diff --git a/res/layout-land/nav_screen.xml b/res/layout-land/nav_screen.xml
index d2424ea..8e10f02 100644
--- a/res/layout-land/nav_screen.xml
+++ b/res/layout-land/nav_screen.xml
@@ -36,6 +36,7 @@
             android:paddingRight="16dip"
             style="@style/HoloButton"
             android:gravity="center_vertical"
+            android:contentDescription="@string/accessibility_button_newtab"
             android:src="@drawable/ic_new_window_holo_dark" />
         <ImageButton
             android:id="@+id/newincognito"
@@ -45,6 +46,7 @@
             android:paddingRight="16dip"
             style="@style/HoloButton"
             android:gravity="center_vertical"
+            android:contentDescription="@string/accessibility_button_newincognitotab"
             android:src="@drawable/ic_new_incognito_holo_dark" />
         <ImageButton
             android:id="@+id/bookmarks"
@@ -52,6 +54,7 @@
             android:layout_height="match_parent"
             android:paddingLeft="16dip"
             android:paddingRight="16dip"
+            android:contentDescription="@string/accessibility_button_bookmarks"
             android:src="@drawable/ic_bookmarks_history_holo_dark"
             style="@style/HoloButton" />
         <ImageButton
@@ -62,6 +65,7 @@
             android:paddingRight="16dip"
             style="@style/HoloButton"
             android:gravity="center_vertical"
+            android:contentDescription="@string/accessibility_button_more"
             android:src="@*android:drawable/ic_menu_moreoverflow_normal_holo_dark" />
     </LinearLayout>
     <com.android.browser.NavTabGallery
diff --git a/res/layout-sw600dp/title_bar_nav.xml b/res/layout-sw600dp/title_bar_nav.xml
index 818707e..37bea35 100644
--- a/res/layout-sw600dp/title_bar_nav.xml
+++ b/res/layout-sw600dp/title_bar_nav.xml
@@ -29,12 +29,14 @@
             android:layout_width="wrap_content"
             android:layout_height="match_parent"
             android:paddingLeft="16dip"
+            android:contentDescription="@string/accessibility_button_back"
             style="@style/HoloButton" />
         <ImageButton
             android:id="@+id/forward"
             android:src="@drawable/ic_forward_holo_dark"
             android:layout_width="wrap_content"
             android:layout_height="match_parent"
+            android:contentDescription="@string/accessibility_button_forward"
             style="@style/HoloButton" />
         <ImageButton
             android:id="@+id/stop"
@@ -42,6 +44,7 @@
             android:layout_height="match_parent"
             style="@style/HoloButton"
             android:gravity="center_vertical"
+            android:contentDescription="@string/accessibility_button_stop"
             android:src="@drawable/ic_stop_holo_dark" />
     </LinearLayout>
     <LinearLayout
@@ -58,6 +61,7 @@
             android:layout_width="wrap_content"
             android:layout_height="match_parent"
             android:src="@drawable/ic_web_holo_dark"
+            android:contentDescription="@string/accessibility_button_uaswitch"
             style="@style/HoloIcon" />
         <ImageView
             android:id="@+id/lock"
@@ -88,12 +92,14 @@
             android:src="@drawable/btn_imageview_star"
             android:layout_width="wrap_content"
             android:layout_height="match_parent"
+            android:contentDescription="@string/accessibility_button_addbookmark"
             style="@style/HoloButton" />
         <ImageButton
             android:id="@+id/clear"
             android:src="@drawable/ic_stop_holo_dark"
             android:layout_width="wrap_content"
             android:layout_height="match_parent"
+            android:contentDescription="@string/accessibility_button_clear"
             style="@style/HoloButton" />
     </LinearLayout>
     <ImageButton
@@ -103,12 +109,14 @@
         android:layout_height="match_parent"
         android:visibility="gone"
         android:gravity="center_vertical"
+            android:contentDescription="@string/accessibility_button_go"
         style="@style/HoloButton" />
     <ImageButton
         android:id="@+id/voicesearch"
         android:src="@drawable/ic_voice_search_holo_dark"
         android:layout_width="wrap_content"
         android:layout_height="match_parent"
