diff --git a/.experimenter.yaml b/.experimenter.yaml
index 2859851e91..2b3eaeb84f 100644
--- a/.experimenter.yaml
+++ b/.experimenter.yaml
@@ -1,12 +1,4 @@
 ---
-default-browser-message:
-  description: A small feature allowing experiments on the placement of a default browser message.
-  hasExposure: true
-  exposureDescription: ""
-  variables:
-    message-location:
-      type: string
-      description: Where is the message to be put.
 engine-settings:
   description: Contains a set of settings for controlling the web engine configurations.
   hasExposure: true
diff --git a/app/lint-baseline.xml b/app/lint-baseline.xml
index 646548a2f0..79ebdd92e8 100644
--- a/app/lint-baseline.xml
+++ b/app/lint-baseline.xml
@@ -1668,17 +1668,6 @@
             column="18"/>
     </issue>
 
-    <issue
-        id="ContentDescription"
-        message="Missing `contentDescription` attribute on image"
-        errorLine1="    &lt;ImageView"
-        errorLine2="     ~~~~~~~~~">
-        <location
-            file="src/main/res/layout/default_browser_experiment_preference.xml"
-            line="14"
-            column="6"/>
-    </issue>
-
     <issue
         id="ContentDescription"
         message="Missing `contentDescription` attribute on image"
diff --git a/app/src/main/java/org/mozilla/fenix/components/toolbar/DefaultToolbarMenu.kt b/app/src/main/java/org/mozilla/fenix/components/toolbar/DefaultToolbarMenu.kt
index aac4623ee2..27869b64bf 100644
--- a/app/src/main/java/org/mozilla/fenix/components/toolbar/DefaultToolbarMenu.kt
+++ b/app/src/main/java/org/mozilla/fenix/components/toolbar/DefaultToolbarMenu.kt
@@ -38,7 +38,6 @@ import org.mozilla.fenix.R
 import org.mozilla.fenix.components.accounts.FenixAccountManager
 import org.mozilla.fenix.ext.components
 import org.mozilla.fenix.ext.settings
-import org.mozilla.fenix.nimbus.MessageSurfaceId
 import org.mozilla.fenix.theme.ThemeManager
 
 /**
@@ -364,7 +363,6 @@ open class DefaultToolbarMenu(
 
     @VisibleForTesting(otherwise = PRIVATE)
     val coreMenuItems by lazy {
-        val defaultBrowserItem = getSetDefaultBrowserItem()
         val menuItems =
             listOfNotNull(
                 if (shouldUseBottomToolbar) null else menuToolbar,
@@ -376,8 +374,6 @@ open class DefaultToolbarMenu(
                 extensionsItem,
                 syncMenuItem,
                 BrowserMenuDivider(),
-                defaultBrowserItem,
-                defaultBrowserItem?.let { BrowserMenuDivider() },
                 findInPageItem,
                 desktopSiteItem,
                 customizeReaderView.apply { visible = ::shouldShowReaderViewCustomization },
@@ -449,20 +445,4 @@ open class DefaultToolbarMenu(
                 .any { it.url == newUrl }
         }
     }
-
-    private fun getSetDefaultBrowserItem(): BrowserMenuImageText? {
-        val settings = context.components.settings
-        return if (
-            settings.isDefaultBrowserMessageLocation(MessageSurfaceId.APP_MENU_ITEM)
-        ) {
-            BrowserMenuImageText(
-                label = context.getString(R.string.preferences_set_as_default_browser),
-                imageResource = R.mipmap.ic_launcher
-            ) {
-                onItemTapped.invoke(ToolbarMenu.Item.SetDefaultBrowser)
-            }
-        } else {
-            null
-        }
-    }
 }
diff --git a/app/src/main/java/org/mozilla/fenix/settings/SettingsFragment.kt b/app/src/main/java/org/mozilla/fenix/settings/SettingsFragment.kt
index 45a68c324a..e13a66d1ea 100644
--- a/app/src/main/java/org/mozilla/fenix/settings/SettingsFragment.kt
+++ b/app/src/main/java/org/mozilla/fenix/settings/SettingsFragment.kt
@@ -5,7 +5,6 @@
 package org.mozilla.fenix.settings
 
