From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Fri, 19 Apr 2024 02:47:55 +0200
Subject: Adding upstream version 124.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 docshell/base/nsDocShell.h | 1366 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 1366 insertions(+)
 create mode 100644 docshell/base/nsDocShell.h

(limited to 'docshell/base/nsDocShell.h')

diff --git a/docshell/base/nsDocShell.h b/docshell/base/nsDocShell.h
new file mode 100644
index 0000000000..9f2d9a17dc
--- /dev/null
+++ b/docshell/base/nsDocShell.h
@@ -0,0 +1,1366 @@
+/* -*- 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 nsDocShell_h__
+#define nsDocShell_h__
+
+#include "Units.h"
+#include "mozilla/Encoding.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/NotNull.h"
+#include "mozilla/ScrollbarPreferences.h"
+#include "mozilla/UniquePtr.h"
+#include "mozilla/WeakPtr.h"
+#include "mozilla/dom/BrowsingContext.h"
+#include "mozilla/dom/WindowProxyHolder.h"
+#include "nsCOMPtr.h"
+#include "nsCharsetSource.h"
+#include "nsDocLoader.h"
+#include "nsIAuthPromptProvider.h"
+#include "nsIBaseWindow.h"
+#include "nsIDocShell.h"
+#include "nsIDocShellTreeItem.h"
+#include "nsIInterfaceRequestor.h"
+#include "nsILoadContext.h"
+#include "nsINetworkInterceptController.h"
+#include "nsIRefreshURI.h"
+#include "nsIWebNavigation.h"
+#include "nsIWebPageDescriptor.h"
+#include "nsIWebProgressListener.h"
+#include "nsPoint.h"  // mCurrent/mDefaultScrollbarPreferences
+#include "nsRect.h"
+#include "nsString.h"
+#include "nsThreadUtils.h"
+#include "prtime.h"
+
+// Interfaces Needed
+
+namespace mozilla {
+class Encoding;
+class HTMLEditor;
+class ObservedDocShell;
+enum class TaskCategory;
+namespace dom {
+class ClientInfo;
+class ClientSource;
+class EventTarget;
+class SessionHistoryInfo;
+struct LoadingSessionHistoryInfo;
+struct Wireframe;
+}  // namespace dom
+namespace net {
+class LoadInfo;
+class DocumentLoadListener;
+}  // namespace net
+}  // namespace mozilla
+
+class nsIController;
+class nsIDocShellTreeOwner;
+class nsIDocumentViewer;
+class nsIHttpChannel;
+class nsIMutableArray;
+class nsIPrompt;
+class nsIScrollableFrame;
+class nsIStringBundle;
+class nsIURIFixup;
+class nsIURIFixupInfo;
+class nsIURILoader;
+class nsIWebBrowserFind;
+class nsIWidget;
+class nsIReferrerInfo;
+
+class nsCommandManager;
+class nsDocShellEditorData;
+class nsDOMNavigationTiming;
+class nsDSURIContentListener;
+class nsGlobalWindowOuter;
+
+class FramingChecker;
+class OnLinkClickEvent;
+
+/* internally used ViewMode types */
+enum ViewMode { viewNormal = 0x0, viewSource = 0x1 };
+
+enum eCharsetReloadState {
+  eCharsetReloadInit,
+  eCharsetReloadRequested,
+  eCharsetReloadStopOrigional
+};
+
+class nsDocShell final : public nsDocLoader,
+                         public nsIDocShell,
+                         public nsIWebNavigation,
+                         public nsIBaseWindow,
+                         public nsIRefreshURI,
+                         public nsIWebProgressListener,
+                         public nsIWebPageDescriptor,
+                         public nsIAuthPromptProvider,
+                         public nsILoadContext,
+                         public nsINetworkInterceptController,
+                         public mozilla::SupportsWeakPtr {
+ public:
+  enum InternalLoad : uint32_t {
+    INTERNAL_LOAD_FLAGS_NONE = 0x0,
+    INTERNAL_LOAD_FLAGS_INHERIT_PRINCIPAL = 0x1,
+    INTERNAL_LOAD_FLAGS_DONT_SEND_REFERRER = 0x2,
+    INTERNAL_LOAD_FLAGS_ALLOW_THIRD_PARTY_FIXUP = 0x4,
+
+    // This flag marks the first load in this object
+    // @see nsIWebNavigation::LOAD_FLAGS_FIRST_LOAD
+    INTERNAL_LOAD_FLAGS_FIRST_LOAD = 0x8,
+
+    // The set of flags that should not be set before calling into
+    // nsDocShell::LoadURI and other nsDocShell loading functions.
+    INTERNAL_LOAD_FLAGS_LOADURI_SETUP_FLAGS = 0xf,
+
+    INTERNAL_LOAD_FLAGS_BYPASS_CLASSIFIER = 0x10,
+    INTERNAL_LOAD_FLAGS_FORCE_ALLOW_COOKIES = 0x20,
+
+    // Whether the load should be treated as srcdoc load, rather than a URI one.
+    INTERNAL_LOAD_FLAGS_IS_SRCDOC = 0x40,
+
+    // Whether this is the load of a frame's original src attribute
+    INTERNAL_LOAD_FLAGS_ORIGINAL_FRAME_SRC = 0x80,
+
+    INTERNAL_LOAD_FLAGS_NO_OPENER = 0x100,
+
+    // Whether a top-level data URI navigation is allowed for that load
+    INTERNAL_LOAD_FLAGS_FORCE_ALLOW_DATA_URI = 0x200,
+
+    // Whether the load should go through LoadURIDelegate.
+    INTERNAL_LOAD_FLAGS_BYPASS_LOAD_URI_DELEGATE = 0x2000,
+  };
+
+  // Event type dispatched by RestorePresentation
+  class RestorePresentationEvent : public mozilla::Runnable {
+   public:
+    NS_DECL_NSIRUNNABLE
+    explicit RestorePresentationEvent(nsDocShell* aDs)
+        : mozilla::Runnable("nsDocShell::RestorePresentationEvent"),
+          mDocShell(aDs) {}
+    void Revoke() { mDocShell = nullptr; }
+
+   private:
+    RefPtr<nsDocShell> mDocShell;
+  };
+
+  class InterfaceRequestorProxy : public nsIInterfaceRequestor {
+   public:
+    explicit InterfaceRequestorProxy(nsIInterfaceRequestor* aRequestor);
+    NS_DECL_THREADSAFE_ISUPPORTS
+    NS_DECL_NSIINTERFACEREQUESTOR
+
+   private:
+    virtual ~InterfaceRequestorProxy();
+    InterfaceRequestorProxy() = default;
+    nsWeakPtr mWeakPtr;
+  };
+
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(nsDocShell, nsDocLoader)
+  NS_DECL_NSIDOCSHELL
+  NS_DECL_NSIDOCSHELLTREEITEM
+  NS_DECL_NSIWEBNAVIGATION
+  NS_DECL_NSIBASEWINDOW
+  NS_DECL_NSIINTERFACEREQUESTOR
+  NS_DECL_NSIWEBPROGRESSLISTENER
+  NS_DECL_NSIREFRESHURI
+  NS_DECL_NSIWEBPAGEDESCRIPTOR
+  NS_DECL_NSIAUTHPROMPTPROVIDER
+  NS_DECL_NSINETWORKINTERCEPTCONTROLLER
+
+  // Create a new nsDocShell object.
+  static already_AddRefed<nsDocShell> Create(
+      mozilla::dom::BrowsingContext* aBrowsingContext,
+      uint64_t aContentWindowID = 0);
+
+  bool Initialize();
+
+  NS_IMETHOD Stop() override {
+    // Need this here because otherwise nsIWebNavigation::Stop
+    // overrides the docloader's Stop()
+    return nsDocLoader::Stop();
+  }
+
+  mozilla::ScrollbarPreference ScrollbarPreference() const {
+    return mScrollbarPref;
+  }
+  void SetScrollbarPreference(mozilla::ScrollbarPreference);
+
+  /*
+   * The size, in CSS pixels, of the margins for the <body> of an HTML document
+   * in this docshell; used to implement the marginwidth attribute on HTML
+   * <frame>/<iframe> elements.  A value smaller than zero indicates that the
+   * attribute was not set.
