Adding upstream version 115.7.0esr.upstream/115.7.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

13 files changed, 2068 insertions, 0 deletions

diff --git a/toolkit/components/browser/build/components.conf b/toolkit/components/browser/build/components.conf
new file mode 100644
index 0000000000..a0bdb1303c
--- /dev/null
+++ b/toolkit/components/browser/build/components.conf
@@ -0,0 +1,15 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+Classes = [
+    {
+        'cid': '{f66bc334-1dd1-11b2-bab2-90e04fe15c19}',
+        'contract_ids': ['@mozilla.org/embedding/browser/content-policy;1'],
+        'type': 'nsWebBrowserContentPolicy',
+        'headers': ['/toolkit/components/browser/nsWebBrowserContentPolicy.h'],
+        'categories': {'content-policy': '@mozilla.org/embedding/browser/content-policy;1'},
+    },
+]
diff --git a/toolkit/components/browser/build/moz.build b/toolkit/components/browser/build/moz.build
new file mode 100644
index 0000000000..64df8d564c
--- /dev/null
+++ b/toolkit/components/browser/build/moz.build
@@ -0,0 +1,11 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+XPCOM_MANIFESTS += [
+    "components.conf",
+]
+
+FINAL_LIBRARY = "xul"
diff --git a/toolkit/components/browser/moz.build b/toolkit/components/browser/moz.build
new file mode 100644
index 0000000000..903390a3c8
--- /dev/null
+++ b/toolkit/components/browser/moz.build
@@ -0,0 +1,41 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+with Files("**"):
+    BUG_COMPONENT = ("Toolkit", "General")
+
+DIRS += ["build"]
+
+XPIDL_SOURCES += [
+    "nsIWebBrowser.idl",
+    "nsIWebBrowserChrome.idl",
+    "nsIWebBrowserChromeFocus.idl",
+]
+
+XPIDL_SOURCES += [
+    "nsIWebBrowserPrint.idl",
+]
+
+XPIDL_MODULE = "webBrowser_core"
+
+UNIFIED_SOURCES += [
+    "nsWebBrowser.cpp",
+    "nsWebBrowserContentPolicy.cpp",
+]
+
+include("/ipc/chromium/chromium-config.mozbuild")
+
+FINAL_LIBRARY = "xul"
+LOCAL_INCLUDES += [
+    "/docshell/base",
+    "/dom/base",
+    "/layout/style",
+]
+
+EXPORTS += [
+    "nsEmbedCID.h",
+    "nsWebBrowser.h",
+]
diff --git a/toolkit/components/browser/nsEmbedCID.h b/toolkit/components/browser/nsEmbedCID.h
new file mode 100644
index 0000000000..126bb43b0a
--- /dev/null
+++ b/toolkit/components/browser/nsEmbedCID.h
@@ -0,0 +1,44 @@
+/* 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/. */
+
+#ifndef NSEMBEDCID_H
+#define NSEMBEDCID_H
+
+/**
+ * @file
+ * @brief List of, and documentation for, frozen Gecko embedding contracts.
+ */
+
+/**
+ * Web Browser ContractID
+ *   Creating an instance of this ContractID (via createInstanceByContractID)
+ *   is the basic way to instantiate a Gecko browser.
+ *
+ * This contract implements the following interfaces:
+ * nsIWebBrowser
+ * nsIWebBrowserSetup
+ * nsIInterfaceRequestor
+ *
+ * @note This contract does not guarantee implementation of any other
+ * interfaces and does not guarantee ability to get any particular
+ * interfaces via the nsIInterfaceRequestor implementation.
+ */
+#define NS_WEBBROWSER_CONTRACTID "@mozilla.org/embedding/browser/nsWebBrowser;1"
+
+/**
+ * Prompt Service ContractID
+ *   The prompt service (which can be gotten by calling getServiceByContractID
+ *   on this ContractID) is the way to pose various prompts, alerts,
+ *   and confirmation dialogs to the user.
+ *
+ * This contract implements the following interfaces:
+ * nsIPromptService
+ *
+ * Embedders may override this ContractID with their own implementation if they
+ * want more control over the way prompts, alerts, and confirmation dialogs are
+ * presented to the user.
+ */
+#define NS_PROMPTSERVICE_CONTRACTID "@mozilla.org/prompter;1"
+
+#endif  // NSEMBEDCID_H
diff --git a/toolkit/components/browser/nsIPrintPreviewNavigation.idl b/toolkit/components/browser/nsIPrintPreviewNavigation.idl
new file mode 100644
index 0000000000..2a7676265d
--- /dev/null
+++ b/toolkit/components/browser/nsIPrintPreviewNavigation.idl
@@ -0,0 +1,52 @@
+/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * 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/. */
+
+#include "nsISupports.idl"
+
+
+/**
+ * The nsIPrintPreviewNavigation
+ */
+[scriptable, uuid(8148E3F1-2E8B-11d5-A86C-00105A183419)]
+interface nsIPrintPreviewNavigation  : nsISupports
+{
+
+  readonly attribute long pageCount;
+
+
+  /**
+   * Preview the next Page
+   *
+   * Return - PR_TRUE if success
+   */
+  boolean nextPage();
+
+  /**
+   * Preview the previous Page
+   *
+   * Return - PR_TRUE if success
+   */
+  boolean previousPage();
+
+  /**
+   * Go to a page to preview
+   *
+   * aPageNumber - Page to go preview
+   * Return - PR_TRUE if success
+   */
+  boolean goToPage(unsigned long aPageNumber);
+
+
+  /**
+   * Skip pages
+   *
+   * aNumPages - number of pages to skip including the current page. Neg. goes back
+   * Return - true if success
+   */
+  boolean skipPages(long aNumPages);
+
+
+};
diff --git a/toolkit/components/browser/nsIWebBrowser.idl b/toolkit/components/browser/nsIWebBrowser.idl
new file mode 100644
index 0000000000..a644dcd31e
--- /dev/null
+++ b/toolkit/components/browser/nsIWebBrowser.idl
@@ -0,0 +1,81 @@
+/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * 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/. */
+
+#include "nsISupports.idl"
+
+interface nsIInterfaceRequestor;
+interface nsIWebBrowserChrome;
+interface nsIURIContentListener;
+interface mozIDOMWindowProxy;
+interface nsIWeakReference;
+
+%{C++
+namespace mozilla {
+class OriginAttributes;
+}
+%}
+
+[ref] native const_OriginAttributesRef(const mozilla::OriginAttributes);
+
+/**
+ * The nsIWebBrowser interface is implemented by web browser objects.
+ * Embedders use this interface during initialisation to associate
+ * the new web browser instance with the embedders chrome and
+ * to register any listeners. The interface may also be used at runtime
+ * to obtain the content DOM window and from that the rest of the DOM.
+ */
+[scriptable, builtinclass, uuid(4052b6da-4faa-4646-b3a1-7e16a01c2dc2)]
+interface nsIWebBrowser : nsISupports
+{
+    /**
+     * The chrome object associated with the browser instance. The embedder
+     * must create one chrome object for <I>each</I> browser object
+     * that is instantiated. The embedder must associate the two by setting
+     * this property to point to the chrome object before creating the browser
+     * window via the browser's <CODE>nsIBaseWindow</CODE> interface.
+     *
+     * The chrome may optionally implement <CODE>nsIInterfaceRequestor</CODE>,
+     * <CODE>nsIWebBrowserChromeFocus</CODE>,
+     * <CODE>nsIContextMenuListener</CODE> and
+     * <CODE>nsITooltipListener</CODE> to receive additional notifications
+     * from the browser object.
+     *
+     * The chrome object may optionally implement
+     * <CODE>nsIWebProgressListener</CODE> to register a progress listener
+     * object. If the implementation does this, it must also implement
+     * <CODE>nsIWeakReference</CODE>.
+     *
+     * @note The implementation should not refcount the supplied chrome
+     *       object; it should assume that a non <CODE>nullptr</CODE> value is
+     *       always valid. The embedder must explicitly set this value back
+     *       to nullptr if the chrome object is destroyed before the browser
+     *       object.
+     *
+     * @see nsIBaseWindow
+     * @see nsIWebBrowserChrome
+     * @see nsIInterfaceRequestor
+     * @see nsIWebBrowserChromeFocus
+     * @see nsIContextMenuListener
+     * @see nsITooltipListener
+     * @see nsIWeakReference
+     * @see nsIWebProgressListener
+     */
+    attribute nsIWebBrowserChrome containerWindow;
+
+    /**
+     * The top-level DOM window. The embedder may walk the entire
+     * DOM starting from this value.
+     */
+    readonly attribute mozIDOMWindowProxy contentDOMWindow;
+
+    /**
+     * Set Origin Attributes on the nsIWebBrowser.
+     * The Origin Attributes will be passed to the docshell once it has been
+     * created
+     */
+    [noscript, notxpcom, nostdcall, binaryname(SetOriginAttributes)]
+    void binarySetOriginAttributes(in const_OriginAttributesRef aOriginAttrs);
+};
diff --git a/toolkit/components/browser/nsIWebBrowserChrome.idl b/toolkit/components/browser/nsIWebBrowserChrome.idl
new file mode 100644
index 0000000000..54de3abab5
--- /dev/null
+++ b/toolkit/components/browser/nsIWebBrowserChrome.idl
@@ -0,0 +1,142 @@
+/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * 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/. */
+
+#include "nsISupports.idl"
+#include "nsIBaseWindow.idl"
+
+interface nsIWebBrowser;
+interface nsIDocShellTreeItem;
+
+/**
+ * nsIWebBrowserChrome corresponds to the top-level, outermost window
+ * containing an embedded Gecko web browser.
