Merge branch 'redwood' into releaseRELBASE_20201124RELBASE_20201120RC_20201120

154 files changed, 5163 insertions, 4503 deletions

diff --git a/build/moz.configure/old.configure b/build/moz.configure/old.configure
index 525129d34..559e24a74 100644
--- a/build/moz.configure/old.configure
+++ b/build/moz.configure/old.configure
@@ -162,6 +162,8 @@ def old_configure_options(*options):
     '--enable-b2g-camera',
     '--enable-b2g-ril',
     '--enable-bundled-fonts',
+    '--enable-chrome-compression',
+    '--enable-chrome-format',
     '--enable-clang-plugin',
     '--enable-content-sandbox',
     '--enable-cookies',
@@ -263,6 +265,7 @@ def old_configure_options(*options):
     '--with-app-name',
     '--with-arch',
     '--with-branding',
+    '--with-chrome-name',
     '--with-crashreporter-enable-percent',
     '--with-cross-lib',
     '--with-debug-label',
diff --git a/config/config.mk b/config/config.mk
index 5a352e529..6208d124e 100644
--- a/config/config.mk
+++ b/config/config.mk
@@ -216,7 +216,7 @@ endif # NO_PROFILE_GUIDED_OPTIMIZE
 
 MAKE_JARS_FLAGS = \
 	-t $(topsrcdir) \
-	-f $(MOZ_JAR_MAKER_FILE_FORMAT) \
+	-f $(MOZ_CHROME_FILE_FORMAT) \
 	$(NULL)
 
 ifdef USE_EXTENSION_MANIFEST
diff --git a/config/system-headers b/config/system-headers
index 3685d6d1c..015644428 100644
--- a/config/system-headers
+++ b/config/system-headers
@@ -526,7 +526,6 @@ hardware/lights.h
 hardware/power.h
 hardware_legacy/power.h
 hardware_legacy/uevent.h
-hardware_legacy/vibrator.h
 #endif
 HIToolbox/HIToolbox.h
 hlink.h
diff --git a/config/tests/src-simple/Makefile.in b/config/tests/src-simple/Makefile.in
index 55fdfd867..96f9a4154 100644
--- a/config/tests/src-simple/Makefile.in
+++ b/config/tests/src-simple/Makefile.in
@@ -22,7 +22,7 @@ REF_MANIFEST = $(if $(USE_EXTENSION_MANIFEST),chrome.manifest,test.manifest)
 
 check-%::
 	if test -d $(FINAL_TARGET); then rm -rf $(FINAL_TARGET); fi;
-	$(MAKE) realchrome MOZ_JAR_MAKER_FILE_FORMAT=$*
+	$(MAKE) realchrome MOZ_CHROME_FILE_FORMAT=$*
 	@echo 'Comparing manifests...'
 	@if ! sort $(MY_MANIFEST) | diff --text -U 0 $(srcdir)/../$(REF_MANIFEST).$* - ; then \
 	  echo 'TEST-UNEXPECTED-FAIL | config/tests/$(REF_MANIFEST).$* | differing content in manifest!' ; \
diff --git a/devtools/client/menus.js b/devtools/client/menus.js
index 23f024f04..9b3d3c0b3 100644
--- a/devtools/client/menus.js
+++ b/devtools/client/menus.js
@@ -94,7 +94,7 @@ exports.menuitems = [
     },
     key: {
       id: "browserToolbox",
-      modifiers: "accel,alt,shift",
+      modifiers: isMac ? "accel,alt" : "accel,shift",
       keytext: true
     }
   },
diff --git a/devtools/shared/css/generated/properties-db.js b/devtools/shared/css/generated/properties-db.js
index 01358a033..d149995d9 100644
--- a/devtools/shared/css/generated/properties-db.js
+++ b/devtools/shared/css/generated/properties-db.js
@@ -1233,7 +1233,7 @@ exports.CSS_PROPERTIES = {
   "-moz-tab-size": {
     "isInherited": true,
     "subproperties": [
-      "-moz-tab-size"
+      "tab-size"
     ],
     "supports": [
       7
@@ -3052,7 +3052,7 @@ exports.CSS_PROPERTIES = {
       "stroke-opacity",
       "stroke-width",
       "-x-system-font",
-      "-moz-tab-size",
+      "tab-size",
       "table-layout",
       "text-align",
       "text-align-last",
@@ -8650,6 +8650,23 @@ exports.CSS_PROPERTIES = {
       "unset"
     ]
   },
+  "tab-size": {
+    "isInherited": true,
+    "subproperties": [
+      "tab-size"
+    ],
+    "supports": [
+      6,
+      7
+    ],
+    "values": [
+      "-moz-calc",
+      "calc",
+      "inherit",
+      "initial",
+      "unset"
+    ]
+  },
   "table-layout": {
     "isInherited": false,
     "subproperties": [
diff --git a/dom/animation/test/mozilla/file_discrete-animations.html b/dom/animation/test/mozilla/file_discrete-animations.html
index 35e818a90..eeaaa33c4 100644
--- a/dom/animation/test/mozilla/file_discrete-animations.html
+++ b/dom/animation/test/mozilla/file_discrete-animations.html
@@ -75,11 +75,6 @@ const gMozillaSpecificProperties = {
     from: "ignore",
     to: "stretch-to-fit"
   },
-  "-moz-tab-size": {
-    // https://drafts.csswg.org/css-text-3/#propdef-tab-size
-    from: "1",
-    to: "5"
-  },
   "-moz-text-size-adjust": {
     // https://drafts.csswg.org/css-size-adjust/#propdef-text-size-adjust
     from: "none",
diff --git a/dom/base/Navigator.cpp b/dom/base/Navigator.cpp
index 53ce2b30f..977b07538 100644
--- a/dom/base/Navigator.cpp
+++ b/dom/base/Navigator.cpp
@@ -98,11 +98,6 @@
 namespace mozilla {
 namespace dom {
 
-static bool sVibratorEnabled   = false;
-static uint32_t sMaxVibrateMS  = 0;
-static uint32_t sMaxVibrateListLen = 0;
-static const char* kVibrationPermissionType = "vibration";
-
 static void
 AddPermission(nsIPrincipal* aPrincipal, const char* aType, uint32_t aPermission,
               uint32_t aExpireType, int64_t aExpireTime)
@@ -153,12 +148,7 @@ GetPermission(nsIPrincipal* aPrincipal, const char* aType)
 void
 Navigator::Init()
 {
-  Preferences::AddBoolVarCache(&sVibratorEnabled,
-                               "dom.vibrator.enabled", true);
-  Preferences::AddUintVarCache(&sMaxVibrateMS,
-                               "dom.vibrator.max_vibrate_ms", 10000);
-  Preferences::AddUintVarCache(&sMaxVibrateListLen,
-                               "dom.vibrator.max_vibrate_list_len", 128);
+  // Add any Preferences::Add*VarCache(&sPref, "pref", default) here if needed.
 }
 
 Navigator::Navigator(nsPIDOMWindowInner* aWindow)
@@ -706,82 +696,6 @@ Navigator::RefreshMIMEArray()
   }
 }
 
-namespace {
-
-class VibrateWindowListener : public nsIDOMEventListener
-{
-public:
-  VibrateWindowListener(nsPIDOMWindowInner* aWindow, nsIDocument* aDocument)
-  {
-    mWindow = do_GetWeakReference(aWindow);
-    mDocument = do_GetWeakReference(aDocument);
-
-    NS_NAMED_LITERAL_STRING(visibilitychange, "visibilitychange");
-    aDocument->AddSystemEventListener(visibilitychange,
-                                      this, /* listener */
-                                      true, /* use capture */
-                                      false /* wants untrusted */);
-  }
-
-  void RemoveListener();
-
-  NS_DECL_ISUPPORTS
-  NS_DECL_NSIDOMEVENTLISTENER
-
-private:
-  virtual ~VibrateWindowListener()
-  {
-  }
-
-  nsWeakPtr mWindow;
-  nsWeakPtr mDocument;
-};
-
-NS_IMPL_ISUPPORTS(VibrateWindowListener, nsIDOMEventListener)
-
-StaticRefPtr<VibrateWindowListener> gVibrateWindowListener;
-
-static bool
-MayVibrate(nsIDocument* doc) {
-  // Hidden documents cannot start or stop a vibration.
-  return (doc && !doc->Hidden());
-}
-
-NS_IMETHODIMP
-VibrateWindowListener::HandleEvent(nsIDOMEvent* aEvent)
-{
-  nsCOMPtr<nsIDocument> doc =
-    do_QueryInterface(aEvent->InternalDOMEvent()->GetTarget());
-
-  if (!MayVibrate(doc)) {
-    // It's important that we call CancelVibrate(), not Vibrate() with an
-    // empty list, because Vibrate() will fail if we're no longer focused, but
-    // CancelVibrate() will succeed, so long as nobody else has started a new
-    // vibration pattern.
-    nsCOMPtr<nsPIDOMWindowInner> window = do_QueryReferent(mWindow);
-    hal::CancelVibrate(window);
-    RemoveListener();
-    gVibrateWindowListener = nullptr;
-    // Careful: The line above might have deleted |this|!
-  }
-
-  return NS_OK;
-}
-
-void
-VibrateWindowListener::RemoveListener()
-{
-  nsCOMPtr<EventTarget> target = do_QueryReferent(mDocument);
-  if (!target) {
-    return;
-  }
-  NS_NAMED_LITERAL_STRING(visibilitychange, "visibilitychange");
-  target->RemoveSystemEventListener(visibilitychange, this,
-                                    true /* use capture */);
-}
-
-} // namespace
-
 void
 Navigator::AddIdleObserver(MozIdleObserver& aIdleObserver, ErrorResult& aRv)
 {
@@ -810,111 +724,6 @@ Navigator::RemoveIdleObserver(MozIdleObserver& aIdleObserver, ErrorResult& aRv)
   }
 }
 
-void
-Navigator::SetVibrationPermission(bool aPermitted, bool aPersistent)
-{
-  MOZ_ASSERT(NS_IsMainThread());
-
-  nsTArray<uint32_t> pattern;
-  pattern.SwapElements(mRequestedVibrationPattern);
-
-  if (!mWindow) {
-    return;
-  }
-
-  nsCOMPtr<nsIDocument> doc = mWindow->GetExtantDoc();
-
-  if (!MayVibrate(doc)) {
-    return;
-  }
-
-  if (aPermitted) {
-    // Add a listener to cancel the vibration if the document becomes hidden,
-    // and remove the old visibility listener, if there was one.
-    if (!gVibrateWindowListener) {
-      // If gVibrateWindowListener is null, this is the first time we've vibrated,
-      // and we need to register a listener to clear gVibrateWindowListener on
-      // shutdown.
-      ClearOnShutdown(&gVibrateWindowListener);
-    } else {
-      gVibrateWindowListener->RemoveListener();
-    }
-    gVibrateWindowListener = new VibrateWindowListener(mWindow, doc);
-    hal::Vibrate(pattern, mWindow);
-  }
-
-  if (aPersistent) {
-    AddPermission(doc->NodePrincipal(), kVibrationPermissionType,
-                  aPermitted ? nsIPermissionManager::ALLOW_ACTION :
-                               nsIPermissionManager::DENY_ACTION,
-                  nsIPermissionManager::EXPIRE_SESSION, 0);
-  }
-}
-
-bool
-Navigator::Vibrate(uint32_t aDuration)
-{
-  AutoTArray<uint32_t, 1> pattern;
-  pattern.AppendElement(aDuration);
-  return Vibrate(pattern);
-}
-
-bool
-Navigator::Vibrate(const nsTArray<uint32_t>& aPattern)
-{
-  MOZ_ASSERT(NS_IsMainThread());
-
-  if (!mWindow) {
-    return false;
-  }
-
-  nsCOMPtr<nsIDocument> doc = mWindow->GetExtantDoc();
-
-  if (!MayVibrate(doc)) {
-    return false;
-  }
-
-  nsTArray<uint32_t> pattern(aPattern);
-
-  if (pattern.Length() > sMaxVibrateListLen) {
-    pattern.SetLength(sMaxVibrateListLen);
-  }
-
-  for (size_t i = 0; i < pattern.Length(); ++i) {
-    pattern[i] = std::min(sMaxVibrateMS, pattern[i]);
-  }
-
-  // The spec says we check sVibratorEnabled after we've done the sanity
-  // checking on the pattern.
-  if (!sVibratorEnabled) {
-    return true;
-  }
-
-  mRequestedVibrationPattern.SwapElements(pattern);
-  uint32_t permission = GetPermission(mWindow, kVibrationPermissionType);
-
-  if (permission == nsIPermissionManager::ALLOW_ACTION ||
-      mRequestedVibrationPattern.IsEmpty() ||
-      (mRequestedVibrationPattern.Length() == 1 &&
-       mRequestedVibrationPattern[0] == 0)) {
-    // Always allow cancelling vibration and respect session permissions.
-    SetVibrationPermission(true /* permitted */, false /* persistent */);
-    return true;
-  }
-
-  nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
-  if (!obs || permission == nsIPermissionManager::DENY_ACTION) {
-    // Abort without observer service or on denied session permission.
-    SetVibrationPermission(false /* permitted */, false /* persistent */);
-    return true;
-  }
-
-  // Request user permission.
-  obs->NotifyObservers(ToSupports(this), "Vibration:Request", nullptr);
-
-  return true;
-}
-
 //*****************************************************************************
 //  Pointer Events interface
 //*****************************************************************************
diff --git a/dom/base/Navigator.h b/dom/base/Navigator.h
index bcc67589e..efecdbd0d 100644
--- a/dom/base/Navigator.h
+++ b/dom/base/Navigator.h
@@ -150,9 +150,6 @@ public:
   // NavigatorBinding::ClearCachedUserAgentValue(this);
   void ClearUserAgentCache();
 
-  bool Vibrate(uint32_t aDuration);
-  bool Vibrate(const nsTArray<uint32_t>& aDuration);
-  void SetVibrationPermission(bool aPermitted, bool aPersistent);
   uint32_t MaxTouchPoints();
   void GetAppCodeName(nsString& aAppCodeName, ErrorResult& aRv)
   {
diff --git a/dom/base/nsTreeSanitizer.cpp b/dom/base/nsTreeSanitizer.cpp
index 323c851c1..471956443 100644
--- a/dom/base/nsTreeSanitizer.cpp
+++ b/dom/base/nsTreeSanitizer.cpp
@@ -1385,6 +1385,8 @@ nsTreeSanitizer::SanitizeChildren(nsINode* aRoot)
         nsAutoString styleText;
         nsContentUtils::GetNodeTextContent(node, false, styleText);
 
+        RemoveAllAttributesFromDescendants(elt);
+        
         nsAutoString sanitizedStyle;
         nsCOMPtr<nsIURI> baseURI = node->GetBaseURI();
         if (SanitizeStyleSheet(styleText,
@@ -1480,6 +1482,17 @@ nsTreeSanitizer::RemoveAllAttributes(nsIContent* aElement)
   }
 }
 
+void nsTreeSanitizer::RemoveAllAttributesFromDescendants(mozilla::dom::Element* aElement) {
+  nsIContent* node = aElement->GetFirstChild();
+  while (node) {
+    if (node->IsElement()) {
+      mozilla::dom::Element* elt = node->AsElement();
+      RemoveAllAttributes(elt);
+    }
+    node = node->GetNextNode(aElement);
+  }
+}
+
 void
 nsTreeSanitizer::InitializeStatics()
 {
diff --git a/dom/base/nsTreeSanitizer.h b/dom/base/nsTreeSanitizer.h
index b8700d775..b4a333f61 100644
--- a/dom/base/nsTreeSanitizer.h
+++ b/dom/base/nsTreeSanitizer.h
@@ -184,6 +184,12 @@ class MOZ_STACK_CLASS nsTreeSanitizer {
     void RemoveAllAttributes(nsIContent* aElement);
 
     /**
+     * Removes all attributes from the descendants of an element but not from
+     * the element itself.
+     */
+    void RemoveAllAttributesFromDescendants(mozilla::dom::Element* aElement);
+
+    /**
      * The whitelist of HTML elements.
      */
     static nsTHashtable<nsISupportsHashKey>* sElementsHTML;
diff --git a/dom/tests/mochitest/general/mochitest.ini b/dom/tests/mochitest/general/mochitest.ini
index 9f2fad785..67c35f01a 100755
--- a/dom/tests/mochitest/general/mochitest.ini
+++ b/dom/tests/mochitest/general/mochitest.ini
@@ -122,7 +122,6 @@ run-if = e10s
 [test_storagePermissionsReject.html]
 [test_storagePermissionsRejectForeign.html]
 [test_stylesheetPI.html]
-[test_vibrator.html]
 [test_WebKitCSSMatrix.html]
 [test_windowedhistoryframes.html]
 [test_windowProperties.html]
diff --git a/dom/tests/mochitest/general/test_vibrator.html b/dom/tests/mochitest/general/test_vibrator.html
deleted file mode 100644
index 2874c783b..000000000
--- a/dom/tests/mochitest/general/test_vibrator.html
+++ /dev/null
@@ -1,93 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test for Vibrator</title>
-  <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
-  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
-</head>
-<body>
-
-<!-- Although we can't test that the vibrator works properly, we can test that
-     navigator.vibrate throws an exception where appropriate. -->
-
-<script class="testbody" type="text/javascript;version=1.7">
-SimpleTest.waitForExplicitFinish();
-var result;
-function expectFailure(param) {
-  result = navigator.vibrate(param);
-  is(result, false, 'vibrate(' + param + ') should have failed.');
-}
-
-function expectSuccess(param) {
-  result = navigator.vibrate(param);
-  is(result, true, 'vibrate(' + param + ') must succeed.');
-}
-
-function tests(aEnabled) {
-  // Some edge cases that the bindings should handle for us.
-  expectSuccess(null);
-  expectSuccess(undefined);
-  // -1 will be converted to the highest unsigned long then clamped.
-  expectSuccess(-1);
-  expectSuccess('a');
-  // -1 will be converted to the highest unsigned long then clamped.
-  expectSuccess([100, -1]);
-  expectSuccess([100, 'a']);
-
-  var maxVibrateMs = SpecialPowers.getIntPref('dom.vibrator.max_vibrate_ms');
-  var maxVibrateListLen = SpecialPowers.getIntPref('dom.vibrator.max_vibrate_list_len');
-
-  // If we pass a vibration pattern with a value higher than max_vibrate_ms or a
-  // pattern longer than max_vibrate_list_len, the call should succeed but the
-  // pattern should be modified to match the restrictions.
-
-  // Values will be clamped to dom.vibrator.max_vibrate_ms.
-  expectSuccess(maxVibrateMs + 1);
-  expectSuccess([maxVibrateMs + 1]);
-
-  var arr = [];
-  for (var i = 0; i < maxVibrateListLen + 1; i++) {
-    arr[i] = 0;
-  }
-  // The array will be truncated to have a length equal to dom.vibrator.max_vibrate_list_len.
-  expectSuccess(arr);
-
-
-  expectSuccess(0);
-  expectSuccess([]);
-  expectSuccess('1000');
-  expectSuccess(1000);
-  expectSuccess(1000.1);
-  expectSuccess([0, 0, 0]);
-  expectSuccess(['1000', 1000]);
-  expectSuccess([1000, 1000]);
-  expectSuccess([1000, 1000.1]);
-
-  // The following loop shouldn't cause us to crash.  See bug 701716.
-  for (var i = 0; i < 10000; i++) {
-    navigator.vibrate([100, 100]);
-  }
-  ok(true, "Didn't crash after issuing a lot of vibrate() calls.");
-  if(!aEnabled)
-    SimpleTest.finish();
-}
-
-SpecialPowers.pushPermissions([
-    {type: 'vibration', allow: true, context: document}
-  ], function() {
-    // Test with the vibrator pref enabled.
-    SpecialPowers.pushPrefEnv({"set": [['dom.vibrator.enabled', true]]}, function() {
-      tests(true);
-      SpecialPowers.pushPrefEnv({"set": [['dom.vibrator.enabled', false]]}, tests(false));
-    });
-    // Everything should be the same when the vibrator is disabled -- in
-    // particular, a disabled vibrator shouldn't eat failures we'd otherwise
-    // observe.
-  }
-);
-
-</script>
-</body>
-
-</html>
diff --git a/dom/webidl/Navigator.webidl b/dom/webidl/Navigator.webidl
index f34429de7..43d53cbac 100644
--- a/dom/webidl/Navigator.webidl
+++ b/dom/webidl/Navigator.webidl
@@ -13,9 +13,9 @@
  * http://www.w3.org/TR/beacon/#sec-beacon-method
  * https://html.spec.whatwg.org/#navigatorconcurrenthardware
  *
- * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
- * Opera Software ASA. You are granted a license to use, reproduce
- * and create derivative works of this document.
+ * © Copyright 2004-2020 Apple Computer, Inc., Mozilla Foundation,
+ * Opera Software ASA and Moonchild Productions. You are granted a license to use,
+ * reproduce and create derivative works of this document.
  */
 
 // http://www.whatwg.org/specs/web-apps/current-work/#the-navigator-object
@@ -124,14 +124,6 @@ interface NavigatorGeolocation {
 };
 Navigator implements NavigatorGeolocation;
 
-// http://www.w3.org/TR/vibration/#vibration-interface
-partial interface Navigator {
-    // We don't support sequences in unions yet
-    //boolean vibrate ((unsigned long or sequence<unsigned long>) pattern);
-    boolean vibrate(unsigned long duration);
-    boolean vibrate(sequence<unsigned long> pattern);
-};
-
 // http://www.w3.org/TR/pointerevents/#extensions-to-the-navigator-interface
 partial interface Navigator {
     [Pref="dom.w3c_pointer_events.enabled"]
@@ -140,17 +132,6 @@ partial interface Navigator {
 
 // Mozilla-specific extensions
 
-// Chrome-only interface for Vibration API permission handling.
-partial interface Navigator {
-    /* Set permission state to device vibration.
-     * @param permitted permission state (true for allowing vibration)
-     * @param persistent make the permission session-persistent
-     */
-    [ChromeOnly]
-    void setVibrationPermission(boolean permitted,
-                                optional boolean persistent = true);
-};
-
 callback interface MozIdleObserver {
   // Time is in seconds and is read only when idle observers are added
   // and removed.
diff --git a/gfx/2d/DrawTargetSkia.cpp b/gfx/2d/DrawTargetSkia.cpp
index 9eaac5674..7e71e54cc 100644
--- a/gfx/2d/DrawTargetSkia.cpp
+++ b/gfx/2d/DrawTargetSkia.cpp
@@ -212,7 +212,7 @@ VerifyRGBXCorners(uint8_t* aData, const IntSize &aSize, const int32_t aStride, S
 #endif
 
 static sk_sp<SkImage>
-GetSkImageForSurface(SourceSurface* aSurface)
+GetSkImageForSurface(SourceSurface* aSurface, Maybe<MutexAutoLock>* aLock)
 {
   if (!aSurface) {
     gfxDebug() << "Creating null Skia image from null SourceSurface";
@@ -220,7 +220,7 @@ GetSkImageForSurface(SourceSurface* aSurface)
   }
 
   if (aSurface->GetType() == SurfaceType::SKIA) {
-    return static_cast<SourceSurfaceSkia*>(aSurface)->GetImage();
+    return static_cast<SourceSurfaceSkia*>(aSurface)->GetImage(aLock);
   }
 
   DataSourceSurface* surf = aSurface->GetDataSurface().take();
@@ -390,9 +390,9 @@ ExtractAlphaBitmap(sk_sp<SkImage> aImage, SkBitmap* aResultBitmap)
 }
 
 static sk_sp<SkImage>
-ExtractAlphaForSurface(SourceSurface* aSurface)
+ExtractAlphaForSurface(SourceSurface* aSurface, Maybe<MutexAutoLock>& aLock)
 {
-  sk_sp<SkImage> image = GetSkImageForSurface(aSurface);
+  sk_sp<SkImage> image = GetSkImageForSurface(aSurface, &aLock);
   if (!image) {
     return nullptr;
   }
@@ -411,7 +411,11 @@ ExtractAlphaForSurface(SourceSurface* aSurface)
 }
 
 static void
-SetPaintPattern(SkPaint& aPaint, const Pattern& aPattern, Float aAlpha = 1.0, Point aOffset = Point(0, 0))
+SetPaintPattern(SkPaint& aPaint,
+                const Pattern& aPattern,
+                Maybe<MutexAutoLock>& aLock,
+                Float aAlpha = 1.0,
+                Point aOffset = Point(0, 0))
 {
   switch (aPattern.GetType()) {
     case PatternType::COLOR: {
@@ -473,7 +477,7 @@ SetPaintPattern(SkPaint& aPaint, const Pattern& aPattern, Float aAlpha = 1.0, Po
     }
     case PatternType::SURFACE: {
       const SurfacePattern& pat = static_cast<const SurfacePattern&>(aPattern);
-      sk_sp<SkImage> image = GetSkImageForSurface(pat.mSurface);
+      sk_sp<SkImage> image = GetSkImageForSurface(pat.mSurface, &aLock);
       if (!image) {
         aPaint.setColor(SK_ColorTRANSPARENT);
         break;
@@ -525,7 +529,7 @@ struct AutoPaintSetup {
     : mNeedsRestore(false), mAlpha(1.0)
   {
     Init(aCanvas, aOptions, aMaskBounds, false);
-    SetPaintPattern(mPaint, aPattern, mAlpha, aOffset);
+    SetPaintPattern(mPaint, aPattern, mLock, mAlpha, aOffset);
   }
 
   AutoPaintSetup(SkCanvas *aCanvas, const DrawOptions& aOptions, const Rect* aMaskBounds = nullptr, bool aForceGroup = false)
@@ -579,6 +583,7 @@ struct AutoPaintSetup {
   SkPaint mPaint;
   bool mNeedsRestore;
   SkCanvas* mCanvas;
+  Maybe<MutexAutoLock> mLock;
   Float mAlpha;
 };
 
@@ -601,7 +606,8 @@ DrawTargetSkia::DrawSurface(SourceSurface *aSurface,
 
   MarkChanged();
 
-  sk_sp<SkImage> image = GetSkImageForSurface(aSurface);
+  Maybe<MutexAutoLock> lock;
+  sk_sp<SkImage> image = GetSkImageForSurface(aSurface, &lock);
   if (!image) {
     return;
   }
@@ -654,7 +660,8 @@ DrawTargetSkia::DrawSurfaceWithShadow(SourceSurface *aSurface,
 
   MarkChanged();
 
-  sk_sp<SkImage> image = GetSkImageForSurface(aSurface);
+  Maybe<MutexAutoLock> lock;
+  sk_sp<SkImage> image = GetSkImageForSurface(aSurface, &lock);
   if (!image) {
     return;
   }
@@ -1407,8 +1414,9 @@ DrawTargetSkia::Mask(const Pattern &aSource,
   MarkChanged();
   AutoPaintSetup paint(mCanvas.get(), aOptions, aSource);
 
+  Maybe<MutexAutoLock> lock;
   SkPaint maskPaint;
-  SetPaintPattern(maskPaint, aMask);
+  SetPaintPattern(maskPaint, aMask, lock);
 
   SkLayerRasterizer::Builder builder;
   builder.addLayer(maskPaint);
@@ -1427,7 +1435,8 @@ DrawTargetSkia::MaskSurface(const Pattern &aSource,
   MarkChanged();
   AutoPaintSetup paint(mCanvas.get(), aOptions, aSource, nullptr, -aOffset);
 
-  sk_sp<SkImage> alphaMask = ExtractAlphaForSurface(aMask);
+  Maybe<MutexAutoLock> lock;
+  sk_sp<SkImage> alphaMask = ExtractAlphaForSurface(aMask, lock);
   if (!alphaMask) {
     gfxDebug() << *this << ": MaskSurface() failed to extract alpha for mask";
     return;
@@ -1456,7 +1465,8 @@ DrawTarget::Draw3DTransformedSurface(SourceSurface* aSurface, const Matrix4x4& a
   fullMat.PostTranslate(-xformBounds.x, -xformBounds.y, 0);
 
   // Read in the source data.
-  sk_sp<SkImage> srcImage = GetSkImageForSurface(aSurface);
+  Maybe<MutexAutoLock> lock;
+  sk_sp<SkImage> srcImage = GetSkImageForSurface(aSurface, &lock);
   if (!srcImage) {
     return true;
   }
@@ -1515,7 +1525,8 @@ DrawTargetSkia::Draw3DTransformedSurface(SourceSurface* aSurface, const Matrix4x
 
   MarkChanged();
 
