[Fire HD 8 and HD 10 General] :
Go in your command line, type

adb shell

then copy this and paste it all at once in your command line

pm uninstall --user 0 amazon.alexa.tablet
pm uninstall --user 0 amazon.jackson19
pm uninstall --user 0 com.amazon.advertisingidsettings
pm uninstall --user 0 com.amazon.ags.app
pm uninstall --user 0 com.amazon.alta.h2clientservice
pm uninstall --user 0 com.amazon.calculator
pm uninstall --user 0 com.amazon.camera
pm uninstall --user 0 com.amazon.client.metrics
pm uninstall --user 0 com.amazon.cloud9
pm uninstall --user 0 com.amazon.cloud9.contentservice
pm uninstall --user 0 com.amazon.cloud9.kids
pm uninstall --user 0 com.amazon.cloud9.systembrowserprovider
pm uninstall --user 0 com.amazon.csapp
pm uninstall --user 0 com.amazon.dee.app
pm uninstall --user 0 com.amazon.device.backup
pm uninstall --user 0 com.amazon.device.backup.sdk.internal.library
pm uninstall --user 0 com.amazon.device.crashmanager
pm uninstall --user 0 com.amazon.device.logmanager
pm uninstall --user 0 com.amazon.device.software.ota
pm uninstall --user 0 com.amazon.device.sync
pm uninstall --user 0 com.amazon.device.sync.sdk.internal
pm uninstall --user 0 com.amazon.dp.contacts
pm uninstall --user 0 com.amazon.dp.fbcontacts
pm uninstall --user 0 com.amazon.dp.logger
pm uninstall --user 0 com.amazon.geo.client.maps
pm uninstall --user 0 com.amazon.geo.mapsv2
pm uninstall --user 0 com.amazon.geo.mapsv2.services
pm uninstall --user 0 com.amazon.h2settingsfortablet
pm uninstall --user 0 com.amazon.kcp.tutorial
pm uninstall --user 0 com.amazon.kindle
pm uninstall --user 0 com.amazon.kindle.devicecontrols
pm uninstall --user 0 com.amazon.kindle.kso
pm uninstall --user 0 com.amazon.kindle.otter.oobe.forced.ota
pm uninstall --user 0 com.amazon.kindle.otter.settings
pm uninstall --user 0 com.amazon.kindle.personal_video
pm uninstall --user 0 com.amazon.kindle.unifiedSearch
pm uninstall --user 0 com.amazon.legalsettings
pm uninstall --user 0 com.amazon.logan
pm uninstall --user 0 com.amazon.mp3
pm uninstall --user 0 com.amazon.ods.kindleconnect
pm uninstall --user 0 com.amazon.parentalcontrols
pm uninstall --user 0 com.amazon.photos
pm uninstall --user 0 com.amazon.photos.importer
pm uninstall --user 0 com.amazon.pm
pm uninstall --user 0 com.amazon.precog
pm uninstall --user 0 com.amazon.readynowcore
pm uninstall --user 0 com.amazon.recess
pm uninstall --user 0 com.amazon.socialplatform
pm uninstall --user 0 com.amazon.tahoe
pm uninstall --user 0 com.amazon.unifiedshare.actionchooser
pm uninstall --user 0 com.amazon.unifiedsharefacebook
pm uninstall --user 0 com.amazon.unifiedsharegoodreads
pm uninstall --user 0 com.amazon.unifiedsharesinaweibo
pm uninstall --user 0 com.amazon.unifiedsharetwitter
pm uninstall --user 0 com.amazon.vans.alexatabletshopping.app
pm uninstall --user 0 com.amazon.venezia
pm uninstall --user 0 com.amazon.weather
pm uninstall --user 0 com.amazon.webapp
pm uninstall --user 0 com.amazon.webview
pm uninstall --user 0 com.amazon.webview.chromium
pm uninstall --user 0 com.amazon.webview.metrics.service
pm uninstall --user 0 com.amazon.whisperlink.activityview.android
pm uninstall --user 0 com.amazon.whisperlink.core.android
pm uninstall --user 0 com.amazon.whisperplay.contracts
pm uninstall --user 0 com.amazon.windowshop
pm uninstall --user 0 com.android.backupconfirm
pm uninstall --user 0 com.android.calendar
pm uninstall --user 0 com.android.contacts
pm uninstall --user 0 com.android.deskclock
pm uninstall --user 0 com.android.email
pm uninstall --user 0 com.android.inputmethod.latin
pm uninstall --user 0 com.android.music
pm uninstall --user 0 com.android.printspooler
pm uninstall --user 0 com.android.providers.calendar
pm uninstall --user 0 com.android.providers.contacts
pm uninstall --user 0 com.android.providers.userdictionary
pm uninstall --user 0 com.android.sharedstoragebackup
pm uninstall --user 0 com.audible.application.kindle
pm uninstall --user 0 com.goodreads.kindle
pm uninstall --user 0 com.here.odnp.service
pm uninstall --user 0 com.kingsoft.office.amz
pm uninstall --user 0 jp.co.omronsoft.iwnnime.languagepack.zhcn_az
pm uninstall --user 0 jp.co.omronsoft.iwnnime.mlaz
pm uninstall --user 0 org.mopria.printplugin