+ */
+
+[scriptable, uuid(E8C414C4-DC38-4BA3-AB4E-EC4CBBE22907)]
+interface nsIWebBrowserChrome : nsISupports
+{
+    /**
+     * Called when the link hover status is being changed.
+     * @param status status string. empty string is an acceptable value
+     *               meaning no link is hovered.
+     */
+    void setLinkStatus(in AString status);
+
+    /**
+     * Definitions for the chrome flags
+     */
+    const unsigned long CHROME_DEFAULT                = 0x00000001;
+    const unsigned long CHROME_WINDOW_BORDERS         = 0x00000002;
+    const unsigned long CHROME_WINDOW_CLOSE           = 0x00000004;
+    const unsigned long CHROME_WINDOW_RESIZE          = 0x00000008;
+    const unsigned long CHROME_MENUBAR                = 0x00000010;
+    const unsigned long CHROME_TOOLBAR                = 0x00000020;
+    const unsigned long CHROME_LOCATIONBAR            = 0x00000040;
+    const unsigned long CHROME_STATUSBAR              = 0x00000080;
+    const unsigned long CHROME_PERSONAL_TOOLBAR       = 0x00000100;
+    const unsigned long CHROME_SCROLLBARS             = 0x00000200;
+    const unsigned long CHROME_TITLEBAR               = 0x00000400;
+    const unsigned long CHROME_EXTRA                  = 0x00000800;
+
+    // createBrowserWindow specific flags
+    const unsigned long CHROME_WITH_SIZE              = 0x00001000;
+    const unsigned long CHROME_WITH_POSITION          = 0x00002000;
+
+    // special cases
+    const unsigned long CHROME_WINDOW_MIN             = 0x00004000;
+    const unsigned long CHROME_WINDOW_POPUP           = 0x00008000;
+
+    // whether to open a new private window.  CHROME_NON_PRIVATE_WINDOW
+    // forces the opened window to be non-private, and overrides
+    // CHROME_PRIVATE_WINDOW if it's set.  CHROME_PRIVATE_WINDOW
+    // forces the opened window to be private.  If neither of these
+    // flags are specified, the opened window will inherit the privacy
+    // status of its opener.  If there is no opener window, the new
+    // window will be non-private.
+    //
+    // CHROME_PRIVATE_LIFETIME causes the docshell to affect private-browsing
+    // session lifetime.  This flag is currently respected only for remote
+    // docshells.
+    const unsigned long CHROME_PRIVATE_WINDOW         = 0x00010000;
+    const unsigned long CHROME_NON_PRIVATE_WINDOW     = 0x00020000;
+    const unsigned long CHROME_PRIVATE_LIFETIME       = 0x00040000;
+    const unsigned long CHROME_ALWAYS_ON_TOP          = 0x00080000;
+
+    // Whether this window should use remote (out-of-process) tabs.
+    const unsigned long CHROME_REMOTE_WINDOW          = 0x00100000;
+
+    // Whether this window should use out-of-process cross-origin subframes.
+    const unsigned long CHROME_FISSION_WINDOW         = 0x00200000;
+
+    // Prevents new window animations on MacOS and Windows. Currently
+    // ignored for Linux.
+    const unsigned long CHROME_SUPPRESS_ANIMATION     = 0x01000000;
+
+    const unsigned long CHROME_WINDOW_RAISED          = 0x02000000;
+    const unsigned long CHROME_WINDOW_LOWERED         = 0x04000000;
+    const unsigned long CHROME_CENTER_SCREEN          = 0x08000000;
+
+    // Make the new window dependent on the parent.  This flag is only
+    // meaningful if CHROME_OPENAS_CHROME is set; content windows should not be
+    // dependent.
+    const unsigned long CHROME_DEPENDENT              = 0x10000000;
+
+    // Note: The modal style bit just affects the way the window looks and does
+    //       mean it's actually modal.
+    const unsigned long CHROME_MODAL                  = 0x20000000;
+    const unsigned long CHROME_OPENAS_DIALOG          = 0x40000000;
+    const unsigned long CHROME_OPENAS_CHROME          = 0x80000000;
+
+    const unsigned long CHROME_ALL                    = 0x00000ffe;
+
+    const unsigned long CHROME_MINIMAL_POPUP =
+      CHROME_WINDOW_BORDERS | CHROME_WINDOW_CLOSE | CHROME_WINDOW_RESIZE |
+      CHROME_LOCATIONBAR | CHROME_STATUSBAR | CHROME_SCROLLBARS |
+      CHROME_TITLEBAR | CHROME_WINDOW_MIN;
+
+    /**
+     * The chrome flags for this browser chrome. The implementation should
+     * reflect the value of this attribute by hiding or showing its chrome
+     * appropriately.
+     */
+    attribute unsigned long chromeFlags;
+
+    /**
+     * Shows the window as a modal window.
+     */
+    void showAsModal();
+
+    /**
+     * Is the window modal (that is, currently executing a modal loop)?
+     * @return true if it's a modal window
+     */
+    boolean isWindowModal();
+
+    /**
+     * Allows to request the change of individual dimensions of a window
+     * without specifying all dimensions.
+     *
+     * Gets called as fallback when no nsIBaseWindow is available.
+     *
+     * @see nsIBaseWindow
+     */
+    void setDimensions(in DimensionRequest aRequest);
+
+    /**
+     * Gets the dimensions of the window. The caller may pass
+     * <CODE>nullptr</CODE> for any value it is uninterested in receiving.
+     *
+     * Gets called as fallback when no nsIBaseWindow is available.
+     *
+     * @see nsIBaseWindow
+     */
+    void getDimensions(in DimensionKind aDimensionKind, out long aX, out long aY, out long aCX, out long aCY);
+
+    /**
+     * Blur the window. This should unfocus the window and send an onblur event.
+     */
+    void blur();
+};
diff --git a/toolkit/components/browser/nsIWebBrowserChromeFocus.idl b/toolkit/components/browser/nsIWebBrowserChromeFocus.idl
new file mode 100644
index 0000000000..ee24155b51
--- /dev/null
+++ b/toolkit/components/browser/nsIWebBrowserChromeFocus.idl
@@ -0,0 +1,32 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 0 -*-
+ *
+ * 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/. */
+
+#include "nsISupports.idl"
+
+/**
+ * The nsIWebBrowserChromeFocus is implemented by the same object as the
+ * nsIEmbeddingSiteWindow. It represents the focus up-calls from mozilla
+ * to the embedding chrome. See mozilla bug #70224 for gratuitous info.
+ */
+
+[scriptable, uuid(947B2EE6-51ED-4C2B-9F45-426C27CA84C6)]
+interface nsIWebBrowserChromeFocus : nsISupports
+{
+    /**
+     * Set the focus at the next focusable element in the chrome. If
+     * aForDocumentNavigation is true, this was a document navigation, so
+     * focus the parent window.
+     */
+
+    void focusNextElement(in bool aForDocumentNavigation);
+
+    /**
+     * Set the focus at the previous focusable element in the chrome.
+     */
+
+    void focusPrevElement(in bool aForDocumentNavigation);
+
+};
diff --git a/toolkit/components/browser/nsIWebBrowserPrint.idl b/toolkit/components/browser/nsIWebBrowserPrint.idl
new file mode 100644
index 0000000000..5a900b7b65
--- /dev/null
+++ b/toolkit/components/browser/nsIWebBrowserPrint.idl
@@ -0,0 +1,129 @@
+/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * 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/. */
+
+#include "nsISupports.idl"
+
+%{C++
+#include <functional>
+
+namespace mozilla {
+namespace dom {
+class PrintPreviewResultInfo;
+} // namespace dom
+namespace layout {
+class RemotePrintJobChild;
+} // namespace layout
+} // namespace mozilla
+%}
+
+interface mozIDOMWindowProxy;
+interface nsIPrintSettings;
+interface nsIWebProgressListener;
+
+native PrintPreviewResolver(std::function<void(const mozilla::dom::PrintPreviewResultInfo&)>&&);
+[ptr] native RemotePrintJobChildPtr(mozilla::layout::RemotePrintJobChild);
+
+/**
+ * nsIWebBrowserPrint corresponds to the main interface
+ * for printing an embedded Gecko web browser window/document
+ */
+[scriptable, uuid(c9a934ed-fff1-4971-bfba-6c25ad70e1e6)]
+interface nsIWebBrowserPrint : nsISupports
+{
+  /**
+   * PrintPreview Navigation Constants
+   *
+   * XXXdholbert Consider renaming these? Strictly speaking, these deal with
+   * *sheets* (which are roughly the same as pages in the default configuration
+   * of one page per sheet). Fix in bug 1669762.
+   */
+  const short PRINTPREVIEW_GOTO_PAGENUM = 0;
+  const short PRINTPREVIEW_PREV_PAGE    = 1;
+  const short PRINTPREVIEW_NEXT_PAGE    = 2;
+  const short PRINTPREVIEW_HOME         = 3;
+  const short PRINTPREVIEW_END          = 4;
+
+  /**
+   * Returns whether it is in Print mode
+   */
+  readonly attribute boolean doingPrint;
+
+  /**
+   * Returns whether it is in Print Preview mode
+   */
+  readonly attribute boolean doingPrintPreview;
+
+  /**
+   * This represents the "raw" total number of pages, where "raw" means that
+   * this value is *not amended* to account for reductions from pages-per-sheet
+   * or page ranges (unlike other APIs on this interface).