-  sk_sp<SkImage> image = GetSkImageForSurface(aSurface);
+  Maybe<MutexAutoLock> lock;
+  sk_sp<SkImage> image = GetSkImageForSurface(aSurface, &lock);
   if (!image) {
     return true;
   }
@@ -1599,7 +1610,8 @@ already_AddRefed<SourceSurface>
 DrawTargetSkia::OptimizeGPUSourceSurface(SourceSurface *aSurface) const
 {
   // Check if the underlying SkImage already has an associated GrTexture.
-  sk_sp<SkImage> image = GetSkImageForSurface(aSurface);
+  Maybe<MutexAutoLock> lock;
+  sk_sp<SkImage> image = GetSkImageForSurface(aSurface, &lock);
   if (!image || image->isTextureBacked()) {
     RefPtr<SourceSurface> surface(aSurface);
     return surface.forget();
@@ -1716,7 +1728,8 @@ DrawTargetSkia::CopySurface(SourceSurface *aSurface,
 {
   MarkChanged();
 
-  sk_sp<SkImage> image = GetSkImageForSurface(aSurface);
+  Maybe<MutexAutoLock> lock;
+  sk_sp<SkImage> image = GetSkImageForSurface(aSurface, &lock);
   if (!image) {
     return;
   }
@@ -2061,7 +2074,8 @@ DrawTargetSkia::PopLayer()
         paint.setColor(SK_ColorTRANSPARENT);
       }
 
-      sk_sp<SkImage> alphaMask = ExtractAlphaForSurface(layer.mMask);
+      Maybe<MutexAutoLock> lock;
+      sk_sp<SkImage> alphaMask = ExtractAlphaForSurface(layer.mMask, lock);
       if (!alphaMask) {
         gfxDebug() << *this << ": PopLayer() failed to extract alpha for mask";
       } else {
diff --git a/gfx/2d/SourceSurfaceSkia.cpp b/gfx/2d/SourceSurfaceSkia.cpp
index 14cbf6a84..0738f3d39 100644
--- a/gfx/2d/SourceSurfaceSkia.cpp
+++ b/gfx/2d/SourceSurfaceSkia.cpp
@@ -40,6 +40,25 @@ SourceSurfaceSkia::GetFormat() const
   return mFormat;
 }
 
+sk_sp<SkImage>
+SourceSurfaceSkia::GetImage(Maybe<MutexAutoLock>* aLock) {
+  // If we were provided a lock object, we can let the caller access
+  // a shared SkImage and we know it won't go away while the lock is held.
+  if (aLock) {
+    // We are locked, so now we can check mDrawTarget.
+    // If it's null, then we're not shared and we can unlock eagerly.
+    if (!mDrawTarget) {
+      aLock->reset();
+    }
+  } else {
+    // Otherwise we need to call DrawTargetWillChange to ensure we have our
+    // own copy of the SkImage.
+    DrawTargetWillChange();
+  }
+  sk_sp<SkImage> image = mImage;
+  return image;
+}
+  
 static sk_sp<SkData>
 MakeSkData(unsigned char* aData, const IntSize& aSize, int32_t aStride)
 {
diff --git a/gfx/2d/SourceSurfaceSkia.h b/gfx/2d/SourceSurfaceSkia.h
index a91ae93ed..ffb8e47bf 100644
--- a/gfx/2d/SourceSurfaceSkia.h
+++ b/gfx/2d/SourceSurfaceSkia.h
@@ -10,6 +10,10 @@
 #include <vector>
 #include "skia/include/core/SkCanvas.h"
 #include "skia/include/core/SkImage.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/Mutex.h"
+
+typedef mozilla::MutexAutoLock MutexAutoLock;
 
 namespace mozilla {
 
@@ -28,7 +32,7 @@ public:
   virtual IntSize GetSize() const;
   virtual SurfaceFormat GetFormat() const;
 
-  sk_sp<SkImage>& GetImage() { return mImage; }
+  sk_sp<SkImage> GetImage(Maybe<MutexAutoLock>* aLock);
 
   bool InitFromData(unsigned char* aData,
                     const IntSize &aSize,
diff --git a/hal/Hal.cpp b/hal/Hal.cpp
index 981f49125..bd5ba9189 100644
--- a/hal/Hal.cpp
+++ b/hal/Hal.cpp
@@ -95,87 +95,8 @@ WindowIsActive(nsPIDOMWindowInner* aWindow)
   return !document->Hidden();
 }
 
-StaticAutoPtr<WindowIdentifier::IDArrayType> gLastIDToVibrate;
-
-void InitLastIDToVibrate()
-{
-  gLastIDToVibrate = new WindowIdentifier::IDArrayType();
-  ClearOnShutdown(&gLastIDToVibrate);
-}
-
 } // namespace
 
-void
-Vibrate(const nsTArray<uint32_t>& pattern, nsPIDOMWindowInner* window)
-{
-  Vibrate(pattern, WindowIdentifier(window));
-}
-
-void
-Vibrate(const nsTArray<uint32_t>& pattern, const WindowIdentifier &id)
-{
-  AssertMainThread();
-
-  // Only active windows may start vibrations.  If |id| hasn't gone
-  // through the IPC layer -- that is, if our caller is the outside
-  // world, not hal_proxy -- check whether the window is active.  If
-  // |id| has gone through IPC, don't check the window's visibility;
-  // only the window corresponding to the bottommost process has its
-  // visibility state set correctly.
-  if (!id.HasTraveledThroughIPC() && !WindowIsActive(id.GetWindow())) {
-    HAL_LOG("Vibrate: Window is inactive, dropping vibrate.");
-    return;
-  }
-
-  if (!InSandbox()) {
-    if (!gLastIDToVibrate) {
-      InitLastIDToVibrate();
-    }
-    *gLastIDToVibrate = id.AsArray();
-  }
-
-  // Don't forward our ID if we are not in the sandbox, because hal_impl
-  // doesn't need it, and we don't want it to be tempted to read it.  The
-  // empty identifier will assert if it's used.
-  PROXY_IF_SANDBOXED(Vibrate(pattern, InSandbox() ? id : WindowIdentifier()));
-}
-
-void
-CancelVibrate(nsPIDOMWindowInner* window)
-{
-  CancelVibrate(WindowIdentifier(window));
-}
-
-void
-CancelVibrate(const WindowIdentifier &id)
-{
-  AssertMainThread();
-
-  // Although only active windows may start vibrations, a window may
-  // cancel its own vibration even if it's no longer active.
-  //
-  // After a window is marked as inactive, it sends a CancelVibrate
-  // request.  We want this request to cancel a playing vibration
-  // started by that window, so we certainly don't want to reject the
-  // cancellation request because the window is now inactive.
-  //
-  // But it could be the case that, after this window became inactive,
-  // some other window came along and started a vibration.  We don't
-  // want this window's cancellation request to cancel that window's
-  // actively-playing vibration!
-  //
-  // To solve this problem, we keep track of the id of the last window
-  // to start a vibration, and only accepts cancellation requests from
-  // the same window.  All other cancellation requests are ignored.
-
-  if (InSandbox() || (gLastIDToVibrate && *gLastIDToVibrate == id.AsArray())) {
-    // Don't forward our ID if we are not in the sandbox, because hal_impl
-    // doesn't need it, and we don't want it to be tempted to read it.  The
-    // empty identifier will assert if it's used.
-    PROXY_IF_SANDBOXED(CancelVibrate(InSandbox() ? id : WindowIdentifier()));
-  }
-}
-
 template <class InfoType>
 class ObserversManager
 {
diff --git a/hal/Hal.h b/hal/Hal.h
index 53c9e68bb..45667ddca 100644
--- a/hal/Hal.h
+++ b/hal/Hal.h
@@ -52,41 +52,6 @@ typedef Observer<SystemTimezoneChangeInformation> SystemTimezoneChangeObserver;
 namespace MOZ_HAL_NAMESPACE {
 
 /**
- * Turn the default vibrator device on/off per the pattern specified
- * by |pattern|.  Each element in the pattern is the number of
- * milliseconds to turn the vibrator on or off.  The first element in
- * |pattern| is an "on" element, the next is "off", and so on.
- *
- * If |pattern| is empty, any in-progress vibration is canceled.
- *
- * Only an active window within an active tab may call Vibrate; calls
- * from inactive windows and windows on inactive tabs do nothing.
- *
- * If you're calling hal::Vibrate from the outside world, pass an
- * nsIDOMWindow* in place of the WindowIdentifier parameter.
- * The method with WindowIdentifier will be called automatically.
- */
-void Vibrate(const nsTArray<uint32_t>& pattern,
-             nsPIDOMWindowInner* aWindow);
-void Vibrate(const nsTArray<uint32_t>& pattern,
-             const hal::WindowIdentifier &id);
-
-/**
- * Cancel a vibration started by the content window identified by
- * WindowIdentifier.
- *
- * If the window was the last window to start a vibration, the
- * cancellation request will go through even if the window is not
- * active.
- *
- * As with hal::Vibrate(), if you're calling hal::CancelVibrate from the outside
- * world, pass an nsIDOMWindow*. The method with WindowIdentifier will be called
- * automatically.
- */
-void CancelVibrate(nsPIDOMWindowInner* aWindow);
-void CancelVibrate(const hal::WindowIdentifier &id);
-
-/**
  * Determine whether the device's screen is currently enabled.
  */
 bool GetScreenEnabled();
diff --git a/hal/fallback/FallbackVibration.cpp b/hal/fallback/FallbackVibration.cpp
deleted file mode 100644
index ffabe9efe..000000000
--- a/hal/fallback/FallbackVibration.cpp
+++ /dev/null
@@ -1,23 +0,0 @@
-/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* vim: set sw=2 ts=8 et ft=cpp : */
-/* 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 "Hal.h"
-
-using mozilla::hal::WindowIdentifier;
-
-namespace mozilla {
-namespace hal_impl {
-
-void
-Vibrate(const nsTArray<uint32_t>& pattern, const hal::WindowIdentifier &)
-{}
-
-void
-CancelVibrate(const hal::WindowIdentifier &)
-{}
-
-} // namespace hal_impl
-} // namespace mozilla
diff --git a/hal/moz.build b/hal/moz.build
index d817e4a01..15b0d6b1e 100644
--- a/hal/moz.build
+++ b/hal/moz.build
@@ -30,7 +30,6 @@ if CONFIG['OS_TARGET'] == 'Linux':
         'fallback/FallbackAlarm.cpp',
         'fallback/FallbackScreenConfiguration.cpp',
         'fallback/FallbackSensor.cpp',
-        'fallback/FallbackVibration.cpp',
         'linux/LinuxMemory.cpp',
         'linux/LinuxPower.cpp',
     ]
@@ -40,7 +39,6 @@ elif CONFIG['OS_TARGET'] == 'WINNT':
         'fallback/FallbackMemory.cpp',
         'fallback/FallbackPower.cpp',
         'fallback/FallbackScreenConfiguration.cpp',
-        'fallback/FallbackVibration.cpp',
         'windows/WindowsSensor.cpp',
     ]
 elif CONFIG['MOZ_WIDGET_TOOLKIT'] == 'cocoa':
@@ -49,7 +47,6 @@ elif CONFIG['MOZ_WIDGET_TOOLKIT'] == 'cocoa':
         'fallback/FallbackMemory.cpp',
         'fallback/FallbackPower.cpp',
         'fallback/FallbackScreenConfiguration.cpp',
-        'fallback/FallbackVibration.cpp',
     ]
 elif CONFIG['OS_TARGET'] in ('OpenBSD', 'NetBSD', 'FreeBSD', 'DragonFly'):
     UNIFIED_SOURCES += [
@@ -58,7 +55,6 @@ elif CONFIG['OS_TARGET'] in ('OpenBSD', 'NetBSD', 'FreeBSD', 'DragonFly'):
         'fallback/FallbackPower.cpp',
         'fallback/FallbackScreenConfiguration.cpp',
         'fallback/FallbackSensor.cpp',
-        'fallback/FallbackVibration.cpp',
     ]
 else:
     UNIFIED_SOURCES += [
@@ -67,7 +63,6 @@ else:
         'fallback/FallbackPower.cpp',
         'fallback/FallbackScreenConfiguration.cpp',
         'fallback/FallbackSensor.cpp',
-        'fallback/FallbackVibration.cpp',
     ]
 
 UNIFIED_SOURCES += [
diff --git a/hal/sandbox/PHal.ipdl b/hal/sandbox/PHal.ipdl
index 8701e1219..0dc2bbf77 100644
--- a/hal/sandbox/PHal.ipdl
+++ b/hal/sandbox/PHal.ipdl
@@ -70,9 +70,6 @@ child:
     async NotifySystemTimezoneChange(SystemTimezoneChangeInformation aSystemTimezoneChangeInfo); 
 
 parent:
-    async Vibrate(uint32_t[] pattern, uint64_t[] id, PBrowser browser);
-    async CancelVibrate(uint64_t[] id, PBrowser browser);
-
     async EnableNetworkNotifications();
     async DisableNetworkNotifications();
     sync GetCurrentNetworkInformation()
diff --git a/hal/sandbox/SandboxHal.cpp b/hal/sandbox/SandboxHal.cpp
index 579f3b472..28f15b4cc 100644
--- a/hal/sandbox/SandboxHal.cpp
+++ b/hal/sandbox/SandboxHal.cpp
@@ -47,28 +47,6 @@ Hal()
 }
 
 void
-Vibrate(const nsTArray<uint32_t>& pattern, const WindowIdentifier &id)
-{
-  HAL_LOG("Vibrate: Sending to parent process.");
-
-  AutoTArray<uint32_t, 8> p(pattern);
-
-  WindowIdentifier newID(id);
-  newID.AppendProcessID();
-  Hal()->SendVibrate(p, newID.AsArray(), TabChild::GetFrom(newID.GetWindow()));
-}
-
-void
-CancelVibrate(const WindowIdentifier &id)
-{
-  HAL_LOG("CancelVibrate: Sending to parent process.");
-
-  WindowIdentifier newID(id);
-  newID.AppendProcessID();
-  Hal()->SendCancelVibrate(newID.AsArray(), TabChild::GetFrom(newID.GetWindow()));
-}
-
-void
 EnableNetworkNotifications()
 {
   Hal()->SendEnableNetworkNotifications();
@@ -381,36 +359,6 @@ public:
   }
 
   virtual bool
-  RecvVibrate(InfallibleTArray<unsigned int>&& pattern,
-              InfallibleTArray<uint64_t>&& id,
-              PBrowserParent *browserParent) override
-  {
-    // We give all content vibration permission.
-    //    TabParent *tabParent = TabParent::GetFrom(browserParent);
-    /* xxxkhuey wtf
-    nsCOMPtr<nsIDOMWindow> window =
-      do_QueryInterface(tabParent->GetBrowserDOMWindow());
-    */
-    WindowIdentifier newID(id, nullptr);
-    hal::Vibrate(pattern, newID);
-    return true;
-  }
-
-  virtual bool
-  RecvCancelVibrate(InfallibleTArray<uint64_t> &&id,
-                    PBrowserParent *browserParent) override
-  {
-    //TabParent *tabParent = TabParent::GetFrom(browserParent);
-    /* XXXkhuey wtf
-    nsCOMPtr<nsIDOMWindow> window =
-      tabParent->GetBrowserDOMWindow();
-    */
-    WindowIdentifier newID(id, nullptr);
-    hal::CancelVibrate(newID);
-    return true;
-  }
-
-  virtual bool
   RecvEnableNetworkNotifications() override {
     // We give all content access to this network-status information.
     hal::RegisterNetworkObserver(this);
diff --git a/js/src/gc/Heap.h b/js/src/gc/Heap.h
index 697803380..7f2c5fb4f 100644
--- a/js/src/gc/Heap.h
+++ b/js/src/gc/Heap.h
@@ -29,6 +29,7 @@
 #include "js/HeapAPI.h"
 #include "js/RootingAPI.h"
 #include "js/TracingAPI.h"
+#include "js/TraceKind.h"
 
 struct JSRuntime;
 
@@ -273,6 +274,23 @@ struct Cell
 
     static MOZ_ALWAYS_INLINE bool needWriteBarrierPre(JS::Zone* zone);
 
+    template <class T>
+    inline bool is() const {
+        return getTraceKind() == JS::MapTypeToTraceKind<T>::kind;
+    }
+
+    template<class T>
+    inline T* as() {
+        MOZ_ASSERT(is<T>());
+        return static_cast<T*>(this);
+    }
+
+    template <class T>
+    inline const T* as() const {
+        MOZ_ASSERT(is<T>());
+        return static_cast<const T*>(this);
+    }
+
 #ifdef DEBUG
     inline bool isAligned() const;
     void dump(FILE* fp) const;
diff --git a/js/src/jsapi.cpp b/js/src/jsapi.cpp
index c0f0e61cc..cd370e42c 100644
--- a/js/src/jsapi.cpp
+++ b/js/src/jsapi.cpp
@@ -7040,7 +7040,9 @@ JS::CaptureCurrentStack(JSContext* cx, JS::MutableHandleObject stackp,
 {
     AssertHeapIsIdle(cx);
     CHECK_REQUEST(cx);
-    MOZ_RELEASE_ASSERT(cx->compartment());
+    if (!cx->compartment()) {
+      return false;
+    }
 
     JSCompartment* compartment = cx->compartment();
     Rooted<SavedFrame*> frame(cx);
diff --git a/layout/generic/nsTextFrame.cpp b/layout/generic/nsTextFrame.cpp
index c7b55961c..a93c71b28 100644
--- a/layout/generic/nsTextFrame.cpp
+++ b/layout/generic/nsTextFrame.cpp
@@ -1718,6 +1718,16 @@ GetSpaceWidthAppUnits(const gfxTextRun* aTextRun)
   return spaceWidthAppUnits;
 }
 
+static gfxFloat
+GetMinTabAdvanceAppUnits(const gfxTextRun* aTextRun)
+{
+  gfxFloat chWidthAppUnits =
+    NS_round(GetFirstFontMetrics(aTextRun->GetFontGroup(),
+			         aTextRun->IsVertical()).zeroOrAveCharWidth *
+	     aTextRun->GetAppUnitsPerDevUnit());
+  return 0.5 * chWidthAppUnits;
+}
+
 static nscoord
 LetterSpacing(nsIFrame* aFrame, const nsStyleText* aStyleText = nullptr)
 {
@@ -3092,6 +3102,7 @@ public:
       mLength(aLength),
       mWordSpacing(WordSpacing(aFrame, mTextRun, aTextStyle)),
       mLetterSpacing(LetterSpacing(aFrame, aTextStyle)),
+      mMinTabAdvance(-1.0),
       mHyphenWidth(-1),
       mOffsetFromBlockOriginForTabs(aOffsetFromBlockOriginForTabs),
       mReflowing(true),
@@ -3116,6 +3127,7 @@ public:
       mLength(aFrame->GetContentLength()),
       mWordSpacing(WordSpacing(aFrame, mTextRun)),
       mLetterSpacing(LetterSpacing(aFrame)),
+      mMinTabAdvance(-1.0),
       mHyphenWidth(-1),
       mOffsetFromBlockOriginForTabs(0),
       mReflowing(false),
@@ -3178,7 +3190,14 @@ public:
     return mFontMetrics;
   }
 
-  void CalcTabWidths(Range aTransformedRange);
+  void CalcTabWidths(Range aTransformedRange, gfxFloat aTabWidth);
+
+  gfxFloat MinTabAdvance() {
+    if (mMinTabAdvance < 0.0) {
+      mMinTabAdvance = GetMinTabAdvanceAppUnits(mTextRun);
+    }
+    return mMinTabAdvance;
+  }
 
   const gfxSkipCharsIterator& GetEndHint() { return mTempIterator; }
 
@@ -3212,6 +3231,7 @@ protected:
   int32_t               mLength; // DOM string length, may be INT32_MAX
   gfxFloat              mWordSpacing;     // space for each whitespace char
   gfxFloat              mLetterSpacing;   // space for each letter
+  gfxFloat		mMinTabAdvance; // min advance for <tab> char
   gfxFloat              mHyphenWidth;
   gfxFloat              mOffsetFromBlockOriginForTabs;
 
@@ -3364,6 +3384,28 @@ CanAddSpacingAfter(const gfxTextRun* aTextRun, uint32_t aOffset)
     aTextRun->IsLigatureGroupStart(aOffset + 1);
 }
 
+static gfxFloat
+ComputeTabWidthAppUnits(nsIFrame* aFrame, gfxTextRun* aTextRun)
+{
+  const nsStyleText* textStyle = aFrame->StyleText();
+  if (textStyle->mTabSize.GetUnit() != eStyleUnit_Factor) {
+    nscoord w = textStyle->mTabSize.GetCoordValue();
+    MOZ_ASSERT(w >= 0);
+    return w;
+  }
+
+  gfxFloat spaces = textStyle->mTabSize.GetFactorValue();
+  MOZ_ASSERT(spaces >= 0);
+
+  // Round the space width when converting to appunits the same way
+  // textruns do.
+  gfxFloat spaceWidthAppUnits =
+    NS_round(GetFirstFontMetrics(aTextRun->GetFontGroup(),
+                                 aTextRun->IsVertical()).spaceWidth *
+             aTextRun->GetAppUnitsPerDevUnit());
+  return spaces * spaceWidthAppUnits;
+}
+
 void
 PropertyProvider::GetSpacingInternal(Range aRange, Spacing* aSpacing,
                                      bool aIgnoreTabs)
@@ -3411,17 +3453,16 @@ PropertyProvider::GetSpacingInternal(Range aRange, Spacing* aSpacing,
     }
   }
 
-  // Ignore tab spacing rather than computing it, if the tab size is 0
-  if (!aIgnoreTabs)
-    aIgnoreTabs = mFrame->StyleText()->mTabSize == 0;
-
   // Now add tab spacing, if there is any
   if (!aIgnoreTabs) {
-    CalcTabWidths(aRange);
-    if (mTabWidths) {
-      mTabWidths->ApplySpacing(aSpacing,
-                               aRange.start - mStart.GetSkippedOffset(),
-                               aRange.Length());
+    gfxFloat tabWidth = ComputeTabWidthAppUnits(mFrame, mTextRun);
+    if (tabWidth > 0) {
+      CalcTabWidths(aRange, tabWidth);
+      if (mTabWidths) {
+        mTabWidths->ApplySpacing(aSpacing,
+                                 aRange.start - mStart.GetSkippedOffset(),
+                                 aRange.Length());
+      }
     }
   }
 
@@ -3444,33 +3485,22 @@ PropertyProvider::GetSpacingInternal(Range aRange, Spacing* aSpacing,
   }
 }
 
-static gfxFloat
-ComputeTabWidthAppUnits(nsIFrame* aFrame, const gfxTextRun* aTextRun)
-{
-  // Get the number of spaces from CSS -moz-tab-size
-  const nsStyleText* textStyle = aFrame->StyleText();
-
-  return textStyle->mTabSize * GetSpaceWidthAppUnits(aTextRun);
-}
-
 // aX and the result are in whole appunits.
 static gfxFloat
-AdvanceToNextTab(gfxFloat aX, nsIFrame* aFrame,
-                 const gfxTextRun* aTextRun, gfxFloat* aCachedTabWidth)
+AdvanceToNextTab(gfxFloat aX, nsIFrame* aFrame, gfxTextRun* aTextRun,
+	         gfxFloat aTabWidth, gfxFloat aMinAdvance)
 {
-  if (*aCachedTabWidth < 0) {
-    *aCachedTabWidth = ComputeTabWidthAppUnits(aFrame, aTextRun);
-  }
 
-  // Advance aX to the next multiple of *aCachedTabWidth. We must advance
-  // by at least 1 appunit.
-  // XXX should we make this 1 CSS pixel?
-  return ceil((aX + 1)/(*aCachedTabWidth))*(*aCachedTabWidth);
+  // Advance aX to the next multiple of aTabWidth. We must advance
+  // by at least aMinAdvance.
+  return ceil((aX + aMinAdvance) / aTabWidth) * aTabWidth;
 }
 
 void
-PropertyProvider::CalcTabWidths(Range aRange)
+PropertyProvider::CalcTabWidths(Range aRange, gfxFloat aTabWidth)
 {
+  MOZ_ASSERT(aTabWidth > 0);
+
   if (!mTabWidths) {
     if (mReflowing && !mLineContainer) {
       // Intrinsic width computation does its own tab processing. We
@@ -3505,7 +3535,6 @@ PropertyProvider::CalcTabWidths(Range aRange)
     NS_ASSERTION(mReflowing,
                  "We need precomputed tab widths, but don't have enough.");
 
-    gfxFloat tabWidth = -1;
     for (uint32_t i = tabsEnd; i < aRange.end; ++i) {
       Spacing spacing;
       GetSpacingInternal(Range(i, i + 1), &spacing, true);
@@ -3527,7 +3556,7 @@ PropertyProvider::CalcTabWidths(Range aRange)
           mFrame->SetProperty(TabWidthProperty(), mTabWidths);
         }
         double nextTab = AdvanceToNextTab(mOffsetFromBlockOriginForTabs,
-                mFrame, mTextRun, &tabWidth);
+	        mFrame, mTextRun, aTabWidth, MinTabAdvance());
         mTabWidths->mWidths.AppendElement(TabWidth(i - startOffset, 
                 NSToIntRound(nextTab - mOffsetFromBlockOriginForTabs)));
         mOffsetFromBlockOriginForTabs = nextTab;
@@ -8321,9 +8350,12 @@ nsTextFrame::AddInlineMinISizeForFlow(nsRenderingContext *aRenderingContext,
       PropertyProvider::Spacing spacing;
       provider.GetSpacing(Range(i, i + 1), &spacing);
       aData->mCurrentLine += nscoord(spacing.mBefore);
+      if (tabWidth < 0) {
+	tabWidth = ComputeTabWidthAppUnits(this, textRun);
+      }
       gfxFloat afterTab =
-        AdvanceToNextTab(aData->mCurrentLine, this,
-                         textRun, &tabWidth);
+        AdvanceToNextTab(aData->mCurrentLine, this, textRun, tabWidth,
+			 provider.MinTabAdvance());
       aData->mCurrentLine = nscoord(afterTab + spacing.mAfter);
       wordStart = i + 1;
     } else if (i < flowEndInTextRun ||
@@ -8480,9 +8512,12 @@ nsTextFrame::AddInlinePrefISizeForFlow(nsRenderingContext *aRenderingContext,
       PropertyProvider::Spacing spacing;
       provider.GetSpacing(Range(i, i + 1), &spacing);
       aData->mCurrentLine += nscoord(spacing.mBefore);
+      if (tabWidth < 0) {
+	tabWidth = ComputeTabWidthAppUnits(this, textRun);
+      }
       gfxFloat afterTab =
-        AdvanceToNextTab(aData->mCurrentLine, this,
-                         textRun, &tabWidth);
+        AdvanceToNextTab(aData->mCurrentLine, this, textRun, tabWidth,
+			 provider.MinTabAdvance());
       aData->mCurrentLine = nscoord(afterTab + spacing.mAfter);
       lineStart = i + 1;
     } else if (preformattedNewline) {
diff --git a/layout/style/nsCSSPropAliasList.h b/layout/style/nsCSSPropAliasList.h
index 9ec71b2cf..334f3b1ac 100644
--- a/layout/style/nsCSSPropAliasList.h
+++ b/layout/style/nsCSSPropAliasList.h
@@ -223,6 +223,10 @@ CSS_PROP_ALIAS(-moz-columns,
                columns,
                MozColumns,
                "")
+CSS_PROP_ALIAS(-moz-tab-size,
+	       tab_size,
+	       MozTabSize,
+	       "")
 