+   */
+  const mozilla::CSSIntSize& GetFrameMargins() const { return mFrameMargins; }
+
+  bool UpdateFrameMargins(const mozilla::CSSIntSize& aMargins) {
+    if (mFrameMargins == aMargins) {
+      return false;
+    }
+    mFrameMargins = aMargins;
+    return true;
+  }
+
+  /**
+   * Process a click on a link.
+   *
+   * @param aContent the content object used for triggering the link.
+   * @param aURI a URI object that defines the destination for the link
+   * @param aTargetSpec indicates where the link is targeted (may be an empty
+   *        string)
+   * @param aFileName non-null when the link should be downloaded as the given
+   * file
+   * @param aPostDataStream the POST data to send
+   * @param aHeadersDataStream ??? (only used for plugins)
+   * @param aIsTrusted false if the triggerer is an untrusted DOM event.
+   * @param aTriggeringPrincipal, if not passed explicitly we fall back to
+   *        the document's principal.
+   * @param aCsp, the CSP to be used for the load, that is the CSP of the
+   *        entity responsible for causing the load to occur. Most likely
+   *        this is the CSP of the document that started the load. In case
+   *        aCsp was not passed explicitly we fall back to using
+   *        aContent's document's CSP if that document holds any.
+   */
+  nsresult OnLinkClick(nsIContent* aContent, nsIURI* aURI,
+                       const nsAString& aTargetSpec, const nsAString& aFileName,
+                       nsIInputStream* aPostDataStream,
+                       nsIInputStream* aHeadersDataStream,
+                       bool aIsUserTriggered, bool aIsTrusted,
+                       nsIPrincipal* aTriggeringPrincipal,
+                       nsIContentSecurityPolicy* aCsp);
+  /**
+   * Process a click on a link.
+   *
+   * Works the same as OnLinkClick() except it happens immediately rather than
+   * through an event.
+   *
+   * @param aContent the content object used for triggering the link.
+   * @param aDocShellLoadState the extended load info for this load.
+   * @param aNoOpenerImplied if the link implies "noopener"
+   * @param aTriggeringPrincipal, if not passed explicitly we fall back to
+   *        the document's principal.
+   */
+  nsresult OnLinkClickSync(nsIContent* aContent,
+                           nsDocShellLoadState* aLoadState,
+                           bool aNoOpenerImplied,
+                           nsIPrincipal* aTriggeringPrincipal);
+
+  /**
+   * Process a mouse-over a link.
+   *
+   * @param aContent the linked content.
+   * @param aURI an URI object that defines the destination for the link
+   * @param aTargetSpec indicates where the link is targeted (it may be an empty
+   *        string)
+   */
+  nsresult OnOverLink(nsIContent* aContent, nsIURI* aURI,
+                      const nsAString& aTargetSpec);
+  /**
+   * Process the mouse leaving a link.
+   */
+  nsresult OnLeaveLink();
+
+  // Don't use NS_DECL_NSILOADCONTEXT because some of nsILoadContext's methods
+  // are shared with nsIDocShell and can't be declared twice.
+  NS_IMETHOD GetAssociatedWindow(mozIDOMWindowProxy**) override;
+  NS_IMETHOD GetTopWindow(mozIDOMWindowProxy**) override;
+  NS_IMETHOD GetTopFrameElement(mozilla::dom::Element**) override;
+  NS_IMETHOD GetIsContent(bool*) override;
+  NS_IMETHOD GetUsePrivateBrowsing(bool*) override;
+  NS_IMETHOD SetUsePrivateBrowsing(bool) override;
+  NS_IMETHOD SetPrivateBrowsing(bool) override;
+  NS_IMETHOD GetUseRemoteTabs(bool*) override;
+  NS_IMETHOD SetRemoteTabs(bool) override;
+  NS_IMETHOD GetUseRemoteSubframes(bool*) override;
+  NS_IMETHOD SetRemoteSubframes(bool) override;
+  NS_IMETHOD GetScriptableOriginAttributes(
+      JSContext*, JS::MutableHandle<JS::Value>) override;
+  NS_IMETHOD_(void)
+  GetOriginAttributes(mozilla::OriginAttributes& aAttrs) override;
+
+  // Restores a cached presentation from history (mLSHE).
+  // This method swaps out the content viewer and simulates loads for
+  // subframes. It then simulates the completion of the toplevel load.
+  nsresult RestoreFromHistory();
+
+  /**
+   * Parses the passed in header string and sets up a refreshURI if a "refresh"
+   * header is found. If docshell is busy loading a page currently, the request
+   * will be queued and executed when the current page finishes loading.
+   *
+   * @param aDocument    document to which the refresh header applies.
+   * @param aHeader      The meta refresh header string.
+   */
+  void SetupRefreshURIFromHeader(mozilla::dom::Document* aDocument,
+                                 const nsAString& aHeader);
+
+  // Perform a URI load from a refresh timer. This is just like the
+  // ForceRefreshURI method on nsIRefreshURI, but makes sure to take
+  // the timer involved out of mRefreshURIList if it's there.
+  // aTimer must not be null.
+  nsresult ForceRefreshURIFromTimer(nsIURI* aURI, nsIPrincipal* aPrincipal,
+                                    uint32_t aDelay, nsITimer* aTimer);
+
+  // We need dummy OnLocationChange in some cases to update the UI without
+  // updating security info.
+  void FireDummyOnLocationChange() {
+    FireOnLocationChange(this, nullptr, mCurrentURI,
+                         LOCATION_CHANGE_SAME_DOCUMENT);
+  }
+
+  nsresult HistoryEntryRemoved(int32_t aIndex);
+
+  // Notify Scroll observers when an async panning/zooming transform
+  // has started being applied
+  MOZ_CAN_RUN_SCRIPT_BOUNDARY
+  void NotifyAsyncPanZoomStarted();
+
+  // Notify Scroll observers when an async panning/zooming transform
+  // is no longer applied
+  MOZ_CAN_RUN_SCRIPT_BOUNDARY
+  void NotifyAsyncPanZoomStopped();
+
+  void SetInFrameSwap(bool aInSwap) { mInFrameSwap = aInSwap; }
+  bool InFrameSwap();
+
+  bool GetForcedAutodetection() { return mForcedAutodetection; }
+
+  void ResetForcedAutodetection() { mForcedAutodetection = false; }
+
+  mozilla::HTMLEditor* GetHTMLEditorInternal();
+  nsresult SetHTMLEditorInternal(mozilla::HTMLEditor* aHTMLEditor);
+
+  // Handle page navigation due to charset changes
+  nsresult CharsetChangeReloadDocument(
+      mozilla::NotNull<const mozilla::Encoding*> aEncoding, int32_t aSource);
+  nsresult CharsetChangeStopDocumentLoad();
+
+  nsDOMNavigationTiming* GetNavigationTiming() const;
+
+  nsresult SetOriginAttributes(const mozilla::OriginAttributes& aAttrs);
+
+  const mozilla::OriginAttributes& GetOriginAttributes() {
+    return mBrowsingContext->OriginAttributesRef();
+  }
+
+  // Determine whether this docshell corresponds to the given history entry,
+  // via having a pointer to it in mOSHE or mLSHE.
+  bool HasHistoryEntry(nsISHEntry* aEntry) const {
+    return aEntry && (aEntry == mOSHE || aEntry == mLSHE);
+  }
+
+  // Update any pointers (mOSHE or mLSHE) to aOldEntry to point to aNewEntry
+  void SwapHistoryEntries(nsISHEntry* aOldEntry, nsISHEntry* aNewEntry);
+
+  bool GetCreatedDynamically() const {
+    return mBrowsingContext && mBrowsingContext->CreatedDynamically();
+  }
+
+  mozilla::gfx::Matrix5x4* GetColorMatrix() { return mColorMatrix.get(); }
+
+  static bool SandboxFlagsImplyCookies(const uint32_t& aSandboxFlags);
+
+  // Tell the favicon service that aNewURI has the same favicon as aOldURI.
