app/AmazonWebView)

com.amazon.webview.chromium

That's all for now again this is a test in progress project, stay tuned for more updates and better performance for the 4K Fire TV Stick.