 #define WEBKIT_PREFIX_PREF "layout.css.prefixes.webkit"
 
diff --git a/layout/style/nsCSSPropList.h b/layout/style/nsCSSPropList.h
index 4f79db5a5..658ea68d7 100644
--- a/layout/style/nsCSSPropList.h
+++ b/layout/style/nsCSSPropList.h
@@ -3879,16 +3879,16 @@ CSS_PROP_FONT(
     eStyleAnimType_None)
 #endif // CSS_PROP_LIST_EXCLUDE_INTERNAL
 CSS_PROP_TEXT(
-    -moz-tab-size,
-    _moz_tab_size,
-    CSS_PROP_DOMPROP_PREFIXED(TabSize),
+    tab-size,
+    tab_size,
+    TabSize,
     CSS_PROPERTY_PARSE_VALUE |
         CSS_PROPERTY_VALUE_NONNEGATIVE,
     "",
-    VARIANT_HI,
+    VARIANT_INHERIT | VARIANT_LNCALC,
     nullptr,
     offsetof(nsStyleText, mTabSize),
-    eStyleAnimType_Discrete)
+    eStyleAnimType_Coord)
 CSS_PROP_TABLE(
     table-layout,
     table_layout,
diff --git a/layout/style/nsComputedDOMStyle.cpp b/layout/style/nsComputedDOMStyle.cpp
index 08c2846f7..bbad9c371 100644
--- a/layout/style/nsComputedDOMStyle.cpp
+++ b/layout/style/nsComputedDOMStyle.cpp
@@ -3972,7 +3972,7 @@ already_AddRefed<CSSValue>
 nsComputedDOMStyle::DoGetTabSize()
 {
   RefPtr<nsROCSSPrimitiveValue> val = new nsROCSSPrimitiveValue;
-  val->SetNumber(StyleText()->mTabSize);
+  SetValueToCoord(val, StyleText()->mTabSize, true);
   return val.forget();
 }
 
diff --git a/layout/style/nsComputedDOMStylePropertyList.h b/layout/style/nsComputedDOMStylePropertyList.h
index 8d4d8e45e..6a18a7ad0 100644
--- a/layout/style/nsComputedDOMStylePropertyList.h
+++ b/layout/style/nsComputedDOMStylePropertyList.h
@@ -228,6 +228,7 @@ COMPUTED_STYLE_PROP(scroll_snap_type_x,            ScrollSnapTypeX)
 COMPUTED_STYLE_PROP(scroll_snap_type_y,            ScrollSnapTypeY)
 COMPUTED_STYLE_PROP(shape_outside,                 ShapeOutside)
 //// COMPUTED_STYLE_PROP(size,                     Size)
+COMPUTED_STYLE_PROP(tab_size,			   TabSize)
 COMPUTED_STYLE_PROP(table_layout,                  TableLayout)
 COMPUTED_STYLE_PROP(text_align,                    TextAlign)
 COMPUTED_STYLE_PROP(text_align_last,               TextAlignLast)
@@ -295,7 +296,6 @@ COMPUTED_STYLE_PROP(_moz_outline_radius_bottomRight,OutlineRadiusBottomRight)
 COMPUTED_STYLE_PROP(_moz_outline_radius_topLeft,    OutlineRadiusTopLeft)
 COMPUTED_STYLE_PROP(_moz_outline_radius_topRight,   OutlineRadiusTopRight)
 COMPUTED_STYLE_PROP(stack_sizing,                  StackSizing)
-COMPUTED_STYLE_PROP(_moz_tab_size,                 TabSize)
 COMPUTED_STYLE_PROP(text_size_adjust,              TextSizeAdjust)
 COMPUTED_STYLE_PROP(user_focus,                    UserFocus)
 COMPUTED_STYLE_PROP(user_input,                    UserInput)
diff --git a/layout/style/nsRuleNode.cpp b/layout/style/nsRuleNode.cpp
index 1136edee2..8b0dd9bbb 100644
--- a/layout/style/nsRuleNode.cpp
+++ b/layout/style/nsRuleNode.cpp
@@ -870,8 +870,7 @@ static bool SetCoord(const nsCSSValue& aValue, nsStyleCoord& aCoord,
   bool result = true;
   if (aValue.GetUnit() == eCSSUnit_Null) {
     result = false;
-  }
-  else if ((((aMask & SETCOORD_LENGTH) != 0) &&
+  } else if ((((aMask & SETCOORD_LENGTH) != 0) &&
             aValue.IsLengthUnit()) ||
            (((aMask & SETCOORD_CALC_LENGTH_ONLY) != 0) &&
             aValue.IsCalcUnit())) {
@@ -883,83 +882,63 @@ static bool SetCoord(const nsCSSValue& aValue, nsStyleCoord& aCoord,
       len = 0;
     }
     aCoord.SetCoordValue(len);
-  }
-  else if (((aMask & SETCOORD_PERCENT) != 0) &&
+  } else if (((aMask & SETCOORD_PERCENT) != 0) &&
            (aValue.GetUnit() == eCSSUnit_Percent)) {
     aCoord.SetPercentValue(aValue.GetPercentValue());
-  }
-  else if (((aMask & SETCOORD_INTEGER) != 0) &&
+  } else if (((aMask & SETCOORD_INTEGER) != 0) &&
            (aValue.GetUnit() == eCSSUnit_Integer)) {
     aCoord.SetIntValue(aValue.GetIntValue(), eStyleUnit_Integer);
-  }
-  else if (((aMask & SETCOORD_ENUMERATED) != 0) &&
+  } else if (((aMask & SETCOORD_ENUMERATED) != 0) &&
            (aValue.GetUnit() == eCSSUnit_Enumerated)) {
     aCoord.SetIntValue(aValue.GetIntValue(), eStyleUnit_Enumerated);
-  }
-  else if (((aMask & SETCOORD_BOX_POSITION) != 0) &&
+  } else if (((aMask & SETCOORD_BOX_POSITION) != 0) &&
            (aValue.GetUnit() == eCSSUnit_Enumerated)) {
     aCoord.SetPercentValue(GetFloatFromBoxPosition(aValue.GetIntValue()));
-  }
-  else if (((aMask & SETCOORD_AUTO) != 0) &&
+  } else if (((aMask & SETCOORD_AUTO) != 0) &&
            (aValue.GetUnit() == eCSSUnit_Auto)) {
     aCoord.SetAutoValue();
-  }
-  else if ((((aMask & SETCOORD_INHERIT) != 0) &&
+  } else if ((((aMask & SETCOORD_INHERIT) != 0) &&
             aValue.GetUnit() == eCSSUnit_Inherit) ||
            (((aMask & SETCOORD_UNSET_INHERIT) != 0) &&
             aValue.GetUnit() == eCSSUnit_Unset)) {
     aCoord = aParentCoord;  // just inherit value from parent
     aConditions.SetUncacheable();
-  }
-  else if (((aMask & SETCOORD_NORMAL) != 0) &&
+  } else if (((aMask & SETCOORD_NORMAL) != 0) &&
            (aValue.GetUnit() == eCSSUnit_Normal)) {
     aCoord.SetNormalValue();
-  }
-  else if (((aMask & SETCOORD_NONE) != 0) &&
+  } else if (((aMask & SETCOORD_NONE) != 0) &&
            (aValue.GetUnit() == eCSSUnit_None)) {
     aCoord.SetNoneValue();
-  }
-  else if (((aMask & SETCOORD_FACTOR) != 0) &&
+  } else if (((aMask & SETCOORD_FACTOR) != 0) &&
            (aValue.GetUnit() == eCSSUnit_Number)) {
     aCoord.SetFactorValue(aValue.GetFloatValue());
-  }
-  else if (((aMask & SETCOORD_STORE_CALC) != 0) &&
+  } else if (((aMask & SETCOORD_STORE_CALC) != 0) &&
            (aValue.IsCalcUnit())) {
     SpecifiedCalcToComputedCalc(aValue, aCoord, aStyleContext,
                                 aConditions);
-  }
-  else if (aValue.GetUnit() == eCSSUnit_Initial ||
+  } else if (aValue.GetUnit() == eCSSUnit_Initial ||
            (aValue.GetUnit() == eCSSUnit_Unset &&
             ((aMask & SETCOORD_UNSET_INITIAL) != 0))) {
     if ((aMask & SETCOORD_INITIAL_AUTO) != 0) {
       aCoord.SetAutoValue();
-    }
-    else if ((aMask & SETCOORD_INITIAL_ZERO) != 0) {
+    } else if ((aMask & SETCOORD_INITIAL_ZERO) != 0) {
       aCoord.SetCoordValue(0);
-    }
-    else if ((aMask & SETCOORD_INITIAL_FACTOR_ZERO) != 0) {
+    } else if ((aMask & SETCOORD_INITIAL_FACTOR_ZERO) != 0) {
       aCoord.SetFactorValue(0.0f);
-    }
-    else if ((aMask & SETCOORD_INITIAL_NONE) != 0) {
+    } else if ((aMask & SETCOORD_INITIAL_NONE) != 0) {
       aCoord.SetNoneValue();
-    }
-    else if ((aMask & SETCOORD_INITIAL_NORMAL) != 0) {
+    } else if ((aMask & SETCOORD_INITIAL_NORMAL) != 0) {
       aCoord.SetNormalValue();
-    }
-    else if ((aMask & SETCOORD_INITIAL_HALF) != 0) {
+    } else if ((aMask & SETCOORD_INITIAL_HALF) != 0) {
       aCoord.SetPercentValue(0.5f);
-    }
-    else if ((aMask & SETCOORD_INITIAL_HUNDRED_PCT) != 0) {
+    } else if ((aMask & SETCOORD_INITIAL_HUNDRED_PCT) != 0) {
       aCoord.SetPercentValue(1.0f);
-    }
-    else if ((aMask & SETCOORD_INITIAL_FACTOR_ONE) != 0) {
+    } else if ((aMask & SETCOORD_INITIAL_FACTOR_ONE) != 0) {
       aCoord.SetFactorValue(1.0f);
-    }
-    else {
+    } else {
       result = false;  // didn't set anything
     }
-  }
-  else if ((aMask & SETCOORD_ANGLE) != 0 &&
+  } else if ((aMask & SETCOORD_ANGLE) != 0 &&
            (aValue.IsAngularUnit())) {
     nsStyleUnit unit;
     switch (aValue.GetUnit()) {
@@ -1038,8 +1017,7 @@ static bool SetColor(const nsCSSValue& aValue, const nscolor aParentColor,
   if (aValue.IsNumericColorUnit()) {
     aResult = aValue.GetColorValue();
     result = true;
-  }
-  else if (eCSSUnit_Ident == unit) {
+  } else if (eCSSUnit_Ident == unit) {
     nsAutoString  value;
     aValue.GetStringValue(value);
     nscolor rgba;
@@ -1047,8 +1025,7 @@ static bool SetColor(const nsCSSValue& aValue, const nscolor aParentColor,
       aResult = rgba;
       result = true;
     }
-  }
-  else if (eCSSUnit_EnumColor == unit) {
+  } else if (eCSSUnit_EnumColor == unit) {
     int32_t intValue = aValue.GetIntValue();
     if (0 <= intValue) {
       LookAndFeel::ColorID colorID = (LookAndFeel::ColorID) intValue;
@@ -1107,13 +1084,11 @@ static bool SetColor(const nsCSSValue& aValue, const nscolor aParentColor,
           break;
       }
     }
-  }
-  else if (eCSSUnit_Inherit == unit) {
+  } else if (eCSSUnit_Inherit == unit) {
     aResult = aParentColor;
     result = true;
     aConditions.SetUncacheable();
-  }
-  else if (eCSSUnit_Enumerated == unit &&
+  } else if (eCSSUnit_Enumerated == unit &&
            aValue.GetIntValue() == NS_STYLE_COLOR_INHERIT_FROM_BODY) {
     NS_ASSERTION(aPresContext->CompatibilityMode() == eCompatibility_NavQuirks,
                  "Should only get this value in quirks mode");
@@ -1586,14 +1561,17 @@ SetFactor(const nsCSSValue& aValue, float& aField, RuleNodeCacheConditions& aCon
     aField = aValue.GetFloatValue();
     if (aFlags & SETFCT_POSITIVE) {
       NS_ASSERTION(aField >= 0.0f, "negative value for positive-only property");
-      if (aField < 0.0f)
+      if (aField < 0.0f) {
         aField = 0.0f;
-    }
+      }
+    } 
     if (aFlags & SETFCT_OPACITY) {
-      if (aField < 0.0f)
+      if (aField < 0.0f) {
         aField = 0.0f;
-      if (aField > 1.0f)
+      }
+      if (aField > 1.0f) {
         aField = 1.0f;
+      }
     }
     return;
 
@@ -1727,10 +1705,11 @@ nsRuleNode::Transition(nsIStyleRule* aRule, SheetType aLevel,
       curr = curr->mNextSibling;
       ++numKids;
     }
-    if (curr)
+    if (curr) {
       next = curr;
-    else if (numKids >= kMaxChildrenInList)
+    } else if (numKids >= kMaxChildrenInList) {
       ConvertChildrenToHash(numKids);
+    }
   }
 
   if (ChildrenAreHashed()) {
@@ -1740,9 +1719,9 @@ nsRuleNode::Transition(nsIStyleRule* aRule, SheetType aLevel,
       NS_WARNING("out of memory");
       return this;
     }
-    if (entry->mRuleNode)
+    if (entry->mRuleNode) {
       next = entry->mRuleNode;
-    else {
+    } else {
       next = entry->mRuleNode = new (mPresContext)
         nsRuleNode(mPresContext, this, aRule, aLevel, aIsImportantRule);
     }
@@ -1961,10 +1940,11 @@ CheckFontCallback(const nsRuleData* aRuleData,
     // Promote reset to mixed since we have something that depends on
     // the parent.  But never promote to inherited since that could
     // cause inheritance of the exact value.
-    if (aResult == nsRuleNode::eRulePartialReset)
+    if (aResult == nsRuleNode::eRulePartialReset) {
       aResult = nsRuleNode::eRulePartialMixed;
-    else if (aResult == nsRuleNode::eRuleFullReset)
+    } else if (aResult == nsRuleNode::eRuleFullReset) {
       aResult = nsRuleNode::eRuleFullMixed;
+    }
   }
 
   return aResult;
@@ -1997,10 +1977,11 @@ CheckTextCallback(const nsRuleData* aRuleData,
        textAlignValue->GetIntValue() == NS_STYLE_TEXT_ALIGN_MATCH_PARENT)) {
     // Promote reset to mixed since we have something that depends on
     // the parent.
-    if (aResult == nsRuleNode::eRulePartialReset)
+    if (aResult == nsRuleNode::eRulePartialReset) {
       aResult = nsRuleNode::eRulePartialMixed;
-    else if (aResult == nsRuleNode::eRuleFullReset)
+    } else if (aResult == nsRuleNode::eRuleFullReset) {
       aResult = nsRuleNode::eRuleFullMixed;
+    }
   }
 
   return aResult;
@@ -2251,9 +2232,9 @@ nsRuleNode::CheckSpecifiedProperties(const nsStyleStructID aSID,
    * optimize based on the edge cases and not the in-between cases.
    */
   nsRuleNode::RuleDetail result;
-  if (inherited == total)
+  if (inherited == total) {
     result = eRuleFullInherited;
-  else if (specified == total
+  } else if (specified == total
            // MathML defines 5 properties in Font that will never be set when
            // MathML is not in use. Therefore if all but five
            // properties have been set, and MathML is not enabled, we can treat
@@ -2263,18 +2244,21 @@ nsRuleNode::CheckSpecifiedProperties(const nsStyleStructID aSID,
            || (aSID == eStyleStruct_Font && specified + 5 == total &&
                !mPresContext->Document()->GetMathMLEnabled())
           ) {
-    if (inherited == 0)
+    if (inherited == 0) {
       result = eRuleFullReset;
-    else
+    } else {
       result = eRuleFullMixed;
-  } else if (specified == 0)
+    }
+
+  } else if (specified == 0) {
     result = eRuleNone;
-  else if (specified == inherited)
+  } else if (specified == inherited) {
     result = eRulePartialInherited;
-  else if (inherited == 0)
+  } else if (inherited == 0) {
     result = eRulePartialReset;
-  else
+  } else {
     result = eRulePartialMixed;
+  }
 
   CheckCallbackFn cb = gCheckCallbacks[aSID];
   if (cb) {
@@ -2321,8 +2305,9 @@ UnsetPropertiesWithoutFlags(const nsStyleStructID aSID,
 
   for (size_t i = 0, i_end = nsCSSProps::PropertyCountInStruct(aSID);
        i != i_end; ++i) {
-    if ((flagData[i] & aFlags) != aFlags)
+    if ((flagData[i] & aFlags) != aFlags) {
       values[i].Reset();
+    }
   }
 }
 
@@ -2452,8 +2437,9 @@ nsRuleNode::WalkRuleTree(const nsStyleStructID aSID,
   while (ruleNode) {
     // See if this rule node has cached the fact that the remaining
     // nodes along this path specify no data whatsoever.
-    if (ruleNode->mNoneBits & bit)
+    if (ruleNode->mNoneBits & bit) {
       break;
+    }
 
     // If the dependent bit is set on a rule node for this struct, that
     // means its rule won't have any information to add, so skip it.
@@ -2472,9 +2458,9 @@ nsRuleNode::WalkRuleTree(const nsStyleStructID aSID,
     // Check for cached data after the inner loop above -- otherwise
     // we'll miss it.
     startStruct = ruleNode->mStyleData.GetStyleData(aSID);
-    if (startStruct)
+    if (startStruct) {
       break; // We found a rule with fully specified data.  We don't
-             // need to go up the tree any further, since the remainder
+    }        // need to go up the tree any further, since the remainder
              // of this branch has already been computed.
 
     // Ask the rule to fill in the properties that it specifies.
@@ -2490,14 +2476,15 @@ nsRuleNode::WalkRuleTree(const nsStyleStructID aSID,
     RuleDetail oldDetail = detail;
     detail = CheckSpecifiedProperties(aSID, &ruleData);
 
-    if (oldDetail == eRuleNone && detail != eRuleNone)
+    if (oldDetail == eRuleNone && detail != eRuleNone) {
       highestNode = ruleNode;
+    }
 
     if (detail == eRuleFullReset ||
         detail == eRuleFullMixed ||
-        detail == eRuleFullInherited)
+        detail == eRuleFullInherited) {
       break; // We don't need to examine any more rules.  All properties
-             // have been fully specified.
+    }        // have been fully specified.
 
     // Climb up to the next rule in the tree (a less specific rule).
     rootNode = ruleNode;
@@ -2540,8 +2527,9 @@ nsRuleNode::WalkRuleTree(const nsStyleStructID aSID,
                "can't have start struct and be fully specified");
 
   bool isReset = nsCachedStyleData::IsReset(aSID);
-  if (!highestNode)
+  if (!highestNode) {
     highestNode = rootNode;
+  }
 
   MOZ_ASSERT(!(aSID == eStyleStruct_Variables && startStruct),
              "if we start caching Variables structs in the rule tree, then "
@@ -2630,8 +2618,9 @@ nsRuleNode::WalkRuleTree(const nsStyleStructID aSID,
     // (detail == eRuleNone), which is the most common case here.
     // We must check |!isReset| because the Compute*Data functions for
     // reset structs wouldn't handle none bits correctly.
-    if (highestNode != this && !isReset)
+    if (highestNode != this && !isReset) {
       PropagateNoneBit(bit, highestNode);
+    }
 
     // All information must necessarily be inherited from our parent style context.
     // In the absence of any computed data in the rule tree and with
@@ -2883,32 +2872,34 @@ nsRuleNode::SetDefaultOnRoot(const nsStyleStructID aSID, nsStyleContext* aContex
       parentdata_ = maybeFakeParentData.ptr();                                \
     }                                                                         \
   }                                                                           \
-  if (eStyleStruct_##type_ == eStyleStruct_Variables)                         \
+  if (eStyleStruct_##type_ == eStyleStruct_Variables) {                       \
     /* no need to copy construct an nsStyleVariables, as we will copy */      \
     /* inherited variables (and call SetUncacheable()) in */                  \
     /* ComputeVariablesData */                                                \
     data_ = new (mPresContext) nsStyle##type_(mPresContext);                  \
-  else if (aStartStruct)                                                      \
+  } else if (aStartStruct) {                                                  \
     /* We only need to compute the delta between this computed data and */    \
     /* our computed data. */                                                  \
     data_ = new (mPresContext)                                                \
             nsStyle##type_(*static_cast<nsStyle##type_*>(aStartStruct));      \
-  else {                                                                      \
+  } else {                                                                    \
     if (aRuleDetail != eRuleFullMixed && aRuleDetail != eRuleFullReset) {     \
       /* No question. We will have to inherit. Go ahead and init */           \
       /* with inherited vals from parent. */                                  \
       conditions.SetUncacheable();                                            \
-      if (parentdata_)                                                        \
+      if (parentdata_) {                                                      \
         data_ = new (mPresContext) nsStyle##type_(*parentdata_);              \
-      else                                                                    \
+      } else {                                                                \
         data_ = new (mPresContext) nsStyle##type_(mPresContext);              \
-    }                                                                         \
-    else                                                                      \
+      }                                                                       \
+    } else {                                                                  \
       data_ = new (mPresContext) nsStyle##type_(mPresContext);                \
+    }	                                                                      \
   }                                                                           \
                                                                               \
-  if (!parentdata_)                                                           \
-    parentdata_ = data_;
+  if (!parentdata_) {                                                         \
+    parentdata_ = data_;                                                      \
+  }                                                                           \
 
 /**
  * Begin an nsRuleNode::Compute*Data function for a reset struct.
@@ -2932,14 +2923,14 @@ nsRuleNode::SetDefaultOnRoot(const nsStyleStructID aSID, nsStyleContext* aContex
   }                                                                           \
                                                                               \
   nsStyle##type_* data_;                                                      \
-  if (aStartStruct)                                                           \
+  if (aStartStruct) {                                                         \
     /* We only need to compute the delta between this computed data and */    \
     /* our computed data. */                                                  \
     data_ = new (mPresContext)                                                \
             nsStyle##type_(*static_cast<nsStyle##type_*>(aStartStruct));      \
-  else                                                                        \
+  } else {                                                                    \
     data_ = new (mPresContext) nsStyle##type_(mPresContext);                  \
-                                                                              \
+  }                                                                            \
   /* If |conditions.Cacheable()| might be true by the time we're done, we */  \
   /* can't call parentContext->Style##type_() since it could recur into */    \
   /* setting the same struct on the same rule node, causing a leak. */        \
@@ -3201,10 +3192,11 @@ nsRuleNode::CalcFontPointSize(int32_t aHTMLSize, int32_t aBasePointSize,
     aHTMLSize--;    // input as 1-7
   }
 
-  if (aHTMLSize < 0)
+  if (aHTMLSize < 0) {
     aHTMLSize = 0;
-  else if (aHTMLSize > 6)
+  } else if (aHTMLSize > 6) {
     aHTMLSize = 6;
+  }
 
   int32_t* column;
   switch (aFontSizeType)
@@ -3225,9 +3217,7 @@ nsRuleNode::CalcFontPointSize(int32_t aHTMLSize, int32_t aBasePointSize,
     } else {
       dFontSize = nsPresContext::CSSPixelsToAppUnits(sStrictFontSizeTable[row][column[aHTMLSize]]);
     }
-  }
-  else
-  {
+  } else {
     int32_t factor = sFontSizeFactors[column[aHTMLSize]];
     dFontSize = (factor * aBasePointSize) / 100;
   }
@@ -3277,8 +3267,9 @@ nsRuleNode::FindNextSmallerFontSize(nscoord aFontSize, int32_t aBasePointSize,
       // find largest index smaller than current
       for (index = indexMax; index >= indexMin; index--) {
         indexFontSize = CalcFontPointSize(index, aBasePointSize, aPresContext, aFontSizeType);
-        if (indexFontSize < aFontSize)
+        if (indexFontSize < aFontSize) {
           break;
+	}
       }
       // set up points beyond table for interpolation purposes
       if (indexFontSize == smallestIndexFontSize) {
@@ -3295,12 +3286,10 @@ nsRuleNode::FindNextSmallerFontSize(nscoord aFontSize, int32_t aBasePointSize,
       relativePosition = float(aFontSize - indexFontSize) / float(largerIndexFontSize - indexFontSize);
       // set the new size to have the same relative position between the next smallest two indexed sizes
       smallerSize = smallerIndexFontSize + NSToCoordRound(relativePosition * (indexFontSize - smallerIndexFontSize));
-    }
-    else {  // larger than HTML table, drop by 33%
+    } else {  // larger than HTML table, drop by 33%
       smallerSize = NSToCoordRound(float(aFontSize) / 1.5);
     }
-  }
-  else { // smaller than HTML table, drop by 1px
+  } else { // smaller than HTML table, drop by 1px
     smallerSize = std::max(aFontSize - onePx, onePx);
   }
   return smallerSize;
@@ -3344,8 +3333,9 @@ nsRuleNode::FindNextLargerFontSize(nscoord aFontSize, int32_t aBasePointSize,
       // find smallest index larger than current
       for (index = indexMin; index <= indexMax; index++) {
         indexFontSize = CalcFontPointSize(index, aBasePointSize, aPresContext, aFontSizeType);
-        if (indexFontSize > aFontSize)
+        if (indexFontSize > aFontSize) {
           break;
+	}
       }
       // set up points beyond table for interpolation purposes
       if (indexFontSize == smallestIndexFontSize) {
@@ -3363,12 +3353,10 @@ nsRuleNode::FindNextLargerFontSize(nscoord aFontSize, int32_t aBasePointSize,
       // set the new size to have the same relative position between the next largest two indexed sizes
       adjustment = NSCoordSaturatingNonnegativeMultiply(largerIndexFontSize - indexFontSize, relativePosition);
       largerSize = NSCoordSaturatingAdd(indexFontSize, adjustment);
-    }
-    else {  // larger than HTML table, increase by 50%
+    } else {  // larger than HTML table, increase by 50%
       largerSize = NSCoordSaturatingMultiply(aFontSize, 1.5);
     }
-  }
-  else { // smaller than HTML table, increase by 1px
+  } else { // smaller than HTML table, increase by 1px
     largerSize = NSCoordSaturatingAdd(aFontSize, onePx);
   }
   return largerSize;
@@ -3413,8 +3401,7 @@ struct SetFontSizeCalcOps : public css::BasicCoordCalcOps,
       if (!aValue.IsRelativeLengthUnit() && mParentFont->mAllowZoom) {
         size = nsStyleFont::ZoomText(mPresContext, size);
       }
-    }
-    else if (eCSSUnit_Percent == aValue.GetUnit()) {
+    } else if (eCSSUnit_Percent == aValue.GetUnit()) {
       mConditions.SetUncacheable();
       // Note that % units use the parent's size unadjusted for scriptlevel
       // changes. A scriptlevel change between us and the parent is simply
@@ -3458,12 +3445,10 @@ nsRuleNode::SetFontSize(nsPresContext* aPresContext,
         (value <= NS_STYLE_FONT_SIZE_XXLARGE)) {
       *aSize = CalcFontPointSize(value, baseSize,
                        aPresContext, eFontSize_CSS);
-    }
-    else if (NS_STYLE_FONT_SIZE_XXXLARGE == value) {
+    } else if (NS_STYLE_FONT_SIZE_XXXLARGE == value) {
       // <font size="7"> is not specified in CSS, so we don't use eFontSize_CSS.
       *aSize = CalcFontPointSize(value, baseSize, aPresContext);
-    }
-    else if (NS_STYLE_FONT_SIZE_LARGER  == value ||
+    } else if (NS_STYLE_FONT_SIZE_LARGER  == value ||
              NS_STYLE_FONT_SIZE_SMALLER == value) {
       aConditions.SetUncacheable();
 
@@ -3483,8 +3468,7 @@ nsRuleNode::SetFontSize(nsPresContext* aPresContext,
 
         NS_ASSERTION(*aSize >= parentSize,
                      "FindNextLargerFontSize failed");
-      }
-      else {
+      } else {
         *aSize = FindNextSmallerFontSize(parentSize,
                          baseSize, aPresContext, eFontSize_CSS);
         NS_ASSERTION(*aSize < parentSize ||
@@ -3494,8 +3478,7 @@ nsRuleNode::SetFontSize(nsPresContext* aPresContext,
     } else {
       NS_NOTREACHED("unexpected value");
     }
-  }
-  else if (sizeValue->IsLengthUnit() ||
+  } else if (sizeValue->IsLengthUnit() ||
            sizeValue->GetUnit() == eCSSUnit_Percent ||
            sizeValue->IsCalcUnit()) {
     SetFontSizeCalcOps ops(aParentSize, aParentFont,
@@ -3511,12 +3494,10 @@ nsRuleNode::SetFontSize(nsPresContext* aPresContext,
     // The calc ops will always zoom its result according to the value
     // of aParentFont->mAllowZoom.
     sizeIsZoomedAccordingToParent = true;
-  }
-  else if (eCSSUnit_System_Font == sizeValue->GetUnit()) {
+  } else if (eCSSUnit_System_Font == sizeValue->GetUnit()) {
     // this becomes our cascading size
     *aSize = aSystemFont.size;
-  }
-  else if (eCSSUnit_Inherit == sizeValue->GetUnit() ||
+  } else if (eCSSUnit_Inherit == sizeValue->GetUnit() ||
            eCSSUnit_Unset == sizeValue->GetUnit()) {
     aConditions.SetUncacheable();
     // We apply scriptlevel change for this case, because the default is
@@ -3524,8 +3505,7 @@ nsRuleNode::SetFontSize(nsPresContext* aPresContext,
     // default.
     *aSize = aScriptLevelAdjustedParentSize;
     sizeIsZoomedAccordingToParent = true;
-  }
-  else if (eCSSUnit_Initial == sizeValue->GetUnit()) {
+  } else if (eCSSUnit_Initial == sizeValue->GetUnit()) {
     // The initial value is 'medium', which has magical sizing based on
     // the generic font family, so do that here too.
     *aSize = baseSize;
@@ -3560,10 +3540,12 @@ nsRuleNode::SetFontSize(nsPresContext* aPresContext,
 }
 
 static int8_t ClampTo8Bit(int32_t aValue) {
-  if (aValue < -128)
+  if (aValue < -128) {
     return -128;
-  if (aValue > 127)
+  }
+  if (aValue > 127) {
     return 127;
+  }
   return int8_t(aValue);
 }
 