+  static void CopyFavicon(nsIURI* aOldURI, nsIURI* aNewURI,
+                          bool aInPrivateBrowsing);
+
+  static nsDocShell* Cast(nsIDocShell* aDocShell) {
+    return static_cast<nsDocShell*>(aDocShell);
+  }
+
+  static bool CanLoadInParentProcess(nsIURI* aURI);
+
+  // Returns true if the current load is a force reload (started by holding
+  // shift while triggering reload)
+  bool IsForceReloading();
+
+  mozilla::dom::WindowProxyHolder GetWindowProxy() {
+    EnsureScriptEnvironment();
+    return mozilla::dom::WindowProxyHolder(mBrowsingContext);
+  }
+
+  /**
+   * Loads the given URI. See comments on nsDocShellLoadState members for more
+   * information on information used.
+   * `aCacheKey` gets passed to DoURILoad call.
+   */
+  MOZ_CAN_RUN_SCRIPT_BOUNDARY
+  nsresult InternalLoad(
+      nsDocShellLoadState* aLoadState,
+      mozilla::Maybe<uint32_t> aCacheKey = mozilla::Nothing());
+
+  void MaybeRestoreWindowName();
+
+  void StoreWindowNameToSHEntries();
+
+  void SetWillChangeProcess() { mWillChangeProcess = true; }
+  bool WillChangeProcess() { return mWillChangeProcess; }
+
+  // Create a content viewer within this nsDocShell for the given
+  // `WindowGlobalChild` actor.
+  nsresult CreateDocumentViewerForActor(
+      mozilla::dom::WindowGlobalChild* aWindowActor);
+
+  // Creates a real network channel (not a DocumentChannel) using the specified
+  // parameters.
+  // Used by nsDocShell when not using DocumentChannel, by DocumentLoadListener
+  // (parent-process DocumentChannel), and by DocumentChannelChild/ContentChild
+  // to transfer the resulting channel into the final process.
+  static nsresult CreateRealChannelForDocument(
+      nsIChannel** aChannel, nsIURI* aURI, nsILoadInfo* aLoadInfo,
+      nsIInterfaceRequestor* aCallbacks, nsLoadFlags aLoadFlags,
+      const nsAString& aSrcdoc, nsIURI* aBaseURI);
+
+  // Creates a real (not DocumentChannel) channel, and configures it using the
+  // supplied nsDocShellLoadState.
+  // Configuration options here are ones that should be applied to only the
+  // real channel, especially ones that need to QI to channel subclasses.
+  static bool CreateAndConfigureRealChannelForLoadState(
+      mozilla::dom::BrowsingContext* aBrowsingContext,
+      nsDocShellLoadState* aLoadState, mozilla::net::LoadInfo* aLoadInfo,
+      nsIInterfaceRequestor* aCallbacks, nsDocShell* aDocShell,
+      const mozilla::OriginAttributes& aOriginAttributes,
+      nsLoadFlags aLoadFlags, uint32_t aCacheKey, nsresult& rv,
+      nsIChannel** aChannel);
+
+  // This is used to deal with errors resulting from a failed page load.
+  // Errors are handled as follows:
+  //   1. Check to see if it's a file not found error or bad content
+  //      encoding error.
+  //   2. Send the URI to a keyword server (if enabled)
+  //   3. If the error was DNS failure, then add www and .com to the URI
+  //      (if appropriate).
+  //   4. If the www .com additions don't work, try those with an HTTPS scheme
+  //      (if appropriate).
+  static already_AddRefed<nsIURI> AttemptURIFixup(
+      nsIChannel* aChannel, nsresult aStatus,
+      const mozilla::Maybe<nsCString>& aOriginalURIString, uint32_t aLoadType,
+      bool aIsTopFrame, bool aAllowKeywordFixup, bool aUsePrivateBrowsing,
+      bool aNotifyKeywordSearchLoading = false,
+      nsIInputStream** aNewPostData = nullptr,
+      bool* outWasSchemelessInput = nullptr);
+
+  static already_AddRefed<nsIURI> MaybeFixBadCertDomainErrorURI(
+      nsIChannel* aChannel, nsIURI* aUrl);
+
+  // Takes aStatus and filters out results that should not display
+  // an error page.
+  // If this returns a failed result, then we should display an error
+  // page with that result.
+  // aSkippedUnknownProtocolNavigation will be set to true if we chose
+  // to skip displaying an error page for an NS_ERROR_UNKNOWN_PROTOCOL
+  // navigation.
+  static nsresult FilterStatusForErrorPage(
+      nsresult aStatus, nsIChannel* aChannel, uint32_t aLoadType,
+      bool aIsTopFrame, bool aUseErrorPages, bool aIsInitialDocument,
+      bool* aSkippedUnknownProtocolNavigation = nullptr);
+
+  // Notify consumers of a search being loaded through the observer service:
+  static void MaybeNotifyKeywordSearchLoading(const nsString& aProvider,
+                                              const nsString& aKeyword);
+
+  nsDocShell* GetInProcessChildAt(int32_t aIndex);
+
+  static bool ShouldAddURIVisit(nsIChannel* aChannel);
+
+  /**
+   * Helper function that finds the last URI and its transition flags for a
+   * channel.
+   *
+   * This method first checks the channel's property bag to see if previous
+   * info has been saved. If not, it gives back the referrer of the channel.
+   *
+   * @param aChannel
+   *        The channel we are transitioning to
+   * @param aURI
+   *        Output parameter with the previous URI, not addref'd
+   * @param aChannelRedirectFlags
+   *        If a redirect, output parameter with the previous redirect flags
+   *        from nsIChannelEventSink
+   */
+  static void ExtractLastVisit(nsIChannel* aChannel, nsIURI** aURI,
+                               uint32_t* aChannelRedirectFlags);
+
+  bool HasDocumentViewer() const { return !!mDocumentViewer; }
+
+  static uint32_t ComputeURILoaderFlags(
+      mozilla::dom::BrowsingContext* aBrowsingContext, uint32_t aLoadType);
+
+  void SetLoadingSessionHistoryInfo(
+      const mozilla::dom::LoadingSessionHistoryInfo& aLoadingInfo,
+      bool aNeedToReportActiveAfterLoadingBecomesActive = false);
+  const mozilla::dom::LoadingSessionHistoryInfo*
+  GetLoadingSessionHistoryInfo() {
+    return mLoadingEntry.get();
+  }
+
+  already_AddRefed<nsIInputStream> GetPostDataFromCurrentEntry() const;
+  mozilla::Maybe<uint32_t> GetCacheKeyFromCurrentEntry() const;
+
+  // Loading and/or active entries are only set when session history
+  // in the parent is on.
+  bool FillLoadStateFromCurrentEntry(nsDocShellLoadState& aLoadState);
+
+  static bool ShouldAddToSessionHistory(nsIURI* aURI, nsIChannel* aChannel);
+
+  bool IsOSHE(nsISHEntry* aEntry) const { return mOSHE == aEntry; }
+
+  mozilla::dom::ChildSHistory* GetSessionHistory() {
+    return mBrowsingContext->GetChildSessionHistory();
+  }
+
+  // This returns true only when using session history in parent.