 import android.annotation.SuppressLint
-import android.app.Activity
 import android.content.ActivityNotFoundException
 import android.content.DialogInterface
 import android.content.Intent
@@ -51,11 +50,9 @@ import org.mozilla.fenix.ext.getPreferenceKey
 import org.mozilla.fenix.ext.navigateToNotificationsSettings
 import org.mozilla.fenix.ext.requireComponents
 import org.mozilla.fenix.ext.settings
-import org.mozilla.fenix.ext.REQUEST_CODE_BROWSER_ROLE
 import org.mozilla.fenix.ext.openSetDefaultBrowserOption
 import org.mozilla.fenix.ext.showToolbar
 import org.mozilla.fenix.nimbus.FxNimbus
-import org.mozilla.fenix.nimbus.MessageSurfaceId
 import org.mozilla.fenix.perf.ProfilerViewModel
 import org.mozilla.fenix.settings.account.AccountUiView
 import org.mozilla.fenix.utils.BrowsersCache
@@ -160,23 +157,9 @@ class SettingsFragment : PreferenceFragmentCompat() {
     }
 
     override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
-        val preferencesId = getPreferenceLayoutId()
-
-        setPreferencesFromResource(preferencesId, rootKey)
-        updateMakeDefaultBrowserPreference()
+        setPreferencesFromResource(R.xml.preferences, rootKey)
     }
 
-    /**
-     * @return The preference layout to be used depending on flags and existing experiment branches.
-     * Note: Changing Settings screen before experiment is over requires changing all layouts.
-     */
-    private fun getPreferenceLayoutId() =
-        if (isDefaultBrowserExperimentBranch()) {
-            R.xml.preferences_default_browser_experiment
-        } else {
-            R.xml.preferences
-        }
-
     @SuppressLint("RestrictedApi")
     override fun onResume() {
         super.onResume()
@@ -250,8 +233,6 @@ class SettingsFragment : PreferenceFragmentCompat() {
                 requireComponents.backgroundServices.accountManager.accountProfile()
             )
         }
-
-        updateMakeDefaultBrowserPreference()
     }
 
     @SuppressLint("InflateParams")
@@ -520,23 +501,6 @@ class SettingsFragment : PreferenceFragmentCompat() {
         }
     }
 
-    @Suppress("DEPRECATION")
-    // https://github.com/mozilla-mobile/fenix/issues/19919
-    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
-        super.onActivityResult(requestCode, resultCode, data)
-
-        // If the user made us the default browser, update the switch
-        if (resultCode == Activity.RESULT_OK && requestCode == REQUEST_CODE_BROWSER_ROLE) {
-            updateMakeDefaultBrowserPreference()
-        }
-    }
-
-    private fun updateMakeDefaultBrowserPreference() {
-        if (!isDefaultBrowserExperimentBranch()) {
-            requirePreference<DefaultBrowserPreference>(R.string.pref_key_make_default_browser).updateSwitch()
-        }
-    }
-
     private fun navigateFromSettings(directions: NavDirections) {
         view?.findNavController()?.let { navController ->
             if (navController.currentDestination?.id == R.id.settingsFragment) {
@@ -656,9 +620,6 @@ class SettingsFragment : PreferenceFragmentCompat() {
         }
     }
 
-    private fun isDefaultBrowserExperimentBranch(): Boolean =
-        requireContext().settings().isDefaultBrowserMessageLocation(MessageSurfaceId.SETTINGS)
-
     private fun isFirefoxDefaultBrowser(): Boolean {
         val browsers = BrowsersCache.all(requireContext())
         return browsers.isFirefoxDefaultBrowser
diff --git a/app/src/main/java/org/mozilla/fenix/utils/Settings.kt b/app/src/main/java/org/mozilla/fenix/utils/Settings.kt
index 026a90d248..0a6c8693dd 100644
--- a/app/src/main/java/org/mozilla/fenix/utils/Settings.kt
+++ b/app/src/main/java/org/mozilla/fenix/utils/Settings.kt
@@ -42,10 +42,8 @@ import org.mozilla.fenix.components.settings.lazyFeatureFlagPreference
 import org.mozilla.fenix.components.toolbar.ToolbarPosition
 import org.mozilla.fenix.ext.components
 import org.mozilla.fenix.ext.getPreferenceKey
-import org.mozilla.fenix.nimbus.DefaultBrowserMessage
 import org.mozilla.fenix.nimbus.FxNimbus
 import org.mozilla.fenix.nimbus.HomeScreenSection
-import org.mozilla.fenix.nimbus.MessageSurfaceId
 import org.mozilla.fenix.settings.PhoneFeature
 import org.mozilla.fenix.settings.deletebrowsingdata.DeleteBrowsingDataOnQuitType
 import org.mozilla.fenix.settings.logins.SavedLoginsSortingStrategyMenu
@@ -314,20 +312,6 @@ class Settings(private val appContext: Context) : PreferencesHolder {
         default = false
     )
 