+            android:contentDescription="@string/accessibility_button_voice"
         style="@style/HoloButton" />
     <ImageButton
         android:id="@+id/search"
@@ -116,6 +124,7 @@
         android:layout_width="wrap_content"
         android:layout_height="match_parent"
         android:gravity="center_vertical"
+            android:contentDescription="@string/accessibility_button_search"
         style="@style/HoloButton" />
     <ImageButton
         android:id="@+id/all_btn"
@@ -124,5 +133,6 @@
         android:scaleType="center"
         android:paddingRight="16dip"
         style="@style/HoloButton"
+        android:contentDescription="@string/accessibility_button_bookmarks"
         android:src="@drawable/ic_bookmarks_history_holo_dark" />
 </com.android.browser.NavigationBarTablet>
diff --git a/res/layout/nav_screen.xml b/res/layout/nav_screen.xml
index b4e1f15..8ff4be3 100644
--- a/res/layout/nav_screen.xml
+++ b/res/layout/nav_screen.xml
@@ -41,6 +41,7 @@
             android:paddingRight="16dip"
             style="@style/HoloButton"
             android:gravity="center_vertical"
+            android:contentDescription="@string/accessibility_button_newtab"
             android:src="@drawable/ic_new_window_holo_dark" />
         <ImageButton
             android:id="@+id/newincognito"
@@ -50,6 +51,7 @@
             android:paddingRight="16dip"
             style="@style/HoloButton"
             android:gravity="center_vertical"
+            android:contentDescription="@string/accessibility_button_newincognitotab"
             android:src="@drawable/ic_new_incognito_holo_dark" />
         <ImageButton
             android:id="@+id/bookmarks"
@@ -57,6 +59,7 @@
             android:layout_height="match_parent"
             android:paddingLeft="16dip"
             android:paddingRight="16dip"
+            android:contentDescription="@string/accessibility_button_bookmarks"
             android:src="@drawable/ic_bookmarks_history_holo_dark"
             style="@style/HoloButton" />
         <ImageButton
@@ -67,6 +70,7 @@
             android:paddingRight="16dip"
             style="@style/HoloButton"
             android:gravity="center_vertical"
+            android:contentDescription="@string/accessibility_button_more"
             android:src="@*android:drawable/ic_menu_moreoverflow_normal_holo_dark" />
     </LinearLayout>
 </RelativeLayout>
diff --git a/res/layout/nav_tab_view.xml b/res/layout/nav_tab_view.xml
index dbf9494..6330357 100644
--- a/res/layout/nav_tab_view.xml
+++ b/res/layout/nav_tab_view.xml
@@ -46,6 +46,7 @@
             android:layout_gravity="center_vertical"
             android:layout_width="wrap_content"
             android:layout_height="match_parent"
+            android:contentDescription="@string/accessibility_button_closetab"
             style="@style/HoloButton" />
     </LinearLayout>
     <ImageView
diff --git a/res/layout/tab_title.xml b/res/layout/tab_title.xml
index 589debc..8a5e308 100644
--- a/res/layout/tab_title.xml
+++ b/res/layout/tab_title.xml
@@ -22,6 +22,7 @@
         android:layout_height="match_parent"
         android:gravity="center_vertical"
         android:src="@drawable/ic_incognito_holo_dark"
+        android:contentDescription="@string/accessibility_state_incognito"
         android:visibility="gone" />
     <ImageView
         android:id="@+id/snapshot"
@@ -29,6 +30,7 @@
         android:layout_height="match_parent"
         android:gravity="center_vertical"
         android:src="@drawable/ic_search_category_history"
+            android:contentDescription="@string/accessibility_state_frozen"
         android:visibility="gone" />
     <ImageView
         android:id="@+id/favicon"
@@ -59,5 +61,6 @@
         android:background="?android:attr/selectableItemBackground"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
+        android:contentDescription="@string/accessibility_button_closetab"
         android:src="@drawable/ic_tab_close" />
 </merge>
diff --git a/res/layout/tab_view.xml b/res/layout/tab_view.xml
deleted file mode 100644
index 8ffb73d..0000000
--- a/res/layout/tab_view.xml
+++ /dev/null
@@ -1,85 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (C) 2009 The Android Open Source Project
-
-     Licensed under the Apache License, Version 2.0 (the "License");
-     you may not use this file except in compliance with the License.
