[Fire TV Original Android Development] RiCkLaR:
Thank you so much! Finally have blocked firmware updates, my Cube is on fiirmware PS7646/3550, I had missed the chance to use the last exploit by about a week last time.

In the other/old thread some people asked what else can be disabled besides the OTA apps, so thought I'd share what I've disabled; so here is my list of disabled packages in my Raven:

raven:/ $ pm list packages -d
package:com.android.internal.display.cutout.emulation.corner
package:com.android.internal.display.cutout.emulation.double
package:com.amazon.recess
package:com.amazon.platform.fdrw
package:com.amazon.dummy.settings
package:com.amazon.tv.arc
package:com.amazon.whisperplay.contracts
package:com.android.providers.media
package:com.amazon.device.rdmapplication
package:com.amazon.dcp.contracts.library
package:com.amazon.ftv.xpicker
package:com.amazon.hybridadidservice
package:com.amazon.bueller.photos
package:com.ivona.orchestrator
package:com.amazon.device.logmanager
package:com.amazon.shoptv.firetv.client
package:com.amazon.dpcclient
package:com.amazon.centrix
package:com.amazon.ceviche
package:com.amazon.alta.h2clientservice
package:com.amazon.ftv.screensaver
package:com.amazon.tv.ooberesource
package:com.amazon.dp.logger
package:com.amazon.ods.kindleconnect
package:com.android.providers.downloads.ui
package:com.android.simappdialog
package:com.amazon.sharingservice.android.client.proxy
package:com.amazon.android.marketplace
package:com.android.internal.display.cutout.emulation.tall
package:com.amazon.prism.android.service
package:com.amazon.tifobserver
package:com.amazon.client.metrics.api
package:com.amazon.aca
package:com.amazon.ale
package:com.amazon.dcp
package:com.amazon.neodelegate
package:com.amazon.tv.easyupgrade
package:com.android.nfc
package:com.amazon.tv.csapp
package:com.amazon.logan
package:com.amazon.tahoe
package:com.amazon.ftvads.deeplinking
package:com.amazon.naatyam
package:com.android.settings.intelligence
package:com.amazon.stillwatching.activity
package:com.amazon.a4b.mcc
package:com.amazon.sneakpeek
package:com.amazon.wirelessmetrics.service
package:com.fireos.arcus.proxy
package:com.amazon.tv.fw.metrics
package:com.android.dreams.basic
package:com.amazon.whasettings
package:com.amazon.firehomestarter
package:com.amazon.tv.ffsprovisioneeclient
package:com.amazon.ftv.profilepicker
package:com.amazon.device.metrics
package:com.amazon.tv.ottssocompanionapp
package:com.amazon.device.sale.service
package:com.amazon.dummy.contacts
package:com.svox.pico
package:com.amazon.tv.forcedotaupdater.v2
package:com.amazon.client.metrics
package:com.amazon.minitv.android.app
package:amazon.jackson19
package:com.amazon.tmm.tutorial
package:com.amazon.wha.mediabrowserservice
package:com.amazon.device.software.ota
package:com.amazon.d3
package:com.amazon.tv.developer.dataservice
package:com.amazon.dummy.calendar
package:com.amazon.dcp.contracts.framework.library
package:com.amazon.dummy.gallery
package:com.amazon.tv.support
package:com.amazon.aiondec
package:com.amazon.sync.provider.ipc
package:com.amazon.tv.legal.notices
package:com.amazon.dummy.alarmclock
package:android.amazon.perm
package:com.amazon.kso.blackbird
package:com.amazon.providers.contentsupport
package:com.amazon.hearingaid
package:com.amazon.whisperjoin.middleware.np
package:com.amazon.application.compatibility.enforcer
package:com.amazon.whisperplay.service.install
package:com.ivona.tts.oem
package:com.amazon.tv.launcher
package:com.amazon.shoptv.client
package:com.amazon.device.software.ota.override
package:com.amazon.franktvinput
package:com.amazon.adep
package:com.amazon.whad
package:com.amazon.communication.discovery
package:com.android.traceur
package:com.amazon.tv.releasenotes
package:com.amazon.gamehub
package:com.amazon.cloud9
package:com.amazon.tv.livetv
package:com.amazon.hedwig
package:com.amazon.vizzini.ftvcds
package:com.amazon.dummy.music
package:com.amazon.application.compatibility.enforcer.sdk.library

I don't know if it was mentioned in that thread, but I think I saw someone on Reddit say that it was system package:{com.amazon.adep} that was disabling the latest version of LauncherManager. Though, in my Cube I had previously (months ago) disabled that ADEP package before the attacks on LM started happening, and am still running last years old version of LauncherManager and none of the recent updates had killed LauncherManager or Wolf_Launcher from being my default launcher, guess I was lucky; so don't know for sure if that system-app is the culprit. And then a subsequent firmware update added ADEP to the Protected Package list now.