-    private val defaultBrowserFeature: DefaultBrowserMessage by lazy {
-        FxNimbus.features.defaultBrowserMessage.value()
-    }
-
-    fun isDefaultBrowserMessageLocation(surfaceId: MessageSurfaceId): Boolean =
-        defaultBrowserFeature.messageLocation?.let { experimentalSurfaceId ->
-            if (experimentalSurfaceId == surfaceId) {
-                val browsers = BrowsersCache.all(appContext)
-                !browsers.isFirefoxDefaultBrowser
-            } else {
-                false
-            }
-        } ?: false
-
     var gridTabView by booleanPreference(
         appContext.getPreferenceKey(R.string.pref_key_tab_view_grid),
         default = true
diff --git a/app/src/main/res/drawable/rounded_button_background.xml b/app/src/main/res/drawable/rounded_button_background.xml
deleted file mode 100644
index 63845527d5..0000000000
--- a/app/src/main/res/drawable/rounded_button_background.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<ripple xmlns:android="http://schemas.android.com/apk/res/android"
-        android:color="?android:attr/colorControlHighlight">
-    <item android:id="@android:id/mask">
-        <shape>
-            <solid android:color="#000000" />
-            <corners android:radius="4dp" />
-        </shape>
-    </item>
-    <item>
-        <shape android:shape="rectangle">
-            <solid android:color="?actionPrimary" />
-            <corners android:radius="4dp" />
-        </shape>
-    </item>
-</ripple>
diff --git a/app/src/main/res/layout/default_browser_experiment_preference.xml b/app/src/main/res/layout/default_browser_experiment_preference.xml
deleted file mode 100644
index b3777a25fe..0000000000
--- a/app/src/main/res/layout/default_browser_experiment_preference.xml
+++ /dev/null
@@ -1,48 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-<androidx.constraintlayout.widget.ConstraintLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    style="@style/OnboardingCardLightWithPadding"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:layout_marginVertical="8dp"
-    android:layout_marginHorizontal="24dp">
-
-    <ImageView
-        android:id="@+id/app_icon"
-        android:layout_width="32dp"
-        android:layout_height="32dp"
-        app:layout_constraintEnd_toStartOf="@id/description_text"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent"
-        app:srcCompat="@drawable/ic_firefox" />
-
-    <TextView
-        android:id="@+id/description_text"
-        android:layout_width="0dp"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="12dp"
-        android:layout_marginBottom="16dp"
-        android:text="@string/default_browser_experiment_card_text"
-        android:textAppearance="@style/Body14TextStyle"
-        app:layout_constraintBottom_toTopOf="@id/set_default_browser"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toEndOf="@id/app_icon"
-        app:layout_constraintTop_toTopOf="parent" />
-
-    <Button
-        android:id="@+id/set_default_browser"
-        style="@style/PositiveButton"
-        android:layout_height="36dp"
-        android:background="@drawable/rounded_button_background"
-        android:clickable="false"
-        android:focusable="false"
-        android:text="@string/preferences_set_as_default_browser"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/description_text" />
-</androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/app/src/main/res/xml/preferences_default_browser_experiment.xml b/app/src/main/res/xml/preferences_default_browser_experiment.xml
deleted file mode 100644
index b31b0a5650..0000000000
--- a/app/src/main/res/xml/preferences_default_browser_experiment.xml
+++ /dev/null
@@ -1,216 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-
-<androidx.preference.PreferenceScreen
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto">
-
-    <androidx.preference.Preference
-        android:key="@string/pref_key_make_default_browser"
-        android:layout="@layout/default_browser_experiment_preference"
-        app:allowDividerBelow="false" />
-
-    <androidx.preference.SwitchPreference
-        android:defaultValue="true"
-        android:key="@string/pref_key_allow_domestic_china_fxa_server"
-        android:title="@string/preferences_allow_domestic_china_fxa_server" />
-
-    <androidx.preference.EditTextPreference
-        android:inputType="textUri"
-        android:key="@string/pref_key_override_fxa_server"
-        android:title="@string/preferences_override_fxa_server"
