fenix/app/src/main/res/layout/fragment_browser.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/. -->
<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:mozac="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/browserLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="browser.BrowserFragment">

    <mozilla.components.concept.engine.EngineView
        android:id="@+id/engineView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <androidx.core.widget.NestedScrollView
        android:id="@+id/nestedScrollQuickAction"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="?foundation"
        android:clipToPadding="true"
        app:behavior_hideable="true"
        app:behavior_peekHeight="12dp"
        app:layout_behavior="org.mozilla.fenix.quickactionsheet.QuickActionSheetBehavior" />

    <mozilla.components.feature.findinpage.view.FindInPageBar
        android:id="@+id/findInPageView"
        android:layout_width="match_parent"
        android:layout_height="56dp"
        android:layout_gravity="bottom"
        android:background="?foundation"
        android:clickable="true"
        android:visibility="gone"
        app:findInPageNoMatchesTextColor="?attr/destructive"
        app:layout_behavior="org.mozilla.fenix.components.FindInPageBarBehavior"
        mozac:findInPageButtonsTint="?primaryText"
        mozac:findInPageResultCountTextColor="?primaryText" />

    <mozilla.components.feature.readerview.view.ReaderViewControlsBar
        android:id="@+id/readerViewControlsBar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        android:background="?foundation"
        android:elevation="24dp"
        android:visibility="gone" />

</androidx.coordinatorlayout.widget.CoordinatorLayout>