+  bool IsLoadingFromSessionHistory();
+
+  NS_IMETHODIMP OnStartRequest(nsIRequest* aRequest) override;
+  NS_IMETHODIMP OnStopRequest(nsIRequest* aRequest,
+                              nsresult aStatusCode) override;
+
+ private:  // member functions
+  friend class nsAppShellService;
+  friend class nsDSURIContentListener;
+  friend class FramingChecker;
+  friend class OnLinkClickEvent;
+  friend class nsIDocShell;
+  friend class mozilla::dom::BrowsingContext;
+  friend class mozilla::net::DocumentLoadListener;
+  friend class nsGlobalWindowOuter;
+
+  nsDocShell(mozilla::dom::BrowsingContext* aBrowsingContext,
+             uint64_t aContentWindowID);
+
+  static inline uint32_t PRTimeToSeconds(PRTime aTimeUsec) {
+    return uint32_t(aTimeUsec / PR_USEC_PER_SEC);
+  }
+
+  virtual ~nsDocShell();
+
+  //
+  // nsDocLoader
+  //
+
+  virtual void DestroyChildren() override;
+
+  // Overridden from nsDocLoader, this provides more information than the
+  // normal OnStateChange with flags STATE_REDIRECTING
+  virtual void OnRedirectStateChange(nsIChannel* aOldChannel,
+                                     nsIChannel* aNewChannel,
+                                     uint32_t aRedirectFlags,
+                                     uint32_t aStateFlags) override;
+
+  // Override the parent setter from nsDocLoader
+  virtual nsresult SetDocLoaderParent(nsDocLoader* aLoader) override;
+
+  //
+  // Content Viewer Management
+  //
+
+  nsresult EnsureDocumentViewer();
+
+  // aPrincipal can be passed in if the caller wants. If null is
+  // passed in, the about:blank principal will end up being used.
+  // aCSP, if any, will be used for the new about:blank load.
+  nsresult CreateAboutBlankDocumentViewer(
+      nsIPrincipal* aPrincipal, nsIPrincipal* aPartitionedPrincipal,
+      nsIContentSecurityPolicy* aCSP, nsIURI* aBaseURI, bool aIsInitialDocument,
+      const mozilla::Maybe<nsILoadInfo::CrossOriginEmbedderPolicy>& aCOEP =
+          mozilla::Nothing(),
+      bool aTryToSaveOldPresentation = true, bool aCheckPermitUnload = true,
+      mozilla::dom::WindowGlobalChild* aActor = nullptr);
+
+  nsresult CreateDocumentViewer(const nsACString& aContentType,
+                                nsIRequest* aRequest,
+                                nsIStreamListener** aContentHandler);
+
+  nsresult NewDocumentViewerObj(const nsACString& aContentType,
+                                nsIRequest* aRequest, nsILoadGroup* aLoadGroup,
+                                nsIStreamListener** aContentHandler,
+                                nsIDocumentViewer** aViewer);
+
+  already_AddRefed<nsILoadURIDelegate> GetLoadURIDelegate();
+
+  nsresult SetupNewViewer(
+      nsIDocumentViewer* aNewViewer,
+      mozilla::dom::WindowGlobalChild* aWindowActor = nullptr);
+
+  //
+  // Session History
+  //
+
+  // Either aChannel or aOwner must be null. If aChannel is
+  // present, the owner should be gotten from it.
+  // If aCloneChildren is true, then our current session history's
+  // children will be cloned onto the new entry. This should be
+  // used when we aren't actually changing the document while adding
+  // the new session history entry.
+  // aCsp is the CSP to be used for the load. That is *not* the CSP
+  // that will be applied to subresource loads within that document
+  // but the CSP for the document load itself. E.g. if that CSP
+  // includes upgrade-insecure-requests, then the new top-level load
+  // will be upgraded to HTTPS.
+  nsresult AddToSessionHistory(nsIURI* aURI, nsIChannel* aChannel,
+                               nsIPrincipal* aTriggeringPrincipal,
+                               nsIPrincipal* aPrincipalToInherit,
+                               nsIPrincipal* aPartitionedPrincipalToInherit,
+                               nsIContentSecurityPolicy* aCsp,
+                               bool aCloneChildren, nsISHEntry** aNewEntry);
+
+  void UpdateActiveEntry(
+      bool aReplace, const mozilla::Maybe<nsPoint>& aPreviousScrollPos,
+      nsIURI* aURI, nsIURI* aOriginalURI, nsIReferrerInfo* aReferrerInfo,
+      nsIPrincipal* aTriggeringPrincipal, nsIContentSecurityPolicy* aCsp,
+      const nsAString& aTitle, bool aScrollRestorationIsManual,
+      nsIStructuredCloneContainer* aData, bool aURIWasModified);
+
+  nsresult AddChildSHEntry(nsISHEntry* aCloneRef, nsISHEntry* aNewEntry,
+                           int32_t aChildOffset, uint32_t aLoadType,
+                           bool aCloneChildren);
+
+  nsresult AddChildSHEntryToParent(nsISHEntry* aNewEntry, int32_t aChildOffset,
+                                   bool aCloneChildren);
+
+  // Call this method to swap in a new history entry to m[OL]SHE, rather than
+  // setting it directly. This completes the navigation in all docshells
+  // in the case of a subframe navigation.
+  // Returns old mOSHE/mLSHE.
+  already_AddRefed<nsISHEntry> SetHistoryEntry(nsCOMPtr<nsISHEntry>* aPtr,
+                                               nsISHEntry* aEntry);
+
+  // This method calls SetHistoryEntry and updates mOSHE and mLSHE in BC to be
+  // the same as in docshell
+  void SetHistoryEntryAndUpdateBC(const mozilla::Maybe<nsISHEntry*>& aLSHE,
+                                  const mozilla::Maybe<nsISHEntry*>& aOSHE);
+
+  // If aNotifiedBeforeUnloadListeners is true, "beforeunload" event listeners
+  // were notified by the caller and given the chance to abort the navigation,
+  // and should not be notified again.
+  static nsresult ReloadDocument(
+      nsDocShell* aDocShell, mozilla::dom::Document* aDocument,
+      uint32_t aLoadType, mozilla::dom::BrowsingContext* aBrowsingContext,
+      nsIURI* aCurrentURI, nsIReferrerInfo* aReferrerInfo,
+      bool aNotifiedBeforeUnloadListeners = false);
+
+ public:
+  bool IsAboutBlankLoadOntoInitialAboutBlank(nsIURI* aURI,
+                                             bool aInheritPrincipal,
+                                             nsIPrincipal* aPrincipalToInherit);
+
+ private:
+  //
+  // URI Load
+  //
+
+  // Actually open a channel and perform a URI load. Callers need to pass a
+  // non-null aLoadState->TriggeringPrincipal() which initiated the URI load.
+  // Please note that the TriggeringPrincipal will be used for performing
+  // security checks. If aLoadState->URI() is provided by the web, then please
+  // do not pass a SystemPrincipal as the triggeringPrincipal. If
+  // aLoadState()->PrincipalToInherit is null, then no inheritance of any sort
+  // will happen and the load will get a principal based on the URI being
+  // loaded. If the Srcdoc flag is set (INTERNAL_LOAD_FLAGS_IS_SRCDOC), the load
+  // will be considered as a srcdoc load, and the contents of Srcdoc will be
+  // loaded instead of the URI. aLoadState->OriginalURI() will be set as the
+  // originalURI on the channel that does the load. If OriginalURI is null, URI
+  // will be set as the originalURI. If LoadReplace is true, LOAD_REPLACE flag
+  // will be set on the nsIChannel.
+  // If `aCacheKey` is supplied, use it for the session history entry.
+  nsresult DoURILoad(nsDocShellLoadState* aLoadState,
+                     mozilla::Maybe<uint32_t> aCacheKey, nsIRequest** aRequest);
+
+  static nsresult AddHeadersToChannel(nsIInputStream* aHeadersData,
+                                      nsIChannel* aChannel);
+
+  nsresult OpenInitializedChannel(nsIChannel* aChannel,
+                                  nsIURILoader* aURILoader,
+                                  uint32_t aOpenFlags);
+  nsresult OpenRedirectedChannel(nsDocShellLoadState* aLoadState);
+
+  void UpdateMixedContentChannelForNewLoad(nsIChannel* aChannel);
+
+  MOZ_CAN_RUN_SCRIPT
+  nsresult ScrollToAnchor(bool aCurHasRef, bool aNewHasRef,
+                          nsACString& aNewHash, uint32_t aLoadType);
+
+  // This returns the load type for a form submission (see
+  // https://html.spec.whatwg.org/#form-submission-algorithm). The load type
+  // should be set as soon as the target BC has been determined.
