diff --git a/app/src/main/java/org/mozilla/fenix/FeatureFlags.kt b/app/src/main/java/org/mozilla/fenix/FeatureFlags.kt
index ed9bacea03..0c551e4f3b 100644
--- a/app/src/main/java/org/mozilla/fenix/FeatureFlags.kt
+++ b/app/src/main/java/org/mozilla/fenix/FeatureFlags.kt
@@ -28,4 +28,9 @@ object FeatureFlags {
      * Shows new three-dot toolbar menu design.
      */
     val toolbarMenuFeature = Config.channel.isDebug
+
+    /**
+     * Enables the tabs tray re-write with Synced Tabs.
+     */
+    val tabsTrayRewrite = Config.channel.isNightlyOrDebug
 }
diff --git a/app/src/main/java/org/mozilla/fenix/settings/SecretSettingsFragment.kt b/app/src/main/java/org/mozilla/fenix/settings/SecretSettingsFragment.kt
index 54c91d802c..a61dd26bcd 100644
--- a/app/src/main/java/org/mozilla/fenix/settings/SecretSettingsFragment.kt
+++ b/app/src/main/java/org/mozilla/fenix/settings/SecretSettingsFragment.kt
@@ -6,7 +6,10 @@ package org.mozilla.fenix.settings
 
 import android.os.Bundle
 import androidx.preference.PreferenceFragmentCompat
+import androidx.preference.SwitchPreference
+import org.mozilla.fenix.FeatureFlags
 import org.mozilla.fenix.R
+import org.mozilla.fenix.ext.settings
 import org.mozilla.fenix.ext.showToolbar
 
 class SecretSettingsFragment : PreferenceFragmentCompat() {
@@ -18,5 +21,11 @@ class SecretSettingsFragment : PreferenceFragmentCompat() {
 
     override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
         setPreferencesFromResource(R.xml.secret_settings_preferences, rootKey)
+
+        requirePreference<SwitchPreference>(R.string.pref_key_new_tabs_tray).apply {
+            isVisible = FeatureFlags.tabsTrayRewrite
+            isChecked = context.settings().tabsTrayRewrite
+            onPreferenceChangeListener = SharedPreferenceUpdater()
+        }
     }
 }
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 e458aabb1c..ca1893d7ed 100644
--- a/app/src/main/java/org/mozilla/fenix/utils/Settings.kt
+++ b/app/src/main/java/org/mozilla/fenix/utils/Settings.kt
@@ -26,10 +26,12 @@ import mozilla.components.support.ktx.android.content.longPreference
 import mozilla.components.support.ktx.android.content.stringPreference
 import org.mozilla.fenix.BuildConfig
 import org.mozilla.fenix.Config
+import org.mozilla.fenix.FeatureFlags
 import org.mozilla.fenix.R
 import org.mozilla.fenix.browser.browsingmode.BrowsingMode
 import org.mozilla.fenix.components.metrics.MozillaProductDetector
 import org.mozilla.fenix.components.settings.counterPreference
+import org.mozilla.fenix.components.settings.featureFlagPreference
 import org.mozilla.fenix.components.toolbar.ToolbarPosition
 import org.mozilla.fenix.ext.components
 import org.mozilla.fenix.ext.getPreferenceKey
@@ -319,6 +321,12 @@ class Settings(private val appContext: Context) : PreferencesHolder {
         default = false
     )
 
+    var tabsTrayRewrite by featureFlagPreference(
+        appContext.getPreferenceKey(R.string.pref_key_new_tabs_tray),
+        default = false,
+        featureFlag = FeatureFlags.tabsTrayRewrite
+    )
+
     fun getTabTimeout(): Long = when {
         closeTabsAfterOneDay -> ONE_DAY_MS
         closeTabsAfterOneWeek -> ONE_WEEK_MS
diff --git a/app/src/main/res/values/preference_keys.xml b/app/src/main/res/values/preference_keys.xml
index 35b38f4dd5..885c37b069 100644
--- a/app/src/main/res/values/preference_keys.xml
+++ b/app/src/main/res/values/preference_keys.xml
@@ -236,6 +236,7 @@
     <string name="pref_key_close_tabs_after_one_day" translatable="false">pref_key_close_tabs_after_one_day</string>
     <string name="pref_key_close_tabs_after_one_week" translatable="false">pref_key_close_tabs_after_one_week</string>
     <string name="pref_key_close_tabs_after_one_month" translatable="false">pref_key_close_tabs_after_one_month</string>
+    <string name="pref_key_new_tabs_tray" translatable="false">pref_key_new_tabs_tray</string>
 
     <string name="pref_key_camera_permissions_needed" translatable="false">pref_key_camera_permissions_needed</string>
 
diff --git a/app/src/main/res/values/static_strings.xml b/app/src/main/res/values/static_strings.xml
index 92a50e8290..272359bf5c 100644
--- a/app/src/main/res/values/static_strings.xml
+++ b/app/src/main/res/values/static_strings.xml
@@ -34,6 +34,10 @@
     <string name="preferences_debug_settings">Secret Settings</string>
     <!-- Label for the secret settings preference -->
     <string name="preferences_debug_info" translatable="false">Secret Debug Info</string>
+    <!-- Label for the new tabs tray preference -->
+    <string name="preferences_debug_settings_tabs_tray_rewrite">Use new Tabs Tray</string>
+    <!-- Label for a longer description of the new tabs tray preference -->
+    <string name="preferences_debug_settings_tabs_tray_rewrite_summary">A refactored tabs tray that will include Synced Tabs.</string>
 
     <!-- Label for showing Synced Tabs in the tabs tray -->
     <string name="preferences_debug_synced_tabs_tabs_tray">Show Synced Tabs in the tabs tray</string>
diff --git a/app/src/main/res/xml/secret_settings_preferences.xml b/app/src/main/res/xml/secret_settings_preferences.xml
index c9a243d185..9b61c1e2da 100644
--- a/app/src/main/res/xml/secret_settings_preferences.xml
+++ b/app/src/main/res/xml/secret_settings_preferences.xml
@@ -4,4 +4,10 @@
    - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
 <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto">
+    <SwitchPreference
+        android:defaultValue="false"
+        android:key="@string/pref_key_new_tabs_tray"
+        android:title="@string/preferences_debug_settings_tabs_tray_rewrite"
+        android:summary="@string/preferences_debug_settings_tabs_tray_rewrite_summary"
+        app:iconSpaceReserved="false" />
 </PreferenceScreen>