+   *
+   * So e.g. for a 20-page document, this attribute will be 20, regardless of
+   * whether the user has chosen a smaller page range, and regardless of
+   * whether the user is using pages-per-sheet to reduce the number of sheets.
+   */
+  readonly attribute long rawNumPages;
+
+  /**
+   * This returns the total number of pages for the Print Preview
+   *
+   * XXXdholbert Consider renaming this? Strictly speaking, this is the number
+   * of *sheets* (which is the same as the number of pages in the default
+   * configuration of one page per sheet). Fix in bug 1669762.
+   */
+  readonly attribute long printPreviewNumPages;
+
+  /**
+   * This returns the number of the page which is currently in the Print Preview viewport
+   *
+   * XXXdholbert Consider renaming this? (similar to printPreviewNumPages above)
+   * Strictly speaking, this is the number of the *sheet* which is currently in
+   * the print preview viewport. Fix in bug 1669762.
+   */
+  readonly attribute long printPreviewCurrentPageNumber;
+
+  /**
+   * Print the specified DOM window
+   *
+   * @param aThePrintSettings - Printer Settings for the print job, if aThePrintSettings is null
+   *                            then the global PS will be used.
+   * @param aWPListener - is updated during the print
+   * @return void
+   *
+   * @note To cancel, close the window of the document that is being printed.
+   */
+  [noscript] void print(in nsIPrintSettings aThePrintSettings,
+                        in RemotePrintJobChildPtr aRemotePrintJob,
+                        in nsIWebProgressListener aWPListener);
+
+  /**
+   * Print Preview the specified DOM window
+   *
+   * @param aThePrintSettings - Printer Settings for the print preview, if aThePrintSettings is null
+   *                            then the global PS will be used.
+   * @param aWPListener - is updated during the printpreview
+   * @return void
+   *
+   * @note To cancel, close the print preview document's window.
+   */
+  [noscript] void printPreview(in nsIPrintSettings aThePrintSettings,
+                               in nsIWebProgressListener aWPListener,
+                               in PrintPreviewResolver aCallback);
+
+  /**
+   * @param aNavType - navigation enum
+   * @param aPageNum - page num to navigate to when aNavType = ePrintPreviewGoToPageNum
+   * @return void
+   */
+  void printPreviewScrollToPage(in short aNavType, in long aPageNum);
+
+  /**
+   * This exists PrintPreview mode and returns browser window to galley mode
+   * @return void
+   */
+  void exitPrintPreview();
+
+};
diff --git a/toolkit/components/browser/nsWebBrowser.cpp b/toolkit/components/browser/nsWebBrowser.cpp
new file mode 100644
index 0000000000..53ed9eb1a4
--- /dev/null
+++ b/toolkit/components/browser/nsWebBrowser.cpp
@@ -0,0 +1,1241 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+// Local Includes
+#include "nsWebBrowser.h"
+
+// Helper Classes
+#include "nsGfxCIID.h"
+#include "nsWidgetsCID.h"
+
+#include "gfxUtils.h"
+#include "mozilla/gfx/2D.h"
+
+// Interfaces Needed
+#include "gfxContext.h"
+#include "nsReadableUtils.h"
+#include "nsIInterfaceRequestor.h"
+#include "nsIInterfaceRequestorUtils.h"
+#include "nsIWebBrowserChrome.h"
+#include "nsPIDOMWindow.h"
+#include "nsIWebProgress.h"
+#include "nsIWebProgressListener.h"
+#include "nsIURI.h"
+#include "nsIWebBrowserPersist.h"
+#include "nsFocusManager.h"
+#include "nsILoadContext.h"
+#include "nsComponentManagerUtils.h"
+#include "nsDocShell.h"
+#include "nsServiceManagerUtils.h"
+#include "WindowRenderer.h"
+
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/BrowsingContext.h"
+#include "mozilla/dom/LoadURIOptionsBinding.h"
+#include "mozilla/dom/WindowGlobalChild.h"
+
+// for painting the background window
+#include "mozilla/LookAndFeel.h"
+#include "mozilla/ServoStyleConsts.h"
+
+// Printing Includes
+#ifdef NS_PRINTING
+#  include "nsIWebBrowserPrint.h"
+#  include "nsIContentViewer.h"
+#endif
+
+// PSM2 includes
+#include "nsISecureBrowserUI.h"
+#include "nsXULAppAPI.h"
+
+using namespace mozilla;
+using namespace mozilla::gfx;
+using namespace mozilla::layers;
+
+nsWebBrowser::nsWebBrowser(int aItemType)
+    : mContentType(aItemType),
+      mShouldEnableHistory(true),
+      mWillChangeProcess(false),
+      mParentNativeWindow(nullptr),
+      mProgressListener(nullptr),
+      mWidgetListenerDelegate(this),
+      mBackgroundColor(0),
+      mPersistCurrentState(nsIWebBrowserPersist::PERSIST_STATE_READY),
+      mPersistResult(NS_OK),
+      mPersistFlags(nsIWebBrowserPersist::PERSIST_FLAGS_NONE),
+      mParentWidget(nullptr) {
+  mWWatch = do_GetService(NS_WINDOWWATCHER_CONTRACTID);
+  NS_ASSERTION(mWWatch, "failed to get WindowWatcher");
+}
+
+nsWebBrowser::~nsWebBrowser() { InternalDestroy(); }
+
+nsIWidget* nsWebBrowser::EnsureWidget() {
+  if (mParentWidget) {
+    return mParentWidget;
+  }
+
+  mInternalWidget = nsIWidget::CreateChildWindow();
+  if (NS_WARN_IF(!mInternalWidget)) {
+    return nullptr;
+  }
+
+  widget::InitData widgetInit;
+  widgetInit.mClipChildren = true;
+  widgetInit.mWindowType = widget::WindowType::Child;
+  LayoutDeviceIntRect bounds(0, 0, 0, 0);
+
+  mInternalWidget->SetWidgetListener(&mWidgetListenerDelegate);
+  NS_ENSURE_SUCCESS(mInternalWidget->Create(nullptr, mParentNativeWindow,
+                                            bounds, &widgetInit),
+                    nullptr);
+
+  return mInternalWidget;
+}
+
+/* static */
+already_AddRefed<nsWebBrowser> nsWebBrowser::Create(
+    nsIWebBrowserChrome* aContainerWindow, nsIWidget* aParentWidget,
+    dom::BrowsingContext* aBrowsingContext,
+    dom::WindowGlobalChild* aInitialWindowChild) {
+  MOZ_ASSERT_IF(aInitialWindowChild,
+                aInitialWindowChild->BrowsingContext() == aBrowsingContext);
+
+  RefPtr<nsWebBrowser> browser = new nsWebBrowser(
+      aBrowsingContext->IsContent() ? typeContentWrapper : typeChromeWrapper);
+
+  // nsWebBrowser::SetContainer also calls nsWebBrowser::EnsureDocShellTreeOwner
+  NS_ENSURE_SUCCESS(browser->SetContainerWindow(aContainerWindow), nullptr);
+  NS_ENSURE_SUCCESS(browser->SetParentWidget(aParentWidget), nullptr);
+
+  nsCOMPtr<nsIWidget> docShellParentWidget = browser->EnsureWidget();
+  if (NS_WARN_IF(!docShellParentWidget)) {
+    return nullptr;
+  }
+
+  uint64_t outerWindowId =
+      aInitialWindowChild ? aInitialWindowChild->OuterWindowId() : 0;
+
+  RefPtr<nsDocShell> docShell =
+      nsDocShell::Create(aBrowsingContext, outerWindowId);
+  if (NS_WARN_IF(!docShell)) {
+    return nullptr;
+  }
+  browser->SetDocShell(docShell);
+  MOZ_ASSERT(browser->mDocShell == docShell);
+
+  // get the system default window background colour
+  //
+  // TODO(emilio): Can we get the color-scheme from somewhere here?
+  browser->mBackgroundColor =
+      LookAndFeel::Color(LookAndFeel::ColorID::Window, ColorScheme::Light,
+                         LookAndFeel::UseStandins::No);
+
+  // HACK ALERT - this registration registers the nsDocShellTreeOwner as a
+  // nsIWebBrowserListener so it can setup its MouseListener in one of the
+  // progress callbacks. If we can register the MouseListener another way, this
+  // registration can go away, and nsDocShellTreeOwner can stop implementing
+  // nsIWebProgressListener.
+  RefPtr<nsDocShellTreeOwner> docShellTreeOwner = browser->mDocShellTreeOwner;
+  Unused << docShell->AddProgressListener(docShellTreeOwner,
+                                          nsIWebProgress::NOTIFY_ALL);
+
+  docShell->SetTreeOwner(docShellTreeOwner);
+
+  // If the webbrowser is a content docshell item then we won't hear any
+  // events from subframes. To solve that we install our own chrome event
+  // handler that always gets called (even for subframes) for any bubbling
+  // event.
+
+  nsresult rv = docShell->InitWindow(nullptr, docShellParentWidget, 0, 0, 0, 0);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return nullptr;
+  }
+
+  docShellTreeOwner->AddToWatcher();  // evil twin of Remove in SetDocShell(0)
+  docShellTreeOwner->AddChromeListeners();
+
+  if (aInitialWindowChild) {
+    docShell->CreateContentViewerForActor(aInitialWindowChild);
+  }
+
+  return browser.forget();
+}
+
+void nsWebBrowser::InternalDestroy() {
+  if (mInternalWidget) {
+    mInternalWidget->SetWidgetListener(nullptr);
+    mInternalWidget->Destroy();
+    mInternalWidget = nullptr;  // Force release here.