@@ -3722,20 +3704,17 @@ nsRuleNode::SetFont(nsPresContext* aPresContext, nsStyleContext* aContext,
     // to have since we'll still want it once we get rid of
     // SetGenericFont (bug 380915).
     aFont->mGenericID = aGenericFontID;
-  }
-  else if (eCSSUnit_System_Font == familyValue->GetUnit()) {
+  } else if (eCSSUnit_System_Font == familyValue->GetUnit()) {
     aFont->mFont.fontlist = systemFont.fontlist;
     aFont->mFont.systemFont = true;
     aFont->mGenericID = kGenericFont_NONE;
-  }
-  else if (eCSSUnit_Inherit == familyValue->GetUnit() ||
+  } else if (eCSSUnit_Inherit == familyValue->GetUnit() ||
            eCSSUnit_Unset == familyValue->GetUnit()) {
     aConditions.SetUncacheable();
     aFont->mFont.fontlist = aParentFont->mFont.fontlist;
     aFont->mFont.systemFont = aParentFont->mFont.systemFont;
     aFont->mGenericID = aParentFont->mGenericID;
-  }
-  else if (eCSSUnit_Initial == familyValue->GetUnit()) {
+  } else if (eCSSUnit_Initial == familyValue->GetUnit()) {
     aFont->mFont.fontlist = defaultVariableFont->fontlist;
     aFont->mFont.systemFont = defaultVariableFont->systemFont;
     aFont->mGenericID = kGenericFont_NONE;
@@ -3863,24 +3842,20 @@ nsRuleNode::SetFont(nsPresContext* aPresContext, nsStyleContext* aContext,
     // "relative"
     aConditions.SetUncacheable();
     aFont->mScriptLevel = ClampTo8Bit(aParentFont->mScriptLevel + scriptLevelValue->GetIntValue());
-  }
-  else if (eCSSUnit_Number == scriptLevelValue->GetUnit()) {
+  } else if (eCSSUnit_Number == scriptLevelValue->GetUnit()) {
     // "absolute"
     aFont->mScriptLevel = ClampTo8Bit(int32_t(scriptLevelValue->GetFloatValue()));
-  }
-  else if (eCSSUnit_Auto == scriptLevelValue->GetUnit()) {
+  } else if (eCSSUnit_Auto == scriptLevelValue->GetUnit()) {
     // auto
     aConditions.SetUncacheable();
     aFont->mScriptLevel = ClampTo8Bit(aParentFont->mScriptLevel +
                                       (aParentFont->mMathDisplay ==
                                        NS_MATHML_DISPLAYSTYLE_INLINE ? 1 : 0));
-  }
-  else if (eCSSUnit_Inherit == scriptLevelValue->GetUnit() ||
+  } else if (eCSSUnit_Inherit == scriptLevelValue->GetUnit() ||
            eCSSUnit_Unset == scriptLevelValue->GetUnit()) {
     aConditions.SetUncacheable();
     aFont->mScriptLevel = aParentFont->mScriptLevel;
-  }
-  else if (eCSSUnit_Initial == scriptLevelValue->GetUnit()) {
+  } else if (eCSSUnit_Initial == scriptLevelValue->GetUnit()) {
     aFont->mScriptLevel = 0;
   }
 
@@ -4151,10 +4126,11 @@ nsRuleNode::SetFont(nsPresContext* aPresContext, nsStyleContext* aContext,
   const nsCSSValue* sizeAdjustValue = aRuleData->ValueForFontSizeAdjust();
   if (eCSSUnit_System_Font == sizeAdjustValue->GetUnit()) {
     aFont->mFont.sizeAdjust = systemFont.sizeAdjust;
-  } else
+  } else {
     SetFactor(*sizeAdjustValue, aFont->mFont.sizeAdjust,
               aConditions, aParentFont->mFont.sizeAdjust, -1.0f,
               SETFCT_NONE | SETFCT_UNSET_INHERIT);
+  }
 }
 
 /* static */ void
@@ -4248,9 +4224,10 @@ nsRuleNode::SetGenericFont(nsPresContext* aPresContext,
     // aStartStruct.
     for (nsRuleNode* ruleNode = context->RuleNode(); ruleNode;
          ruleNode = ruleNode->GetParent()) {
-      if (ruleNode->mNoneBits & fontBit)
+      if (ruleNode->mNoneBits & fontBit) {
         // no more font rules on this branch, get out
         break;
+      }
 
       nsIStyleRule *rule = ruleNode->GetRule();
       if (rule) {
@@ -4264,8 +4241,9 @@ nsRuleNode::SetGenericFont(nsPresContext* aPresContext,
 
     // Avoid unnecessary operations in SetFont().  But we care if it's
     // the final value that we're computing.
-    if (i != 0)
+    if (i != 0) {
       ruleData.ValueForFontFamily()->Reset();
+    }
 
     ResolveVariableReferences(eStyleStruct_Font, &ruleData, aContext);
 
@@ -4352,8 +4330,7 @@ nsRuleNode::ComputeFontData(void* aStartStruct,
     nsRuleNode::SetFont(mPresContext, aContext, generic,
                         aRuleData, parentFont, font,
                         aStartStruct != nullptr, conditions);
-  }
-  else {
+  } else {
     // re-calculate the font as a generic font
     conditions.SetUncacheable();
     nsRuleNode::SetGenericFont(mPresContext, aContext, generic,
@@ -4388,8 +4365,9 @@ GetShadowData(const nsCSSValueList* aList,
   RefPtr<nsCSSShadowArray> shadowList =
     new(arrayLength) nsCSSShadowArray(arrayLength);
 
-  if (!shadowList)
+  if (!shadowList) {
     return nullptr;
+  }
 
   nsStyleCoord tempCoord;
   DebugOnly<bool> unitOK;
@@ -4508,20 +4486,20 @@ TruncateStringToSingleGrapheme(nsAString& aStr)
   }
 }
 
-struct LineHeightCalcObj
+struct LengthNumberCalcObj
 {
-  float mLineHeight;
+  float mValue;
   bool mIsNumber;
 };
 
-struct SetLineHeightCalcOps : public css::NumbersAlreadyNormalizedOps
+struct LengthNumberCalcOps : public css::NumbersAlreadyNormalizedOps
 {
-  typedef LineHeightCalcObj result_type;
+  typedef LengthNumberCalcObj result_type;
   nsStyleContext* const mStyleContext;
   nsPresContext* const mPresContext;
   RuleNodeCacheConditions& mConditions;
 
-  SetLineHeightCalcOps(nsStyleContext* aStyleContext,
+  LengthNumberCalcOps(nsStyleContext* aStyleContext,
                        nsPresContext* aPresContext,
                        RuleNodeCacheConditions& aConditions)
     : mStyleContext(aStyleContext),
@@ -4536,15 +4514,15 @@ struct SetLineHeightCalcOps : public css::NumbersAlreadyNormalizedOps
   {
     MOZ_ASSERT(aValue1.mIsNumber == aValue2.mIsNumber);
 
-    LineHeightCalcObj result;
+    LengthNumberCalcObj result;
     result.mIsNumber = aValue1.mIsNumber;
     if (aCalcFunction == eCSSUnit_Calc_Plus) {
-      result.mLineHeight = aValue1.mLineHeight + aValue2.mLineHeight;
+      result.mValue = aValue1.mValue + aValue2.mValue;
       return result;
     }
     MOZ_ASSERT(aCalcFunction == eCSSUnit_Calc_Minus,
                "unexpected unit");
-    result.mLineHeight = aValue1.mLineHeight - aValue2.mLineHeight;
+    result.mValue = aValue1.mValue - aValue2.mValue;
     return result;
   }
 
@@ -4554,9 +4532,9 @@ struct SetLineHeightCalcOps : public css::NumbersAlreadyNormalizedOps
   {
     MOZ_ASSERT(aCalcFunction == eCSSUnit_Calc_Times_L,
                "unexpected unit");
-    LineHeightCalcObj result;
+    LengthNumberCalcObj result;
     result.mIsNumber = aValue2.mIsNumber;
-    result.mLineHeight = aValue1 * aValue2.mLineHeight;
+    result.mValue = aValue1 * aValue2.mValue;
     return result;
   }
 
@@ -4564,39 +4542,66 @@ struct SetLineHeightCalcOps : public css::NumbersAlreadyNormalizedOps
   MergeMultiplicativeR(nsCSSUnit aCalcFunction,
                        result_type aValue1, float aValue2)
   {
-    LineHeightCalcObj result;
+    LengthNumberCalcObj result;
     result.mIsNumber = aValue1.mIsNumber;
     if (aCalcFunction == eCSSUnit_Calc_Times_R) {
-      result.mLineHeight = aValue1.mLineHeight * aValue2;
+      result.mValue = aValue1.mValue * aValue2;
       return result;
     }
     MOZ_ASSERT(aCalcFunction == eCSSUnit_Calc_Divided,
                "unexpected unit");
-    result.mLineHeight = aValue1.mLineHeight / aValue2;
+    result.mValue = aValue1.mValue / aValue2;
     return result;
   }
 
   result_type ComputeLeafValue(const nsCSSValue& aValue)
   {
-    LineHeightCalcObj result;
+    LengthNumberCalcObj result;
     if (aValue.IsLengthUnit()) {
       result.mIsNumber = false;
-      result.mLineHeight = CalcLength(aValue, mStyleContext,
+      result.mValue = CalcLength(aValue, mStyleContext,
                                       mPresContext, mConditions);
+    } else if (eCSSUnit_Number == aValue.GetUnit()) {
+      result.mIsNumber = true;
+      result.mValue = aValue.GetFloatValue();
+    } else {
+      MOZ_ASSERT(false, "unexpected value");
+      result.mIsNumber = true;
+      result.mValue = 1.0f;
     }
-    else if (eCSSUnit_Percent == aValue.GetUnit()) {
+
+    return result;
+  }
+};
+
+struct SetLineHeightCalcOps : public LengthNumberCalcOps
+{
+  SetLineHeightCalcOps(nsStyleContext* aStyleContext,
+                       nsPresContext* aPresContext,
+                       RuleNodeCacheConditions& aConditions)
+    : LengthNumberCalcOps(aStyleContext, aPresContext, aConditions)
+  {
+  }
+
+  result_type ComputeLeafValue(const nsCSSValue& aValue)
+  {
+    LengthNumberCalcObj result;
+    if (aValue.IsLengthUnit()) {
+      result.mIsNumber = false;
+      result.mValue = CalcLength(aValue, mStyleContext,
+                                      mPresContext, mConditions);
+    } else if (eCSSUnit_Percent == aValue.GetUnit()) {
       mConditions.SetUncacheable();
       result.mIsNumber = false;
       nscoord fontSize = mStyleContext->StyleFont()->mFont.size;
-      result.mLineHeight = fontSize * aValue.GetPercentValue();
-    }
-    else if (eCSSUnit_Number == aValue.GetUnit()) {
+      result.mValue = fontSize * aValue.GetPercentValue();
+    } else if (eCSSUnit_Number == aValue.GetUnit()) {
       result.mIsNumber = true;
-      result.mLineHeight = aValue.GetFloatValue();
+      result.mValue = aValue.GetFloatValue();
     } else {
       MOZ_ASSERT(false, "unexpected value");
       result.mIsNumber = true;
-      result.mLineHeight = 1.0f;
+      result.mValue = 1.0f;
     }
 
     return result;
@@ -4620,11 +4625,25 @@ nsRuleNode::ComputeTextData(void* aStartStruct,
                                    mPresContext, text->*aField, conditions);
   };
 
-  // tab-size: integer, inherit
-  SetValue(*aRuleData->ValueForTabSize(),
-           text->mTabSize, conditions,
-           SETVAL_INTEGER | SETVAL_UNSET_INHERIT, parentText->mTabSize,
-           NS_STYLE_TABSIZE_INITIAL);
+  // tab-size: number, length, calc, inherit
+  const nsCSSValue* tabSizeValue = aRuleData->ValueForTabSize();
+  if (tabSizeValue->GetUnit() == eCSSUnit_Initial) {
+    text->mTabSize = nsStyleCoord(float(NS_STYLE_TABSIZE_INITIAL), eStyleUnit_Factor);
+  } else if (eCSSUnit_Calc == tabSizeValue->GetUnit()) {
+    LengthNumberCalcOps ops(aContext, mPresContext, conditions);
+    LengthNumberCalcObj obj = css::ComputeCalc(*tabSizeValue, ops);
+    float value = obj.mValue < 0 ? 0 : obj.mValue;
+    if (obj.mIsNumber) {
+      text->mTabSize.SetFactorValue(value);
+    } else {
+      text->mTabSize.SetCoordValue(
+        NSToCoordRoundWithClamp(value));
+    }
+  } else {
+    SetCoord(*tabSizeValue, text->mTabSize, parentText->mTabSize,
+             SETCOORD_LH | SETCOORD_FACTOR | SETCOORD_UNSET_INHERIT,
+             aContext, mPresContext, conditions);
+  }
 
   // letter-spacing: normal, length, inherit
   SetCoord(*aRuleData->ValueForLetterSpacing(),
@@ -4660,22 +4679,19 @@ nsRuleNode::ComputeTextData(void* aStartStruct,
     text->mLineHeight.SetCoordValue(
         NSToCoordRound(float(aContext->StyleFont()->mFont.size) *
                        lineHeightValue->GetPercentValue()));
-  }
-  else if (eCSSUnit_Initial == lineHeightValue->GetUnit() ||
+  } else if (eCSSUnit_Initial == lineHeightValue->GetUnit() ||
            eCSSUnit_System_Font == lineHeightValue->GetUnit()) {
     text->mLineHeight.SetNormalValue();
-  }
-  else if (eCSSUnit_Calc == lineHeightValue->GetUnit()) {
+  } else if (eCSSUnit_Calc == lineHeightValue->GetUnit()) {
     SetLineHeightCalcOps ops(aContext, mPresContext, conditions);
-    LineHeightCalcObj obj = css::ComputeCalc(*lineHeightValue, ops);
+    LengthNumberCalcObj obj = css::ComputeCalc(*lineHeightValue, ops);
     if (obj.mIsNumber) {
-      text->mLineHeight.SetFactorValue(obj.mLineHeight);
+      text->mLineHeight.SetFactorValue(obj.mValue);
     } else {
       text->mLineHeight.SetCoordValue(
-        NSToCoordRoundWithClamp(obj.mLineHeight));
+        NSToCoordRoundWithClamp(obj.mValue));
     }
-  }
-  else {
+  } else {
     SetCoord(*lineHeightValue, text->mLineHeight, parentText->mLineHeight,
              SETCOORD_LEH | SETCOORD_FACTOR | SETCOORD_NORMAL |
                SETCOORD_UNSET_INHERIT,
@@ -5003,8 +5019,7 @@ nsRuleNode::ComputeTextResetData(void* aStartStruct,
         mPresContext->GetCachedBoolPref(kPresContext_UnderlineLinks);
       if (underlineLinks) {
         text->mTextDecorationLine |= NS_STYLE_TEXT_DECORATION_LINE_UNDERLINE;
-      }
-      else {
+      } else {
         text->mTextDecorationLine &= ~NS_STYLE_TEXT_DECORATION_LINE_UNDERLINE;
       }
     }
@@ -5160,11 +5175,9 @@ nsRuleNode::ComputeUserInterfaceData(void* aStartStruct,
       conditions.SetUncacheable();
       ui->mCursor = parentUI->mCursor;
       ui->mCursorImages = parentUI->mCursorImages;
-    }
-    else if (cursorUnit == eCSSUnit_Initial) {
+    } else if (cursorUnit == eCSSUnit_Initial) {
       ui->mCursor = NS_STYLE_CURSOR_AUTO;
-    }
-    else {
+    } else {
       // The parser will never create a list that is *all* URL values --
       // that's invalid.
       MOZ_ASSERT(cursorUnit == eCSSUnit_List || cursorUnit == eCSSUnit_ListDep,
@@ -5397,8 +5410,9 @@ CountTransitionProps(const TransitionPropInfo* aInfo,
     } else {
       data.num = aDisplay->*(info.sdCount);
     }
-    if (data.num > numTransitions)
+    if (data.num > numTransitions) {
       numTransitions = data.num;
+    }
   }
 
   return numTransitions;
@@ -6080,13 +6094,11 @@ nsRuleNode::ComputeDisplayData(void* aStartStruct,
     } else {
       display->mBinding = nullptr;
     }
-  }
-  else if (eCSSUnit_None == bindingValue->GetUnit() ||
+  } else if (eCSSUnit_None == bindingValue->GetUnit() ||
            eCSSUnit_Initial == bindingValue->GetUnit() ||
            eCSSUnit_Unset == bindingValue->GetUnit()) {
     display->mBinding = nullptr;
-  }
-  else if (eCSSUnit_Inherit == bindingValue->GetUnit()) {
+  } else if (eCSSUnit_Inherit == bindingValue->GetUnit()) {
     conditions.SetUncacheable();
     display->mBinding = parentDisplay->mBinding;
   }
@@ -6123,12 +6135,10 @@ nsRuleNode::ComputeDisplayData(void* aStartStruct,
     display->mBreakBefore =
       (NS_STYLE_PAGE_BREAK_AVOID != breakBeforeValue->GetIntValue() &&
        NS_STYLE_PAGE_BREAK_AUTO  != breakBeforeValue->GetIntValue());
-  }
-  else if (eCSSUnit_Initial == breakBeforeValue->GetUnit() ||
+  } else if (eCSSUnit_Initial == breakBeforeValue->GetUnit() ||
            eCSSUnit_Unset == breakBeforeValue->GetUnit()) {
     display->mBreakBefore = false;
-  }
-  else if (eCSSUnit_Inherit == breakBeforeValue->GetUnit()) {
+  } else if (eCSSUnit_Inherit == breakBeforeValue->GetUnit()) {
     conditions.SetUncacheable();
     display->mBreakBefore = parentDisplay->mBreakBefore;
   }
@@ -6138,12 +6148,10 @@ nsRuleNode::ComputeDisplayData(void* aStartStruct,
     display->mBreakAfter =
       (NS_STYLE_PAGE_BREAK_AVOID != breakAfterValue->GetIntValue() &&
        NS_STYLE_PAGE_BREAK_AUTO  != breakAfterValue->GetIntValue());
-  }
-  else if (eCSSUnit_Initial == breakAfterValue->GetUnit() ||
+  } else if (eCSSUnit_Initial == breakAfterValue->GetUnit() ||
            eCSSUnit_Unset == breakAfterValue->GetUnit()) {
     display->mBreakAfter = false;
-  }
-  else if (eCSSUnit_Inherit == breakAfterValue->GetUnit()) {
+  } else if (eCSSUnit_Inherit == breakAfterValue->GetUnit()) {
     conditions.SetUncacheable();
     display->mBreakAfter = parentDisplay->mBreakAfter;
   }
@@ -6202,17 +6210,21 @@ nsRuleNode::ComputeDisplayData(void* aStartStruct,
 
     // NS_STYLE_OVERFLOW_CLIP is a deprecated value, so if it's specified
     // in only one dimension, convert it to NS_STYLE_OVERFLOW_HIDDEN.
-    if (display->mOverflowX == NS_STYLE_OVERFLOW_CLIP)
+    if (display->mOverflowX == NS_STYLE_OVERFLOW_CLIP) {
       display->mOverflowX = NS_STYLE_OVERFLOW_HIDDEN;
-    if (display->mOverflowY == NS_STYLE_OVERFLOW_CLIP)
+    }
+    if (display->mOverflowY == NS_STYLE_OVERFLOW_CLIP) {
       display->mOverflowY = NS_STYLE_OVERFLOW_HIDDEN;
+    }
 
     // If 'visible' is specified but doesn't match the other dimension, it
     // turns into 'auto'.
-    if (display->mOverflowX == NS_STYLE_OVERFLOW_VISIBLE)
+    if (display->mOverflowX == NS_STYLE_OVERFLOW_VISIBLE) {
       display->mOverflowX = NS_STYLE_OVERFLOW_AUTO;
-    if (display->mOverflowY == NS_STYLE_OVERFLOW_VISIBLE)
+    }
+    if (display->mOverflowY == NS_STYLE_OVERFLOW_VISIBLE) {
       display->mOverflowY = NS_STYLE_OVERFLOW_AUTO;
+    }
   }
 
   // When 'contain: paint', update overflow from 'visible' to 'clip'.
@@ -6691,11 +6703,9 @@ nsRuleNode::ComputeColorData(void* aStartStruct,
       colorValue->GetUnit() == eCSSUnit_Unset) {
     color->mColor = parentColor->mColor;
     conditions.SetUncacheable();
-  }
-  else if (colorValue->GetUnit() == eCSSUnit_Initial) {
+  } else if (colorValue->GetUnit() == eCSSUnit_Initial) {
     color->mColor = mPresContext->DefaultColor();
-  }
-  else {
+  } else {
     SetColor(*colorValue, parentColor->mColor, mPresContext, aContext,
              color->mColor, conditions);
   }
@@ -6980,8 +6990,7 @@ struct BackgroundItemComputer<nsCSSValuePairList, nsStyleImageLayers::Size>
       const nsCSSValue &specified = aSpecifiedValue->*(axis->specified);
       if (eCSSUnit_Auto == specified.GetUnit()) {
         size.*(axis->type) = nsStyleImageLayers::Size::eAuto;
-      }
-      else if (eCSSUnit_Enumerated == specified.GetUnit()) {
+      } else if (eCSSUnit_Enumerated == specified.GetUnit()) {
         static_assert(nsStyleImageLayers::Size::eContain ==
                       NS_STYLE_IMAGELAYER_SIZE_CONTAIN &&
                       nsStyleImageLayers::Size::eCover ==
@@ -6991,8 +7000,7 @@ struct BackgroundItemComputer<nsCSSValuePairList, nsStyleImageLayers::Size>
                    specified.GetIntValue() == NS_STYLE_IMAGELAYER_SIZE_COVER,
                    "invalid enumerated value for size coordinate");
         size.*(axis->type) = specified.GetIntValue();
-      }
-      else if (eCSSUnit_Null == specified.GetUnit()) {
+      } else if (eCSSUnit_Null == specified.GetUnit()) {
         MOZ_ASSERT(axis == gBGSizeAxes + 1,
                    "null allowed only as height value, and only "
                    "for contain/cover/initial/inherit");
@@ -7011,14 +7019,12 @@ struct BackgroundItemComputer<nsCSSValuePairList, nsStyleImageLayers::Size>
         }
 #endif
         size.*(axis->type) = size.mWidthType;
-      }
-      else if (eCSSUnit_Percent == specified.GetUnit()) {
+      } else if (eCSSUnit_Percent == specified.GetUnit()) {
         (size.*(axis->result)).mLength = 0;
         (size.*(axis->result)).mPercent = specified.GetPercentValue();
         (size.*(axis->result)).mHasPercent = true;
         size.*(axis->type) = nsStyleImageLayers::Size::eLengthPercentage;
-      }
-      else if (specified.IsLengthUnit()) {
+      } else if (specified.IsLengthUnit()) {
         (size.*(axis->result)).mLength =
           CalcLength(specified, aStyleContext, aStyleContext->PresContext(),
                      aConditions);
@@ -7110,8 +7116,9 @@ SetImageLayerList(nsStyleContext* aStyleContext,
     MOZ_ASSERT(false, "unexpected unit");
   }
 
-  if (aItemCount > aMaxItemCount)
+  if (aItemCount > aMaxItemCount) {
     aMaxItemCount = aItemCount;
+  }
 }
 
 // The same as SetImageLayerList, but for values stored in
@@ -7180,8 +7187,9 @@ SetImageLayerPositionCoordList(
     MOZ_ASSERT(false, "unexpected unit");
   }
 
-  if (aItemCount > aMaxItemCount)
+  if (aItemCount > aMaxItemCount) {
     aMaxItemCount = aItemCount;
+  }
 }
 
 template <class ComputedValueItem>
@@ -7248,8 +7256,9 @@ SetImageLayerPairList(nsStyleContext* aStyleContext,
     MOZ_ASSERT(false, "unexpected unit");
   }
 
-  if (aItemCount > aMaxItemCount)
+  if (aItemCount > aMaxItemCount) {
     aMaxItemCount = aItemCount;
+  }
 }
 
 template <class ComputedValueItem>
@@ -7594,26 +7603,22 @@ nsRuleNode::ComputeBorderData(void* aStartStruct,
                      "Unexpected enum value");
         border->SetBorderWidth(side,
                                (mPresContext->GetBorderWidthTable())[value.GetIntValue()]);
-      }
       // OK to pass bad aParentCoord since we're not passing SETCOORD_INHERIT
-      else if (SetCoord(value, coord, nsStyleCoord(),
+      } else if (SetCoord(value, coord, nsStyleCoord(),
                         SETCOORD_LENGTH | SETCOORD_CALC_LENGTH_ONLY,
                         aContext, mPresContext, conditions)) {
         NS_ASSERTION(coord.GetUnit() == eStyleUnit_Coord, "unexpected unit");
         // clamp negative calc() to 0.
         border->SetBorderWidth(side, std::max(coord.GetCoordValue(), 0));
-      }
-      else if (eCSSUnit_Inherit == value.GetUnit()) {
+      } else if (eCSSUnit_Inherit == value.GetUnit()) {
         conditions.SetUncacheable();
         border->SetBorderWidth(side,
                                parentBorder->GetComputedBorder().Side(side));
-      }
-      else if (eCSSUnit_Initial == value.GetUnit() ||
+      } else if (eCSSUnit_Initial == value.GetUnit() ||
                eCSSUnit_Unset == value.GetUnit()) {
         border->SetBorderWidth(side,
           (mPresContext->GetBorderWidthTable())[NS_STYLE_BORDER_WIDTH_MEDIUM]);
-      }
-      else {
+      } else {
         NS_ASSERTION(eCSSUnit_Null == value.GetUnit(),
                      "missing case handling border width");
       }
@@ -7631,12 +7636,10 @@ nsRuleNode::ComputeBorderData(void* aStartStruct,
                  "'none' should be handled as enumerated value");
       if (eCSSUnit_Enumerated == unit) {
         border->SetBorderStyle(side, value.GetIntValue());
-      }
-      else if (eCSSUnit_Initial == unit ||
+      } else if (eCSSUnit_Initial == unit ||
                eCSSUnit_Unset == unit) {
         border->SetBorderStyle(side, NS_STYLE_BORDER_STYLE_NONE);
-      }
-      else if (eCSSUnit_Inherit == unit) {
+      } else if (eCSSUnit_Inherit == unit) {
         conditions.SetUncacheable();
         border->SetBorderStyle(side, parentBorder->GetBorderStyle(side));
       }
@@ -7689,9 +7692,9 @@ nsRuleNode::ComputeBorderData(void* aStartStruct,
       const nsCSSValueList* list = value.GetListValue();
       while (list) {
         if (SetColor(list->mValue, unused, mPresContext,
-                     aContext, borderColor, conditions))
+                     aContext, borderColor, conditions)) {
           border->AppendBorderColor(side, borderColor);
-        else {
+	} else {
           NS_NOTREACHED("unexpected item in -moz-border-*-colors list");
         }
         list = list->mNext;
@@ -7880,8 +7883,7 @@ nsRuleNode::ComputeOutlineData(void* aStartStruct,
       eCSSUnit_Unset == outlineWidthValue->GetUnit()) {
     outline->mOutlineWidth =
       nsStyleCoord(NS_STYLE_BORDER_WIDTH_MEDIUM, eStyleUnit_Enumerated);
-  }
-  else {
+  } else {
     SetCoord(*outlineWidthValue, outline->mOutlineWidth,
              parentOutline->mOutlineWidth,
              SETCOORD_LEH | SETCOORD_CALC_LENGTH_ONLY, aContext,
@@ -8068,12 +8070,10 @@ nsRuleNode::ComputeListData(void* aStartStruct,
     SetStyleImageRequest([&](nsStyleImageRequest* req) {
       list->mListStyleImage = req;
     }, mPresContext, *imageValue, nsStyleImageRequest::Mode(0));
-  }
-  else if (eCSSUnit_None == imageValue->GetUnit() ||
+  } else if (eCSSUnit_None == imageValue->GetUnit() ||
            eCSSUnit_Initial == imageValue->GetUnit()) {
     list->mListStyleImage = nullptr;
-  }
-  else if (eCSSUnit_Inherit == imageValue->GetUnit() ||
+  } else if (eCSSUnit_Inherit == imageValue->GetUnit() ||
            eCSSUnit_Unset == imageValue->GetUnit()) {
     conditions.SetUncacheable();
     list->mListStyleImage = parentList->mListStyleImage;
@@ -8106,31 +8106,35 @@ nsRuleNode::ComputeListData(void* aStartStruct,
   case eCSSUnit_Rect: {
     const nsCSSRect& rgnRect = imageRegionValue->GetRectValue();
 
-    if (rgnRect.mTop.GetUnit() == eCSSUnit_Auto)
+    if (rgnRect.mTop.GetUnit() == eCSSUnit_Auto) {
       list->mImageRegion.y = 0;
-    else if (rgnRect.mTop.IsLengthUnit())
+    } else if (rgnRect.mTop.IsLengthUnit()) {
       list->mImageRegion.y =
         CalcLength(rgnRect.mTop, aContext, mPresContext, conditions);
+    }
 