+  uint32_t GetLoadTypeForFormSubmission(
+      mozilla::dom::BrowsingContext* aTargetBC,
+      nsDocShellLoadState* aLoadState);
+
+ private:
+  // Returns true if it is the caller's responsibility to ensure
+  // FireOnLocationChange is called.
+  // In all other cases false is returned.
+  // Either aChannel or aTriggeringPrincipal must be null. If aChannel is
+  // present, the owner should be gotten from it.
+  // If OnNewURI calls AddToSessionHistory, it will pass its
+  // aCloneSHChildren argument as aCloneChildren.
+  // aCsp is the CSP to be used for the load. That is *not* the CSP
+  // that will be applied to subresource loads within that document
+  // but the CSP for the document load itself. E.g. if that CSP
+  // includes upgrade-insecure-requests, then the new top-level load
+  // will be upgraded to HTTPS.
+  bool OnNewURI(nsIURI* aURI, nsIChannel* aChannel,
+                nsIPrincipal* aTriggeringPrincipal,
+                nsIPrincipal* aPrincipalToInherit,
+                nsIPrincipal* aPartitionedPrincipalToInherit,
+                nsIContentSecurityPolicy* aCsp, bool aAddToGlobalHistory,
+                bool aCloneSHChildren);
+
+ public:
+  // If wireframe collection is enabled, will attempt to gather the
+  // wireframe for the document.
+  mozilla::Maybe<mozilla::dom::Wireframe> GetWireframe();
+
+  // If wireframe collection is enabled, will attempt to gather the
+  // wireframe for the document and stash it inside of the active history
+  // entry. Returns true if wireframes were collected.
+  bool CollectWireframe();
+
+  // Helper method that is called when a new document (including any
+  // sub-documents - ie. frames) has been completely loaded.
+  MOZ_CAN_RUN_SCRIPT_BOUNDARY
+  nsresult EndPageLoad(nsIWebProgress* aProgress, nsIChannel* aChannel,
+                       nsresult aResult);
+
+  // Builds an error page URI (e.g. about:neterror?etc) for the given aURI
+  // and displays it via the LoadErrorPage() overload below.
+  nsresult LoadErrorPage(nsIURI* aURI, const char16_t* aURL,
+                         const char* aErrorPage, const char* aErrorType,
+                         const char16_t* aDescription, const char* aCSSClass,
+                         nsIChannel* aFailedChannel);
+
+  // This method directly loads aErrorURI as an error page. aFailedURI and
+  // aFailedChannel come from DisplayLoadError() or the LoadErrorPage() overload
+  // above.
+  nsresult LoadErrorPage(nsIURI* aErrorURI, nsIURI* aFailedURI,
+                         nsIChannel* aFailedChannel);
+
+  bool DisplayLoadError(nsresult aError, nsIURI* aURI, const char16_t* aURL,
+                        nsIChannel* aFailedChannel) {
+    bool didDisplayLoadError = false;
+    DisplayLoadError(aError, aURI, aURL, aFailedChannel, &didDisplayLoadError);
+    return didDisplayLoadError;
+  }
+
+  //
+  // Uncategorized
+  //
+
+  // Get the principal that we'll set on the channel if we're inheriting. If
+  // aConsiderCurrentDocument is true, we try to use the current document if
+  // at all possible. If that fails, we fall back on the parent document.
+  // If that fails too, we force creation of a content viewer and use the
+  // resulting principal. If aConsiderCurrentDocument is false, we just look
+  // at the parent.
+  // If aConsiderPartitionedPrincipal is true, we consider the partitioned
+  // principal instead of the node principal.
+  nsIPrincipal* GetInheritedPrincipal(
+      bool aConsiderCurrentDocument,
+      bool aConsiderPartitionedPrincipal = false);
+
+  /**
+   * Helper function that caches a URI and a transition for saving later.
+   *
+   * @param aChannel
+   *        Channel that will have these properties saved
+   * @param aURI
+   *        The URI to save for later
+   * @param aChannelRedirectFlags
+   *        The nsIChannelEventSink redirect flags to save for later
+   */
+  static void SaveLastVisit(nsIChannel* aChannel, nsIURI* aURI,
+                            uint32_t aChannelRedirectFlags);
+
+  /**
+   * Helper function for adding a URI visit using IHistory.
+   *
+   * The IHistory API maintains chains of visits, tracking both HTTP referrers
+   * and redirects for a user session. VisitURI requires the current URI and
+   * the previous URI in the chain.
+   *
+   * Visits can be saved either during a redirect or when the request has
+   * reached its final destination. The previous URI in the visit may be
+   * from another redirect.
+   *
+   * @pre aURI is not null.
+   *
+   * @param aURI
+   *        The URI that was just visited
+   * @param aPreviousURI
+   *        The previous URI of this visit
+   * @param aChannelRedirectFlags
+   *        For redirects, the redirect flags from nsIChannelEventSink
+   *        (0 otherwise)
+   * @param aResponseStatus
+   *        For HTTP channels, the response code (0 otherwise).
+   */
+  void AddURIVisit(nsIURI* aURI, nsIURI* aPreviousURI,
+                   uint32_t aChannelRedirectFlags,
+                   uint32_t aResponseStatus = 0);
+
+  /**
+   * Internal helper funtion
+   */
+  static void InternalAddURIVisit(
+      nsIURI* aURI, nsIURI* aPreviousURI, uint32_t aChannelRedirectFlags,
+      uint32_t aResponseStatus, mozilla::dom::BrowsingContext* aBrowsingContext,
+      nsIWidget* aWidget, uint32_t aLoadType, bool aWasUpgraded);
+
+  static already_AddRefed<nsIURIFixupInfo> KeywordToURI(
+      const nsACString& aKeyword, bool aIsPrivateContext);
+
+  // Sets the current document's current state object to the given SHEntry's
+  // state object. The current state object is eventually given to the page
+  // in the PopState event.
+  void SetDocCurrentStateObj(nsISHEntry* aShEntry,
+                             mozilla::dom::SessionHistoryInfo* aInfo);
+
+  // Returns true if would have called FireOnLocationChange,
+  // but did not because aFireOnLocationChange was false on entry.
+  // In this case it is the caller's responsibility to ensure
+  // FireOnLocationChange is called.
+  // In all other cases false is returned.
+  bool SetCurrentURI(nsIURI* aURI, nsIRequest* aRequest,
+                     bool aFireOnLocationChange, bool aIsInitialAboutBlank,
+                     uint32_t aLocationFlags);
+
+  // The following methods deal with saving and restoring content viewers
+  // in session history.
+
+  // mDocumentViewer points to the current content viewer associated with
+  // this docshell. When loading a new document, the content viewer is
+  // either destroyed or stored into a session history entry. To make sure
+  // that destruction happens in a controlled fashion, a given content viewer
+  // is always owned in exactly one of these ways:
+  //   1) The content viewer is active and owned by a docshell's
+  //      mDocumentViewer.
+  //   2) The content viewer is still being displayed while we begin loading
+  //      a new document. The content viewer is owned by the _new_
+  //      content viewer's mPreviousViewer, and has a pointer to the
+  //      nsISHEntry where it will eventually be stored. The content viewer
+  //      has been close()d by the docshell, which detaches the document from
+  //      the window object.
+  //   3) The content viewer is cached in session history. The nsISHEntry
+  //      has the only owning reference to the content viewer. The viewer
+  //      has released its nsISHEntry pointer to prevent circular ownership.
+  //
+  // When restoring a content viewer from session history, open() is called
+  // to reattach the document to the window object. The content viewer is
+  // then placed into mDocumentViewer and removed from the history entry.
+  // (mDocumentViewer is put into session history as described above, if
+  // applicable).
+
+  // Determines whether we can safely cache the current mDocumentViewer in
+  // session history. This checks a number of factors such as cache policy,
+  // pending requests, and unload handlers.
+  // |aLoadType| should be the load type that will replace the current
+  // presentation. |aNewRequest| should be the request for the document to
+  // be loaded in place of the current document, or null if such a request
+  // has not been created yet. |aNewDocument| should be the document that will
+  // replace the current document.