-     You may obtain a copy of the License at
-
-          http://www.apache.org/licenses/LICENSE-2.0
-
-     Unless required by applicable law or agreed to in writing, software
-     distributed under the License is distributed on an "AS IS" BASIS,
-     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-     See the License for the specific language governing permissions and
-     limitations under the License.
--->
-
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_height="wrap_content"
-    android:minHeight="?android:attr/listPreferredItemHeight"
-    android:layout_width="match_parent"
-    android:orientation="horizontal"
-    android:gravity="center_vertical"
-    android:paddingLeft="8dip"
-    android:paddingTop="4dip"
-    android:paddingBottom="4dip"
-    >
-    <RelativeLayout
-        android:id="@+id/list_item"
-        android:layout_width="0dip"
-        android:layout_weight="1"
-        android:layout_height="wrap_content"
-        android:background="@drawable/bookmark_list_favicon_bg">
-        <ImageView
-            android:id="@+id/thumb"
-            android:src="@drawable/thumbnail_bookmarks_widget_no_bookmark_holo"
-            android:layout_width="match_parent"
-            android:layout_height="@dimen/tab_view_thumbnail_height"
-            android:scaleType="fitXY"
-            android:cropToPadding="true" />
-        <LinearLayout
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_alignBottom="@id/thumb"
-            android:background="@color/tabViewTitleBackground">
-            <ImageView
-                android:id="@+id/favicon"
-                android:src="@drawable/app_web_browser_sm"
-                android:layout_width="@dimen/favicon_size"
-                android:layout_height="@dimen/favicon_size"
-                android:layout_gravity="center_vertical"
-                android:layout_marginLeft="4dip"
-                android:layout_marginRight="8dip"
-                android:layout_marginTop="4dip"
-                android:layout_marginBottom="4dip"
-                android:scaleType="fitXY" />
-            <TextView
-                android:id="@+id/label"
-                android:layout_width="match_parent"
-                android:layout_height="wrap_content"
-                android:layout_gravity="center_vertical"
-                android:singleLine="true"
-                android:ellipsize="end"
-                android:textSize="12sp"
-                android:typeface="sans"
-                android:textColor="@android:color/white" />
-        </LinearLayout>
-    </RelativeLayout>
-    <View android:id="@+id/divider"
-        android:background="?android:attr/dividerVertical"
-        android:layout_width="1dp"
-        android:layout_height="match_parent"
-        android:layout_marginLeft="8dip"
-        android:layout_marginTop="5dip"
-        android:layout_marginBottom="5dip"
-        />
-    <view class="com.android.browser.ActiveTabsPage$CloseHolder" android:id="@+id/close"
-        android:layout_width="wrap_content"
-        android:layout_height="match_parent"
-        android:paddingLeft="12dip"
-        android:paddingRight="12dip"
-        android:background="@drawable/bookmark_thumb_selector"
-        android:src="@drawable/ic_close_window_holo_dark"
-        android:scaleType="center"
-        />
-</LinearLayout>
diff --git a/res/layout/title_bar_nav.xml b/res/layout/title_bar_nav.xml
index 5a3c10e..5e4a3a1 100644
--- a/res/layout/title_bar_nav.xml
+++ b/res/layout/title_bar_nav.xml
@@ -49,6 +49,7 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="center_vertical"
+            android:contentDescription="@string/accessibility_button_stop"
             android:src="@drawable/ic_stop_holo_dark"
             style="@style/HoloButton" />
         <com.android.browser.UrlInputView
@@ -73,6 +74,7 @@
             android:id="@+id/voice"
             android:layout_width="wrap_content"
             android:layout_height="match_parent"
+            android:contentDescription="@string/accessibility_button_voice"
             android:src="@drawable/ic_voice_search_holo_dark"
             style="@style/HoloButton"
             android:visibility="gone" />
@@ -81,6 +83,7 @@
         android:id="@+id/tab_switcher"
         android:layout_width="wrap_content"
         android:layout_height="match_parent"