-    if (rgnRect.mBottom.GetUnit() == eCSSUnit_Auto)
+    if (rgnRect.mBottom.GetUnit() == eCSSUnit_Auto) {
       list->mImageRegion.height = 0;
-    else if (rgnRect.mBottom.IsLengthUnit())
+    } else if (rgnRect.mBottom.IsLengthUnit()) {
       list->mImageRegion.height =
         CalcLength(rgnRect.mBottom, aContext, mPresContext,
                    conditions) - list->mImageRegion.y;
+    }
 
-    if (rgnRect.mLeft.GetUnit() == eCSSUnit_Auto)
+    if (rgnRect.mLeft.GetUnit() == eCSSUnit_Auto) {
       list->mImageRegion.x = 0;
-    else if (rgnRect.mLeft.IsLengthUnit())
+    } else if (rgnRect.mLeft.IsLengthUnit()) {
       list->mImageRegion.x =
         CalcLength(rgnRect.mLeft, aContext, mPresContext, conditions);
+    }
 
-    if (rgnRect.mRight.GetUnit() == eCSSUnit_Auto)
+    if (rgnRect.mRight.GetUnit() == eCSSUnit_Auto) {
       list->mImageRegion.width = 0;
-    else if (rgnRect.mRight.IsLengthUnit())
+    } else if (rgnRect.mRight.IsLengthUnit()) {
       list->mImageRegion.width =
         CalcLength(rgnRect.mRight, aContext, mPresContext,
                    conditions) - list->mImageRegion.x;
+    }
     break;
   }
 
@@ -8823,8 +8827,9 @@ nsRuleNode::ComputeTableData(void* aStartStruct,
   // span: pixels (not a real CSS prop)
   const nsCSSValue* spanValue = aRuleData->ValueForSpan();
   if (eCSSUnit_Enumerated == spanValue->GetUnit() ||
-      eCSSUnit_Integer == spanValue->GetUnit())
+      eCSSUnit_Integer == spanValue->GetUnit()) {
     table->mSpan = spanValue->GetIntValue();
+  }
 
   COMPUTE_END_RESET(Table, table)
 }
@@ -9224,20 +9229,17 @@ nsRuleNode::ComputeColumnData(void* aStartStruct,
       eCSSUnit_Unset == widthValue.GetUnit()) {
     column->SetColumnRuleWidth(
         (mPresContext->GetBorderWidthTable())[NS_STYLE_BORDER_WIDTH_MEDIUM]);
-  }
-  else if (eCSSUnit_Enumerated == widthValue.GetUnit()) {
+  } else if (eCSSUnit_Enumerated == widthValue.GetUnit()) {
     NS_ASSERTION(widthValue.GetIntValue() == NS_STYLE_BORDER_WIDTH_THIN ||
                  widthValue.GetIntValue() == NS_STYLE_BORDER_WIDTH_MEDIUM ||
                  widthValue.GetIntValue() == NS_STYLE_BORDER_WIDTH_THICK,
                  "Unexpected enum value");
     column->SetColumnRuleWidth(
         (mPresContext->GetBorderWidthTable())[widthValue.GetIntValue()]);
-  }
-  else if (eCSSUnit_Inherit == widthValue.GetUnit()) {
+  } else if (eCSSUnit_Inherit == widthValue.GetUnit()) {
     column->SetColumnRuleWidth(parent->GetComputedColumnRuleWidth());
     conditions.SetUncacheable();
-  }
-  else if (widthValue.IsLengthUnit() || widthValue.IsCalcUnit()) {
+  } else if (widthValue.IsLengthUnit() || widthValue.IsCalcUnit()) {
     nscoord len =
       CalcLength(widthValue, aContext, mPresContext, conditions);
     if (len < 0) {
@@ -9257,12 +9259,10 @@ nsRuleNode::ComputeColumnData(void* aStartStruct,
              "'none' should be handled as enumerated value");
   if (eCSSUnit_Enumerated == styleValue.GetUnit()) {
     column->mColumnRuleStyle = styleValue.GetIntValue();
-  }
-  else if (eCSSUnit_Initial == styleValue.GetUnit() ||
+  } else if (eCSSUnit_Initial == styleValue.GetUnit() ||
            eCSSUnit_Unset == styleValue.GetUnit()) {
     column->mColumnRuleStyle = NS_STYLE_BORDER_STYLE_NONE;
-  }
-  else if (eCSSUnit_Inherit == styleValue.GetUnit()) {
+  } else if (eCSSUnit_Inherit == styleValue.GetUnit()) {
     conditions.SetUncacheable();
     column->mColumnRuleStyle = parent->mColumnRuleStyle;
   }
@@ -10276,8 +10276,7 @@ nsRuleNode::ComputeEffectsData(void* aStartStruct,
     if (clipRect.mTop.GetUnit() == eCSSUnit_Auto) {
       effects->mClip.y = 0;
       effects->mClipFlags |= NS_STYLE_CLIP_TOP_AUTO;
-    }
-    else if (clipRect.mTop.IsLengthUnit()) {
+    } else if (clipRect.mTop.IsLengthUnit()) {
       effects->mClip.y = CalcLength(clipRect.mTop, aContext,
                                     mPresContext, conditions);
     }
@@ -10288,8 +10287,7 @@ nsRuleNode::ComputeEffectsData(void* aStartStruct,
       // nonempty if the actual clip rect could be nonempty.
       effects->mClip.height = NS_MAXSIZE;
       effects->mClipFlags |= NS_STYLE_CLIP_BOTTOM_AUTO;
-    }
-    else if (clipRect.mBottom.IsLengthUnit()) {
+    } else if (clipRect.mBottom.IsLengthUnit()) {
       effects->mClip.height = CalcLength(clipRect.mBottom, aContext,
                                          mPresContext, conditions) -
                               effects->mClip.y;
@@ -10298,8 +10296,7 @@ nsRuleNode::ComputeEffectsData(void* aStartStruct,
     if (clipRect.mLeft.GetUnit() == eCSSUnit_Auto) {
       effects->mClip.x = 0;
       effects->mClipFlags |= NS_STYLE_CLIP_LEFT_AUTO;
-    }
-    else if (clipRect.mLeft.IsLengthUnit()) {
+    } else if (clipRect.mLeft.IsLengthUnit()) {
       effects->mClip.x = CalcLength(clipRect.mLeft, aContext,
                                     mPresContext, conditions);
     }
@@ -10310,8 +10307,7 @@ nsRuleNode::ComputeEffectsData(void* aStartStruct,
       // nonempty if the actual clip rect could be nonempty.
       effects->mClip.width = NS_MAXSIZE;
       effects->mClipFlags |= NS_STYLE_CLIP_RIGHT_AUTO;
-    }
-    else if (clipRect.mRight.IsLengthUnit()) {
+    } else if (clipRect.mRight.IsLengthUnit()) {
       effects->mClip.width = CalcLength(clipRect.mRight, aContext,
                                         mPresContext, conditions) -
                              effects->mClip.x;
@@ -10371,8 +10367,9 @@ nsRuleNode::GetStyleData(nsStyleStructID aSID,
     }
   }
 
-  if (MOZ_UNLIKELY(!aComputeData))
+  if (MOZ_UNLIKELY(!aComputeData)) {
     return nullptr;
+  }
 
   // Nothing is cached.  We'll have to delve further and examine our rules.
   data = WalkRuleTree(aSID, aContext);
@@ -10409,18 +10406,18 @@ nsRuleNode::HasAuthorSpecifiedRules(nsStyleContext* aStyleContext,
 #endif
 
   uint32_t inheritBits = 0;
-  if (ruleTypeMask & NS_AUTHOR_SPECIFIED_BACKGROUND)
+  if (ruleTypeMask & NS_AUTHOR_SPECIFIED_BACKGROUND) {
     inheritBits |= NS_STYLE_INHERIT_BIT(Background);
-
-  if (ruleTypeMask & NS_AUTHOR_SPECIFIED_BORDER)
+  }
+  if (ruleTypeMask & NS_AUTHOR_SPECIFIED_BORDER) {
     inheritBits |= NS_STYLE_INHERIT_BIT(Border);
-
-  if (ruleTypeMask & NS_AUTHOR_SPECIFIED_PADDING)
+  }
+  if (ruleTypeMask & NS_AUTHOR_SPECIFIED_PADDING) {
     inheritBits |= NS_STYLE_INHERIT_BIT(Padding);
-
-  if (ruleTypeMask & NS_AUTHOR_SPECIFIED_TEXT_SHADOW)
+  }
+  if (ruleTypeMask & NS_AUTHOR_SPECIFIED_TEXT_SHADOW) {
     inheritBits |= NS_STYLE_INHERIT_BIT(Text);
-
+  }
   // properties in the SIDS, whether or not we care about them
   size_t nprops = 0,
          backgroundOffset, borderOffset, paddingOffset, textShadowOffset;
@@ -10625,12 +10622,16 @@ nsRuleNode::HasAuthorSpecifiedRules(nsStyleContext* aStyleContext,
       // eCSSUnit_DummyInherit values to eCSSUnit_Null (so we will be able to
       // detect them being styled by the author) and move up to our parent
       // style context.
-      for (uint32_t i = 0; i < nValues; ++i)
-        if (values[i]->GetUnit() == eCSSUnit_Null)
+      for (uint32_t i = 0; i < nValues; ++i) {
+        if (values[i]->GetUnit() == eCSSUnit_Null) {
           values[i]->SetDummyValue();
-      for (uint32_t i = 0; i < nValues; ++i)
-        if (values[i]->GetUnit() == eCSSUnit_DummyInherit)
+	}
+      }
+      for (uint32_t i = 0; i < nValues; ++i) {
+        if (values[i]->GetUnit() == eCSSUnit_DummyInherit) {
           values[i]->Reset();
+	}
+      }
       styleContext = styleContext->GetParent();
     }
   } while (haveExplicitUAInherit && styleContext);
diff --git a/layout/style/nsStyleStruct.cpp b/layout/style/nsStyleStruct.cpp
index 4c610cf08..a2b6833ac 100644
--- a/layout/style/nsStyleStruct.cpp
+++ b/layout/style/nsStyleStruct.cpp
@@ -3807,10 +3807,10 @@ nsStyleText::nsStyleText(StyleStructContext aContext)
   , mControlCharacterVisibility(nsCSSParser::ControlCharVisibilityDefault())
   , mTextEmphasisStyle(NS_STYLE_TEXT_EMPHASIS_STYLE_NONE)
   , mTextRendering(NS_STYLE_TEXT_RENDERING_AUTO)
-  , mTabSize(NS_STYLE_TABSIZE_INITIAL)
   , mTextEmphasisColor(StyleComplexColor::CurrentColor())
   , mWebkitTextFillColor(StyleComplexColor::CurrentColor())
   , mWebkitTextStrokeColor(StyleComplexColor::CurrentColor())
+  , mTabSize(float(NS_STYLE_TABSIZE_INITIAL), eStyleUnit_Factor)
   , mWordSpacing(0, nsStyleCoord::CoordConstructor)
   , mLetterSpacing(eStyleUnit_Normal)
   , mLineHeight(eStyleUnit_Normal)
@@ -3845,10 +3845,10 @@ nsStyleText::nsStyleText(const nsStyleText& aSource)
   , mTextEmphasisPosition(aSource.mTextEmphasisPosition)
   , mTextEmphasisStyle(aSource.mTextEmphasisStyle)
   , mTextRendering(aSource.mTextRendering)
-  , mTabSize(aSource.mTabSize)
   , mTextEmphasisColor(aSource.mTextEmphasisColor)
   , mWebkitTextFillColor(aSource.mWebkitTextFillColor)
   , mWebkitTextStrokeColor(aSource.mWebkitTextStrokeColor)
+  , mTabSize(aSource.mTabSize)
   , mWordSpacing(aSource.mWordSpacing)
   , mLetterSpacing(aSource.mLetterSpacing)
   , mLineHeight(aSource.mLineHeight)
diff --git a/layout/style/nsStyleStruct.h b/layout/style/nsStyleStruct.h
index 97724571d..c948d6056 100644
--- a/layout/style/nsStyleStruct.h
+++ b/layout/style/nsStyleStruct.h
@@ -2088,11 +2088,11 @@ struct MOZ_NEEDS_MEMMOVABLE_MEMBERS nsStyleText
   uint8_t mTextEmphasisPosition;        // [inherited] see nsStyleConsts.h
   uint8_t mTextEmphasisStyle;           // [inherited] see nsStyleConsts.h
   uint8_t mTextRendering;               // [inherited] see nsStyleConsts.h
-  int32_t mTabSize;                     // [inherited] see nsStyleConsts.h
   mozilla::StyleComplexColor mTextEmphasisColor;      // [inherited]
   mozilla::StyleComplexColor mWebkitTextFillColor;    // [inherited]
   mozilla::StyleComplexColor mWebkitTextStrokeColor;  // [inherited]
 
+  nsStyleCoord mTabSize;                // [inherited] coord, factor, calc
   nsStyleCoord mWordSpacing;            // [inherited] coord, percent, calc
   nsStyleCoord mLetterSpacing;          // [inherited] coord, normal
   nsStyleCoord mLineHeight;             // [inherited] coord, factor, normal
diff --git a/layout/style/test/property_database.js b/layout/style/test/property_database.js
index a7014c043..6b1ef5602 100644
--- a/layout/style/test/property_database.js
+++ b/layout/style/test/property_database.js
@@ -2028,13 +2028,22 @@ var gCSSProperties = {
     other_values: [ "ignore" ],
     invalid_values: []
   },
-  "-moz-tab-size": {
-    domProp: "MozTabSize",
+  "tab-size": {
+    domProp: "TabSize",
     inherited: true,
     type: CSS_TYPE_LONGHAND,
     initial_values: [ "8" ],
-    other_values: [ "0", "3", "99", "12000" ],
-    invalid_values: [ "-1", "-808", "3.0", "17.5" ]
+    other_values: [ "0", "2.5", "3", "99", "12000", "0px", "1em",
+	    "calc(1px + 1em)", "calc(1px - 2px)", "calc(1 + 1)", "calc(-2.5)" ],
+    invalid_values: [ "9%", "calc(9% + 1px)", "calc(1 + 1em)", "-1", "-808",
+	    "auto" ]
+  },
+  "-moz-tab-size": {
+    domProp: "MozTabSize",
+    inherited: true,
+    type: CSS_TYPE_SHORTHAND_AND_LONGHAND
+    alias_for: "tab-size",
+    subproperties: [ "tab-size" ]
   },
   "-moz-text-size-adjust": {
     domProp: "MozTextSizeAdjust",
diff --git a/layout/style/test/test_transitions_per_property.html b/layout/style/test/test_transitions_per_property.html
index f188f4f6f..83524b60d 100644
--- a/layout/style/test/test_transitions_per_property.html
+++ b/layout/style/test/test_transitions_per_property.html
@@ -248,6 +248,8 @@ var supported_properties = {
     // test_length_percent_calc_transition.
     "stroke-width": [ test_length_transition_svg, test_percent_transition,
                       test_length_clamped_svg, test_percent_clamped ],
+    "tab-size": [ test_float_zeroToOne_transition,
+                       test_float_aboveOne_transition, test_length_clamped ],
     "text-decoration": [ test_color_shorthand_transition,
                          test_true_currentcolor_shorthand_transition ],
     "text-decoration-color": [ test_color_transition,
diff --git a/media/webrtc/trunk/webrtc/modules/audio_processing/aec/aec_core.c b/media/webrtc/trunk/webrtc/modules/audio_processing/aec/aec_core.c
index 470c422db..1722ba82e 100644
--- a/media/webrtc/trunk/webrtc/modules/audio_processing/aec/aec_core.c
+++ b/media/webrtc/trunk/webrtc/modules/audio_processing/aec/aec_core.c
@@ -23,6 +23,7 @@
 #include <stddef.h>  // size_t
 #include <stdlib.h>
 #include <string.h>
+#include <stdbool.h>
 
 #include "webrtc/common_audio/ring_buffer.h"
 #include "webrtc/common_audio/signal_processing/include/signal_processing_library.h"
@@ -1573,33 +1574,36 @@ AecCore* WebRtcAec_CreateAec() {
 #endif
   aec->extended_filter_enabled = 0;
 
-  // Assembly optimization
-  WebRtcAec_FilterFar = FilterFar;
-  WebRtcAec_ScaleErrorSignal = ScaleErrorSignal;
-  WebRtcAec_FilterAdaptation = FilterAdaptation;
-  WebRtcAec_OverdriveAndSuppress = OverdriveAndSuppress;
-  WebRtcAec_ComfortNoise = ComfortNoise;
-  WebRtcAec_SubbandCoherence = SubbandCoherence;
+  static bool initted = false;
+  if (!initted) {
+    initted = true;
+    // Assembly optimization
+    WebRtcAec_FilterFar = FilterFar;
+    WebRtcAec_ScaleErrorSignal = ScaleErrorSignal;
+    WebRtcAec_FilterAdaptation = FilterAdaptation;
+    WebRtcAec_OverdriveAndSuppress = OverdriveAndSuppress;
+    WebRtcAec_ComfortNoise = ComfortNoise;
+    WebRtcAec_SubbandCoherence = SubbandCoherence;
 
 #if defined(WEBRTC_ARCH_X86_FAMILY)
-  if (WebRtc_GetCPUInfo(kSSE2)) {
-    WebRtcAec_InitAec_SSE2();
-  }
+    if (WebRtc_GetCPUInfo(kSSE2)) {
+      WebRtcAec_InitAec_SSE2();
+    }
 #endif
 
 #if defined(MIPS_FPU_LE)
-  WebRtcAec_InitAec_mips();
+    WebRtcAec_InitAec_mips();
 #endif
 
 #if defined(WEBRTC_ARCH_ARM_NEON)
-  WebRtcAec_InitAec_neon();
-#elif defined(WEBRTC_DETECT_ARM_NEON)
-  if ((WebRtc_GetCPUFeaturesARM() & kCPUFeatureNEON) != 0) {
     WebRtcAec_InitAec_neon();
-  }
+#elif defined(WEBRTC_DETECT_ARM_NEON)
+    if ((WebRtc_GetCPUFeaturesARM() & kCPUFeatureNEON) != 0) {
+      WebRtcAec_InitAec_neon();
+    }
 #endif
-
-  aec_rdft_init();
+    aec_rdft_init();
+  }
 
   return aec;
 }
diff --git a/memory/mozjemalloc/jemalloc.c b/memory/mozjemalloc/jemalloc.c
index 86864e1cd..0eb5241c7 100644
--- a/memory/mozjemalloc/jemalloc.c
+++ b/memory/mozjemalloc/jemalloc.c
@@ -302,6 +302,9 @@ typedef long ssize_t;
 #include <mach/mach_init.h>
 #include <mach/vm_map.h>
 #include <malloc/malloc.h>
+#ifndef _pthread_self
+#define _pthread_self() pthread_self()
+#endif
 #endif
 
 #endif
diff --git a/mfbt/UniquePtr.h b/mfbt/UniquePtr.h
index 7e1035bc6..79d76cf02 100644
--- a/mfbt/UniquePtr.h
+++ b/mfbt/UniquePtr.h
@@ -314,7 +314,7 @@ public:
     return *this;
   }
 
-  T& operator*() const { return *get(); }
+  typename AddLvalueReference<T>::Type operator*() const { return *get(); }
   Pointer operator->() const
   {
     MOZ_ASSERT(get(), "dereferencing a UniquePtr containing nullptr");
diff --git a/modules/brotli/README.mozilla b/modules/brotli/README.mozilla
index 47520e453..400393b29 100644
--- a/modules/brotli/README.mozilla
+++ b/modules/brotli/README.mozilla
@@ -11,4 +11,4 @@ The in-tree copy is updated by running
   sh update.sh
 from within the modules/brotli directory.
 
-Current version: [commit d6d98957ca8ccb1ef45922e978bb10efca0ea541].
+Current version: 1.0.9 Re-release [commit e61745a6b7add50d380cfd7d3883dd6c62fc2c71].
diff --git a/modules/brotli/common/constants.c b/modules/brotli/common/constants.c
new file mode 100644
index 000000000..6bad9f613
--- /dev/null
+++ b/modules/brotli/common/constants.c
@@ -0,0 +1,15 @@
+/* Copyright 2013 Google Inc. All Rights Reserved.
+
+   Distributed under MIT license.
+   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
+*/
+
+#include "./constants.h"
+
+const BrotliPrefixCodeRange
+    _kBrotliPrefixCodeRanges[BROTLI_NUM_BLOCK_LEN_SYMBOLS] = {
+        {1, 2},     {5, 2},     {9, 2},   {13, 2},    {17, 3},    {25, 3},
+        {33, 3},    {41, 3},    {49, 4},  {65, 4},    {81, 4},    {97, 4},
+        {113, 5},   {145, 5},   {177, 5}, {209, 5},   {241, 6},   {305, 6},
+        {369, 7},   {497, 8},   {753, 9}, {1265, 10}, {2289, 11}, {4337, 12},
+        {8433, 13}, {16625, 24}};
diff --git a/modules/brotli/common/constants.h b/modules/brotli/common/constants.h
index d1b88d12a..e848195a0 100644
--- a/modules/brotli/common/constants.h
+++ b/modules/brotli/common/constants.h
@@ -4,9 +4,18 @@
    See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
 */
 
+/**
+ * @file
+ * Common constants used in decoder and encoder API.
+ */
+
 #ifndef BROTLI_COMMON_CONSTANTS_H_
 #define BROTLI_COMMON_CONSTANTS_H_
 
+#include "./platform.h"
+#include <brotli/port.h>
+#include <brotli/types.h>
+
 /* Specification: 7.3. Encoding of the context map */
 #define BROTLI_CONTEXT_MAP_MAX_RLE 16
 
@@ -29,12 +38,31 @@
 #define BROTLI_INITIAL_REPEATED_CODE_LENGTH 8
 
 /* "Large Window Brotli" */
+
+/**
+ * The theoretical maximum number of distance bits specified for large window
+ * brotli, for 64-bit encoders and decoders. Even when in practice 32-bit
+ * encoders and decoders only support up to 30 max distance bits, the value is
+ * set to 62 because it affects the large window brotli file format.
+ * Specifically, it affects the encoding of simple huffman tree for distances,
+ * see Specification RFC 7932 chapter 3.4.
+ */
 #define BROTLI_LARGE_MAX_DISTANCE_BITS 62U
 #define BROTLI_LARGE_MIN_WBITS 10
+/**
+ * The maximum supported large brotli window bits by the encoder and decoder.
+ * Large window brotli allows up to 62 bits, however the current encoder and
+ * decoder, designed for 32-bit integers, only support up to 30 bits maximum.
+ */
 #define BROTLI_LARGE_MAX_WBITS 30
 
 /* Specification: 4. Encoding of distances */
 #define BROTLI_NUM_DISTANCE_SHORT_CODES 16
+/**
+ * Maximal number of "postfix" bits.
+ *
+ * Number of "postfix" bits is stored as 2 bits in meta-block header.
+ */
 #define BROTLI_MAX_NPOSTFIX 3
 #define BROTLI_MAX_NDIRECT 120
 #define BROTLI_MAX_DISTANCE_BITS 24U
@@ -45,9 +73,22 @@
 #define BROTLI_NUM_DISTANCE_SYMBOLS \
     BROTLI_DISTANCE_ALPHABET_SIZE(  \
         BROTLI_MAX_NDIRECT, BROTLI_MAX_NPOSTFIX, BROTLI_LARGE_MAX_DISTANCE_BITS)
+
+/* ((1 << 26) - 4) is the maximal distance that can be expressed in RFC 7932
+   brotli stream using NPOSTFIX = 0 and NDIRECT = 0. With other NPOSTFIX and
+   NDIRECT values distances up to ((1 << 29) + 88) could be expressed. */
 #define BROTLI_MAX_DISTANCE 0x3FFFFFC
+
+/* ((1 << 31) - 4) is the safe distance limit. Using this number as a limit
+   allows safe distance calculation without overflows, given the distance
+   alphabet size is limited to corresponding size
+   (see kLargeWindowDistanceCodeLimits). */
 #define BROTLI_MAX_ALLOWED_DISTANCE 0x7FFFFFFC
 
+
+/* Specification: 4. Encoding of Literal Insertion Lengths and Copy Lengths */
+#define BROTLI_NUM_INS_COPY_CODES 24
+
 /* 7.1. Context modes and context ID lookup for literals */
 /* "context IDs for literals are in the range of 0..63" */
 #define BROTLI_LITERAL_CONTEXT_BITS 6
@@ -61,4 +102,99 @@
 #define BROTLI_WINDOW_GAP 16
 #define BROTLI_MAX_BACKWARD_LIMIT(W) (((size_t)1 << (W)) - BROTLI_WINDOW_GAP)
 
