--- a/mobile/android/app/lint.xml
+++ b/mobile/android/app/lint.xml
@@ -52,17 +52,16 @@
         <ignore path="**/mobile/android/base/java/org/mozilla/gecko/PrintHelper.java"/>
         <ignore path="**/mobile/android/base/java/org/mozilla/gecko/animation/PropertyAnimator.java"/>
         <ignore path="**/mobile/android/base/java/org/mozilla/gecko/RemotePresentationService.java"/>
         <ignore path="**/mobile/android/base/java/org/mozilla/gecko/db/SharedBrowserDatabaseProvider.java"/>
         <ignore path="**/mobile/android/base/java/org/mozilla/gecko/toolbar/TabCounter.java"/>
         <ignore path="**/mobile/android/base/java/org/mozilla/gecko/tabs/TabPanelBackButton.java"/>
         <ignore path="**/mobile/android/base/java/org/mozilla/gecko/toolbar/ToolbarEditText.java"/>
         <ignore path="**/mobile/android/base/java/org/mozilla/gecko/util/ViewUtil.java"/>
-        <ignore path="**/mobile/android/base/java/org/mozilla/gecko/webapps/WebAppActivity.java"/>
         <ignore path="**/mobile/android/base/java/org/mozilla/gecko/IntentHelper.java"/>
         <ignore path="**/media/webrtc/trunk/webrtc/modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioEffects.java"/>
         <ignore path="**/media/webrtc/trunk/webrtc/modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioRecord.java"/>
         <ignore path="src/main/res/values/styles.xml"/>
     </issue>
 
     <!-- We fixed all "Registered" lint errors. However the current gradle plugin has a bug where
          it ignores @SuppressLint annotations for this check. See CrashReporter class and

--- a/mobile/android/base/java/org/mozilla/gecko/webapps/WebAppActivity.java
+++ b/mobile/android/base/java/org/mozilla/gecko/webapps/WebAppActivity.java
@@ -4,20 +4,22 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 package org.mozilla.gecko.webapps;
 
 import java.io.File;
 import java.io.IOException;
 import java.util.List;
 
+import android.annotation.TargetApi;
 import android.app.ActivityManager;
 import android.content.Intent;
 import android.graphics.Bitmap;
 import android.net.Uri;
+import android.os.Build;
 import android.os.Bundle;
 import android.support.v7.app.ActionBar;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.view.ActionMode;
 import android.support.v7.widget.Toolbar;
 import android.text.TextUtils;
 import android.util.Log;
 import android.view.View;
@@ -113,46 +115,51 @@ public class WebAppActivity extends AppC
     @Override
     protected void onSaveInstanceState(Bundle outState) {
         super.onSaveInstanceState(outState);
 
         outState.putParcelable(SAVED_INTENT, getIntent());
     }
 
     private void loadManifest(String manifestPath) {
+        if (AppConstants.Versions.feature21Plus) {
+            loadManifestV21(manifestPath);
+        }
+    }
+
+    // The customisations defined in the manifest only work on Android API 21+
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    private void loadManifestV21(String manifestPath) {
         if (TextUtils.isEmpty(manifestPath)) {
             Log.e(LOGTAG, "Missing manifest");
             return;
         }
-        // The customisations defined in the manifest only work on Android API 21+
-        if (AppConstants.Versions.preLollipop) {
-            return;
-        }
 
         try {
             final File manifestFile = new File(manifestPath);
             final JSONObject manifest = FileUtils.readJSONObjectFromFile(manifestFile);
             final JSONObject manifestField = manifest.getJSONObject("manifest");
             final Integer color = readColorFromManifest(manifestField);
             final String name = readNameFromManifest(manifestField);
             final Bitmap icon = readIconFromManifest(manifest);
             mScope = readScopeFromManifest(manifest, manifestPath);
             final ActivityManager.TaskDescription taskDescription = (color == null)
                     ? new ActivityManager.TaskDescription(name, icon)
                     : new ActivityManager.TaskDescription(name, icon, color);
 
-            updateStatusBarColor(color);
+            updateStatusBarColorV21(color);
             setTaskDescription(taskDescription);
 
         } catch (IOException | JSONException e) {
             Log.e(LOGTAG, "Failed to read manifest", e);
         }
     }
 
-    private void updateStatusBarColor(final Integer themeColor) {
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    private void updateStatusBarColorV21(final Integer themeColor) {
         if (themeColor != null) {
             final Window window = getWindow();
             window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
             window.setStatusBarColor(ColorUtil.darken(themeColor, 0.25));
         }
     }
 
     private Integer readColorFromManifest(JSONObject manifest) {