+            android:contentDescription="@string/accessibility_button_navscreen"
         android:src="@drawable/ic_windows_holo_dark"
         style="@style/HoloButton" />
     <ImageButton
@@ -89,5 +92,6 @@
         android:layout_height="match_parent"
         style="@style/HoloButton"
         android:gravity="center_vertical"
+        android:contentDescription="@string/accessibility_button_more"
         android:src="@*android:drawable/ic_menu_moreoverflow_normal_holo_dark" />
 </com.android.browser.NavigationBarPhone>
diff --git a/res/values/strings.xml b/res/values/strings.xml
index b5de632..4ed6c21 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -1012,4 +1012,49 @@
     <string name="remove_snapshot">Delete saved page</string>
     <!-- Popup menu option to load the live version of a saved page [CHAR LIMIT=20] -->
     <string name="snapshot_go_live">Go live</string>
+
+    <!--  Accessibility content descriptions -->
+
+    <!-- Content description for back button [CHAR LIMIT=NONE] -->
+    <string name="accessibility_button_back">Go back</string>
+    <!-- Content description for forward button [CHAR LIMIT=NONE] -->
+    <string name="accessibility_button_forward">Go forward</string>
+    <!-- Content description for refresh button [CHAR LIMIT=NONE] -->
+    <string name="accessibility_button_refresh">Refresh page</string>
+    <!-- Content description for stop button [CHAR LIMIT=NONE] -->
+    <string name="accessibility_button_stop">Stop page load</string>
+    <!-- Content description for add bookmark button [CHAR LIMIT=NONE] -->
+    <string name="accessibility_button_addbookmark">Bookmark page</string>
+    <!-- Content description for search button [CHAR LIMIT=NONE] -->
+    <string name="accessibility_button_search">Search</string>
+    <!-- Content description for voice search button [CHAR LIMIT=NONE] -->
+    <string name="accessibility_button_voice">Start voice search</string>
+    <!-- Content description for bookmarks button [CHAR LIMIT=NONE] -->
+    <string name="accessibility_button_bookmarks">Bookmarks</string>
+    <!-- Content description for close tab button [CHAR LIMIT=NONE] -->
+    <string name="accessibility_button_closetab">Close tab</string>
+    <!-- Content description for new tab button [CHAR LIMIT=NONE] -->
+    <string name="accessibility_button_newtab">Open new tab</string>
+    <!-- Content description for new incognito tab button [CHAR LIMIT=NONE] -->
+    <string name="accessibility_button_newincognitotab">Open new incognito tab</string>
+    <!-- Content description for clear button [CHAR LIMIT=NONE] -->
+    <string name="accessibility_button_clear">Clear input</string>
+    <!-- Content description for user agent switcher [CHAR LIMIT=NONE] -->
+    <string name="accessibility_button_uaswitch">Switch user agent</string>
+    <!-- Content description for go button [CHAR LIMIT=NONE] -->
+    <string name="accessibility_button_go">Go</string>
+
+    <!-- Content description for tab switcher button [CHAR LIMIT=NONE] -->
+    <string name="accessibility_button_navscreen">Page manager</string>
+    <!-- Content description for overflow menu button [CHAR LIMIT=NONE] -->
+    <string name="accessibility_button_more">More options</string>
+
+    <!-- Content description for incognito state [CHAR LIMIT=NONE] -->
+    <string name="accessibility_state_incognito">Incognito page</string>
+    <!-- Content description for frozen state [CHAR LIMIT=NONE] -->
+    <string name="accessibility_state_frozen">Saved page</string>
+
+    <!-- Content description for tab switcher transition [CHAR LIMIT=NONE] -->
+    <string name="accessibility_transition_navscreen">Tab management</string>
+
 </resources>
diff --git a/src/com/android/browser/NavScreen.java b/src/com/android/browser/NavScreen.java
index a361136..9c12ccf 100644
--- a/src/com/android/browser/NavScreen.java
+++ b/src/com/android/browser/NavScreen.java
@@ -111,6 +111,8 @@
 
     private void init() {
         LayoutInflater.from(mContext).inflate(R.layout.nav_screen, this);
+        setContentDescription(mContext.getResources().getString(
+                R.string.accessibility_transition_navscreen));
         mBookmarks = (ImageButton) findViewById(R.id.bookmarks);
         mNewTab = (ImageButton) findViewById(R.id.newtab);
         mNewIncognito = (ImageButton) findViewById(R.id.newincognito);