+  }
+
+  SetDocShell(nullptr);
+
+  if (mDocShellTreeOwner) {
+    mDocShellTreeOwner->WebBrowser(nullptr);
+    mDocShellTreeOwner = nullptr;
+  }
+}
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(nsWebBrowser)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(nsWebBrowser)
+
+NS_IMPL_CYCLE_COLLECTION_WEAK(nsWebBrowser, mDocShell)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsWebBrowser)
+  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIWebBrowser)
+  NS_INTERFACE_MAP_ENTRY(nsIWebBrowser)
+  NS_INTERFACE_MAP_ENTRY(nsIWebNavigation)
+  NS_INTERFACE_MAP_ENTRY(nsIBaseWindow)
+  NS_INTERFACE_MAP_ENTRY(nsIDocShellTreeItem)
+  NS_INTERFACE_MAP_ENTRY(nsIInterfaceRequestor)
+  NS_INTERFACE_MAP_ENTRY(nsIWebBrowserPersist)
+  NS_INTERFACE_MAP_ENTRY(nsICancelable)
+  NS_INTERFACE_MAP_ENTRY(nsIWebProgressListener)
+  NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
+NS_INTERFACE_MAP_END
+
+///*****************************************************************************
+// nsWebBrowser::nsIInterfaceRequestor
+//*****************************************************************************
+
+NS_IMETHODIMP
+nsWebBrowser::GetInterface(const nsIID& aIID, void** aSink) {
+  NS_ENSURE_ARG_POINTER(aSink);
+
+  if (NS_SUCCEEDED(QueryInterface(aIID, aSink))) {
+    return NS_OK;
+  }
+
+  if (mDocShell) {
+#ifdef NS_PRINTING
+    if (aIID.Equals(NS_GET_IID(nsIWebBrowserPrint))) {
+      nsCOMPtr<nsIContentViewer> viewer;
+      mDocShell->GetContentViewer(getter_AddRefs(viewer));
+      if (!viewer) {
+        return NS_NOINTERFACE;
+      }
+
+      nsCOMPtr<nsIWebBrowserPrint> webBrowserPrint(do_QueryInterface(viewer));
+      nsIWebBrowserPrint* print = (nsIWebBrowserPrint*)webBrowserPrint.get();
+      NS_ASSERTION(print, "This MUST support this interface!");
+      NS_ADDREF(print);
+      *aSink = print;
+      return NS_OK;
+    }
+#endif
+    return mDocShell->GetInterface(aIID, aSink);
+  }
+
+  return NS_NOINTERFACE;
+}
+
+//*****************************************************************************
+// nsWebBrowser::nsIWebBrowser
+//*****************************************************************************
+
+NS_IMETHODIMP
+nsWebBrowser::GetContainerWindow(nsIWebBrowserChrome** aTopWindow) {
+  NS_ENSURE_ARG_POINTER(aTopWindow);
+
+  nsCOMPtr<nsIWebBrowserChrome> top;
+  if (mDocShellTreeOwner) {
+    top = mDocShellTreeOwner->GetWebBrowserChrome();
+  }
+
+  top.forget(aTopWindow);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::SetContainerWindow(nsIWebBrowserChrome* aTopWindow) {
+  EnsureDocShellTreeOwner();
+  return mDocShellTreeOwner->SetWebBrowserChrome(aTopWindow);
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetContentDOMWindow(mozIDOMWindowProxy** aResult) {
+  if (!mDocShell) {
+    return NS_ERROR_UNEXPECTED;
+  }
+
+  nsCOMPtr<nsPIDOMWindowOuter> retval = mDocShell->GetWindow();
+  retval.forget(aResult);
+  return *aResult ? NS_OK : NS_ERROR_FAILURE;
+}
+
+void nsWebBrowser::SetOriginAttributes(const OriginAttributes& aAttrs) {
+  mOriginAttributes = aAttrs;
+}
+
+//*****************************************************************************
+// nsWebBrowser::nsIDocShellTreeItem
+//*****************************************************************************
+
+NS_IMETHODIMP
+nsWebBrowser::GetName(nsAString& aName) {
+  if (mDocShell) {
+    mDocShell->GetName(aName);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::SetName(const nsAString& aName) {
+  if (mDocShell) {
+    return mDocShell->SetName(aName);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::NameEquals(const nsAString& aName, bool* aResult) {
+  NS_ENSURE_ARG_POINTER(aResult);
+  if (mDocShell) {
+    return mDocShell->NameEquals(aName, aResult);
+  }
+
+  return NS_OK;
+}
+
+/* virtual */
+int32_t nsWebBrowser::ItemType() { return mContentType; }
+
+NS_IMETHODIMP
+nsWebBrowser::GetItemType(int32_t* aItemType) {
+  NS_ENSURE_ARG_POINTER(aItemType);
+
+  *aItemType = ItemType();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetInProcessParent(nsIDocShellTreeItem** aParent) {
+  *aParent = nullptr;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetInProcessSameTypeParent(nsIDocShellTreeItem** aParent) {
+  *aParent = nullptr;
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetInProcessRootTreeItem(nsIDocShellTreeItem** aRootTreeItem) {
+  NS_ENSURE_ARG_POINTER(aRootTreeItem);
+  *aRootTreeItem = static_cast<nsIDocShellTreeItem*>(this);
+
+  nsCOMPtr<nsIDocShellTreeItem> parent;
+  NS_ENSURE_SUCCESS(GetInProcessParent(getter_AddRefs(parent)),
+                    NS_ERROR_FAILURE);
+  while (parent) {
+    *aRootTreeItem = parent;
+    NS_ENSURE_SUCCESS(
+        (*aRootTreeItem)->GetInProcessParent(getter_AddRefs(parent)),
+        NS_ERROR_FAILURE);
+  }
+  NS_ADDREF(*aRootTreeItem);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetInProcessSameTypeRootTreeItem(
+    nsIDocShellTreeItem** aRootTreeItem) {
+  NS_ENSURE_ARG_POINTER(aRootTreeItem);
+  *aRootTreeItem = static_cast<nsIDocShellTreeItem*>(this);
+
+  nsCOMPtr<nsIDocShellTreeItem> parent;
+  NS_ENSURE_SUCCESS(GetInProcessSameTypeParent(getter_AddRefs(parent)),
+                    NS_ERROR_FAILURE);
+  while (parent) {
+    *aRootTreeItem = parent;
+    NS_ENSURE_SUCCESS(
+        (*aRootTreeItem)->GetInProcessSameTypeParent(getter_AddRefs(parent)),
+        NS_ERROR_FAILURE);
+  }
+  NS_ADDREF(*aRootTreeItem);
+  return NS_OK;
+}
+
+dom::Document* nsWebBrowser::GetDocument() {
+  return mDocShell ? mDocShell->GetDocument() : nullptr;
+}
+
+nsPIDOMWindowOuter* nsWebBrowser::GetWindow() {
+  return mDocShell ? mDocShell->GetWindow() : nullptr;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetBrowsingContextXPCOM(dom::BrowsingContext** aBrowsingContext) {
+  NS_ENSURE_STATE(mDocShell);
+  return mDocShell->GetBrowsingContextXPCOM(aBrowsingContext);
+}
+
+dom::BrowsingContext* nsWebBrowser::GetBrowsingContext() {
+  return mDocShell->GetBrowsingContext();
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetDomWindow(mozIDOMWindowProxy** aWindow) {
+  if (!mDocShell) return NS_ERROR_NOT_INITIALIZED;
+  return mDocShell->GetDomWindow(aWindow);
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetTreeOwner(nsIDocShellTreeOwner** aTreeOwner) {
+  NS_ENSURE_ARG_POINTER(aTreeOwner);
+  *aTreeOwner = nullptr;
+  if (mDocShellTreeOwner) {
+    if (mDocShellTreeOwner->mTreeOwner) {
+      *aTreeOwner = mDocShellTreeOwner->mTreeOwner;
+    } else {
+      *aTreeOwner = mDocShellTreeOwner;
+    }
+  }
+  NS_IF_ADDREF(*aTreeOwner);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::SetTreeOwner(nsIDocShellTreeOwner* aTreeOwner) {
+  EnsureDocShellTreeOwner();
+  return mDocShellTreeOwner->SetTreeOwner(aTreeOwner);
+}
+
+//*****************************************************************************
+// nsWebBrowser::nsIDocShellTreeItem
+//*****************************************************************************
+
+NS_IMETHODIMP
+nsWebBrowser::GetInProcessChildCount(int32_t* aChildCount) {
+  NS_ENSURE_ARG_POINTER(aChildCount);
+  *aChildCount = 0;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::AddChild(nsIDocShellTreeItem* aChild) {
+  return NS_ERROR_UNEXPECTED;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::RemoveChild(nsIDocShellTreeItem* aChild) {
+  return NS_ERROR_UNEXPECTED;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetInProcessChildAt(int32_t aIndex,
+                                  nsIDocShellTreeItem** aChild) {
+  return NS_ERROR_UNEXPECTED;
+}
+
+//*****************************************************************************
+// nsWebBrowser::nsIWebNavigation
+//*****************************************************************************
+
+NS_IMETHODIMP
+nsWebBrowser::GetCanGoBack(bool* aCanGoBack) {
+  NS_ENSURE_STATE(mDocShell);
+
+  return mDocShell->GetCanGoBack(aCanGoBack);
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetCanGoForward(bool* aCanGoForward) {
+  NS_ENSURE_STATE(mDocShell);
+
+  return mDocShell->GetCanGoForward(aCanGoForward);
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GoBack(bool aRequireUserInteraction, bool aUserActivation) {
+  NS_ENSURE_STATE(mDocShell);
+
+  RefPtr<nsDocShell> docShell = mDocShell;