+  bool CanSavePresentation(uint32_t aLoadType, nsIRequest* aNewRequest,
+                           mozilla::dom::Document* aNewDocument,
+                           bool aReportBFCacheComboTelemetry);
+
+  static void ReportBFCacheComboTelemetry(uint32_t aCombo);
+
+  // Captures the state of the supporting elements of the presentation
+  // (the "window" object, docshell tree, meta-refresh loads, and security
+  // state) and stores them on |mOSHE|.
+  nsresult CaptureState();
+
+  // Begin the toplevel restore process for |aSHEntry|.
+  // This simulates a channel open, and defers the real work until
+  // RestoreFromHistory is called from a PLEvent.
+  nsresult RestorePresentation(nsISHEntry* aSHEntry, bool* aRestoring);
+
+  // Call BeginRestore(nullptr, false) for each child of this shell.
+  nsresult BeginRestoreChildren();
+
+  // Method to get our current position and size without flushing
+  void DoGetPositionAndSize(int32_t* aX, int32_t* aY, int32_t* aWidth,
+                            int32_t* aHeight);
+
+  // Call this when a URI load is handed to us (via OnLinkClick or
+  // InternalLoad). This makes sure that we're not inside unload, or that if
+  // we are it's still OK to load this URI.
+  bool IsOKToLoadURI(nsIURI* aURI);
+
+  // helpers for executing commands
+  nsresult GetControllerForCommand(const char* aCommand,
+                                   nsIController** aResult);
+
+  // Possibly create a ClientSource object to represent an initial about:blank
+  // window that has not been allocated yet.  Normally we try not to create
+  // this about:blank window until something calls GetDocument().  We still need
+  // the ClientSource to exist for this conceptual window, though.
+  //
+  // The ClientSource is created with the given principal if specified.  If
+  // the principal is not provided we will attempt to inherit it when we
+  // are sure it will match what the real about:blank window principal
+  // would have been.  There are some corner cases where we cannot easily
+  // determine the correct principal and will not create the ClientSource.
+  // In these cases the initial about:blank will appear to not exist until
+  // its real document and window are created.
+  void MaybeCreateInitialClientSource(nsIPrincipal* aPrincipal = nullptr);
+
+  // Determine if a service worker is allowed to control a window in this
+  // docshell with the given URL.  If there are any reasons it should not,
+  // this will return false.  If true is returned then the window *may* be
+  // controlled.  The caller must still consult either the parent controller
+  // or the ServiceWorkerManager to determine if a service worker should
+  // actually control the window.
+  bool ServiceWorkerAllowedToControlWindow(nsIPrincipal* aPrincipal,
+                                           nsIURI* aURI);
+
+  // Return the ClientInfo for the initial about:blank window, if it exists
+  // or we have speculatively created a ClientSource in
+  // MaybeCreateInitialClientSource().  This can return a ClientInfo object
+  // even if GetExtantDoc() returns nullptr.
+  mozilla::Maybe<mozilla::dom::ClientInfo> GetInitialClientInfo() const;
+
+  /**
+   * Initializes mTiming if it isn't yet.
+   * After calling this, mTiming is non-null. This method returns true if the
+   * initialization of the Timing can be reset (basically this is true if a new
+   * Timing object is created).
+   * In case the loading is aborted, MaybeResetInitTiming() can be called
+   * passing the return value of MaybeInitTiming(): if it's possible to reset
+   * the Timing, this method will do it.
+   */
+  [[nodiscard]] bool MaybeInitTiming();
+  void MaybeResetInitTiming(bool aReset);
+
+  // Convenience method for getting our parent docshell. Can return null
+  already_AddRefed<nsDocShell> GetInProcessParentDocshell();
+
+  // Internal implementation of nsIDocShell::FirePageHideNotification.
+  // If aSkipCheckingDynEntries is true, it will not try to remove dynamic
+  // subframe entries. This is to avoid redundant RemoveDynEntries calls in all
+  // children docshells.
+  // TODO: Convert this to MOZ_CAN_RUN_SCRIPT (bug 1415230)
+  MOZ_CAN_RUN_SCRIPT_BOUNDARY void FirePageHideNotificationInternal(
+      bool aIsUnload, bool aSkipCheckingDynEntries);
+
+  void ThawFreezeNonRecursive(bool aThaw);
+  // TODO: Convert this to MOZ_CAN_RUN_SCRIPT (bug 1415230)
+  MOZ_CAN_RUN_SCRIPT_BOUNDARY void FirePageHideShowNonRecursive(bool aShow);
+
+  nsresult Dispatch(already_AddRefed<nsIRunnable>&& aRunnable);
+
+  void ReattachEditorToWindow(nsISHEntry* aSHEntry);
+  void ClearFrameHistory(nsISHEntry* aEntry);
+  // Determine if this type of load should update history.
+  static bool ShouldUpdateGlobalHistory(uint32_t aLoadType);
+  void UpdateGlobalHistoryTitle(nsIURI* aURI);
+  bool IsSubframe() { return mBrowsingContext->IsSubframe(); }
+  bool CanSetOriginAttributes();
+  bool ShouldBlockLoadingForBackButton();
+  static bool ShouldDiscardLayoutState(nsIHttpChannel* aChannel);
+  bool HasUnloadedParent();
+  bool JustStartedNetworkLoad();
+  bool NavigationBlockedByPrinting(bool aDisplayErrorDialog = true);
+  bool IsNavigationAllowed(bool aDisplayPrintErrorDialog = true,
+                           bool aCheckIfUnloadFired = true);
+  nsIScrollableFrame* GetRootScrollFrame();
+  nsIChannel* GetCurrentDocChannel();
+  nsresult EnsureScriptEnvironment();
+  nsresult EnsureEditorData();
+  nsresult EnsureTransferableHookData();
+  nsresult EnsureFind();
+  nsresult EnsureCommandHandler();
+  nsresult RefreshURIFromQueue();
+  void RefreshURIToQueue();
+  nsresult Embed(nsIDocumentViewer* aDocumentViewer,
+                 mozilla::dom::WindowGlobalChild* aWindowActor,
+                 bool aIsTransientAboutBlank, bool aPersist,
+                 nsIRequest* aRequest, nsIURI* aPreviousURI);
+  nsPresContext* GetEldestPresContext();
+  nsresult CheckLoadingPermissions();
+  nsresult LoadHistoryEntry(nsISHEntry* aEntry, uint32_t aLoadType,
+                            bool aUserActivation);
+  nsresult LoadHistoryEntry(
+      const mozilla::dom::LoadingSessionHistoryInfo& aEntry, uint32_t aLoadType,
+      bool aUserActivation);
+  nsresult LoadHistoryEntry(nsDocShellLoadState* aLoadState, uint32_t aLoadType,
+                            bool aLoadingCurrentEntry);
+  nsresult GetHttpChannel(nsIChannel* aChannel, nsIHttpChannel** aReturn);
+  nsresult ConfirmRepost(bool* aRepost);
+  nsresult GetPromptAndStringBundle(nsIPrompt** aPrompt,
+                                    nsIStringBundle** aStringBundle);
+  nsresult SetCurScrollPosEx(int32_t aCurHorizontalPos,
+                             int32_t aCurVerticalPos);
+  nsPoint GetCurScrollPos();
+
+  already_AddRefed<mozilla::dom::ChildSHistory> GetRootSessionHistory();
+
+  bool CSSErrorReportingEnabled() const { return mCSSErrorReportingEnabled; }
+
+  // Handles retrieval of subframe session history for nsDocShell::LoadURI. If a
+  // load is requested in a subframe of the current DocShell, the subframe
+  // loadType may need to reflect the loadType of the parent document, or in
+  // some cases (like reloads), the history load may need to be cancelled. See
+  // function comments for in-depth logic descriptions.
+  // Returns true if the method itself deals with the load.
+  bool MaybeHandleSubframeHistory(nsDocShellLoadState* aLoadState,
+                                  bool aContinueHandlingSubframeHistory);
+
+  // If we are passed a named target during InternalLoad, this method handles
+  // moving the load to the browsing context the target name resolves to.