diff --git a/src/com/android/browser/NavigationBarPhone.java b/src/com/android/browser/NavigationBarPhone.java
index 388c262..8173377 100644
--- a/src/com/android/browser/NavigationBarPhone.java
+++ b/src/com/android/browser/NavigationBarPhone.java
@@ -40,6 +40,8 @@
     private ImageView mVoiceButton;
     private Drawable mStopDrawable;
     private Drawable mRefreshDrawable;
+    private String mStopDescription;
+    private String mRefreshDescription;
     private View mTabSwitcher;
     private View mComboIcon;
     private View mTitleContainer;
@@ -78,6 +80,8 @@
         Resources res = getContext().getResources();
         mStopDrawable = res.getDrawable(R.drawable.ic_stop_holo_dark);
         mRefreshDrawable = res.getDrawable(R.drawable.ic_refresh_holo_dark);
+        mStopDescription = res.getString(R.string.accessibility_button_stop);
+        mRefreshDescription = res.getString(R.string.accessibility_button_refresh);
         mTextfieldBgDrawable = res.getDrawable(R.drawable.textfield_active_holo_dark);
         setUaSwitcher(mComboIcon);
         mUrlInput.setContainer(this);
@@ -98,6 +102,7 @@
         super.onProgressStarted();
         if (mStopButton.getDrawable() != mStopDrawable) {
             mStopButton.setImageDrawable(mStopDrawable);
+            mStopButton.setContentDescription(mStopDescription);
             if (mStopButton.getVisibility() != View.VISIBLE) {
                 mComboIcon.setVisibility(View.GONE);
                 mStopButton.setVisibility(View.VISIBLE);
@@ -109,6 +114,7 @@
     public void onProgressStopped() {
         super.onProgressStopped();
         mStopButton.setImageDrawable(mRefreshDrawable);
+        mStopButton.setContentDescription(mRefreshDescription);
         if (!isEditingUrl()) {
             mComboIcon.setVisibility(View.VISIBLE);
         }
diff --git a/src/com/android/browser/NavigationBarTablet.java b/src/com/android/browser/NavigationBarTablet.java
index 9cb8ff2..e3059ea 100644
--- a/src/com/android/browser/NavigationBarTablet.java
+++ b/src/com/android/browser/NavigationBarTablet.java
@@ -35,6 +35,8 @@
 
     private Drawable mStopDrawable;
     private Drawable mReloadDrawable;
+    private String mStopDescription;
+    private String mRefreshDescription;
 
     private View mUrlContainer;
     private ImageButton mBackButton;
@@ -71,6 +73,8 @@
         Resources resources = context.getResources();
         mStopDrawable = resources.getDrawable(R.drawable.ic_stop_holo_dark);
         mReloadDrawable = resources.getDrawable(R.drawable.ic_refresh_holo_dark);
+        mStopDescription = resources.getString(R.string.accessibility_button_stop);
+        mRefreshDescription = resources.getString(R.string.accessibility_button_refresh);
         mFocusDrawable = resources.getDrawable(
                 R.drawable.textfield_active_holo_dark);
         mUnfocusDrawable = resources.getDrawable(
@@ -235,11 +239,13 @@
     @Override
     public void onProgressStarted() {
         mStopButton.setImageDrawable(mStopDrawable);
+        mStopButton.setContentDescription(mStopDescription);
     }
 
     @Override
     public void onProgressStopped() {
         mStopButton.setImageDrawable(mReloadDrawable);
+        mStopButton.setContentDescription(mRefreshDescription);
     }
 
     protected void updateSearchMode(boolean userEdited) {
diff --git a/src/com/android/browser/PhoneUi.java b/src/com/android/browser/PhoneUi.java
index 1c9d5a0..853d935 100644
--- a/src/com/android/browser/PhoneUi.java
+++ b/src/com/android/browser/PhoneUi.java
@@ -17,6 +17,7 @@
 package com.android.browser;
 
 import android.app.Activity;
+import android.content.Context;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.ActionMode;
@@ -25,6 +26,8 @@
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
+import android.view.accessibility.AccessibilityEvent;
+import android.view.accessibility.AccessibilityManager;
 import android.webkit.WebView;
 import android.widget.FrameLayout;
 
@@ -250,6 +253,8 @@
         mContentView.setVisibility(View.GONE);
         mCustomViewContainer.setVisibility(View.VISIBLE);
         mCustomViewContainer.bringToFront();
+        // notify accessibility manager about the screen change
+        mNavScreen.sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);
     }
 
     void hideNavScreen(boolean animate) {