+  return docShell->GoBack(aRequireUserInteraction, aUserActivation);
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GoForward(bool aRequireUserInteraction, bool aUserActivation) {
+  NS_ENSURE_STATE(mDocShell);
+
+  RefPtr<nsDocShell> docShell = mDocShell;
+  return docShell->GoForward(aRequireUserInteraction, aUserActivation);
+}
+
+nsresult nsWebBrowser::LoadURI(nsIURI* aURI,
+                               const dom::LoadURIOptions& aLoadURIOptions) {
+#ifndef ANDROID
+  MOZ_ASSERT(aLoadURIOptions.mTriggeringPrincipal,
+             "nsWebBrowser::LoadURI - Need a valid triggeringPrincipal");
+#endif
+  NS_ENSURE_STATE(mDocShell);
+
+  RefPtr<nsDocShell> docShell = mDocShell;
+  return docShell->LoadURI(aURI, aLoadURIOptions);
+}
+
+NS_IMETHODIMP
+nsWebBrowser::LoadURIFromScript(nsIURI* aURI,
+                                JS::Handle<JS::Value> aLoadURIOptions,
+                                JSContext* aCx) {
+  // generate dictionary for loadURIOptions and forward call
+  dom::LoadURIOptions loadURIOptions;
+  if (!loadURIOptions.Init(aCx, aLoadURIOptions)) {
+    return NS_ERROR_INVALID_ARG;
+  }
+  return LoadURI(aURI, loadURIOptions);
+}
+
+nsresult nsWebBrowser::FixupAndLoadURIString(
+    const nsAString& aURI, const dom::LoadURIOptions& aLoadURIOptions) {
+#ifndef ANDROID
+  MOZ_ASSERT(
+      aLoadURIOptions.mTriggeringPrincipal,
+      "nsWebBrowser::FixupAndLoadURIString - Need a valid triggeringPrincipal");
+#endif
+  NS_ENSURE_STATE(mDocShell);
+
+  RefPtr<nsDocShell> docShell = mDocShell;
+  return docShell->FixupAndLoadURIString(aURI, aLoadURIOptions);
+}
+
+NS_IMETHODIMP
+nsWebBrowser::FixupAndLoadURIStringFromScript(
+    const nsAString& aURI, JS::Handle<JS::Value> aLoadURIOptions,
+    JSContext* aCx) {
+  // generate dictionary for loadURIOptions and forward call
+  dom::LoadURIOptions loadURIOptions;
+  if (!loadURIOptions.Init(aCx, aLoadURIOptions)) {
+    return NS_ERROR_INVALID_ARG;
+  }
+  return FixupAndLoadURIString(aURI, loadURIOptions);
+}
+
+NS_IMETHODIMP
+nsWebBrowser::ResumeRedirectedLoad(uint64_t aIdentifier,
+                                   int32_t aHistoryIndex) {
+  NS_ENSURE_STATE(mDocShell);
+
+  return mDocShell->ResumeRedirectedLoad(aIdentifier, aHistoryIndex);
+}
+
+NS_IMETHODIMP
+nsWebBrowser::Reload(uint32_t aReloadFlags) {
+  NS_ENSURE_STATE(mDocShell);
+
+  RefPtr<nsDocShell> docShell = mDocShell;
+  return docShell->Reload(aReloadFlags);
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GotoIndex(int32_t aIndex, bool aUserActivation) {
+  NS_ENSURE_STATE(mDocShell);
+
+  RefPtr<nsDocShell> docShell = mDocShell;
+  return docShell->GotoIndex(aIndex, aUserActivation);
+}
+
+NS_IMETHODIMP
+nsWebBrowser::Stop(uint32_t aStopFlags) {
+  NS_ENSURE_STATE(mDocShell);
+
+  return mDocShell->Stop(aStopFlags);
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetCurrentURI(nsIURI** aURI) {
+  NS_ENSURE_STATE(mDocShell);
+
+  return mDocShell->GetCurrentURI(aURI);
+}
+
+// XXX(nika): Consider making the mozilla::dom::ChildSHistory version the
+// canonical one?
+NS_IMETHODIMP
+nsWebBrowser::GetSessionHistoryXPCOM(nsISupports** aSessionHistory) {
+  NS_ENSURE_ARG_POINTER(aSessionHistory);
+  *aSessionHistory = nullptr;
+  if (mDocShell) {
+    return mDocShell->GetSessionHistoryXPCOM(aSessionHistory);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetDocument(dom::Document** aDocument) {
+  NS_ENSURE_STATE(mDocShell);
+
+  return mDocShell->GetDocument(aDocument);
+}
+
+void nsWebBrowser::SetAllowDNSPrefetch(bool aAllowPrefetch) {
+  MOZ_ASSERT(mDocShell);
+  mDocShell->SetAllowDNSPrefetch(aAllowPrefetch);
+}
+
+//*****************************************************************************
+// nsWebBrowser::nsIWebProgressListener
+//*****************************************************************************
+
+NS_IMETHODIMP
+nsWebBrowser::OnStateChange(nsIWebProgress* aWebProgress, nsIRequest* aRequest,
+                            uint32_t aStateFlags, nsresult aStatus) {
+  if (mPersist) {
+    mPersist->GetCurrentState(&mPersistCurrentState);
+  }
+  if (aStateFlags & STATE_IS_NETWORK && aStateFlags & STATE_STOP) {
+    mPersist = nullptr;
+  }
+  if (mProgressListener) {
+    return mProgressListener->OnStateChange(aWebProgress, aRequest, aStateFlags,
+                                            aStatus);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::OnProgressChange(nsIWebProgress* aWebProgress,
+                               nsIRequest* aRequest, int32_t aCurSelfProgress,
+                               int32_t aMaxSelfProgress,
+                               int32_t aCurTotalProgress,
+                               int32_t aMaxTotalProgress) {
+  if (mPersist) {
+    mPersist->GetCurrentState(&mPersistCurrentState);
+  }
+  if (mProgressListener) {
+    return mProgressListener->OnProgressChange(
+        aWebProgress, aRequest, aCurSelfProgress, aMaxSelfProgress,
+        aCurTotalProgress, aMaxTotalProgress);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::OnLocationChange(nsIWebProgress* aWebProgress,
+                               nsIRequest* aRequest, nsIURI* aLocation,
+                               uint32_t aFlags) {
+  if (mProgressListener) {
+    return mProgressListener->OnLocationChange(aWebProgress, aRequest,
+                                               aLocation, aFlags);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::OnStatusChange(nsIWebProgress* aWebProgress, nsIRequest* aRequest,
+                             nsresult aStatus, const char16_t* aMessage) {
+  if (mProgressListener) {
+    return mProgressListener->OnStatusChange(aWebProgress, aRequest, aStatus,
+                                             aMessage);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::OnSecurityChange(nsIWebProgress* aWebProgress,
+                               nsIRequest* aRequest, uint32_t aState) {
+  if (mProgressListener) {
+    return mProgressListener->OnSecurityChange(aWebProgress, aRequest, aState);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::OnContentBlockingEvent(nsIWebProgress* aWebProgress,
+                                     nsIRequest* aRequest, uint32_t aEvent) {
+  if (mProgressListener) {
+    return mProgressListener->OnContentBlockingEvent(aWebProgress, aRequest,
+                                                     aEvent);
+  }
+  return NS_OK;
+}
+
+//*****************************************************************************
+// nsWebBrowser::nsIWebBrowserPersist
+//*****************************************************************************
+
+NS_IMETHODIMP
+nsWebBrowser::GetPersistFlags(uint32_t* aPersistFlags) {
+  NS_ENSURE_ARG_POINTER(aPersistFlags);
+  nsresult rv = NS_OK;
+  if (mPersist) {
+    rv = mPersist->GetPersistFlags(&mPersistFlags);
+  }
+  *aPersistFlags = mPersistFlags;
+  return rv;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::SetPersistFlags(uint32_t aPersistFlags) {
+  nsresult rv = NS_OK;
+  mPersistFlags = aPersistFlags;
+  if (mPersist) {
+    rv = mPersist->SetPersistFlags(mPersistFlags);
+    mPersist->GetPersistFlags(&mPersistFlags);
+  }
+  return rv;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetCurrentState(uint32_t* aCurrentState) {
+  NS_ENSURE_ARG_POINTER(aCurrentState);
+  if (mPersist) {
+    mPersist->GetCurrentState(&mPersistCurrentState);
+  }
+  *aCurrentState = mPersistCurrentState;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetResult(nsresult* aResult) {
+  NS_ENSURE_ARG_POINTER(aResult);
+  if (mPersist) {
+    mPersist->GetResult(&mPersistResult);
+  }
+  *aResult = mPersistResult;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetProgressListener(nsIWebProgressListener** aProgressListener) {
+  NS_ENSURE_ARG_POINTER(aProgressListener);
+  *aProgressListener = mProgressListener;
+  NS_IF_ADDREF(*aProgressListener);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::SetProgressListener(nsIWebProgressListener* aProgressListener) {
+  mProgressListener = aProgressListener;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::SaveURI(nsIURI* aURI, nsIPrincipal* aPrincipal,
+                      uint32_t aCacheKey, nsIReferrerInfo* aReferrerInfo,
+                      nsICookieJarSettings* aCookieJarSettings,