+typedef struct BrotliDistanceCodeLimit {
+  uint32_t max_alphabet_size;
+  uint32_t max_distance;
+} BrotliDistanceCodeLimit;
+
+/* This function calculates maximal size of distance alphabet, such that the
+   distances greater than the given values can not be represented.
+
+   This limits are designed to support fast and safe 32-bit decoders.
+   "32-bit" means that signed integer values up to ((1 << 31) - 1) could be
+   safely expressed.
+
+   Brotli distance alphabet symbols do not represent consecutive distance
+   ranges. Each distance alphabet symbol (excluding direct distances and short
+   codes), represent interleaved (for NPOSTFIX > 0) range of distances.
+   A "group" of consecutive (1 << NPOSTFIX) symbols represent non-interleaved
+   range. Two consecutive groups require the same amount of "extra bits".
+
+   It is important that distance alphabet represents complete "groups".
+   To avoid complex logic on encoder side about interleaved ranges
+   it was decided to restrict both sides to complete distance code "groups".
+ */
+BROTLI_UNUSED_FUNCTION BrotliDistanceCodeLimit BrotliCalculateDistanceCodeLimit(
+    uint32_t max_distance, uint32_t npostfix, uint32_t ndirect) {
+  BrotliDistanceCodeLimit result;
+  /* Marking this function as unused, because not all files
+     including "constants.h" use it -> compiler warns about that. */
+  BROTLI_UNUSED(&BrotliCalculateDistanceCodeLimit);
+  if (max_distance <= ndirect) {
+    /* This case never happens / exists only for the sake of completeness. */
+    result.max_alphabet_size = max_distance + BROTLI_NUM_DISTANCE_SHORT_CODES;
+    result.max_distance = max_distance;
+    return result;
+  } else {
+    /* The first prohibited value. */
+    uint32_t forbidden_distance = max_distance + 1;
+    /* Subtract "directly" encoded region. */
+    uint32_t offset = forbidden_distance - ndirect - 1;
+    uint32_t ndistbits = 0;
+    uint32_t tmp;
+    uint32_t half;
+    uint32_t group;
+    /* Postfix for the last dcode in the group. */
+    uint32_t postfix = (1u << npostfix) - 1;
+    uint32_t extra;
+    uint32_t start;
+    /* Remove postfix and "head-start". */
+    offset = (offset >> npostfix) + 4;
+    /* Calculate the number of distance bits. */
+    tmp = offset / 2;
+    /* Poor-man's log2floor, to avoid extra dependencies. */
+    while (tmp != 0) {ndistbits++; tmp = tmp >> 1;}
+    /* One bit is covered with subrange addressing ("half"). */
+    ndistbits--;
+    /* Find subrange. */
+    half = (offset >> ndistbits) & 1;
+    /* Calculate the "group" part of dcode. */
+    group = ((ndistbits - 1) << 1) | half;
+    /* Calculated "group" covers the prohibited distance value. */
+    if (group == 0) {
+      /* This case is added for correctness; does not occur for limit > 128. */
+      result.max_alphabet_size = ndirect + BROTLI_NUM_DISTANCE_SHORT_CODES;
+      result.max_distance = ndirect;
+      return result;
+    }
+    /* Decrement "group", so it is the last permitted "group". */
+    group--;
+    /* After group was decremented, ndistbits and half must be recalculated. */
+    ndistbits = (group >> 1) + 1;
+    /* The last available distance in the subrange has all extra bits set. */
+    extra = (1u << ndistbits) - 1;
+    /* Calculate region start. NB: ndistbits >= 1. */
+    start = (1u << (ndistbits + 1)) - 4;
+    /* Move to subregion. */
+    start += (group & 1) << ndistbits;
+    /* Calculate the alphabet size. */
+    result.max_alphabet_size = ((group << npostfix) | postfix) + ndirect +
+        BROTLI_NUM_DISTANCE_SHORT_CODES + 1;
+    /* Calculate the maximal distance representable by alphabet. */
+    result.max_distance = ((start + extra) << npostfix) + postfix + ndirect + 1;
+    return result;
+  }
+}
+
+/* Represents the range of values belonging to a prefix code:
+   [offset, offset + 2^nbits) */
+typedef struct {
+  uint16_t offset;
+  uint8_t nbits;
+} BrotliPrefixCodeRange;
+
+/* "Soft-private", it is exported, but not "advertised" as API. */
+BROTLI_COMMON_API extern const BrotliPrefixCodeRange
+    _kBrotliPrefixCodeRanges[BROTLI_NUM_BLOCK_LEN_SYMBOLS];
+
 #endif  /* BROTLI_COMMON_CONSTANTS_H_ */
diff --git a/modules/brotli/common/context.c b/modules/brotli/common/context.c
new file mode 100644
index 000000000..2c2dceba9
--- /dev/null
+++ b/modules/brotli/common/context.c
@@ -0,0 +1,156 @@
+#include "./context.h"
+
+#include <brotli/types.h>
+
+/* Common context lookup table for all context modes. */
+const uint8_t _kBrotliContextLookupTable[2048] = {
+  /* CONTEXT_LSB6, last byte. */
+   0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
+  16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
+  32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
+  48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
+   0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
+  16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
+  32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
+  48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
+   0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
+  16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
+  32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
+  48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
+   0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
+  16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
+  32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
+  48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
+
+  /* CONTEXT_LSB6, second last byte, */
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+
+  /* CONTEXT_MSB6, last byte. */
+   0,  0,  0,  0,  1,  1,  1,  1,  2,  2,  2,  2,  3,  3,  3,  3,
+   4,  4,  4,  4,  5,  5,  5,  5,  6,  6,  6,  6,  7,  7,  7,  7,
+   8,  8,  8,  8,  9,  9,  9,  9, 10, 10, 10, 10, 11, 11, 11, 11,
+  12, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15,
+  16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 19,
+  20, 20, 20, 20, 21, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23,
+  24, 24, 24, 24, 25, 25, 25, 25, 26, 26, 26, 26, 27, 27, 27, 27,
+  28, 28, 28, 28, 29, 29, 29, 29, 30, 30, 30, 30, 31, 31, 31, 31,
+  32, 32, 32, 32, 33, 33, 33, 33, 34, 34, 34, 34, 35, 35, 35, 35,
+  36, 36, 36, 36, 37, 37, 37, 37, 38, 38, 38, 38, 39, 39, 39, 39,
+  40, 40, 40, 40, 41, 41, 41, 41, 42, 42, 42, 42, 43, 43, 43, 43,
+  44, 44, 44, 44, 45, 45, 45, 45, 46, 46, 46, 46, 47, 47, 47, 47,
+  48, 48, 48, 48, 49, 49, 49, 49, 50, 50, 50, 50, 51, 51, 51, 51,
+  52, 52, 52, 52, 53, 53, 53, 53, 54, 54, 54, 54, 55, 55, 55, 55,
+  56, 56, 56, 56, 57, 57, 57, 57, 58, 58, 58, 58, 59, 59, 59, 59,
+  60, 60, 60, 60, 61, 61, 61, 61, 62, 62, 62, 62, 63, 63, 63, 63,
+
+  /* CONTEXT_MSB6, second last byte, */
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+
+  /* CONTEXT_UTF8, last byte. */
+  /* ASCII range. */
+   0,  0,  0,  0,  0,  0,  0,  0,  0,  4,  4,  0,  0,  4,  0,  0,
+   0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+   8, 12, 16, 12, 12, 20, 12, 16, 24, 28, 12, 12, 32, 12, 36, 12,
+  44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 32, 32, 24, 40, 28, 12,
+  12, 48, 52, 52, 52, 48, 52, 52, 52, 48, 52, 52, 52, 52, 52, 48,
+  52, 52, 52, 52, 52, 48, 52, 52, 52, 52, 52, 24, 12, 28, 12, 12,
+  12, 56, 60, 60, 60, 56, 60, 60, 60, 56, 60, 60, 60, 60, 60, 56,
+  60, 60, 60, 60, 60, 56, 60, 60, 60, 60, 60, 24, 12, 28, 12,  0,
+  /* UTF8 continuation byte range. */
+  0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1,
+  0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1,
+  0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1,
+  0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1,
+  /* UTF8 lead byte range. */
+  2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3,
+  2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3,
+  2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3,
+  2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3,
+
+  /* CONTEXT_UTF8 second last byte. */
+  /* ASCII range. */
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1,
+  1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1,
+  1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 0,
+  /* UTF8 continuation byte range. */
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  /* UTF8 lead byte range. */
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+
+  /* CONTEXT_SIGNED, last byte, same as the above values shifted by 3 bits. */
+   0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+  16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
+  16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
+  16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
+  24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+  24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+  24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+  24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+  32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,
+  32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,
+  32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,
+  32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,
+  40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40,
+  40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40,
+  40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40,
+  48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 56,
+
+  /* CONTEXT_SIGNED, second last byte. */
+  0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
+  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
+  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
+  6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7,
+};
diff --git a/modules/brotli/common/context.h b/modules/brotli/common/context.h
index 24b3eb48f..685a279dc 100644
--- a/modules/brotli/common/context.h
+++ b/modules/brotli/common/context.h
@@ -88,6 +88,7 @@
 #ifndef BROTLI_COMMON_CONTEXT_H_
 #define BROTLI_COMMON_CONTEXT_H_
 
+#include <brotli/port.h>
 #include <brotli/types.h>
 
 typedef enum ContextType {
@@ -97,163 +98,14 @@ typedef enum ContextType {
   CONTEXT_SIGNED = 3
 } ContextType;
 
+/* "Soft-private", it is exported, but not "advertised" as API. */
 /* Common context lookup table for all context modes. */
-static const uint8_t kContextLookup[2048] = {
-  /* CONTEXT_LSB6, last byte. */
-   0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
-  16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
-  32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
-  48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
-   0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
-  16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
-  32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
-  48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
-   0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
-  16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
-  32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
-  48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
-   0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
-  16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
-  32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
-  48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
-
-  /* CONTEXT_LSB6, second last byte, */
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-
-  /* CONTEXT_MSB6, last byte. */
-   0,  0,  0,  0,  1,  1,  1,  1,  2,  2,  2,  2,  3,  3,  3,  3,
-   4,  4,  4,  4,  5,  5,  5,  5,  6,  6,  6,  6,  7,  7,  7,  7,
-   8,  8,  8,  8,  9,  9,  9,  9, 10, 10, 10, 10, 11, 11, 11, 11,
-  12, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15,
-  16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 19,
-  20, 20, 20, 20, 21, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23,
-  24, 24, 24, 24, 25, 25, 25, 25, 26, 26, 26, 26, 27, 27, 27, 27,
-  28, 28, 28, 28, 29, 29, 29, 29, 30, 30, 30, 30, 31, 31, 31, 31,
-  32, 32, 32, 32, 33, 33, 33, 33, 34, 34, 34, 34, 35, 35, 35, 35,
-  36, 36, 36, 36, 37, 37, 37, 37, 38, 38, 38, 38, 39, 39, 39, 39,
-  40, 40, 40, 40, 41, 41, 41, 41, 42, 42, 42, 42, 43, 43, 43, 43,
-  44, 44, 44, 44, 45, 45, 45, 45, 46, 46, 46, 46, 47, 47, 47, 47,
-  48, 48, 48, 48, 49, 49, 49, 49, 50, 50, 50, 50, 51, 51, 51, 51,
-  52, 52, 52, 52, 53, 53, 53, 53, 54, 54, 54, 54, 55, 55, 55, 55,
-  56, 56, 56, 56, 57, 57, 57, 57, 58, 58, 58, 58, 59, 59, 59, 59,
-  60, 60, 60, 60, 61, 61, 61, 61, 62, 62, 62, 62, 63, 63, 63, 63,
-
-  /* CONTEXT_MSB6, second last byte, */
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-
-  /* CONTEXT_UTF8, last byte. */
-  /* ASCII range. */
-   0,  0,  0,  0,  0,  0,  0,  0,  0,  4,  4,  0,  0,  4,  0,  0,
-   0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
-   8, 12, 16, 12, 12, 20, 12, 16, 24, 28, 12, 12, 32, 12, 36, 12,
-  44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 32, 32, 24, 40, 28, 12,
-  12, 48, 52, 52, 52, 48, 52, 52, 52, 48, 52, 52, 52, 52, 52, 48,
-  52, 52, 52, 52, 52, 48, 52, 52, 52, 52, 52, 24, 12, 28, 12, 12,
-  12, 56, 60, 60, 60, 56, 60, 60, 60, 56, 60, 60, 60, 60, 60, 56,
-  60, 60, 60, 60, 60, 56, 60, 60, 60, 60, 60, 24, 12, 28, 12,  0,
-  /* UTF8 continuation byte range. */
-  0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1,
-  0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1,
-  0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1,
-  0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1,
-  /* UTF8 lead byte range. */
-  2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3,
-  2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3,
-  2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3,
-  2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3,
-
-  /* CONTEXT_UTF8 second last byte. */
-  /* ASCII range. */
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1,
-  1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
-  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1,
-  1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
-  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 0,
-  /* UTF8 continuation byte range. */
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  /* UTF8 lead byte range. */
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
-  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
-
-  /* CONTEXT_SIGNED, last byte, same as the above values shifted by 3 bits. */
-   0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
-  16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
-  16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
-  16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
-  24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
-  24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
-  24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
-  24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
-  32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,
-  32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,
-  32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,
-  32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,
-  40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40,
-  40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40,
-  40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40,
-  48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 56,
-
-  /* CONTEXT_SIGNED, second last byte. */
-  0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
-  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
-  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
-  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
-  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
-  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
-  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
-  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
-  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
-  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
-  4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
-  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
-  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
-  5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
-  6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7,
-};
+BROTLI_COMMON_API extern const uint8_t _kBrotliContextLookupTable[2048];
 
 typedef const uint8_t* ContextLut;
 
 /* typeof(MODE) == ContextType; returns ContextLut */
-#define BROTLI_CONTEXT_LUT(MODE) (&kContextLookup[(MODE) << 9])
+#define BROTLI_CONTEXT_LUT(MODE) (&_kBrotliContextLookupTable[(MODE) << 9])
 
 /* typeof(LUT) == ContextLut */
 #define BROTLI_CONTEXT(P1, P2, LUT) ((LUT)[P1] | ((LUT) + 256)[P2])
diff --git a/modules/brotli/common/dictionary.c b/modules/brotli/common/dictionary.c
index 64822a381..f9e30417c 100644
--- a/modules/brotli/common/dictionary.c
+++ b/modules/brotli/common/dictionary.c
@@ -5,12 +5,13 @@
 */
 
 #include "./dictionary.h"
+#include "./platform.h"
 
 #if defined(__cplusplus) || defined(c_plusplus)
 extern "C" {
 #endif
 
-#ifndef BROTLI_EXTERNAL_DICTIONARY_DATA
+#if !defined(BROTLI_EXTERNAL_DICTIONARY_DATA)
 static const uint8_t kBrotliDictionaryData[] =
 {
 116,105,109,101,100,111,119,110,108,105,102,101,108,101,102,116,98,97,99,107,99,
@@ -5862,7 +5863,11 @@ static const uint8_t kBrotliDictionaryData[] =
 ;
 #endif  /* !BROTLI_EXTERNAL_DICTIONARY_DATA */
 
+#if !defined(BROTLI_EXTERNAL_DICTIONARY_DATA)
+static const BrotliDictionary kBrotliDictionary = {
+#else
 static BrotliDictionary kBrotliDictionary = {
+#endif
   /* size_bits_by_length */
   {
     0, 0, 0, 0, 10, 10, 11, 11,
@@ -5895,9 +5900,13 @@ const BrotliDictionary* BrotliGetDictionary() {
 }
 
 void BrotliSetDictionaryData(const uint8_t* data) {
+#if defined(BROTLI_EXTERNAL_DICTIONARY_DATA)
   if (!!data && !kBrotliDictionary.data) {
     kBrotliDictionary.data = data;
   }
+#else
+  BROTLI_UNUSED(data);  // Appease -Werror=unused-parameter
+#endif
 }
 
 #if defined(__cplusplus) || defined(c_plusplus)
diff --git a/modules/brotli/common/platform.c b/modules/brotli/common/platform.c
new file mode 100644
index 000000000..aef39e93c
--- /dev/null
+++ b/modules/brotli/common/platform.c
@@ -0,0 +1,22 @@
+/* Copyright 2016 Google Inc. All Rights Reserved.
+
+   Distributed under MIT license.
+   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
+*/
+
+#include <stdlib.h>
+
+#include "./platform.h"
+#include <brotli/types.h>
+
+/* Default brotli_alloc_func */
+void* BrotliDefaultAllocFunc(void* opaque, size_t size) {
+  BROTLI_UNUSED(opaque);
+  return malloc(size);
+}
+
+/* Default brotli_free_func */
+void BrotliDefaultFreeFunc(void* opaque, void* address) {
+  BROTLI_UNUSED(opaque);
+  free(address);
+}
diff --git a/modules/brotli/common/platform.h b/modules/brotli/common/platform.h
index 84c448c4c..f5ca4435b 100644
--- a/modules/brotli/common/platform.h
+++ b/modules/brotli/common/platform.h
@@ -24,12 +24,11 @@
 #define BROTLI_COMMON_PLATFORM_H_
 
 #include <string.h>  /* memcpy */
-#include <stdlib.h>  /* malloc, free */
 
 #include <brotli/port.h>
 #include <brotli/types.h>
 
-#if defined(OS_LINUX) || defined(OS_CYGWIN)
+#if defined(OS_LINUX) || defined(OS_CYGWIN) || defined(__EMSCRIPTEN__)
 #include <endian.h>
 #elif defined(OS_FREEBSD)
 #include <machine/endian.h>
@@ -41,6 +40,10 @@
 #define BROTLI_X_BIG_ENDIAN BIG_ENDIAN
 #endif
 
+#if BROTLI_MSVC_VERSION_CHECK(12, 0, 0)
+#include <intrin.h>
+#endif
+
 #if defined(BROTLI_ENABLE_LOG) || defined(BROTLI_DEBUG)
 #include <assert.h>
 #include <stdio.h>
@@ -308,8 +311,7 @@ static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) {
 }
 #else  /* BROTLI_ALIGNED_READ */
 /* Unaligned memory access is allowed: just cast pointer to requested type. */
-#if defined(ADDRESS_SANITIZER) || defined(THREAD_SANITIZER) || \
-    defined(MEMORY_SANITIZER)
+#if BROTLI_SANITIZED
 /* Consider we have an unaligned load/store of 4 bytes from address 0x...05.
    AddressSanitizer will treat it as a 3-byte access to the range 05:07 and
    will miss a bug if 08 is the first unaddressable byte.
@@ -334,7 +336,7 @@ extern "C" {
 #define BrotliUnalignedRead32 __sanitizer_unaligned_load32
 #define BrotliUnalignedRead64 __sanitizer_unaligned_load64
 #define BrotliUnalignedWrite64 __sanitizer_unaligned_store64
-#else
+#else  /* BROTLI_SANITIZED */
 static BROTLI_INLINE uint16_t BrotliUnalignedRead16(const void* p) {
   return *(const uint16_t*)p;
 }
@@ -356,7 +358,7 @@ static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) {
 typedef BROTLI_ALIGNED(1) uint64_t brotli_unaligned_uint64_t;
 
 static BROTLI_INLINE uint64_t BrotliUnalignedRead64(const void* p) {
-  return (uint64_t) ((brotli_unaligned_uint64_t*) p)[0];
+  return (uint64_t) ((const brotli_unaligned_uint64_t*) p)[0];
 }
 static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) {
   brotli_unaligned_uint64_t* dwords = (brotli_unaligned_uint64_t*) p;
@@ -374,7 +376,7 @@ static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) {
 }
 #endif  /* BROTLI_GNUC_HAS_ATTRIBUTE(aligned, 2, 7, 0) */
 #endif  /* BROTLI_64_BITS */
-#endif  /* ASAN / TSAN / MSAN */
+#endif  /* BROTLI_SANITIZED */
 #endif  /* BROTLI_ALIGNED_READ */
 
 #if BROTLI_LITTLE_ENDIAN
@@ -466,20 +468,20 @@ static BROTLI_INLINE void BROTLI_UNALIGNED_STORE64LE(void* p, uint64_t v) {
 #endif
 
 #if defined(BROTLI_ENABLE_LOG)
-#define BROTLI_DCHECK(x) assert(x)
 #define BROTLI_LOG(x) printf x
 #else
-#define BROTLI_DCHECK(x)
 #define BROTLI_LOG(x)
 #endif
 
 #if defined(BROTLI_DEBUG) || defined(BROTLI_ENABLE_LOG)
+#define BROTLI_DCHECK(x) assert(x)
 static BROTLI_INLINE void BrotliDump(const char* f, int l, const char* fn) {
   fprintf(stderr, "%s:%d (%s)\n", f, l, fn);
   fflush(stderr);
 }
 #define BROTLI_DUMP() BrotliDump(__FILE__, __LINE__, __FUNCTION__)
 #else
+#define BROTLI_DCHECK(x)
 #define BROTLI_DUMP() (void)(0)
 #endif
 
@@ -523,17 +525,41 @@ BROTLI_MIN_MAX(size_t) BROTLI_MIN_MAX(uint32_t) BROTLI_MIN_MAX(uint8_t)
   (A)[(J)] = __brotli_swap_tmp;   \
 }
 
-/* Default brotli_alloc_func */
-static void* BrotliDefaultAllocFunc(void* opaque, size_t size) {
-  BROTLI_UNUSED(opaque);
-  return malloc(size);
+#if BROTLI_64_BITS
+#if BROTLI_GNUC_HAS_BUILTIN(__builtin_ctzll, 3, 4, 0) || \
+    BROTLI_INTEL_VERSION_CHECK(16, 0, 0)
+#define BROTLI_TZCNT64 __builtin_ctzll
+#elif BROTLI_MSVC_VERSION_CHECK(12, 0, 0)
+#if defined(BROTLI_TARGET_X64)
+#define BROTLI_TZCNT64 _tzcnt_u64
+#else /* BROTLI_TARGET_X64 */
+static BROTLI_INLINE uint32_t BrotliBsf64Msvc(uint64_t x) {
+  uint32_t lsb;
+  _BitScanForward64(&lsb, x);
+  return lsb;
 }
+#define BROTLI_TZCNT64 BrotliBsf64Msvc
+#endif /* BROTLI_TARGET_X64 */
+#endif /* __builtin_ctzll */
+#endif /* BROTLI_64_BITS */
 
-/* Default brotli_free_func */
-static void BrotliDefaultFreeFunc(void* opaque, void* address) {
-  BROTLI_UNUSED(opaque);
-  free(address);
+#if BROTLI_GNUC_HAS_BUILTIN(__builtin_clz, 3, 4, 0) || \
+    BROTLI_INTEL_VERSION_CHECK(16, 0, 0)
+#define BROTLI_BSR32(x) (31u ^ (uint32_t)__builtin_clz(x))
+#elif BROTLI_MSVC_VERSION_CHECK(12, 0, 0)
+static BROTLI_INLINE uint32_t BrotliBsr32Msvc(uint32_t x) {
+  unsigned long msb;
+  _BitScanReverse(&msb, x);
+  return (uint32_t)msb;
 }
+#define BROTLI_BSR32 BrotliBsr32Msvc
+#endif /* __builtin_clz */
+
+/* Default brotli_alloc_func */
+BROTLI_COMMON_API void* BrotliDefaultAllocFunc(void* opaque, size_t size);
+
+/* Default brotli_free_func */
+BROTLI_COMMON_API void BrotliDefaultFreeFunc(void* opaque, void* address);
 
 BROTLI_UNUSED_FUNCTION void BrotliSuppressUnusedFunctions(void) {
   BROTLI_UNUSED(&BrotliSuppressUnusedFunctions);
diff --git a/modules/brotli/common/transform.c b/modules/brotli/common/transform.c
index 426e635fd..f8fa4335e 100644
--- a/modules/brotli/common/transform.c
+++ b/modules/brotli/common/transform.c
@@ -24,8 +24,8 @@ static const char kPrefixSuffix[217] =
 /* 8x  _0 _ _3    _8   _C _E _ _1     _7       _F */
       " not \3er \3al \4ful \4ive \5less \4es"
 /* Ax       _5   _9   _D    _2    _7     _D */
-      "t \4ize \2\xc2\xa0\4ous \5 the \2e \0";
-/* Cx    _2    _7___ ___ _A    _F     _5  _8 */
+      "t \4ize \2\xc2\xa0\4ous \5 the \2e "; /* \0 - implicit trailing zero. */
+/* Cx    _2    _7___ ___ _A    _F     _5        _8 */
 
 static const uint16_t kPrefixSuffixMap[50] = {
   0x00, 0x02, 0x05, 0x0E, 0x13, 0x16, 0x18, 0x1E, 0x23, 0x25,
@@ -160,12 +160,13 @@ static const uint8_t kTransformsData[] = {
    0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 34,
 };
 
-static BrotliTransforms kBrotliTransforms = {
+static const BrotliTransforms kBrotliTransforms = {
   sizeof(kPrefixSuffix),
   (const uint8_t*)kPrefixSuffix,
   kPrefixSuffixMap,
   sizeof(kTransformsData) / (3 * sizeof(kTransformsData[0])),
   kTransformsData,
+  NULL,  /* no extra parameters */
   {0, 12, 27, 23, 42, 63, 56, 48, 59, 64}
 };
 
@@ -190,6 +191,48 @@ static int ToUpperCase(uint8_t* p) {
   return 3;
 }
 
+static int Shift(uint8_t* word, int word_len, uint16_t parameter) {
+  /* Limited sign extension: scalar < (1 << 24). */
+  uint32_t scalar =
+      (parameter & 0x7FFFu) + (0x1000000u - (parameter & 0x8000u));
+  if (word[0] < 0x80) {
+    /* 1-byte rune / 0sssssss / 7 bit scalar (ASCII). */
+    scalar += (uint32_t)word[0];
+    word[0] = (uint8_t)(scalar & 0x7Fu);
+    return 1;
+  } else if (word[0] < 0xC0) {
+    /* Continuation / 10AAAAAA. */
+    return 1;
+  } else if (word[0] < 0xE0) {
+    /* 2-byte rune / 110sssss AAssssss / 11 bit scalar. */
+    if (word_len < 2) return 1;
+    scalar += (uint32_t)((word[1] & 0x3Fu) | ((word[0] & 0x1Fu) << 6u));
+    word[0] = (uint8_t)(0xC0 | ((scalar >> 6u) & 0x1F));
+    word[1] = (uint8_t)((word[1] & 0xC0) | (scalar & 0x3F));
+    return 2;
+  } else if (word[0] < 0xF0) {
+    /* 3-byte rune / 1110ssss AAssssss BBssssss / 16 bit scalar. */
+    if (word_len < 3) return word_len;
+    scalar += (uint32_t)((word[2] & 0x3Fu) | ((word[1] & 0x3Fu) << 6u) |
+        ((word[0] & 0x0Fu) << 12u));
+    word[0] = (uint8_t)(0xE0 | ((scalar >> 12u) & 0x0F));
+    word[1] = (uint8_t)((word[1] & 0xC0) | ((scalar >> 6u) & 0x3F));
+    word[2] = (uint8_t)((word[2] & 0xC0) | (scalar & 0x3F));
+    return 3;
+  } else if (word[0] < 0xF8) {
+    /* 4-byte rune / 11110sss AAssssss BBssssss CCssssss / 21 bit scalar. */
+    if (word_len < 4) return word_len;
+    scalar += (uint32_t)((word[3] & 0x3Fu) | ((word[2] & 0x3Fu) << 6u) |
+        ((word[1] & 0x3Fu) << 12u) | ((word[0] & 0x07u) << 18u));
+    word[0] = (uint8_t)(0xF0 | ((scalar >> 18u) & 0x07));
+    word[1] = (uint8_t)((word[1] & 0xC0) | ((scalar >> 12u) & 0x3F));
+    word[2] = (uint8_t)((word[2] & 0xC0) | ((scalar >> 6u) & 0x3F));
+    word[3] = (uint8_t)((word[3] & 0xC0) | (scalar & 0x3F));
+    return 4;
+  }
+  return 1;
+}
+
 int BrotliTransformDictionaryWord(uint8_t* dst, const uint8_t* word, int len,
     const BrotliTransforms* transforms, int transform_idx) {
   int idx = 0;
@@ -221,6 +264,19 @@ int BrotliTransformDictionaryWord(uint8_t* dst, const uint8_t* word, int len,
         uppercase += step;
         len -= step;
       }
+    } else if (t == BROTLI_TRANSFORM_SHIFT_FIRST) {
+      uint16_t param = (uint16_t)(transforms->params[transform_idx * 2]
+          + (transforms->params[transform_idx * 2 + 1] << 8u));
+      Shift(&dst[idx - len], len, param);
+    } else if (t == BROTLI_TRANSFORM_SHIFT_ALL) {
+      uint16_t param = (uint16_t)(transforms->params[transform_idx * 2]
+          + (transforms->params[transform_idx * 2 + 1] << 8u));
+      uint8_t* shift = &dst[idx - len];
+      while (len > 0) {
+        int step = Shift(shift, len, param);
+        shift += step;
+        len -= step;
+      }
     }
   }
   {
diff --git a/modules/brotli/common/transform.h b/modules/brotli/common/transform.h
index 456c12db9..b6f86cc7d 100644
--- a/modules/brotli/common/transform.h
+++ b/modules/brotli/common/transform.h
@@ -37,6 +37,8 @@ enum BrotliWordTransformType {
   BROTLI_TRANSFORM_OMIT_FIRST_7 = 18,
   BROTLI_TRANSFORM_OMIT_FIRST_8 = 19,
   BROTLI_TRANSFORM_OMIT_FIRST_9 = 20,
+  BROTLI_TRANSFORM_SHIFT_FIRST = 21,
+  BROTLI_TRANSFORM_SHIFT_ALL = 22,
   BROTLI_NUM_TRANSFORM_TYPES  /* Counts transforms, not a transform itself. */
 };
 
@@ -50,6 +52,9 @@ typedef struct BrotliTransforms {
   uint32_t num_transforms;
   /* Each entry is a [prefix_id, transform, suffix_id] triplet. */
   const uint8_t* transforms;
+  /* Shift for BROTLI_TRANSFORM_SHIFT_FIRST and BROTLI_TRANSFORM_SHIFT_ALL,
+     must be NULL if and only if no such transforms are present. */
+  const uint8_t* params;
   /* Indices of transforms like ["", BROTLI_TRANSFORM_OMIT_LAST_#, ""].
      0-th element corresponds to ["", BROTLI_TRANSFORM_IDENTITY, ""].
      -1, if cut-off transform does not exist. */
diff --git a/modules/brotli/common/version.h b/modules/brotli/common/version.h
index 0d0d0c796..01b2998e2 100644
--- a/modules/brotli/common/version.h
+++ b/modules/brotli/common/version.h
@@ -14,13 +14,13 @@
    BrotliEncoderVersion methods. */
 
 /* Semantic version, calculated as (MAJOR << 24) | (MINOR << 12) | PATCH */
-#define BROTLI_VERSION 0x1000007
+#define BROTLI_VERSION 0x1000009
 
 /* This macro is used by build system to produce Libtool-friendly soname. See
    https://www.gnu.org/software/libtool/manual/html_node/Libtool-versioning.html
  */
 
 /* ABI version, calculated as (CURRENT << 24) | (REVISION << 12) | AGE */
-#define BROTLI_ABI_VERSION 0x1007000
+#define BROTLI_ABI_VERSION 0x1009000
 
 #endif  /* BROTLI_COMMON_VERSION_H_ */
diff --git a/modules/brotli/dec/bit_reader.c b/modules/brotli/dec/bit_reader.c
index 722fd906d..7f7b256a4 100644
--- a/modules/brotli/dec/bit_reader.c
+++ b/modules/brotli/dec/bit_reader.c
@@ -15,6 +15,17 @@
 extern "C" {
 #endif
 
+const uint32_t kBrotliBitMask[33] = {   0x00000000,
+    0x00000001, 0x00000003, 0x00000007, 0x0000000F,
+    0x0000001F, 0x0000003F, 0x0000007F, 0x000000FF,
+    0x000001FF, 0x000003FF, 0x000007FF, 0x00000FFF,
+    0x00001FFF, 0x00003FFF, 0x00007FFF, 0x0000FFFF,
+    0x0001FFFF, 0x0003FFFF, 0x0007FFFF, 0x000FFFFF,
+    0x001FFFFF, 0x003FFFFF, 0x007FFFFF, 0x00FFFFFF,
+    0x01FFFFFF, 0x03FFFFFF, 0x07FFFFFF, 0x0FFFFFFF,
+    0x1FFFFFFF, 0x3FFFFFFF, 0x7FFFFFFF, 0xFFFFFFFF
+};
+
 void BrotliInitBitReader(BrotliBitReader* const br) {
   br->val_ = 0;
   br->bit_pos_ = sizeof(br->val_) << 3;
@@ -43,6 +54,23 @@ BROTLI_BOOL BrotliWarmupBitReader(BrotliBitReader* const br) {
   return BROTLI_TRUE;
 }
 
