gecko/mobile/android/base/resources/layout/gecko_app.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:id="@+id/main_layout"
              style="@style/Screen">

    <include layout="@layout/browser_toolbar"/>

    <RelativeLayout android:id="@+id/gecko_layout"
                    android:layout_width="fill_parent"
                    android:layout_height="fill_parent"
                    android:layout_weight="1">

        <AbsoluteLayout android:id="@+id/plugin_container"
                        android:background="@android:color/transparent"
                        android:layout_width="fill_parent"
                        android:layout_height="fill_parent"/>

        <org.mozilla.gecko.AutoCompletePopup android:id="@+id/autocomplete_popup"
                                             style="@android:style/Widget.ListView.White"
                                             android:layout_width="fill_parent"
                                             android:layout_height="100dip"
                                             android:background="@drawable/autocomplete_list_bg"
                                             android:cacheColorHint="#ffffff"
                                             android:listSelector="@android:drawable/list_selector_background"
                                             android:visibility="gone"/>

   </RelativeLayout>

 </LinearLayout>