+                      nsIInputStream* aPostData, const char* aExtraHeaders,
+                      nsISupports* aFile,
+                      nsContentPolicyType aContentPolicyType, bool aIsPrivate) {
+  if (mPersist) {
+    uint32_t currentState;
+    mPersist->GetCurrentState(&currentState);
+    if (currentState == PERSIST_STATE_FINISHED) {
+      mPersist = nullptr;
+    } else {
+      // You can't save again until the last save has completed
+      return NS_ERROR_FAILURE;
+    }
+  }
+
+  nsCOMPtr<nsIURI> uri;
+  if (aURI) {
+    uri = aURI;
+  } else {
+    nsresult rv = GetCurrentURI(getter_AddRefs(uri));
+    if (NS_FAILED(rv)) {
+      return NS_ERROR_FAILURE;
+    }
+  }
+
+  // Create a throwaway persistence object to do the work
+  nsresult rv;
+  mPersist = do_CreateInstance(NS_WEBBROWSERPERSIST_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+  mPersist->SetProgressListener(this);
+  mPersist->SetPersistFlags(mPersistFlags);
+  mPersist->GetCurrentState(&mPersistCurrentState);
+
+  rv = mPersist->SaveURI(uri, aPrincipal, aCacheKey, aReferrerInfo,
+                         aCookieJarSettings, aPostData, aExtraHeaders, aFile,
+                         aContentPolicyType, aIsPrivate);
+  if (NS_FAILED(rv)) {
+    mPersist = nullptr;
+  }
+  return rv;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::SaveChannel(nsIChannel* aChannel, nsISupports* aFile) {
+  if (mPersist) {
+    uint32_t currentState;
+    mPersist->GetCurrentState(&currentState);
+    if (currentState == PERSIST_STATE_FINISHED) {
+      mPersist = nullptr;
+    } else {
+      // You can't save again until the last save has completed
+      return NS_ERROR_FAILURE;
+    }
+  }
+
+  // Create a throwaway persistence object to do the work
+  nsresult rv;
+  mPersist = do_CreateInstance(NS_WEBBROWSERPERSIST_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+  mPersist->SetProgressListener(this);
+  mPersist->SetPersistFlags(mPersistFlags);
+  mPersist->GetCurrentState(&mPersistCurrentState);
+  rv = mPersist->SaveChannel(aChannel, aFile);
+  if (NS_FAILED(rv)) {
+    mPersist = nullptr;
+  }
+  return rv;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::SaveDocument(nsISupports* aDocumentish, nsISupports* aFile,
+                           nsISupports* aDataPath,
+                           const char* aOutputContentType,
+                           uint32_t aEncodingFlags, uint32_t aWrapColumn) {
+  if (mPersist) {
+    uint32_t currentState;
+    mPersist->GetCurrentState(&currentState);
+    if (currentState == PERSIST_STATE_FINISHED) {
+      mPersist = nullptr;
+    } else {
+      // You can't save again until the last save has completed
+      return NS_ERROR_FAILURE;
+    }
+  }
+
+  // Use the specified DOM document, or if none is specified, the one
+  // attached to the web browser.
+
+  nsCOMPtr<nsISupports> doc;
+  if (aDocumentish) {
+    doc = aDocumentish;
+  } else {
+    RefPtr<dom::Document> domDoc;
+    GetDocument(getter_AddRefs(domDoc));
+    doc = already_AddRefed<nsISupports>(ToSupports(domDoc.forget().take()));
+  }
+  if (!doc) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // Create a throwaway persistence object to do the work
+  nsresult rv;
+  mPersist = do_CreateInstance(NS_WEBBROWSERPERSIST_CONTRACTID, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+  RefPtr<nsIWebBrowserPersist> localPersist(mPersist);
+  Unused << localPersist;
+  mPersist->SetProgressListener(this);
+  mPersist->SetPersistFlags(mPersistFlags);
+  mPersist->GetCurrentState(&mPersistCurrentState);
+  rv = mPersist->SaveDocument(doc, aFile, aDataPath, aOutputContentType,
+                              aEncodingFlags, aWrapColumn);
+  if (NS_FAILED(rv)) {
+    mPersist = nullptr;
+  }
+  return rv;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::CancelSave() {
+  if (mPersist) {
+    return mPersist->CancelSave();
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::Cancel(nsresult aReason) {
+  if (mPersist) {
+    return mPersist->Cancel(aReason);
+  }
+  return NS_OK;
+}
+
+//*****************************************************************************
+// nsWebBrowser::nsIBaseWindow
+//*****************************************************************************
+
+NS_IMETHODIMP
+nsWebBrowser::InitWindow(nativeWindow aParentNativeWindow,
+                         nsIWidget* aParentWidget, int32_t aX, int32_t aY,
+                         int32_t aCX, int32_t aCY) {
+  // nsIBaseWindow::InitWindow and nsIBaseWindow::Create
+  // implementations have been merged into nsWebBrowser::Create
+  MOZ_DIAGNOSTIC_ASSERT(false);
+  return NS_ERROR_NULL_POINTER;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::Destroy() {
+  InternalDestroy();
+
+  return NS_OK;
+}
+
+double nsWebBrowser::GetWidgetCSSToDeviceScale() {
+  return mParentWidget ? mParentWidget->GetDefaultScale().scale : 1.0;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetDevicePixelsPerDesktopPixel(double* aScale) {
+  *aScale =
+      mParentWidget ? mParentWidget->GetDesktopToDeviceScale().scale : 1.0;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::SetPositionDesktopPix(int32_t aX, int32_t aY) {
+  // XXX jfkthame
+  // It's not clear to me whether this will be fully correct across
+  // potential multi-screen, mixed-DPI configurations for all platforms;
+  // we might need to add code paths that make it possible to pass the
+  // desktop-pix parameters all the way through to the native widget,
+  // to avoid the risk of device-pixel coords mapping to the wrong
+  // display on OS X with mixed retina/non-retina screens.
+  double scale = 1.0;
+  GetDevicePixelsPerDesktopPixel(&scale);
+  return SetPosition(NSToIntRound(aX * scale), NSToIntRound(aY * scale));
+}
+
+NS_IMETHODIMP
+nsWebBrowser::SetPosition(int32_t aX, int32_t aY) {
+  int32_t cx = 0;
+  int32_t cy = 0;
+
+  GetSize(&cx, &cy);
+
+  return SetPositionAndSize(aX, aY, cx, cy, 0);
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetPosition(int32_t* aX, int32_t* aY) {
+  return GetPositionAndSize(aX, aY, nullptr, nullptr);
+}
+
+NS_IMETHODIMP
+nsWebBrowser::SetSize(int32_t aCX, int32_t aCY, bool aRepaint) {
+  int32_t x = 0;
+  int32_t y = 0;
+
+  GetPosition(&x, &y);
+
+  return SetPositionAndSize(x, y, aCX, aCY,
+                            aRepaint ? nsIBaseWindow::eRepaint : 0);
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetSize(int32_t* aCX, int32_t* aCY) {
+  return GetPositionAndSize(nullptr, nullptr, aCX, aCY);
+}
+
+NS_IMETHODIMP
+nsWebBrowser::SetPositionAndSize(int32_t aX, int32_t aY, int32_t aCX,
+                                 int32_t aCY, uint32_t aFlags) {
+  int32_t doc_x = aX;
+  int32_t doc_y = aY;
+
+  // If there is an internal widget we need to make the docShell coordinates
+  // relative to the internal widget rather than the calling app's parent.
+  // We also need to resize our widget then.
+  if (mInternalWidget) {
+    doc_x = doc_y = 0;
+    mInternalWidget->Resize(aX, aY, aCX, aCY,
+                            !!(aFlags & nsIBaseWindow::eRepaint));
+  }
+  // Now reposition/ resize the doc
+  NS_ENSURE_SUCCESS(
+      mDocShell->SetPositionAndSize(doc_x, doc_y, aCX, aCY, aFlags),
+      NS_ERROR_FAILURE);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetPositionAndSize(int32_t* aX, int32_t* aY, int32_t* aCX,
+                                 int32_t* aCY) {
+  if (mInternalWidget) {
+    LayoutDeviceIntRect bounds = mInternalWidget->GetBounds();
+
+    if (aX) {
+      *aX = bounds.X();
+    }
+    if (aY) {
+      *aY = bounds.Y();
+    }
+    if (aCX) {
+      *aCX = bounds.Width();
+    }
+    if (aCY) {
+      *aCY = bounds.Height();
+    }
+    return NS_OK;
+  }
+
+  // Can directly return this as it is the
+  // same interface, thus same returns.
+  return mDocShell->GetPositionAndSize(aX, aY, aCX, aCY);
+}
+
+NS_IMETHODIMP
+nsWebBrowser::SetDimensions(DimensionRequest&& aRequest) {
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetDimensions(DimensionKind aDimensionKind, int32_t* aX,
+                            int32_t* aY, int32_t* aCX, int32_t* aCY) {
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::Repaint(bool aForce) {
+  NS_ENSURE_STATE(mDocShell);
+  // Can directly return this as it is the
+  // same interface, thus same returns.