+BROTLI_BOOL BrotliSafeReadBits32Slow(BrotliBitReader* const br,
+    uint32_t n_bits, uint32_t* val) {
+  uint32_t low_val;
+  uint32_t high_val;
+  BrotliBitReaderState memento;
+  BROTLI_DCHECK(n_bits <= 32);
+  BROTLI_DCHECK(n_bits > 24);
+  BrotliBitReaderSaveState(br, &memento);
+  if (!BrotliSafeReadBits(br, 16, &low_val) ||
+      !BrotliSafeReadBits(br, n_bits - 16, &high_val)) {
+    BrotliBitReaderRestoreState(br, &memento);
+    return BROTLI_FALSE;
+  }
+  *val = low_val | (high_val << 16);
+  return BROTLI_TRUE;
+}
+
 #if defined(__cplusplus) || defined(c_plusplus)
 }  /* extern "C" */
 #endif
diff --git a/modules/brotli/dec/bit_reader.h b/modules/brotli/dec/bit_reader.h
index c06e91419..22bc060ca 100644
--- a/modules/brotli/dec/bit_reader.h
+++ b/modules/brotli/dec/bit_reader.h
@@ -11,6 +11,7 @@
 
 #include <string.h>  /* memcpy */
 
+#include "../common/constants.h"
 #include "../common/platform.h"
 #include <brotli/types.h>
 
@@ -20,16 +21,7 @@ extern "C" {
 
 #define BROTLI_SHORT_FILL_BIT_WINDOW_READ (sizeof(brotli_reg_t) >> 1)
 
-static const uint32_t kBitMask[33] = {  0x00000000,
-    0x00000001, 0x00000003, 0x00000007, 0x0000000F,
-    0x0000001F, 0x0000003F, 0x0000007F, 0x000000FF,
-    0x000001FF, 0x000003FF, 0x000007FF, 0x00000FFF,
-    0x00001FFF, 0x00003FFF, 0x00007FFF, 0x0000FFFF,
-    0x0001FFFF, 0x0003FFFF, 0x0007FFFF, 0x000FFFFF,
-    0x001FFFFF, 0x003FFFFF, 0x007FFFFF, 0x00FFFFFF,
-    0x01FFFFFF, 0x03FFFFFF, 0x07FFFFFF, 0x0FFFFFFF,
-    0x1FFFFFFF, 0x3FFFFFFF, 0x7FFFFFFF, 0xFFFFFFFF
-};
+BROTLI_INTERNAL extern const uint32_t kBrotliBitMask[33];
 
 static BROTLI_INLINE uint32_t BitMask(uint32_t n) {
   if (BROTLI_IS_CONSTANT(n) || BROTLI_HAS_UBFX) {
@@ -37,7 +29,7 @@ static BROTLI_INLINE uint32_t BitMask(uint32_t n) {
        "Unsigned Bit Field Extract" UBFX instruction on ARM. */
     return ~((0xFFFFFFFFu) << n);
   } else {
-    return kBitMask[n];
+    return kBrotliBitMask[n];
   }
 }
 
@@ -65,6 +57,12 @@ BROTLI_INTERNAL void BrotliInitBitReader(BrotliBitReader* const br);
    reading. */
 BROTLI_INTERNAL BROTLI_BOOL BrotliWarmupBitReader(BrotliBitReader* const br);
 
+/* Fallback for BrotliSafeReadBits32. Extracted as noninlined method to unburden
+   the main code-path. Never called for RFC brotli streams, required only for
+   "large-window" mode and other extensions. */
+BROTLI_INTERNAL BROTLI_NOINLINE BROTLI_BOOL BrotliSafeReadBits32Slow(
+    BrotliBitReader* const br, uint32_t n_bits, uint32_t* val);
+
 static BROTLI_INLINE void BrotliBitReaderSaveState(
     BrotliBitReader* const from, BrotliBitReaderState* to) {
   to->val_ = from->val_;
@@ -87,8 +85,11 @@ static BROTLI_INLINE uint32_t BrotliGetAvailableBits(
 }
 
 /* Returns amount of unread bytes the bit reader still has buffered from the
-   BrotliInput, including whole bytes in br->val_. */
+   BrotliInput, including whole bytes in br->val_. Result is capped with
+   maximal ring-buffer size (larger number won't be utilized anyway). */
 static BROTLI_INLINE size_t BrotliGetRemainingBytes(BrotliBitReader* br) {
+  static const size_t kCap = (size_t)1 << BROTLI_LARGE_MAX_WBITS;
+  if (br->avail_in > kCap) return kCap;
   return br->avail_in + (BrotliGetAvailableBits(br) >> 3);
 }
 
@@ -237,15 +238,17 @@ static BROTLI_INLINE void BrotliBitReaderUnload(BrotliBitReader* br) {
 static BROTLI_INLINE void BrotliTakeBits(
   BrotliBitReader* const br, uint32_t n_bits, uint32_t* val) {
   *val = (uint32_t)BrotliGetBitsUnmasked(br) & BitMask(n_bits);
-  BROTLI_LOG(("[BrotliReadBits]  %d %d %d val: %6x\n",
+  BROTLI_LOG(("[BrotliTakeBits]  %d %d %d val: %6x\n",
       (int)br->avail_in, (int)br->bit_pos_, (int)n_bits, (int)*val));
   BrotliDropBits(br, n_bits);
 }
 
 /* Reads the specified number of bits from |br| and advances the bit pos.
-   Assumes that there is enough input to perform BrotliFillBitWindow. */
-static BROTLI_INLINE uint32_t BrotliReadBits(
+   Assumes that there is enough input to perform BrotliFillBitWindow.
+   Up to 24 bits are allowed to be requested from this method. */
+static BROTLI_INLINE uint32_t BrotliReadBits24(
     BrotliBitReader* const br, uint32_t n_bits) {
+  BROTLI_DCHECK(n_bits <= 24);
   if (BROTLI_64_BITS || (n_bits <= 16)) {
     uint32_t val;
     BrotliFillBitWindow(br, n_bits);
@@ -262,10 +265,32 @@ static BROTLI_INLINE uint32_t BrotliReadBits(
   }
 }
 
+/* Same as BrotliReadBits24, but allows reading up to 32 bits. */
+static BROTLI_INLINE uint32_t BrotliReadBits32(
+    BrotliBitReader* const br, uint32_t n_bits) {
+  BROTLI_DCHECK(n_bits <= 32);
+  if (BROTLI_64_BITS || (n_bits <= 16)) {
+    uint32_t val;
+    BrotliFillBitWindow(br, n_bits);
+    BrotliTakeBits(br, n_bits, &val);
+    return val;
+  } else {
+    uint32_t low_val;
+    uint32_t high_val;
+    BrotliFillBitWindow(br, 16);
+    BrotliTakeBits(br, 16, &low_val);
+    BrotliFillBitWindow(br, 16);
+    BrotliTakeBits(br, n_bits - 16, &high_val);
+    return low_val | (high_val << 16);
+  }
+}
+
 /* Tries to read the specified amount of bits. Returns BROTLI_FALSE, if there
-   is not enough input. |n_bits| MUST be positive. */
+   is not enough input. |n_bits| MUST be positive.
+   Up to 24 bits are allowed to be requested from this method. */
 static BROTLI_INLINE BROTLI_BOOL BrotliSafeReadBits(
     BrotliBitReader* const br, uint32_t n_bits, uint32_t* val) {
+  BROTLI_DCHECK(n_bits <= 24);
   while (BrotliGetAvailableBits(br) < n_bits) {
     if (!BrotliPullByte(br)) {
       return BROTLI_FALSE;
@@ -275,6 +300,23 @@ static BROTLI_INLINE BROTLI_BOOL BrotliSafeReadBits(
   return BROTLI_TRUE;
 }
 
+/* Same as BrotliSafeReadBits, but allows reading up to 32 bits. */
+static BROTLI_INLINE BROTLI_BOOL BrotliSafeReadBits32(
+    BrotliBitReader* const br, uint32_t n_bits, uint32_t* val) {
+  BROTLI_DCHECK(n_bits <= 32);
+  if (BROTLI_64_BITS || (n_bits <= 24)) {
+    while (BrotliGetAvailableBits(br) < n_bits) {
+      if (!BrotliPullByte(br)) {
+        return BROTLI_FALSE;
+      }
+    }
+    BrotliTakeBits(br, n_bits, val);
+    return BROTLI_TRUE;
+  } else {
+    return BrotliSafeReadBits32Slow(br, n_bits, val);
+  }
+}
+
 /* Advances the bit reader position to the next byte boundary and verifies
    that any skipped bits are set to zero. */
 static BROTLI_INLINE BROTLI_BOOL BrotliJumpToByteBoundary(BrotliBitReader* br) {
diff --git a/modules/brotli/dec/decode.c b/modules/brotli/dec/decode.c
index 08bd76ca1..ae5a3d3fa 100644
--- a/modules/brotli/dec/decode.c
+++ b/modules/brotli/dec/decode.c
@@ -41,7 +41,8 @@ extern "C" {
 
 /* We need the slack region for the following reasons:
     - doing up to two 16-byte copies for fast backward copying
-    - inserting transformed dictionary word (5 prefix + 24 base + 8 suffix) */
+    - inserting transformed dictionary word:
+        5 prefix + 24 base + 8 suffix */
 static const uint32_t kRingBufferWriteAheadSlack = 42;
 
 static const uint8_t kCodeLengthCodeOrder[BROTLI_CODE_LENGTH_CODES] = {
@@ -274,7 +275,8 @@ static BrotliDecoderErrorCode BROTLI_NOINLINE DecodeMetaBlockLength(
             s->loop_counter = i;
             return BROTLI_DECODER_NEEDS_MORE_INPUT;
           }
-          if (i + 1 == s->size_nibbles && s->size_nibbles > 4 && bits == 0) {
+          if (i + 1 == (int)s->size_nibbles && s->size_nibbles > 4 &&
+              bits == 0) {
             return BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_EXUBERANT_NIBBLE);
           }
           s->meta_block_remaining_len |= (int)(bits << (i * 4));
@@ -323,7 +325,8 @@ static BrotliDecoderErrorCode BROTLI_NOINLINE DecodeMetaBlockLength(
             s->loop_counter = i;
             return BROTLI_DECODER_NEEDS_MORE_INPUT;
           }
-          if (i + 1 == s->size_nibbles && s->size_nibbles > 1 && bits == 0) {
+          if (i + 1 == (int)s->size_nibbles && s->size_nibbles > 1 &&
+              bits == 0) {
             return BROTLI_FAILURE(
                 BROTLI_DECODER_ERROR_FORMAT_EXUBERANT_META_NIBBLE);
           }
@@ -470,32 +473,34 @@ static BROTLI_INLINE uint32_t Log2Floor(uint32_t x) {
    Totally 1..4 symbols are read, 1..11 bits each.
    The list of symbols MUST NOT contain duplicates. */
 static BrotliDecoderErrorCode ReadSimpleHuffmanSymbols(
-    uint32_t alphabet_size, uint32_t max_symbol, BrotliDecoderState* s) {
+    uint32_t alphabet_size_max, uint32_t alphabet_size_limit,
+    BrotliDecoderState* s) {
   /* max_bits == 1..11; symbol == 0..3; 1..44 bits will be read. */
   BrotliBitReader* br = &s->br;
-  uint32_t max_bits = Log2Floor(alphabet_size - 1);
-  uint32_t i = s->sub_loop_counter;
-  uint32_t num_symbols = s->symbol;
+  BrotliMetablockHeaderArena* h = &s->arena.header;
+  uint32_t max_bits = Log2Floor(alphabet_size_max - 1);
+  uint32_t i = h->sub_loop_counter;
+  uint32_t num_symbols = h->symbol;
   while (i <= num_symbols) {
     uint32_t v;
     if (BROTLI_PREDICT_FALSE(!BrotliSafeReadBits(br, max_bits, &v))) {
-      s->sub_loop_counter = i;
-      s->substate_huffman = BROTLI_STATE_HUFFMAN_SIMPLE_READ;
+      h->sub_loop_counter = i;
+      h->substate_huffman = BROTLI_STATE_HUFFMAN_SIMPLE_READ;
       return BROTLI_DECODER_NEEDS_MORE_INPUT;
     }
-    if (v >= max_symbol) {
+    if (v >= alphabet_size_limit) {
       return
           BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_SIMPLE_HUFFMAN_ALPHABET);
     }
-    s->symbols_lists_array[i] = (uint16_t)v;
-    BROTLI_LOG_UINT(s->symbols_lists_array[i]);
+    h->symbols_lists_array[i] = (uint16_t)v;
+    BROTLI_LOG_UINT(h->symbols_lists_array[i]);
     ++i;
   }
 
   for (i = 0; i < num_symbols; ++i) {
     uint32_t k = i + 1;
     for (; k <= num_symbols; ++k) {
-      if (s->symbols_lists_array[i] == s->symbols_lists_array[k]) {
+      if (h->symbols_lists_array[i] == h->symbols_lists_array[k]) {
         return BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_SIMPLE_HUFFMAN_SAME);
       }
     }
@@ -588,27 +593,28 @@ static BROTLI_INLINE void ProcessRepeatedCodeLength(uint32_t code_len,
 static BrotliDecoderErrorCode ReadSymbolCodeLengths(
     uint32_t alphabet_size, BrotliDecoderState* s) {
   BrotliBitReader* br = &s->br;
-  uint32_t symbol = s->symbol;
-  uint32_t repeat = s->repeat;
-  uint32_t space = s->space;
-  uint32_t prev_code_len = s->prev_code_len;
-  uint32_t repeat_code_len = s->repeat_code_len;
-  uint16_t* symbol_lists = s->symbol_lists;
-  uint16_t* code_length_histo = s->code_length_histo;
-  int* next_symbol = s->next_symbol;
+  BrotliMetablockHeaderArena* h = &s->arena.header;
+  uint32_t symbol = h->symbol;
+  uint32_t repeat = h->repeat;
+  uint32_t space = h->space;
+  uint32_t prev_code_len = h->prev_code_len;
+  uint32_t repeat_code_len = h->repeat_code_len;
+  uint16_t* symbol_lists = h->symbol_lists;
+  uint16_t* code_length_histo = h->code_length_histo;
+  int* next_symbol = h->next_symbol;
   if (!BrotliWarmupBitReader(br)) {
     return BROTLI_DECODER_NEEDS_MORE_INPUT;
   }
   while (symbol < alphabet_size && space > 0) {
-    const HuffmanCode* p = s->table;
+    const HuffmanCode* p = h->table;
     uint32_t code_len;
     BROTLI_HC_MARK_TABLE_FOR_FAST_LOAD(p);
     if (!BrotliCheckInputAmount(br, BROTLI_SHORT_FILL_BIT_WINDOW_READ)) {
-      s->symbol = symbol;
-      s->repeat = repeat;
-      s->prev_code_len = prev_code_len;
-      s->repeat_code_len = repeat_code_len;
-      s->space = space;
+      h->symbol = symbol;
+      h->repeat = repeat;
+      h->prev_code_len = prev_code_len;
+      h->repeat_code_len = repeat_code_len;
+      h->space = space;
       return BROTLI_DECODER_NEEDS_MORE_INPUT;
     }
     BrotliFillBitWindow16(br);
@@ -630,16 +636,17 @@ static BrotliDecoderErrorCode ReadSymbolCodeLengths(
           symbol_lists, code_length_histo, next_symbol);
     }
   }
-  s->space = space;
+  h->space = space;
   return BROTLI_DECODER_SUCCESS;
 }
 
 static BrotliDecoderErrorCode SafeReadSymbolCodeLengths(
     uint32_t alphabet_size, BrotliDecoderState* s) {
   BrotliBitReader* br = &s->br;
+  BrotliMetablockHeaderArena* h = &s->arena.header;
   BROTLI_BOOL get_byte = BROTLI_FALSE;
-  while (s->symbol < alphabet_size && s->space > 0) {
-    const HuffmanCode* p = s->table;
+  while (h->symbol < alphabet_size && h->space > 0) {
+    const HuffmanCode* p = h->table;
     uint32_t code_len;
     uint32_t available_bits;
     uint32_t bits = 0;
@@ -659,9 +666,9 @@ static BrotliDecoderErrorCode SafeReadSymbolCodeLengths(
     code_len = BROTLI_HC_FAST_LOAD_VALUE(p);  /* code_len == 0..17 */
     if (code_len < BROTLI_REPEAT_PREVIOUS_CODE_LENGTH) {
       BrotliDropBits(br, BROTLI_HC_FAST_LOAD_BITS(p));
-      ProcessSingleCodeLength(code_len, &s->symbol, &s->repeat, &s->space,
-          &s->prev_code_len, s->symbol_lists, s->code_length_histo,
-          s->next_symbol);
+      ProcessSingleCodeLength(code_len, &h->symbol, &h->repeat, &h->space,
+          &h->prev_code_len, h->symbol_lists, h->code_length_histo,
+          h->next_symbol);
     } else {  /* code_len == 16..17, extra_bits == 2..3 */
       uint32_t extra_bits = code_len - 14U;
       uint32_t repeat_delta = (bits >> BROTLI_HC_FAST_LOAD_BITS(p)) &
@@ -672,9 +679,9 @@ static BrotliDecoderErrorCode SafeReadSymbolCodeLengths(
       }
       BrotliDropBits(br, BROTLI_HC_FAST_LOAD_BITS(p) + extra_bits);
       ProcessRepeatedCodeLength(code_len, repeat_delta, alphabet_size,
-          &s->symbol, &s->repeat, &s->space, &s->prev_code_len,
-          &s->repeat_code_len, s->symbol_lists, s->code_length_histo,
-          s->next_symbol);
+          &h->symbol, &h->repeat, &h->space, &h->prev_code_len,
+          &h->repeat_code_len, h->symbol_lists, h->code_length_histo,
+          h->next_symbol);
     }
   }
   return BROTLI_DECODER_SUCCESS;
@@ -684,9 +691,10 @@ static BrotliDecoderErrorCode SafeReadSymbolCodeLengths(
    Each code is 2..4 bits long. In total 30..72 bits are used. */
 static BrotliDecoderErrorCode ReadCodeLengthCodeLengths(BrotliDecoderState* s) {
   BrotliBitReader* br = &s->br;
-  uint32_t num_codes = s->repeat;
-  unsigned space = s->space;
-  uint32_t i = s->sub_loop_counter;
+  BrotliMetablockHeaderArena* h = &s->arena.header;
+  uint32_t num_codes = h->repeat;
+  unsigned space = h->space;
+  uint32_t i = h->sub_loop_counter;
   for (; i < BROTLI_CODE_LENGTH_CODES; ++i) {
     const uint8_t code_len_idx = kCodeLengthCodeOrder[i];
     uint32_t ix;
@@ -699,21 +707,21 @@ static BrotliDecoderErrorCode ReadCodeLengthCodeLengths(BrotliDecoderState* s) {
         ix = 0;
       }
       if (kCodeLengthPrefixLength[ix] > available_bits) {
-        s->sub_loop_counter = i;
-        s->repeat = num_codes;
-        s->space = space;
-        s->substate_huffman = BROTLI_STATE_HUFFMAN_COMPLEX;
+        h->sub_loop_counter = i;
+        h->repeat = num_codes;
+        h->space = space;
+        h->substate_huffman = BROTLI_STATE_HUFFMAN_COMPLEX;
         return BROTLI_DECODER_NEEDS_MORE_INPUT;
       }
     }
     v = kCodeLengthPrefixValue[ix];
     BrotliDropBits(br, kCodeLengthPrefixLength[ix]);
-    s->code_length_code_lengths[code_len_idx] = (uint8_t)v;
-    BROTLI_LOG_ARRAY_INDEX(s->code_length_code_lengths, code_len_idx);
+    h->code_length_code_lengths[code_len_idx] = (uint8_t)v;
+    BROTLI_LOG_ARRAY_INDEX(h->code_length_code_lengths, code_len_idx);
     if (v != 0) {
       space = space - (32U >> v);
       ++num_codes;
-      ++s->code_length_histo[v];
+      ++h->code_length_histo[v];
       if (space - 1U >= 32U) {
         /* space is 0 or wrapped around. */
         break;
@@ -737,49 +745,48 @@ static BrotliDecoderErrorCode ReadCodeLengthCodeLengths(BrotliDecoderState* s) {
          encoded with predefined entropy code. 32 - 74 bits are used.
     B.2) Decoded table is used to decode code lengths of symbols in resulting
          Huffman table. In worst case 3520 bits are read. */
-static BrotliDecoderErrorCode ReadHuffmanCode(uint32_t alphabet_size,
-                                              uint32_t max_symbol,
+static BrotliDecoderErrorCode ReadHuffmanCode(uint32_t alphabet_size_max,
+                                              uint32_t alphabet_size_limit,
                                               HuffmanCode* table,
                                               uint32_t* opt_table_size,
                                               BrotliDecoderState* s) {
   BrotliBitReader* br = &s->br;
-  /* Unnecessary masking, but might be good for safety. */
-  alphabet_size &= 0x7FF;
+  BrotliMetablockHeaderArena* h = &s->arena.header;
   /* State machine. */
   for (;;) {
-    switch (s->substate_huffman) {
+    switch (h->substate_huffman) {
       case BROTLI_STATE_HUFFMAN_NONE:
-        if (!BrotliSafeReadBits(br, 2, &s->sub_loop_counter)) {
+        if (!BrotliSafeReadBits(br, 2, &h->sub_loop_counter)) {
           return BROTLI_DECODER_NEEDS_MORE_INPUT;
         }
-        BROTLI_LOG_UINT(s->sub_loop_counter);
+        BROTLI_LOG_UINT(h->sub_loop_counter);
         /* The value is used as follows:
            1 for simple code;
            0 for no skipping, 2 skips 2 code lengths, 3 skips 3 code lengths */
-        if (s->sub_loop_counter != 1) {
-          s->space = 32;
-          s->repeat = 0;  /* num_codes */
-          memset(&s->code_length_histo[0], 0, sizeof(s->code_length_histo[0]) *
+        if (h->sub_loop_counter != 1) {
+          h->space = 32;
+          h->repeat = 0;  /* num_codes */
+          memset(&h->code_length_histo[0], 0, sizeof(h->code_length_histo[0]) *
               (BROTLI_HUFFMAN_MAX_CODE_LENGTH_CODE_LENGTH + 1));
-          memset(&s->code_length_code_lengths[0], 0,
-              sizeof(s->code_length_code_lengths));
-          s->substate_huffman = BROTLI_STATE_HUFFMAN_COMPLEX;
+          memset(&h->code_length_code_lengths[0], 0,
+              sizeof(h->code_length_code_lengths));
+          h->substate_huffman = BROTLI_STATE_HUFFMAN_COMPLEX;
           continue;
         }
       /* Fall through. */
 
       case BROTLI_STATE_HUFFMAN_SIMPLE_SIZE:
         /* Read symbols, codes & code lengths directly. */
-        if (!BrotliSafeReadBits(br, 2, &s->symbol)) {  /* num_symbols */
-          s->substate_huffman = BROTLI_STATE_HUFFMAN_SIMPLE_SIZE;
+        if (!BrotliSafeReadBits(br, 2, &h->symbol)) {  /* num_symbols */
+          h->substate_huffman = BROTLI_STATE_HUFFMAN_SIMPLE_SIZE;
           return BROTLI_DECODER_NEEDS_MORE_INPUT;
         }
-        s->sub_loop_counter = 0;
+        h->sub_loop_counter = 0;
       /* Fall through. */
 
       case BROTLI_STATE_HUFFMAN_SIMPLE_READ: {
         BrotliDecoderErrorCode result =
-            ReadSimpleHuffmanSymbols(alphabet_size, max_symbol, s);
+            ReadSimpleHuffmanSymbols(alphabet_size_max, alphabet_size_limit, s);
         if (result != BROTLI_DECODER_SUCCESS) {
           return result;
         }
@@ -788,21 +795,21 @@ static BrotliDecoderErrorCode ReadHuffmanCode(uint32_t alphabet_size,
 
       case BROTLI_STATE_HUFFMAN_SIMPLE_BUILD: {
         uint32_t table_size;
-        if (s->symbol == 3) {
+        if (h->symbol == 3) {
           uint32_t bits;
           if (!BrotliSafeReadBits(br, 1, &bits)) {
-            s->substate_huffman = BROTLI_STATE_HUFFMAN_SIMPLE_BUILD;
+            h->substate_huffman = BROTLI_STATE_HUFFMAN_SIMPLE_BUILD;
             return BROTLI_DECODER_NEEDS_MORE_INPUT;
           }
-          s->symbol += bits;
+          h->symbol += bits;
         }
-        BROTLI_LOG_UINT(s->symbol);
+        BROTLI_LOG_UINT(h->symbol);
         table_size = BrotliBuildSimpleHuffmanTable(
-            table, HUFFMAN_TABLE_BITS, s->symbols_lists_array, s->symbol);
+            table, HUFFMAN_TABLE_BITS, h->symbols_lists_array, h->symbol);
         if (opt_table_size) {
           *opt_table_size = table_size;
         }
-        s->substate_huffman = BROTLI_STATE_HUFFMAN_NONE;
+        h->substate_huffman = BROTLI_STATE_HUFFMAN_NONE;
         return BROTLI_DECODER_SUCCESS;
       }
 
@@ -813,44 +820,45 @@ static BrotliDecoderErrorCode ReadHuffmanCode(uint32_t alphabet_size,
         if (result != BROTLI_DECODER_SUCCESS) {
           return result;
         }
-        BrotliBuildCodeLengthsHuffmanTable(s->table,
-                                           s->code_length_code_lengths,
-                                           s->code_length_histo);
-        memset(&s->code_length_histo[0], 0, sizeof(s->code_length_histo));
+        BrotliBuildCodeLengthsHuffmanTable(h->table,
+                                           h->code_length_code_lengths,
+                                           h->code_length_histo);
+        memset(&h->code_length_histo[0], 0, sizeof(h->code_length_histo));
         for (i = 0; i <= BROTLI_HUFFMAN_MAX_CODE_LENGTH; ++i) {
-          s->next_symbol[i] = (int)i - (BROTLI_HUFFMAN_MAX_CODE_LENGTH + 1);
-          s->symbol_lists[s->next_symbol[i]] = 0xFFFF;
+          h->next_symbol[i] = (int)i - (BROTLI_HUFFMAN_MAX_CODE_LENGTH + 1);
+          h->symbol_lists[h->next_symbol[i]] = 0xFFFF;
         }
 
-        s->symbol = 0;
-        s->prev_code_len = BROTLI_INITIAL_REPEATED_CODE_LENGTH;
-        s->repeat = 0;
-        s->repeat_code_len = 0;
-        s->space = 32768;
-        s->substate_huffman = BROTLI_STATE_HUFFMAN_LENGTH_SYMBOLS;
+        h->symbol = 0;
+        h->prev_code_len = BROTLI_INITIAL_REPEATED_CODE_LENGTH;
+        h->repeat = 0;
+        h->repeat_code_len = 0;
+        h->space = 32768;
+        h->substate_huffman = BROTLI_STATE_HUFFMAN_LENGTH_SYMBOLS;
       }
       /* Fall through. */
 
       case BROTLI_STATE_HUFFMAN_LENGTH_SYMBOLS: {
         uint32_t table_size;
-        BrotliDecoderErrorCode result = ReadSymbolCodeLengths(max_symbol, s);
+        BrotliDecoderErrorCode result = ReadSymbolCodeLengths(
+            alphabet_size_limit, s);
         if (result == BROTLI_DECODER_NEEDS_MORE_INPUT) {
-          result = SafeReadSymbolCodeLengths(max_symbol, s);
+          result = SafeReadSymbolCodeLengths(alphabet_size_limit, s);
         }
         if (result != BROTLI_DECODER_SUCCESS) {
           return result;
         }
 
-        if (s->space != 0) {
-          BROTLI_LOG(("[ReadHuffmanCode] space = %d\n", (int)s->space));
+        if (h->space != 0) {
+          BROTLI_LOG(("[ReadHuffmanCode] space = %d\n", (int)h->space));
           return BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_HUFFMAN_SPACE);
         }
         table_size = BrotliBuildHuffmanTable(
-            table, HUFFMAN_TABLE_BITS, s->symbol_lists, s->code_length_histo);
+            table, HUFFMAN_TABLE_BITS, h->symbol_lists, h->code_length_histo);
         if (opt_table_size) {
           *opt_table_size = table_size;
         }
-        s->substate_huffman = BROTLI_STATE_HUFFMAN_NONE;
+        h->substate_huffman = BROTLI_STATE_HUFFMAN_NONE;
         return BROTLI_DECODER_SUCCESS;
       }
 