+  nsresult PerformRetargeting(nsDocShellLoadState* aLoadState);
+
+  // Returns one of nsIContentPolicy::TYPE_DOCUMENT,
+  // nsIContentPolicy::TYPE_INTERNAL_IFRAME, or
+  // nsIContentPolicy::TYPE_INTERNAL_FRAME depending on who is responsible for
+  // this docshell.
+  nsContentPolicyType DetermineContentType();
+
+  // If this is an iframe, and the embedder is OOP, then notifes the
+  // embedder that loading has finished and we shouldn't be blocking
+  // load of the embedder. Only called when we fail to load, as we wait
+  // for the load event of our Document before notifying success.
+  //
+  // If aFireFrameErrorEvent is true, then fires an error event at the
+  // embedder element, for both in-process and OOP embedders.
+  void UnblockEmbedderLoadEventForFailure(bool aFireFrameErrorEvent = false);
+
+  struct SameDocumentNavigationState {
+    nsAutoCString mCurrentHash;
+    nsAutoCString mNewHash;
+    bool mCurrentURIHasRef = false;
+    bool mNewURIHasRef = false;
+    bool mSameExceptHashes = false;
+    bool mSecureUpgradeURI = false;
+    bool mHistoryNavBetweenSameDoc = false;
+  };
+
+  // Check to see if we're loading a prior history entry or doing a fragment
+  // navigation in the same document.
+  // NOTE: In case we are doing a fragment navigation, and HTTPS-Only/ -First
+  // mode is enabled and upgraded the underlying document, we update the URI of
+  // aLoadState from HTTP to HTTPS (if neccessary).
+  bool IsSameDocumentNavigation(nsDocShellLoadState* aLoadState,
+                                SameDocumentNavigationState& aState);
+
+  // ... If so, handle the scrolling or other action required instead of
+  // continuing with new document navigation.
+  MOZ_CAN_RUN_SCRIPT
+  nsresult HandleSameDocumentNavigation(nsDocShellLoadState* aLoadState,
+                                        SameDocumentNavigationState& aState,
+                                        bool& aSameDocument);
+
+  uint32_t GetSameDocumentNavigationFlags(nsIURI* aNewURI);
+
+  // Called when the Private Browsing state of a nsDocShell changes.
+  void NotifyPrivateBrowsingChanged();
+
+  // Internal helpers for BrowsingContext to pass update values to nsIDocShell's
+  // LoadGroup.
+  void SetLoadGroupDefaultLoadFlags(nsLoadFlags aLoadFlags);
+
+  void SetTitleOnHistoryEntry(bool aUpdateEntryInSessionHistory);
+
+  void SetScrollRestorationIsManualOnHistoryEntry(nsISHEntry* aSHEntry,
+                                                  bool aIsManual);
+
+  void SetCacheKeyOnHistoryEntry(nsISHEntry* aSHEntry, uint32_t aCacheKey);
+
+  // If the LoadState's URI is a javascript: URI, checks that the triggering
+  // principal subsumes the principal of the current document, and returns
+  // NS_ERROR_DOM_BAD_CROSS_ORIGIN_URI if it does not.
+  nsresult CheckDisallowedJavascriptLoad(nsDocShellLoadState* aLoadState);
+
+  nsresult LoadURI(nsDocShellLoadState* aLoadState, bool aSetNavigating,
+                   bool aContinueHandlingSubframeHistory);
+
+  // Sets the active entry to the current loading entry. aPersist is used in the
+  // case a new session history entry is added to the session history.
+  // aExpired is true if the relevant nsIChannel has its cache token expired.
+  // aCacheKey is the channel's cache key.
+  // aPreviousURI should be the URI that was previously loaded into the
+  // nsDocshell
+  void MoveLoadingToActiveEntry(bool aPersist, bool aExpired,
+                                uint32_t aCacheKey, nsIURI* aPreviousURI);
+
+  void ActivenessMaybeChanged();
+
+  /**
+   * Returns true if `noopener` will be force-enabled by any attempt to create
+   * a popup window, even if rel="opener" is requested.
+   */
+  bool NoopenerForceEnabled();
+
+  bool ShouldOpenInBlankTarget(const nsAString& aOriginalTarget,
+                               nsIURI* aLinkURI, nsIContent* aContent,
+                               bool aIsUserTriggered);
+
+  void RecordSingleChannelId(bool aStartRequest, nsIRequest* aRequest);
+
+  void SetChannelToDisconnectOnPageHide(uint64_t aChannelId) {
+    MOZ_ASSERT(mChannelToDisconnectOnPageHide == 0);
+    mChannelToDisconnectOnPageHide = aChannelId;
+  }
+  void MaybeDisconnectChildListenersOnPageHide();
+
+  /**
+   * Helper for addState and document.open that does just the
+   * history-manipulation guts.
+   *
+   * Arguments the spec defines:
+   *
+   * @param aDocument the document we're manipulating.  This will get the new
+   * URI.
+   * @param aNewURI the new URI.
+   * @param aData The serialized state data.  May be null.
+   * @param aTitle The new title.  May be empty.
+   * @param aReplace whether this should replace the exising SHEntry.
+   *
+   * Arguments we need internally because deriving them from the
+   * others is a bit complicated:
+   *
+   * @param aCurrentURI the current URI we're working with.  Might be null.
+   * @param aEqualURIs whether the two URIs involved are equal.
+   */
+  nsresult UpdateURLAndHistory(mozilla::dom::Document* aDocument,
+                               nsIURI* aNewURI,
+                               nsIStructuredCloneContainer* aData,
+                               const nsAString& aTitle, bool aReplace,
+                               nsIURI* aCurrentURI, bool aEqualURIs);
+
+ private:
+  void SetCurrentURIInternal(nsIURI* aURI);
+
+  // data members
+  nsString mTitle;
+  nsCString mOriginalUriString;
+  nsTObserverArray<nsWeakPtr> mPrivacyObservers;
+  nsTObserverArray<nsWeakPtr> mReflowObservers;
+  nsTObserverArray<nsWeakPtr> mScrollObservers;
+  mozilla::UniquePtr<mozilla::dom::ClientSource> mInitialClientSource;
+  nsCOMPtr<nsINetworkInterceptController> mInterceptController;
+  RefPtr<nsDOMNavigationTiming> mTiming;
+  RefPtr<nsDSURIContentListener> mContentListener;
+  RefPtr<nsGlobalWindowOuter> mScriptGlobal;
+  nsCOMPtr<nsIPrincipal> mParentCharsetPrincipal;
+  // The following 3 lists contain either nsITimer or nsRefreshTimer objects.
+  // URIs to refresh are collected to mRefreshURIList.
+  nsCOMPtr<nsIMutableArray> mRefreshURIList;
+  // mSavedRefreshURIList is used to move the entries from mRefreshURIList to
+  // mOSHE.
+  nsCOMPtr<nsIMutableArray> mSavedRefreshURIList;
+  // BFCache-in-parent implementation caches the entries in
+  // mBFCachedRefreshURIList.
+  nsCOMPtr<nsIMutableArray> mBFCachedRefreshURIList;
+  uint64_t mContentWindowID;
+  nsCOMPtr<nsIDocumentViewer> mDocumentViewer;
+  nsCOMPtr<nsIWidget> mParentWidget;
+  RefPtr<mozilla::dom::ChildSHistory> mSessionHistory;
+  nsCOMPtr<nsIWebBrowserFind> mFind;
+  RefPtr<nsCommandManager> mCommandManager;
+  RefPtr<mozilla::dom::BrowsingContext> mBrowsingContext;
+
+  // Weak reference to our BrowserChild actor.
+  nsWeakPtr mBrowserChild;
+
+  // Dimensions of the docshell
+  nsIntRect mBounds;
+
+  /**
+   * Content-Type Hint of the most-recently initiated load. Used for
+   * session history entries.
+   */
+  nsCString mContentTypeHint;
+
+  // mCurrentURI should be marked immutable on set if possible.
