--- a/mobile/android/base/java/org/mozilla/gecko/customtabs/CustomTabsActivity.java
+++ b/mobile/android/base/java/org/mozilla/gecko/customtabs/CustomTabsActivity.java
@@ -400,16 +400,17 @@ public class CustomTabsActivity extends 
     private void onOpenInClicked() {
         final Tab tab = Tabs.getInstance().getSelectedTab();
         if (tab != null) {
             // To launch default browser with url of current tab.
             final Intent intent = new Intent();
             intent.setData(Uri.parse(tab.getURL()));
             intent.setAction(Intent.ACTION_VIEW);
             startActivity(intent);
+            finish();
         }
     }
 
     private void onActionButtonClicked() {
         PendingIntent pendingIntent = IntentUtil.getActionButtonPendingIntent(startIntent);
         performPendingIntent(pendingIntent);
     }