gecko/mobile/android/base/resources/values-v11/themes.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <style name="Gecko" parent="@android:style/Theme.Holo">
        <item name="android:windowBackground">@color/splash_background</item>
    </style>
    
    <style name="Gecko.TitleBar" parent="Gecko"/>

    <style name="Gecko.NoActionBar" parent="@android:style/Theme.Holo">
        <item name="android:windowActionBar">false</item>
        <item name="android:windowNoTitle">true</item>
        <item name="android:windowBackground">@color/splash_background</item>
    </style>
    
    <style name="Gecko.Light" parent="@android:style/Theme.Holo.Light">
        <item name="android:windowBackground">@color/splash_background</item>
    </style>
    
    <style name="Gecko.Light.TitleBar" parent="Gecko.Light"/>

    <style name="Gecko.Light.NoActionBar" parent="@android:style/Theme.Holo.Light">
        <item name="android:windowActionBar">false</item>
        <item name="android:windowNoTitle">true</item>
        <item name="android:windowBackground">@color/splash_background</item>
    </style>
    
    <style name="Gecko.Translucent" parent="@android:style/Theme.Translucent">
        <item name="android:windowActionBar">true</item>
        <item name="android:windowNoTitle">false</item>
    </style>
    
</resources>