diff --git a/mobile/android/base/BrowserLocaleManager.java b/mobile/android/base/BrowserLocaleManager.java
index c5433a02bdda..b77e56d61bcb 100644
--- a/mobile/android/base/BrowserLocaleManager.java
+++ b/mobile/android/base/BrowserLocaleManager.java
@@ -16,6 +16,7 @@ import java.util.concurrent.atomic.AtomicReference;
 import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;
+import org.mozilla.gecko.annotation.ReflectionTarget;
 import org.mozilla.gecko.util.GeckoJarReader;
 
 import android.content.BroadcastReceiver;
@@ -61,6 +62,7 @@ public class BrowserLocaleManager implements LocaleManager {
 
     private static final AtomicReference<LocaleManager> instance = new AtomicReference<LocaleManager>();
 
+    @ReflectionTarget
     public static LocaleManager getInstance() {
         LocaleManager localeManager = instance.get();
         if (localeManager != null) {
diff --git a/mobile/android/base/Locales.java b/mobile/android/base/Locales.java
index 8b3c0538875d..902bb5fd3060 100644
--- a/mobile/android/base/Locales.java
+++ b/mobile/android/base/Locales.java
@@ -4,9 +4,9 @@
 
 package org.mozilla.gecko;
 
+import java.lang.reflect.Method;
 import java.util.Locale;
 
-import org.mozilla.gecko.BrowserLocaleManager;
 import org.mozilla.gecko.LocaleManager;
 
 import android.app.Activity;
@@ -25,8 +25,19 @@ import android.support.v4.app.FragmentActivity;
  * <code>LocaleAwareFragmentActivity</code> or <code>LocaleAwareActivity</code>.
  */
 public class Locales {
+    public static LocaleManager getLocaleManager() {
+        try {
+            final Class<?> clazz = Class.forName("org.mozilla.gecko.BrowserLocaleManager");
+            final Method getInstance = clazz.getMethod("getInstance");
+            final LocaleManager localeManager = (LocaleManager) getInstance.invoke(null);
+            return localeManager;
+        } catch (Exception e) {
+          throw new RuntimeException(e);
+        }
+    }
+
     public static void initializeLocale(Context context) {
-        final LocaleManager localeManager = BrowserLocaleManager.getInstance();
+        final LocaleManager localeManager = getLocaleManager();
         final StrictMode.ThreadPolicy savedPolicy = StrictMode.allowThreadDiskReads();
         StrictMode.allowThreadDiskWrites();
         try {
diff --git a/mobile/android/base/background/healthreport/upload/AndroidSubmissionClient.java b/mobile/android/base/background/healthreport/upload/AndroidSubmissionClient.java
index b7ebfc28e1cf..b6b5481b8f05 100644
--- a/mobile/android/base/background/healthreport/upload/AndroidSubmissionClient.java
+++ b/mobile/android/base/background/healthreport/upload/AndroidSubmissionClient.java
@@ -4,15 +4,13 @@
 
 package org.mozilla.gecko.background.healthreport.upload;
 
-import java.io.IOException;
-import java.io.UnsupportedEncodingException;
-import java.net.URISyntaxException;
-import java.util.ArrayList;
-import java.util.Collection;
-
+import android.content.ContentProviderClient;
+import android.content.Context;
+import android.content.SharedPreferences;
+import ch.boye.httpclientandroidlib.HttpResponse;
 import org.json.JSONException;
 import org.json.JSONObject;
-import org.mozilla.gecko.BrowserLocaleManager;
+import org.mozilla.gecko.Locales;
 import org.mozilla.gecko.background.bagheera.BagheeraClient;
 import org.mozilla.gecko.background.bagheera.BagheeraRequestDelegate;
 import org.mozilla.gecko.background.common.GlobalConstants;
@@ -30,10 +28,11 @@ import org.mozilla.gecko.background.healthreport.HealthReportStorage.Measurement
 import org.mozilla.gecko.background.healthreport.ProfileInformationCache;
 import org.mozilla.gecko.sync.net.BaseResource;
 