+  return mDocShell->Repaint(aForce);
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetParentWidget(nsIWidget** aParentWidget) {
+  NS_ENSURE_ARG_POINTER(aParentWidget);
+
+  *aParentWidget = mParentWidget;
+
+  NS_IF_ADDREF(*aParentWidget);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::SetParentWidget(nsIWidget* aParentWidget) {
+  NS_ENSURE_STATE(!mDocShell);
+
+  mParentWidget = aParentWidget;
+  if (mParentWidget) {
+    mParentNativeWindow = mParentWidget->GetNativeData(NS_NATIVE_WIDGET);
+  } else {
+    mParentNativeWindow = nullptr;
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetParentNativeWindow(nativeWindow* aParentNativeWindow) {
+  NS_ENSURE_ARG_POINTER(aParentNativeWindow);
+
+  *aParentNativeWindow = mParentNativeWindow;
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::SetParentNativeWindow(nativeWindow aParentNativeWindow) {
+  NS_ENSURE_STATE(!mDocShell);
+
+  mParentNativeWindow = aParentNativeWindow;
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetNativeHandle(nsAString& aNativeHandle) {
+  // the nativeHandle should be accessed from nsIAppWindow
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetVisibility(bool* aVisibility) {
+  NS_ENSURE_ARG_POINTER(aVisibility);
+
+  if (mDocShell) {
+    NS_ENSURE_SUCCESS(mDocShell->GetVisibility(aVisibility), NS_ERROR_FAILURE);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::SetVisibility(bool aVisibility) {
+  if (mDocShell) {
+    NS_ENSURE_SUCCESS(mDocShell->SetVisibility(aVisibility), NS_ERROR_FAILURE);
+    if (mInternalWidget) {
+      mInternalWidget->Show(aVisibility);
+    }
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetEnabled(bool* aEnabled) {
+  if (mInternalWidget) {
+    *aEnabled = mInternalWidget->IsEnabled();
+    return NS_OK;
+  }
+
+  return NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::SetEnabled(bool aEnabled) {
+  if (mInternalWidget) {
+    mInternalWidget->Enable(aEnabled);
+    return NS_OK;
+  }
+  return NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetMainWidget(nsIWidget** aMainWidget) {
+  NS_ENSURE_ARG_POINTER(aMainWidget);
+
+  if (mInternalWidget) {
+    *aMainWidget = mInternalWidget;
+  } else {
+    *aMainWidget = mParentWidget;
+  }
+
+  NS_IF_ADDREF(*aMainWidget);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::GetTitle(nsAString& aTitle) {
+  NS_ENSURE_STATE(mDocShell);
+
+  NS_ENSURE_SUCCESS(mDocShell->GetTitle(aTitle), NS_ERROR_FAILURE);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebBrowser::SetTitle(const nsAString& aTitle) {
+  NS_ENSURE_STATE(mDocShell);
+
+  NS_ENSURE_SUCCESS(mDocShell->SetTitle(aTitle), NS_ERROR_FAILURE);
+
+  return NS_OK;
+}
+
+//*****************************************************************************
+// nsWebBrowser: Listener Helpers
+//*****************************************************************************
+
+void nsWebBrowser::SetDocShell(nsDocShell* aDocShell) {
+  // We need to keep the docshell alive while we perform the changes, but we
+  // don't need to call any methods on it.
+  nsCOMPtr<nsIDocShell> kungFuDeathGrip(mDocShell);
+  mozilla::Unused << kungFuDeathGrip;
+
+  if (aDocShell) {
+    MOZ_ASSERT(!mDocShell, "Should not overwrite an existing value!");
+
+    mDocShell = aDocShell;
+
+    // By default, do not allow DNS prefetch, so we don't break our frozen
+    // API.  Embeddors who decide to enable it should do so manually.
+    mDocShell->SetAllowDNSPrefetch(false);
+  } else {
+    if (mDocShellTreeOwner) {
+      mDocShellTreeOwner->RemoveFromWatcher();  // evil twin of Add in Create()
+    }
+    if (mDocShell) {
+      mDocShell->Destroy();
+    }
+    if (!mWillChangeProcess && mDocShell) {
+      mDocShell->GetBrowsingContext()->Detach(/* aFromIPC */ true);
+    }
+
+    mDocShell = nullptr;
+  }
+}
+
+void nsWebBrowser::EnsureDocShellTreeOwner() {
+  if (mDocShellTreeOwner) {
+    return;
+  }
+
+  mDocShellTreeOwner = new nsDocShellTreeOwner();
+  mDocShellTreeOwner->WebBrowser(this);
+}
+
+void nsWebBrowser::WindowActivated() {
+#if defined(DEBUG_smaug)
+  RefPtr<dom::Document> document = mDocShell->GetDocument();
+  nsAutoString documentURI;
+  document->GetDocumentURI(documentURI);
+  printf("nsWebBrowser::NS_ACTIVATE %p %s\n", (void*)this,
+         NS_ConvertUTF16toUTF8(documentURI).get());
+#endif
+  FocusActivate(nsFocusManager::GenerateFocusActionId());
+}
+
+void nsWebBrowser::WindowDeactivated() {
+#if defined(DEBUG_smaug)
+  RefPtr<dom::Document> document = mDocShell->GetDocument();
+  nsAutoString documentURI;
+  document->GetDocumentURI(documentURI);
+  printf("nsWebBrowser::NS_DEACTIVATE %p %s\n", (void*)this,
+         NS_ConvertUTF16toUTF8(documentURI).get());
+#endif
+  FocusDeactivate(nsFocusManager::GenerateFocusActionId());
+}
+
+bool nsWebBrowser::PaintWindow(nsIWidget* aWidget,
+                               LayoutDeviceIntRegion aRegion) {
+  WindowRenderer* renderer = aWidget->GetWindowRenderer();
+  NS_ASSERTION(renderer, "Must be in paint event");
+  if (FallbackRenderer* fallback = renderer->AsFallback()) {
+    if (fallback->BeginTransaction()) {
+      fallback->EndTransactionWithColor(aRegion.GetBounds().ToUnknownRect(),
+                                        ToDeviceColor(mBackgroundColor));
+    }
+    return true;
+  }
+  return false;
+}
+
+void nsWebBrowser::FocusActivate(uint64_t aActionId) {
+  if (RefPtr<nsFocusManager> fm = nsFocusManager::GetFocusManager()) {
+    if (nsCOMPtr<nsPIDOMWindowOuter> window = GetWindow()) {
+      fm->WindowRaised(window, aActionId);
+    }
+  }
+}
+
+void nsWebBrowser::FocusDeactivate(uint64_t aActionId) {
+  if (RefPtr<nsFocusManager> fm = nsFocusManager::GetFocusManager()) {
+    if (nsCOMPtr<nsPIDOMWindowOuter> window = GetWindow()) {
+      fm->WindowLowered(window, aActionId);
+    }
+  }
+}
+
+void nsWebBrowser::SetWillChangeProcess() {
+  mWillChangeProcess = true;
+  if (mDocShell) {
+    nsDocShell::Cast(mDocShell)->SetWillChangeProcess();
+  }
+}
+
+void nsWebBrowser::WidgetListenerDelegate::WindowActivated() {
+  RefPtr<nsWebBrowser> holder = mWebBrowser;
+  holder->WindowActivated();
+}
+
+void nsWebBrowser::WidgetListenerDelegate::WindowDeactivated() {
+  RefPtr<nsWebBrowser> holder = mWebBrowser;
+  holder->WindowDeactivated();
+}
+
+bool nsWebBrowser::WidgetListenerDelegate::PaintWindow(
+    nsIWidget* aWidget, mozilla::LayoutDeviceIntRegion aRegion) {
+  RefPtr<nsWebBrowser> holder = mWebBrowser;
+  return holder->PaintWindow(aWidget, aRegion);
+}
diff --git a/toolkit/components/browser/nsWebBrowser.h b/toolkit/components/browser/nsWebBrowser.h
new file mode 100644
index 0000000000..f2cbaeb938
--- /dev/null
+++ b/toolkit/components/browser/nsWebBrowser.h
@@ -0,0 +1,164 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#ifndef nsWebBrowser_h__
+#define nsWebBrowser_h__
+
+// Local Includes
+#include "nsDocShellTreeOwner.h"
+
+// Core Includes
+#include "nsCOMPtr.h"
+#include "nsCycleCollectionParticipant.h"
+
+// Interfaces needed
+#include "nsIBaseWindow.h"
+#include "nsIDocShell.h"
+#include "nsIDocShellTreeItem.h"
+#include "nsIInterfaceRequestor.h"
+#include "nsIInterfaceRequestorUtils.h"
+#include "nsIWidget.h"
+#include "nsIWebProgress.h"
+#include "nsIWebBrowser.h"
+#include "nsIWebNavigation.h"
+#include "nsIWebBrowserPersist.h"
+#include "nsIWindowWatcher.h"
+#include "nsIPrintSettings.h"
+#include "nsIWidgetListener.h"
+
+#include "mozilla/BasePrincipal.h"
+#include "nsTArray.h"
+#include "nsIWeakReferenceUtils.h"
+
+class nsWebBrowserInitInfo {
+ public:
+  // nsIBaseWindow Stuff
+  int32_t x;
+  int32_t y;
+  int32_t cx;
+  int32_t cy;
+  bool visible;
+  nsString name;
+};
+
+//  {cda5863a-aa9c-411e-be49-ea0d525ab4b5} -
+#define NS_WEBBROWSER_CID                            \
+  {                                                  \
+    0xcda5863a, 0xaa9c, 0x411e, {                    \
+      0xbe, 0x49, 0xea, 0x0d, 0x52, 0x5a, 0xb4, 0xb5 \
+    }                                                \
+  }
+
+class mozIDOMWindowProxy;
+class nsDocShell;
+
+namespace mozilla {
+namespace dom {
+class WindowGlobalChild;
+}  // namespace dom
+}  // namespace mozilla
+
+class nsWebBrowser final : public nsIWebBrowser,
+                           public nsIWebNavigation,
+                           public nsIDocShellTreeItem,
+                           public nsIBaseWindow,
+                           public nsIInterfaceRequestor,
+                           public nsIWebBrowserPersist,
+                           public nsIWebProgressListener,
+                           public nsSupportsWeakReference {
+  friend class nsDocShellTreeOwner;
+
+ public:
+  // The implementation of non-refcounted nsIWidgetListener, which would hold a
+  // strong reference on stack before calling nsWebBrowser's
+  // MOZ_CAN_RUN_SCRIPT methods.