+  // Change mCurrentURI only through SetCurrentURIInternal method.
+  nsCOMPtr<nsIURI> mCurrentURI;
+  nsCOMPtr<nsIReferrerInfo> mReferrerInfo;
+
+#ifdef DEBUG
+  // We're counting the number of |nsDocShells| to help find leaks
+  static unsigned long gNumberOfDocShells;
+
+  nsCOMPtr<nsIURI> mLastOpenedURI;
+#endif
+
+  // Reference to the SHEntry for this docshell until the page is destroyed.
+  // Somebody give me better name
+  // Only used when SHIP is disabled.
+  nsCOMPtr<nsISHEntry> mOSHE;
+
+  // Reference to the SHEntry for this docshell until the page is loaded
+  // Somebody give me better name.
+  // If mLSHE is non-null, non-pushState subframe loads don't create separate
+  // root history entries. That is, frames loaded during the parent page
+  // load don't generate history entries the way frame navigation after the
+  // parent has loaded does. (This isn't the only purpose of mLSHE.)
+  // Only used when SHIP is disabled.
+  nsCOMPtr<nsISHEntry> mLSHE;
+
+  // These are only set when fission.sessionHistoryInParent is set.
+  mozilla::UniquePtr<mozilla::dom::SessionHistoryInfo> mActiveEntry;
+  bool mActiveEntryIsLoadingFromSessionHistory = false;
+  // mLoadingEntry is set when we're about to start loading. Whenever
+  // setting mLoadingEntry, be sure to also set
+  // mNeedToReportActiveAfterLoadingBecomesActive.
+  mozilla::UniquePtr<mozilla::dom::LoadingSessionHistoryInfo> mLoadingEntry;
+
+  // Holds a weak pointer to a RestorePresentationEvent object if any that
+  // holds a weak pointer back to us. We use this pointer to possibly revoke
+  // the event whenever necessary.
+  nsRevocableEventPtr<RestorePresentationEvent> mRestorePresentationEvent;
+
+  // Editor data, if this document is designMode or contentEditable.
+  mozilla::UniquePtr<nsDocShellEditorData> mEditorData;
+
+  // The URI we're currently loading. This is only relevant during the
+  // firing of a pagehide/unload. The caller of FirePageHideNotification()
+  // is responsible for setting it and unsetting it. It may be null if the
+  // pagehide/unload is happening for some reason other than just loading a
+  // new URI.
+  nsCOMPtr<nsIURI> mLoadingURI;
+
+  // Set in LoadErrorPage from the method argument and used later
+  // in CreateDocumentViewer. We have to delay an shistory entry creation
+  // for which these objects are needed.
+  nsCOMPtr<nsIURI> mFailedURI;
+  nsCOMPtr<nsIChannel> mFailedChannel;
+
+  mozilla::UniquePtr<mozilla::gfx::Matrix5x4> mColorMatrix;
+
+  const mozilla::Encoding* mParentCharset;
+
+  // WEAK REFERENCES BELOW HERE.
+  // Note these are intentionally not addrefd. Doing so will create a cycle.
+  // For that reasons don't use nsCOMPtr.
+
+  nsIDocShellTreeOwner* mTreeOwner;  // Weak Reference
+
+  RefPtr<mozilla::dom::EventTarget> mChromeEventHandler;
+
+  mozilla::ScrollbarPreference mScrollbarPref;  // persistent across doc loads
+
+  eCharsetReloadState mCharsetReloadState;
+
+  int32_t mParentCharsetSource;
+  mozilla::CSSIntSize mFrameMargins;
+
+  // This can either be a content docshell or a chrome docshell.
+  const int32_t mItemType;
+
+  // Index into the nsISHEntry array, indicating the previous and current
+  // entry at the time that this DocShell begins to load. Consequently
+  // root docshell's indices can differ from child docshells'.
+  int32_t mPreviousEntryIndex;
+  int32_t mLoadedEntryIndex;
+
+  BusyFlags mBusyFlags;
+  AppType mAppType;
+  uint32_t mLoadType;
+  uint32_t mFailedLoadType;
+
+  // Whether or not handling of the <meta name="viewport"> tag is overridden.
+  // Possible values are defined as constants in nsIDocShell.idl.
+  MetaViewportOverride mMetaViewportOverride;
+
+  // See WindowGlobalParent::mSingleChannelId.
+  mozilla::Maybe<uint64_t> mSingleChannelId;
+  uint32_t mRequestForBlockingFromBFCacheCount = 0;
+
+  uint64_t mChannelToDisconnectOnPageHide;
+
+  uint32_t mPendingReloadCount = 0;
+
+  // The following two fields cannot be declared as bit fields
+  // because of uses with AutoRestore.
+  bool mCreatingDocument;  // (should be) debugging only
+#ifdef DEBUG
+  bool mInEnsureScriptEnv;
+  uint64_t mDocShellID = 0;
+#endif
+
+  bool mInitialized : 1;
+  bool mAllowSubframes : 1;
+  bool mAllowMetaRedirects : 1;
+  bool mAllowImages : 1;
+  bool mAllowMedia : 1;
+  bool mAllowDNSPrefetch : 1;
+  bool mAllowWindowControl : 1;
+  bool mCSSErrorReportingEnabled : 1;
+  bool mAllowAuth : 1;
+  bool mAllowKeywordFixup : 1;
+  bool mDisableMetaRefreshWhenInactive : 1;
+  bool mIsAppTab : 1;
+  bool mWindowDraggingAllowed : 1;
+  bool mInFrameSwap : 1;
+
+  // This boolean is set to true right before we fire pagehide and generally
+  // unset when we embed a new content viewer. While it's true no navigation
+  // is allowed in this docshell.
+  bool mFiredUnloadEvent : 1;
+
+  // this flag is for bug #21358. a docshell may load many urls
+  // which don't result in new documents being created (i.e. a new
+  // content viewer) we want to make sure we don't call a on load
+  // event more than once for a given content viewer.
+  bool mEODForCurrentDocument : 1;
+  bool mURIResultedInDocument : 1;
+
+  bool mIsBeingDestroyed : 1;
+
+  bool mIsExecutingOnLoadHandler : 1;
+
+  // Indicates to CreateDocumentViewer() that it is safe to cache the old
+  // presentation of the page, and to SetupNewViewer() that the old viewer
+  // should be passed a SHEntry to save itself into.
+  // Only used with SHIP disabled.
+  bool mSavingOldViewer : 1;
+
+  bool mInvisible : 1;
+  bool mHasLoadedNonBlankURI : 1;
+
+  // This flag means that mTiming has been initialized but nulled out.
+  // We will check the innerWin's timing before creating a new one
+  // in MaybeInitTiming()
+  bool mBlankTiming : 1;
+
+  // This flag indicates when the title is valid for the current URI.
+  bool mTitleValidForCurrentURI : 1;
+
+  // If mWillChangeProcess is set to true, then when the docshell is destroyed,
+  // we prepare the browsing context to change process.
+  bool mWillChangeProcess : 1;
+
+  // This flag indicates whether or not the DocShell is currently executing an
+  // nsIWebNavigation navigation method.
+  bool mIsNavigating : 1;
+
+  // Whether we have a pending encoding autodetection request from the
+  // menu for all encodings.
+  bool mForcedAutodetection : 1;
+
+  /*
+   * Set to true if we're checking session history (in the parent process) for
+   * a possible history load. Used only with iframes.
+   */
+  bool mCheckingSessionHistory : 1;
+
+  // Whether mBrowsingContext->SetActiveSessionHistoryEntry() needs to be called
+  // when the loading entry becomes the active entry. This is used for the
+  // initial about:blank-replacing about:blank in order to make the history
+  // length WPTs pass.
+  bool mNeedToReportActiveAfterLoadingBecomesActive : 1;
+};
+
+inline nsISupports* ToSupports(nsDocShell* aDocShell) {
+  return static_cast<nsIDocumentLoader*>(aDocShell);
+}
+
+#endif /* nsDocShell_h__ */
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