-        app:iconSpaceReserved="false"
-        app:isPreferenceVisible="false" />
-
-    <androidx.preference.EditTextPreference
-        android:inputType="textUri"
-        android:key="@string/pref_key_override_sync_tokenserver"
-        android:title="@string/preferences_override_sync_tokenserver"
-        app:iconSpaceReserved="false"
-        app:isPreferenceVisible="false" />
-
-    <androidx.preference.PreferenceCategory
-        android:layout="@layout/preference_category_no_icon_style"
-        android:title="@string/preferences_category_general">
-        <androidx.preference.Preference
-            android:key="@string/pref_key_search_settings"
-            android:title="@string/preferences_search"
-            app:iconSpaceReserved="false" />
-
-        <androidx.preference.Preference
-            android:key="@string/pref_key_tabs"
-            android:title="@string/preferences_tabs"
-            app:iconSpaceReserved="false" />
-
-        <androidx.preference.Preference
-            app:iconSpaceReserved="false"
-            android:key="@string/pref_key_home"
-            android:title="@string/preferences_home_2" />
-
-        <androidx.preference.Preference
-            android:key="@string/pref_key_customize"
-            android:title="@string/preferences_customize"
-            app:iconSpaceReserved="false" />
-
-        <androidx.preference.Preference
-            android:key="@string/pref_key_passwords"
-            android:title="@string/preferences_passwords_logins_and_passwords"
-            app:iconSpaceReserved="false" />
-
-        <androidx.preference.Preference
-            android:key="@string/pref_key_credit_cards"
-            android:title="@string/preferences_credit_cards"
-            app:iconSpaceReserved="false" />
-
-        <androidx.preference.Preference
-            android:key="@string/pref_key_accessibility"
-            android:title="@string/preferences_accessibility"
-            app:iconSpaceReserved="false" />
-
-        <androidx.preference.Preference
-            android:key="@string/pref_key_language"
-            android:title="@string/preferences_language"
-            app:iconSpaceReserved="false" />
-
-    </androidx.preference.PreferenceCategory>
-
-    <androidx.preference.PreferenceCategory
-        android:key="@string/pref_key_sign_in"
-        android:layout="@layout/preference_category_no_icon_style"
-        android:title="@string/preferences_category_account">
-        <androidx.preference.Preference
-            android:key="@string/pref_key_sign_in"
-            android:title="@string/preferences_sync"
-            app:allowDividerBelow="true"
-            app:iconSpaceReserved="false" />
-    </androidx.preference.PreferenceCategory>
-
-    <androidx.preference.PreferenceCategory
-        android:key="@string/pref_key_account_category"
-        android:layout="@layout/preference_category_no_icon_style"
-        android:title="@string/preferences_category_account"
-        app:isPreferenceVisible="false">
-
-        <org.mozilla.fenix.settings.account.AccountPreference
-            android:key="@string/pref_key_account"
-            app:iconSpaceReserved="false"/>
-
-        <org.mozilla.fenix.settings.account.AccountAuthErrorPreference
-            android:key="@string/pref_key_account_auth_error"
-            app:iconSpaceReserved="false"/>
-
-    </androidx.preference.PreferenceCategory>
-
-    <androidx.preference.PreferenceCategory
-        android:layout="@layout/preference_category_no_icon_style"
-        android:title="@string/preferences_category_privacy_security">
-
-        <androidx.preference.Preference
-            android:key="@string/pref_key_private_browsing"
-            android:title="@string/preferences_private_browsing_options"
-            app:iconSpaceReserved="false" />
-
-        <androidx.preference.Preference
-            android:key="@string/pref_key_tracking_protection_settings"
-            android:title="@string/preference_enhanced_tracking_protection"
-            app:iconSpaceReserved="false" />
-
-        <androidx.preference.Preference
-            android:key="@string/pref_key_site_permissions"
-            android:title="@string/preferences_site_permissions"
-            app:iconSpaceReserved="false" />
-
-        <androidx.preference.Preference
-            android:key="@string/pref_key_delete_browsing_data"
-            android:title="@string/preferences_delete_browsing_data"
-            app:iconSpaceReserved="false" />
-
