iceraven-browser/app/src/main/res/drawable/session_background.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- This Source Code Form is subject to the terms of the Mozilla Public
   - License, v. 2.0. If a copy of the MPL was not distributed with this
   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->

<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" >
    <solid android:color="@color/photonGrey40" />
    <corners
        android:bottomLeftRadius="7dp"
        android:bottomRightRadius="7dp" />
</shape>