+  class WidgetListenerDelegate : public nsIWidgetListener {
+   public:
+    explicit WidgetListenerDelegate(nsWebBrowser* aWebBrowser)
+        : mWebBrowser(aWebBrowser) {}
+    MOZ_CAN_RUN_SCRIPT_BOUNDARY virtual void WindowActivated() override;
+    MOZ_CAN_RUN_SCRIPT_BOUNDARY virtual void WindowDeactivated() override;
+    MOZ_CAN_RUN_SCRIPT_BOUNDARY virtual bool PaintWindow(
+        nsIWidget* aWidget, mozilla::LayoutDeviceIntRegion aRegion) override;
+
+   private:
+    // The lifetime of WidgetListenerDelegate is bound to nsWebBrowser so we
+    // just use raw pointer here.
+    nsWebBrowser* mWebBrowser;
+  };
+
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(nsWebBrowser, nsIWebBrowser)
+
+  NS_DECL_NSIBASEWINDOW
+  NS_DECL_NSIDOCSHELLTREEITEM
+  NS_DECL_NSIINTERFACEREQUESTOR
+  NS_DECL_NSIWEBBROWSER
+  NS_DECL_NSIWEBNAVIGATION
+  NS_DECL_NSIWEBBROWSERPERSIST
+  NS_DECL_NSICANCELABLE
+  NS_DECL_NSIWEBPROGRESSLISTENER
+
+  void SetAllowDNSPrefetch(bool aAllowPrefetch);
+  // TODO: Convert FocusDeactivate() to MOZ_CAN_RUN_SCRIPT
+  MOZ_CAN_RUN_SCRIPT_BOUNDARY void FocusActivate(uint64_t aActionId);
+  // TODO: Convert FocusDeactivate() to MOZ_CAN_RUN_SCRIPT
+  MOZ_CAN_RUN_SCRIPT_BOUNDARY void FocusDeactivate(uint64_t aActionId);
+  void SetWillChangeProcess();
+
+  static already_AddRefed<nsWebBrowser> Create(
+      nsIWebBrowserChrome* aContainerWindow, nsIWidget* aParentWidget,
+      mozilla::dom::BrowsingContext* aBrowsingContext,
+      mozilla::dom::WindowGlobalChild* aInitialWindowChild);
+
+ protected:
+  virtual ~nsWebBrowser();
+  void InternalDestroy();
+
+  void SetDocShell(nsDocShell* aDocShell);
+  void EnsureDocShellTreeOwner();
+
+  nsIWidget* EnsureWidget();
+
+  // nsIWidgetListener methods for WidgetListenerDelegate.
+  MOZ_CAN_RUN_SCRIPT void WindowActivated();
+  MOZ_CAN_RUN_SCRIPT void WindowDeactivated();
+  MOZ_CAN_RUN_SCRIPT bool PaintWindow(nsIWidget* aWidget,
+                                      mozilla::LayoutDeviceIntRegion aRegion);
+
+  explicit nsWebBrowser(int aItemType);
+
+ protected:
+  RefPtr<nsDocShellTreeOwner> mDocShellTreeOwner;
+  RefPtr<nsDocShell> mDocShell;
+  mozilla::OriginAttributes mOriginAttributes;
+
+  nsCOMPtr<nsIWidget> mInternalWidget;
+  nsCOMPtr<nsIWindowWatcher> mWWatch;
+  const uint32_t mContentType;
+  bool mShouldEnableHistory;
+  bool mWillChangeProcess;
+  nativeWindow mParentNativeWindow;
+  nsIWebProgressListener* mProgressListener;
+
+  nsCOMPtr<nsIPrintSettings> mPrintSettings;
+
+  WidgetListenerDelegate mWidgetListenerDelegate;
+
+  // cached background color
+  nscolor mBackgroundColor;
+
+  // persistence object
+  nsCOMPtr<nsIWebBrowserPersist> mPersist;
+  uint32_t mPersistCurrentState;
+  nsresult mPersistResult;
+  uint32_t mPersistFlags;
+
+  // Weak Reference interfaces...
+  nsIWidget* mParentWidget;
+};
+
+#endif /* nsWebBrowser_h__ */
diff --git a/toolkit/components/browser/nsWebBrowserContentPolicy.cpp b/toolkit/components/browser/nsWebBrowserContentPolicy.cpp
new file mode 100644
index 0000000000..fcb8af485c
--- /dev/null
+++ b/toolkit/components/browser/nsWebBrowserContentPolicy.cpp
@@ -0,0 +1,87 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#include "nsWebBrowserContentPolicy.h"
+#include "nsIDocShell.h"
+#include "nsCOMPtr.h"
+#include "nsContentPolicyUtils.h"
+#include "nsNetUtil.h"
+
+nsWebBrowserContentPolicy::nsWebBrowserContentPolicy() = default;
+
+nsWebBrowserContentPolicy::~nsWebBrowserContentPolicy() = default;
+
+NS_IMPL_ISUPPORTS(nsWebBrowserContentPolicy, nsIContentPolicy)
+
+NS_IMETHODIMP
+nsWebBrowserContentPolicy::ShouldLoad(nsIURI* aContentLocation,
+                                      nsILoadInfo* aLoadInfo,
+                                      const nsACString& aMimeGuess,
+                                      int16_t* aShouldLoad) {
+  MOZ_ASSERT(aShouldLoad, "Null out param");
+
+  ExtContentPolicyType contentType = aLoadInfo->GetExternalContentPolicyType();
+
+  *aShouldLoad = nsIContentPolicy::ACCEPT;
+
+  nsCOMPtr<nsISupports> context = aLoadInfo->GetLoadingContext();
+  nsIDocShell* shell = NS_CP_GetDocShellFromContext(context);
+  /* We're going to dereference shell, so make sure it isn't null */
+  if (!shell) {
+    return NS_OK;
+  }
+
+  nsresult rv;
+  bool allowed = true;
+
+  switch (contentType) {
+    case ExtContentPolicy::TYPE_SUBDOCUMENT:
+      rv = shell->GetAllowSubframes(&allowed);
+      break;
+    case ExtContentPolicy::TYPE_IMAGE:
+    case ExtContentPolicy::TYPE_IMAGESET:
+      rv = shell->GetAllowImages(&allowed);
+      break;
+    default:
+      return NS_OK;
+  }
+
+  if (NS_SUCCEEDED(rv) && !allowed) {
+    NS_SetRequestBlockingReason(
+        aLoadInfo, nsILoadInfo::BLOCKING_REASON_CONTENT_POLICY_WEB_BROWSER);
+    *aShouldLoad = nsIContentPolicy::REJECT_TYPE;
+  }
+  return rv;
+}
+
+NS_IMETHODIMP
+nsWebBrowserContentPolicy::ShouldProcess(nsIURI* aContentLocation,
+                                         nsILoadInfo* aLoadInfo,
+                                         const nsACString& aMimeGuess,
+                                         int16_t* aShouldProcess) {
+  MOZ_ASSERT(aShouldProcess, "Null out param");
+
+  ExtContentPolicyType contentType = aLoadInfo->GetExternalContentPolicyType();
+
+  *aShouldProcess = nsIContentPolicy::ACCEPT;
+
+  // Object tags will always open channels with TYPE_OBJECT, but may end up
+  // loading with TYPE_IMAGE or TYPE_DOCUMENT as their final type, so we block
+  // actual-plugins at the process stage
+  if (contentType != ExtContentPolicy::TYPE_OBJECT) {
+    return NS_OK;
+  }
+
+  nsCOMPtr<nsISupports> context = aLoadInfo->GetLoadingContext();
+  nsIDocShell* shell = NS_CP_GetDocShellFromContext(context);
+  if (shell && (!shell->PluginsAllowedInCurrentDoc())) {
+    NS_SetRequestBlockingReason(
+        aLoadInfo, nsILoadInfo::BLOCKING_REASON_CONTENT_POLICY_WEB_BROWSER);
+    *aShouldProcess = nsIContentPolicy::REJECT_TYPE;
+  }
+
+  return NS_OK;
+}
diff --git a/toolkit/components/browser/nsWebBrowserContentPolicy.h b/toolkit/components/browser/nsWebBrowserContentPolicy.h
new file mode 100644
index 0000000000..7b778baf5a
--- /dev/null
+++ b/toolkit/components/browser/nsWebBrowserContentPolicy.h
@@ -0,0 +1,29 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#include "nsIContentPolicy.h"
+
+/* f66bc334-1dd1-11b2-bab2-90e04fe15c19 */
+#define NS_WEBBROWSERCONTENTPOLICY_CID               \
+  {                                                  \
+    0xf66bc334, 0x1dd1, 0x11b2, {                    \
+      0xba, 0xb2, 0x90, 0xe0, 0x4f, 0xe1, 0x5c, 0x19 \
+    }                                                \
+  }
+
+#define NS_WEBBROWSERCONTENTPOLICY_CONTRACTID \
+  "@mozilla.org/embedding/browser/content-policy;1"
+
+class nsWebBrowserContentPolicy : public nsIContentPolicy {
+ protected:
+  virtual ~nsWebBrowserContentPolicy();
+
+ public:
+  nsWebBrowserContentPolicy();
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSICONTENTPOLICY
+};