-        <androidx.preference.Preference
-            android:key="@string/pref_key_delete_browsing_data_on_quit_preference"
-            android:title="@string/preferences_delete_browsing_data_on_quit"
-            app:iconSpaceReserved="false" />
-
-        <androidx.preference.Preference
-            android:key="@string/pref_key_notifications"
-            android:title="@string/preferences_notifications"
-            app:iconSpaceReserved="false" />
-
-        <androidx.preference.Preference
-            android:key="@string/pref_key_data_choices"
-            android:title="@string/preferences_data_collection"
-            app:iconSpaceReserved="false" />
-
-    </androidx.preference.PreferenceCategory>
-
-    <PreferenceCategory
-        android:key="@string/pref_key_advanced"
-        android:layout="@layout/preference_category_no_icon_style"
-        android:title="@string/preferences_category_advanced">
-        <androidx.preference.Preference
-            android:key="@string/pref_key_addons"
-            android:title="@string/preferences_addons"
-            app:iconSpaceReserved="false" />
-
-        <androidx.preference.Preference
-            android:key="@string/pref_key_override_amo_collection"
-            android:title="@string/preferences_customize_amo_collection"
-            app:iconSpaceReserved="false" />
-
-        <androidx.preference.SwitchPreference
-            android:defaultValue="false"
-            android:key="@string/pref_key_open_links_in_external_app"
-            android:title="@string/preferences_open_links_in_apps"
-            app:iconSpaceReserved="false" />
-
-        <androidx.preference.SwitchPreference
-            android:defaultValue="false"
-            android:key="@string/pref_key_external_download_manager"
-            android:title="@string/preferences_external_download_manager"
-            app:iconSpaceReserved="false" />
-
-        <androidx.preference.SwitchPreference
-            android:defaultValue="true"
-            android:key="@string/pref_key_leakcanary"
-            android:title="@string/preference_leakcanary"
-            app:iconSpaceReserved="false"
-            app:isPreferenceVisible="@bool/IS_DEBUG" />
-
-        <androidx.preference.SwitchPreference
-            android:defaultValue="false"
-            android:key="@string/pref_key_remote_debugging"
-            android:title="@string/preferences_remote_debugging"
-            app:iconSpaceReserved="false" />
-    </PreferenceCategory>
-
-    <androidx.preference.PreferenceCategory
-        android:layout="@layout/preference_category_no_icon_style"
-        android:title="@string/preferences_category_about"
-        app:iconSpaceReserved="false">
-        <androidx.preference.Preference
-            android:key="@string/pref_key_rate"
-            android:title="@string/preferences_rate"
-            app:iconSpaceReserved="false" />
-
-        <androidx.preference.Preference
-            android:key="@string/pref_key_about"
-            android:title="@string/preferences_about"
-            app:iconSpaceReserved="false" />
-
-        <androidx.preference.Preference
-            android:key="@string/pref_key_debug_settings"
-            android:title="@string/preferences_debug_settings"
-            app:iconSpaceReserved="false"
-            app:isPreferenceVisible="false" />
-        <androidx.preference.Preference
-            android:key="@string/pref_key_secret_debug_info"
-            android:title="@string/preferences_debug_info"
-            app:iconSpaceReserved="false"
-            app:isPreferenceVisible="false" />
-        <androidx.preference.Preference
-            android:key="@string/pref_key_nimbus_experiments"
-            android:title="@string/preferences_nimbus_experiments"
-            app:isPreferenceVisible="false" />
-    </androidx.preference.PreferenceCategory>
-</androidx.preference.PreferenceScreen>
diff --git a/nimbus.fml.yaml b/nimbus.fml.yaml
index 58f3edb694..81cd9979e4 100644
--- a/nimbus.fml.yaml
+++ b/nimbus.fml.yaml
@@ -63,13 +63,6 @@ features:
       - channel: developer
         value:
           enabled: true
-  default-browser-message:
-    description: A small feature allowing experiments on the placement of a default browser message.
-    variables:
-      message-location:
-        description: Where is the message to be put.
-        type: Option<MessageSurfaceId>
-        default: null
   messaging:
     description: |
       Configuration for the messaging system.