-import android.content.ContentProviderClient;
-import android.content.Context;
-import android.content.SharedPreferences;
-import ch.boye.httpclientandroidlib.HttpResponse;
+import java.io.IOException;
+import java.io.UnsupportedEncodingException;
+import java.net.URISyntaxException;
+import java.util.ArrayList;
+import java.util.Collection;
 
 public class AndroidSubmissionClient implements SubmissionClient {
   protected static final String LOG_TAG = AndroidSubmissionClient.class.getSimpleName();
@@ -410,7 +409,7 @@ public class AndroidSubmissionClient implements SubmissionClient {
           String generationProfilePath, ConfigurationProvider providedConfig) throws JSONException {
 
         // Let's make sure we have an accurate locale.
-        BrowserLocaleManager.getInstance().getAndApplyPersistedLocale(context);
+        Locales.getLocaleManager().getAndApplyPersistedLocale(context);
 
         final JSONObject document;
         // If the given profilePath matches the one we cached for the tracker, use the cached env.
diff --git a/mobile/android/base/fxa/sync/FxAccountNotificationManager.java b/mobile/android/base/fxa/sync/FxAccountNotificationManager.java
index e551c2e35508..b44da76fc5bd 100644
--- a/mobile/android/base/fxa/sync/FxAccountNotificationManager.java
+++ b/mobile/android/base/fxa/sync/FxAccountNotificationManager.java
@@ -10,7 +10,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.support.v4.app.NotificationCompat;
 import android.support.v4.app.NotificationCompat.Builder;
-import org.mozilla.gecko.BrowserLocaleManager;
+import org.mozilla.gecko.Locales;
 import org.mozilla.gecko.R;
 import org.mozilla.gecko.background.common.log.Logger;
 import org.mozilla.gecko.background.common.telemetry.TelemetryWrapper;
@@ -77,7 +77,7 @@ public class FxAccountNotificationManager {
 
     if (!localeUpdated) {
       localeUpdated = true;
-      BrowserLocaleManager.getInstance().getAndApplyPersistedLocale(context);
+      Locales.getLocaleManager().getAndApplyPersistedLocale(context);
     }
 
     final String title;
diff --git a/mobile/android/base/moz.build b/mobile/android/base/moz.build
index 387c4060712d..6123185a872c 100644
--- a/mobile/android/base/moz.build
+++ b/mobile/android/base/moz.build
@@ -19,12 +19,20 @@ constants_jar.sources = [
     'annotation/RobocopTarget.java',
     'annotation/WebRTCJNITarget.java',
     'annotation/WrapForJNI.java',
+    'db/BrowserContract.java',
+    'LocaleManager.java',
+    'Locales.java',
     'SysInfo.java',
 ]
 constants_jar.generated_sources = [
     'preprocessed/org/mozilla/gecko/AdjustConstants.java',
     'preprocessed/org/mozilla/gecko/AppConstants.java',
 ]
+constants_jar.extra_jars = [
+    CONFIG['ANDROID_SUPPORT_ANNOTATIONS_JAR_LIB'],
+    CONFIG['ANDROID_SUPPORT_V4_AAR_LIB'],
+    CONFIG['ANDROID_SUPPORT_V4_AAR_INTERNAL_LIB'],
+]
 
 if CONFIG['MOZ_INSTALL_TRACKING']:
     constants_jar.sources += [
@@ -188,7 +196,6 @@ gbjar.sources += [
     'db/AbstractPerProfileDatabaseProvider.java',
     'db/AbstractTransactionalProvider.java',
     'db/BaseTable.java',
-    'db/BrowserContract.java',
     'db/BrowserDatabaseHelper.java',
     'db/BrowserDB.java',
     'db/BrowserProvider.java',
@@ -389,8 +396,6 @@ gbjar.sources += [
     'IntentHelper.java',
     'javaaddons/JavaAddonManager.java',
     'javaaddons/JavaAddonManagerV1.java',
-    'LocaleManager.java',
-    'Locales.java',
     'lwt/LightweightTheme.java',
     'lwt/LightweightThemeDrawable.java',
     'mdns/MulticastDNSManager.java',