@@ -867,8 +875,8 @@ static BROTLI_INLINE uint32_t ReadBlockLength(const HuffmanCode* table,
   uint32_t code;
   uint32_t nbits;
   code = ReadSymbol(table, br);
-  nbits = kBlockLengthPrefixCode[code].nbits;  /* nbits == 2..24 */
-  return kBlockLengthPrefixCode[code].offset + BrotliReadBits(br, nbits);
+  nbits = _kBrotliPrefixCodeRanges[code].nbits;  /* nbits == 2..24 */
+  return _kBrotliPrefixCodeRanges[code].offset + BrotliReadBits24(br, nbits);
 }
 
 /* WARNING: if state is not BROTLI_STATE_READ_BLOCK_LENGTH_NONE, then
@@ -886,13 +894,14 @@ static BROTLI_INLINE BROTLI_BOOL SafeReadBlockLength(
   }
   {
     uint32_t bits;
-    uint32_t nbits = kBlockLengthPrefixCode[index].nbits;  /* nbits == 2..24 */
+    uint32_t nbits = _kBrotliPrefixCodeRanges[index].nbits;
+    uint32_t offset = _kBrotliPrefixCodeRanges[index].offset;
     if (!BrotliSafeReadBits(br, nbits, &bits)) {
       s->block_length_index = index;
       s->substate_read_block_length = BROTLI_STATE_READ_BLOCK_LENGTH_SUFFIX;
       return BROTLI_FALSE;
     }
-    *result = kBlockLengthPrefixCode[index].offset + bits;
+    *result = offset + bits;
     s->substate_read_block_length = BROTLI_STATE_READ_BLOCK_LENGTH_NONE;
     return BROTLI_TRUE;
   }
@@ -952,22 +961,22 @@ static BROTLI_NOINLINE void InverseMoveToFrontTransform(
 /* Decodes a series of Huffman table using ReadHuffmanCode function. */
 static BrotliDecoderErrorCode HuffmanTreeGroupDecode(
     HuffmanTreeGroup* group, BrotliDecoderState* s) {
-  if (s->substate_tree_group != BROTLI_STATE_TREE_GROUP_LOOP) {
-    s->next = group->codes;
-    s->htree_index = 0;
-    s->substate_tree_group = BROTLI_STATE_TREE_GROUP_LOOP;
+  BrotliMetablockHeaderArena* h = &s->arena.header;
+  if (h->substate_tree_group != BROTLI_STATE_TREE_GROUP_LOOP) {
+    h->next = group->codes;
+    h->htree_index = 0;
+    h->substate_tree_group = BROTLI_STATE_TREE_GROUP_LOOP;
   }
-  while (s->htree_index < group->num_htrees) {
+  while (h->htree_index < group->num_htrees) {
     uint32_t table_size;
-    BrotliDecoderErrorCode result =
-        ReadHuffmanCode(group->alphabet_size, group->max_symbol,
-                        s->next, &table_size, s);
+    BrotliDecoderErrorCode result = ReadHuffmanCode(group->alphabet_size_max,
+        group->alphabet_size_limit, h->next, &table_size, s);
     if (result != BROTLI_DECODER_SUCCESS) return result;
-    group->htrees[s->htree_index] = s->next;
-    s->next += table_size;
-    ++s->htree_index;
+    group->htrees[h->htree_index] = h->next;
+    h->next += table_size;
+    ++h->htree_index;
   }
-  s->substate_tree_group = BROTLI_STATE_TREE_GROUP_NONE;
+  h->substate_tree_group = BROTLI_STATE_TREE_GROUP_NONE;
   return BROTLI_DECODER_SUCCESS;
 }
 
@@ -985,15 +994,16 @@ static BrotliDecoderErrorCode DecodeContextMap(uint32_t context_map_size,
                                                BrotliDecoderState* s) {
   BrotliBitReader* br = &s->br;
   BrotliDecoderErrorCode result = BROTLI_DECODER_SUCCESS;
+  BrotliMetablockHeaderArena* h = &s->arena.header;
 
-  switch ((int)s->substate_context_map) {
+  switch ((int)h->substate_context_map) {
     case BROTLI_STATE_CONTEXT_MAP_NONE:
       result = DecodeVarLenUint8(s, br, num_htrees);
       if (result != BROTLI_DECODER_SUCCESS) {
         return result;
       }
       (*num_htrees)++;
-      s->context_index = 0;
+      h->context_index = 0;
       BROTLI_LOG_UINT(context_map_size);
       BROTLI_LOG_UINT(*num_htrees);
       *context_map_arg =
@@ -1005,7 +1015,7 @@ static BrotliDecoderErrorCode DecodeContextMap(uint32_t context_map_size,
         memset(*context_map_arg, 0, (size_t)context_map_size);
         return BROTLI_DECODER_SUCCESS;
       }
-      s->substate_context_map = BROTLI_STATE_CONTEXT_MAP_READ_PREFIX;
+      h->substate_context_map = BROTLI_STATE_CONTEXT_MAP_READ_PREFIX;
     /* Fall through. */
 
     case BROTLI_STATE_CONTEXT_MAP_READ_PREFIX: {
@@ -1016,38 +1026,38 @@ static BrotliDecoderErrorCode DecodeContextMap(uint32_t context_map_size,
         return BROTLI_DECODER_NEEDS_MORE_INPUT;
       }
       if ((bits & 1) != 0) { /* Use RLE for zeros. */
-        s->max_run_length_prefix = (bits >> 1) + 1;
+        h->max_run_length_prefix = (bits >> 1) + 1;
         BrotliDropBits(br, 5);
       } else {
-        s->max_run_length_prefix = 0;
+        h->max_run_length_prefix = 0;
         BrotliDropBits(br, 1);
       }
-      BROTLI_LOG_UINT(s->max_run_length_prefix);
-      s->substate_context_map = BROTLI_STATE_CONTEXT_MAP_HUFFMAN;
+      BROTLI_LOG_UINT(h->max_run_length_prefix);
+      h->substate_context_map = BROTLI_STATE_CONTEXT_MAP_HUFFMAN;
     }
     /* Fall through. */
 
     case BROTLI_STATE_CONTEXT_MAP_HUFFMAN: {
-      uint32_t alphabet_size = *num_htrees + s->max_run_length_prefix;
+      uint32_t alphabet_size = *num_htrees + h->max_run_length_prefix;
       result = ReadHuffmanCode(alphabet_size, alphabet_size,
-                               s->context_map_table, NULL, s);
+                               h->context_map_table, NULL, s);
       if (result != BROTLI_DECODER_SUCCESS) return result;
-      s->code = 0xFFFF;
-      s->substate_context_map = BROTLI_STATE_CONTEXT_MAP_DECODE;
+      h->code = 0xFFFF;
+      h->substate_context_map = BROTLI_STATE_CONTEXT_MAP_DECODE;
     }
     /* Fall through. */
 
     case BROTLI_STATE_CONTEXT_MAP_DECODE: {
-      uint32_t context_index = s->context_index;
-      uint32_t max_run_length_prefix = s->max_run_length_prefix;
+      uint32_t context_index = h->context_index;
+      uint32_t max_run_length_prefix = h->max_run_length_prefix;
       uint8_t* context_map = *context_map_arg;
-      uint32_t code = s->code;
+      uint32_t code = h->code;
       BROTLI_BOOL skip_preamble = (code != 0xFFFF);
       while (context_index < context_map_size || skip_preamble) {
         if (!skip_preamble) {
-          if (!SafeReadSymbol(s->context_map_table, br, &code)) {
-            s->code = 0xFFFF;
-            s->context_index = context_index;
+          if (!SafeReadSymbol(h->context_map_table, br, &code)) {
+            h->code = 0xFFFF;
+            h->context_index = context_index;
             return BROTLI_DECODER_NEEDS_MORE_INPUT;
           }
           BROTLI_LOG_UINT(code);
@@ -1068,8 +1078,8 @@ static BrotliDecoderErrorCode DecodeContextMap(uint32_t context_map_size,
         {
           uint32_t reps;
           if (!BrotliSafeReadBits(br, code, &reps)) {
-            s->code = code;
-            s->context_index = context_index;
+            h->code = code;
+            h->context_index = context_index;
             return BROTLI_DECODER_NEEDS_MORE_INPUT;
           }
           reps += 1U << code;
@@ -1089,13 +1099,13 @@ static BrotliDecoderErrorCode DecodeContextMap(uint32_t context_map_size,
     case BROTLI_STATE_CONTEXT_MAP_TRANSFORM: {
       uint32_t bits;
       if (!BrotliSafeReadBits(br, 1, &bits)) {
-        s->substate_context_map = BROTLI_STATE_CONTEXT_MAP_TRANSFORM;
+        h->substate_context_map = BROTLI_STATE_CONTEXT_MAP_TRANSFORM;
         return BROTLI_DECODER_NEEDS_MORE_INPUT;
       }
       if (bits != 0) {
         InverseMoveToFrontTransform(*context_map_arg, context_map_size, s);
       }
-      s->substate_context_map = BROTLI_STATE_CONTEXT_MAP_NONE;
+      h->substate_context_map = BROTLI_STATE_CONTEXT_MAP_NONE;
       return BROTLI_DECODER_SUCCESS;
     }
 
@@ -1457,32 +1467,28 @@ static BrotliDecoderErrorCode ReadContextModes(BrotliDecoderState* s) {
 }
 
 static BROTLI_INLINE void TakeDistanceFromRingBuffer(BrotliDecoderState* s) {
-  if (s->distance_code == 0) {
-    --s->dist_rb_idx;
-    s->distance_code = s->dist_rb[s->dist_rb_idx & 3];
+  int offset = s->distance_code - 3;
+  if (s->distance_code <= 3) {
     /* Compensate double distance-ring-buffer roll for dictionary items. */
-    s->distance_context = 1;
+    s->distance_context = 1 >> s->distance_code;
+    s->distance_code = s->dist_rb[(s->dist_rb_idx - offset) & 3];
+    s->dist_rb_idx -= s->distance_context;
   } else {
-    int distance_code = s->distance_code << 1;
-    /* kDistanceShortCodeIndexOffset has 2-bit values from LSB:
-        3, 2, 1, 0, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2 */
-    const uint32_t kDistanceShortCodeIndexOffset = 0xAAAFFF1B;
-    /* kDistanceShortCodeValueOffset has 2-bit values from LSB:
-       -0, 0,-0, 0,-1, 1,-2, 2,-3, 3,-1, 1,-2, 2,-3, 3 */
-    const uint32_t kDistanceShortCodeValueOffset = 0xFA5FA500;
-    int v = (s->dist_rb_idx +
-        (int)(kDistanceShortCodeIndexOffset >> distance_code)) & 0x3;
-    s->distance_code = s->dist_rb[v];
-    v = (int)(kDistanceShortCodeValueOffset >> distance_code) & 0x3;
-    if ((distance_code & 0x3) != 0) {
-      s->distance_code += v;
+    int index_delta = 3;
+    int delta;
+    int base = s->distance_code - 10;
+    if (s->distance_code < 10) {
+      base = s->distance_code - 4;
     } else {
-      s->distance_code -= v;
-      if (s->distance_code <= 0) {
-        /* A huge distance will cause a BROTLI_FAILURE() soon.
-           This is a little faster than failing here. */
-        s->distance_code = 0x7FFFFFFF;
-      }
+      index_delta = 2;
+    }
+    /* Unpack one of six 4-bit values. */
+    delta = ((0x605142 >> (4 * base)) & 0xF) - 3;
+    s->distance_code = s->dist_rb[(s->dist_rb_idx + index_delta) & 0x3] + delta;
+    if (s->distance_code <= 0) {
+      /* A huge distance will cause a BROTLI_FAILURE() soon.
+         This is a little faster than failing here. */
+      s->distance_code = 0x7FFFFFFF;
     }
   }
 }
@@ -1497,62 +1503,153 @@ static BROTLI_INLINE BROTLI_BOOL SafeReadBits(
   }
 }
 
+static BROTLI_INLINE BROTLI_BOOL SafeReadBits32(
+    BrotliBitReader* const br, uint32_t n_bits, uint32_t* val) {
+  if (n_bits != 0) {
+    return BrotliSafeReadBits32(br, n_bits, val);
+  } else {
+    *val = 0;
+    return BROTLI_TRUE;
+  }
+}
+
+/*
+   RFC 7932 Section 4 with "..." shortenings and "[]" emendations.
+
+   Each distance ... is represented with a pair <distance code, extra bits>...
+   The distance code is encoded using a prefix code... The number of extra bits
+   can be 0..24... Two additional parameters: NPOSTFIX (0..3), and ...
+   NDIRECT (0..120) ... are encoded in the meta-block header...
+
+   The first 16 distance symbols ... reference past distances... ring buffer ...
+   Next NDIRECT distance symbols ... represent distances from 1 to NDIRECT...
+   [For] distance symbols 16 + NDIRECT and greater ... the number of extra bits
+   ... is given by the following formula:
+
+   [ xcode = dcode - NDIRECT - 16 ]
+   ndistbits = 1 + [ xcode ] >> (NPOSTFIX + 1)
+
+   ...
+*/
+
+/*
+   RFC 7932 Section 9.2 with "..." shortenings and "[]" emendations.
+
+   ... to get the actual value of the parameter NDIRECT, left-shift this
+   four-bit number by NPOSTFIX bits ...
+*/
+
+/* Remaining formulas from RFC 7932 Section 4 could be rewritten as following:
+
+     alphabet_size = 16 + NDIRECT + (max_distbits << (NPOSTFIX + 1))
+
+     half = ((xcode >> NPOSTFIX) & 1) << ndistbits
+     postfix = xcode & ((1 << NPOSTFIX) - 1)
+     range_start = 2 * (1 << ndistbits - 1 - 1)
+
+     distance = (range_start + half + extra) << NPOSTFIX + postfix + NDIRECT + 1
+
+   NB: ndistbits >= 1 -> range_start >= 0
+   NB: range_start has factor 2, as the range is covered by 2 "halves"
+   NB: extra -1 offset in range_start formula covers the absence of
+       ndistbits = 0 case
+   NB: when NPOSTFIX = 0, NDIRECT is not greater than 15
+
+   In other words, xcode has the following binary structure - XXXHPPP:
+    - XXX represent the number of extra distance bits
+    - H selects upper / lower range of distances
+    - PPP represent "postfix"
+
+  "Regular" distance encoding has NPOSTFIX = 0; omitting the postfix part
+  simplifies distance calculation.
+
+  Using NPOSTFIX > 0 allows cheaper encoding of regular structures, e.g. where
+  most of distances have the same reminder of division by 2/4/8. For example,
+  the table of int32_t values that come from different sources; if it is likely
+  that 3 highest bytes of values from the same source are the same, then
+  copy distance often looks like 4x + y.
+
+  Distance calculation could be rewritten to:
+
+    ndistbits = NDISTBITS(NDIRECT, NPOSTFIX)[dcode]
+    distance = OFFSET(NDIRECT, NPOSTFIX)[dcode] + extra << NPOSTFIX
+
+  NDISTBITS and OFFSET could be pre-calculated, as NDIRECT and NPOSTFIX could
+  change only once per meta-block.
+*/
+
+/* Calculates distance lookup table.
+   NB: it is possible to have all 64 tables precalculated. */
+static void CalculateDistanceLut(BrotliDecoderState* s) {
+  BrotliMetablockBodyArena* b = &s->arena.body;
+  uint32_t npostfix = s->distance_postfix_bits;
+  uint32_t ndirect = s->num_direct_distance_codes;
+  uint32_t alphabet_size_limit = s->distance_hgroup.alphabet_size_limit;
+  uint32_t postfix = 1u << npostfix;
+  uint32_t j;
+  uint32_t bits = 1;
+  uint32_t half = 0;
+
+  /* Skip short codes. */
+  uint32_t i = BROTLI_NUM_DISTANCE_SHORT_CODES;
+
+  /* Fill direct codes. */
+  for (j = 0; j < ndirect; ++j) {
+    b->dist_extra_bits[i] = 0;
+    b->dist_offset[i] = j + 1;
+    ++i;
+  }
+
+  /* Fill regular distance codes. */
+  while (i < alphabet_size_limit) {
+    uint32_t base = ndirect + ((((2 + half) << bits) - 4) << npostfix) + 1;
+    /* Always fill the complete group. */
+    for (j = 0; j < postfix; ++j) {
+      b->dist_extra_bits[i] = (uint8_t)bits;
+      b->dist_offset[i] = base + j;
+      ++i;
+    }
+    bits = bits + half;
+    half = half ^ 1;
+  }
+}
+
 /* Precondition: s->distance_code < 0. */
 static BROTLI_INLINE BROTLI_BOOL ReadDistanceInternal(
     int safe, BrotliDecoderState* s, BrotliBitReader* br) {
-  int distval;
+  BrotliMetablockBodyArena* b = &s->arena.body;
+  uint32_t code;
+  uint32_t bits;
   BrotliBitReaderState memento;
   HuffmanCode* distance_tree = s->distance_hgroup.htrees[s->dist_htree_index];
   if (!safe) {
-    s->distance_code = (int)ReadSymbol(distance_tree, br);
+    code = ReadSymbol(distance_tree, br);
   } else {
-    uint32_t code;
     BrotliBitReaderSaveState(br, &memento);
     if (!SafeReadSymbol(distance_tree, br, &code)) {
       return BROTLI_FALSE;
     }
-    s->distance_code = (int)code;
   }
+  --s->block_length[2];
   /* Convert the distance code to the actual distance by possibly
-     looking up past distances from the s->ringbuffer. */
+     looking up past distances from the s->dist_rb. */
   s->distance_context = 0;
-  if ((s->distance_code & ~0xF) == 0) {
+  if ((code & ~0xFu) == 0) {
+    s->distance_code = (int)code;
     TakeDistanceFromRingBuffer(s);
-    --s->block_length[2];
     return BROTLI_TRUE;
   }
-  distval = s->distance_code - (int)s->num_direct_distance_codes;
-  if (distval >= 0) {
-    uint32_t nbits;
-    int postfix;
-    int offset;
-    if (!safe && (s->distance_postfix_bits == 0)) {
-      nbits = ((uint32_t)distval >> 1) + 1;
-      offset = ((2 + (distval & 1)) << nbits) - 4;
-      s->distance_code = (int)s->num_direct_distance_codes + offset +
-                         (int)BrotliReadBits(br, nbits);
-    } else {
-      /* This branch also works well when s->distance_postfix_bits == 0. */
-      uint32_t bits;
-      postfix = distval & s->distance_postfix_mask;
-      distval >>= s->distance_postfix_bits;
-      nbits = ((uint32_t)distval >> 1) + 1;
-      if (safe) {
-        if (!SafeReadBits(br, nbits, &bits)) {
-          s->distance_code = -1;  /* Restore precondition. */
-          BrotliBitReaderRestoreState(br, &memento);
-          return BROTLI_FALSE;
-        }
-      } else {
-        bits = BrotliReadBits(br, nbits);
-      }
-      offset = ((2 + (distval & 1)) << nbits) - 4;
-      s->distance_code = (int)s->num_direct_distance_codes +
-          ((offset + (int)bits) << s->distance_postfix_bits) + postfix;
+  if (!safe) {
+    bits = BrotliReadBits32(br, b->dist_extra_bits[code]);
+  } else {
+    if (!SafeReadBits32(br, b->dist_extra_bits[code], &bits)) {
+      ++s->block_length[2];
+      BrotliBitReaderRestoreState(br, &memento);
+      return BROTLI_FALSE;
     }
   }
-  s->distance_code = s->distance_code - BROTLI_NUM_DISTANCE_SHORT_CODES + 1;
-  --s->block_length[2];
+  s->distance_code =
+      (int)(b->dist_offset[code] + (bits << s->distance_postfix_bits));
   return BROTLI_TRUE;
 }
 
@@ -1588,9 +1685,9 @@ static BROTLI_INLINE BROTLI_BOOL ReadCommandInternal(
   *insert_length = v.insert_len_offset;
   if (!safe) {
     if (BROTLI_PREDICT_FALSE(v.insert_len_extra_bits != 0)) {
-      insert_len_extra = BrotliReadBits(br, v.insert_len_extra_bits);
+      insert_len_extra = BrotliReadBits24(br, v.insert_len_extra_bits);
     }
-    copy_length = BrotliReadBits(br, v.copy_len_extra_bits);
+    copy_length = BrotliReadBits24(br, v.copy_len_extra_bits);
   } else {
     if (!SafeReadBits(br, v.insert_len_extra_bits, &insert_len_extra) ||
         !SafeReadBits(br, v.copy_len_extra_bits, &copy_length)) {
@@ -1935,21 +2032,6 @@ static BROTLI_NOINLINE BrotliDecoderErrorCode SafeProcessCommands(
   return ProcessCommandsInternal(1, s);
 }
 
-/* Returns the maximum number of distance symbols which can only represent
-   distances not exceeding BROTLI_MAX_ALLOWED_DISTANCE. */
-static uint32_t BrotliMaxDistanceSymbol(uint32_t ndirect, uint32_t npostfix) {
-  static const uint32_t bound[BROTLI_MAX_NPOSTFIX + 1] = {0, 4, 12, 28};
-  static const uint32_t diff[BROTLI_MAX_NPOSTFIX + 1] = {73, 126, 228, 424};
-  uint32_t postfix = 1U << npostfix;
-  if (ndirect < bound[npostfix]) {
-    return ndirect + diff[npostfix] + postfix;
-  } else if (ndirect > bound[npostfix] + postfix) {
-    return ndirect + diff[npostfix];
-  } else {
-    return bound[npostfix] + diff[npostfix] + postfix;
-  }
-}
-
 BrotliDecoderResult BrotliDecoderDecompress(
     size_t encoded_size, const uint8_t* encoded_buffer, size_t* decoded_size,
     uint8_t* decoded_buffer) {
@@ -2167,33 +2249,23 @@ BrotliDecoderResult BrotliDecoderDecompressStream(
           s->state = BROTLI_STATE_UNCOMPRESSED;
           break;
         }
+        s->state = BROTLI_STATE_BEFORE_COMPRESSED_METABLOCK_HEADER;
+      /* Fall through. */
+
+      case BROTLI_STATE_BEFORE_COMPRESSED_METABLOCK_HEADER: {
+        BrotliMetablockHeaderArena* h = &s->arena.header;
         s->loop_counter = 0;
+        /* Initialize compressed metablock header arena. */
+        h->sub_loop_counter = 0;
+        /* Make small negative indexes addressable. */
+        h->symbol_lists =
+            &h->symbols_lists_array[BROTLI_HUFFMAN_MAX_CODE_LENGTH + 1];
+        h->substate_huffman = BROTLI_STATE_HUFFMAN_NONE;
+        h->substate_tree_group = BROTLI_STATE_TREE_GROUP_NONE;
+        h->substate_context_map = BROTLI_STATE_CONTEXT_MAP_NONE;
         s->state = BROTLI_STATE_HUFFMAN_CODE_0;
-        break;
-
-      case BROTLI_STATE_UNCOMPRESSED: {
-        result = CopyUncompressedBlockToOutput(
-            available_out, next_out, total_out, s);
-        if (result != BROTLI_DECODER_SUCCESS) {
-          break;
-        }
-        s->state = BROTLI_STATE_METABLOCK_DONE;
-        break;
       }
-
-      case BROTLI_STATE_METADATA:
-        for (; s->meta_block_remaining_len > 0; --s->meta_block_remaining_len) {
-          uint32_t bits;
-          /* Read one byte and ignore it. */
-          if (!BrotliSafeReadBits(br, 8, &bits)) {
-            result = BROTLI_DECODER_NEEDS_MORE_INPUT;
-            break;
-          }
-        }
-        if (result == BROTLI_DECODER_SUCCESS) {
-          s->state = BROTLI_STATE_METABLOCK_DONE;
-        }
-        break;
+      /* Fall through. */
 
       case BROTLI_STATE_HUFFMAN_CODE_0:
         if (s->loop_counter >= 3) {
@@ -2247,6 +2319,30 @@ BrotliDecoderResult BrotliDecoderDecompressStream(
         break;
       }
 
+      case BROTLI_STATE_UNCOMPRESSED: {
+        result = CopyUncompressedBlockToOutput(
+            available_out, next_out, total_out, s);
+        if (result != BROTLI_DECODER_SUCCESS) {
+          break;
+        }
+        s->state = BROTLI_STATE_METABLOCK_DONE;
+        break;
+      }
+
+      case BROTLI_STATE_METADATA:
+        for (; s->meta_block_remaining_len > 0; --s->meta_block_remaining_len) {
+          uint32_t bits;
+          /* Read one byte and ignore it. */
+          if (!BrotliSafeReadBits(br, 8, &bits)) {
+            result = BROTLI_DECODER_NEEDS_MORE_INPUT;
+            break;
+          }
+        }
+        if (result == BROTLI_DECODER_SUCCESS) {
+          s->state = BROTLI_STATE_METABLOCK_DONE;
+        }
+        break;
+
       case BROTLI_STATE_METABLOCK_HEADER_2: {
         uint32_t bits;
         if (!BrotliSafeReadBits(br, 6, &bits)) {
@@ -2255,11 +2351,9 @@ BrotliDecoderResult BrotliDecoderDecompressStream(
         }
         s->distance_postfix_bits = bits & BitMask(2);
         bits >>= 2;
-        s->num_direct_distance_codes = BROTLI_NUM_DISTANCE_SHORT_CODES +
-            (bits << s->distance_postfix_bits);
+        s->num_direct_distance_codes = bits << s->distance_postfix_bits;
         BROTLI_LOG_UINT(s->num_direct_distance_codes);
         BROTLI_LOG_UINT(s->distance_postfix_bits);
-        s->distance_postfix_mask = (int)BitMask(s->distance_postfix_bits);
         s->context_modes =
             (uint8_t*)BROTLI_DECODER_ALLOC(s, (size_t)s->num_block_types[0]);
         if (s->context_modes == 0) {
@@ -2291,17 +2385,19 @@ BrotliDecoderResult BrotliDecoderDecompressStream(
       /* Fall through. */
 
       case BROTLI_STATE_CONTEXT_MAP_2: {
-        uint32_t num_direct_codes =
-            s->num_direct_distance_codes - BROTLI_NUM_DISTANCE_SHORT_CODES;
-        uint32_t num_distance_codes = BROTLI_DISTANCE_ALPHABET_SIZE(
-            s->distance_postfix_bits, num_direct_codes,
-            (s->large_window ? BROTLI_LARGE_MAX_DISTANCE_BITS :
-                               BROTLI_MAX_DISTANCE_BITS));
-        uint32_t max_distance_symbol = (s->large_window ?
-            BrotliMaxDistanceSymbol(
-                num_direct_codes, s->distance_postfix_bits) :
-            num_distance_codes);
+        uint32_t npostfix = s->distance_postfix_bits;
+        uint32_t ndirect = s->num_direct_distance_codes;
+        uint32_t distance_alphabet_size_max = BROTLI_DISTANCE_ALPHABET_SIZE(
+            npostfix, ndirect, BROTLI_MAX_DISTANCE_BITS);
+        uint32_t distance_alphabet_size_limit = distance_alphabet_size_max;
         BROTLI_BOOL allocation_success = BROTLI_TRUE;
+        if (s->large_window) {
+          BrotliDistanceCodeLimit limit = BrotliCalculateDistanceCodeLimit(
+              BROTLI_MAX_ALLOWED_DISTANCE, npostfix, ndirect);
+          distance_alphabet_size_max = BROTLI_DISTANCE_ALPHABET_SIZE(
+              npostfix, ndirect, BROTLI_LARGE_MAX_DISTANCE_BITS);
+          distance_alphabet_size_limit = limit.max_alphabet_size;
+        }
         result = DecodeContextMap(
             s->num_block_types[2] << BROTLI_DISTANCE_CONTEXT_BITS,
             &s->num_dist_htrees, &s->dist_context_map, s);
@@ -2315,8 +2411,8 @@ BrotliDecoderResult BrotliDecoderDecompressStream(
             s, &s->insert_copy_hgroup, BROTLI_NUM_COMMAND_SYMBOLS,
             BROTLI_NUM_COMMAND_SYMBOLS, s->num_block_types[1]);
         allocation_success &= BrotliDecoderHuffmanTreeGroupInit(
-            s, &s->distance_hgroup, num_distance_codes,
-            max_distance_symbol, s->num_dist_htrees);
+            s, &s->distance_hgroup, distance_alphabet_size_max,
+            distance_alphabet_size_limit, s->num_dist_htrees);
         if (!allocation_success) {
           return SaveErrorCode(s,
               BROTLI_FAILURE(BROTLI_DECODER_ERROR_ALLOC_TREE_GROUPS));
@@ -2338,18 +2434,24 @@ BrotliDecoderResult BrotliDecoderDecompressStream(
         result = HuffmanTreeGroupDecode(hgroup, s);
         if (result != BROTLI_DECODER_SUCCESS) break;
         s->loop_counter++;
-        if (s->loop_counter >= 3) {
-          PrepareLiteralDecoding(s);
-          s->dist_context_map_slice = s->dist_context_map;
-          s->htree_command = s->insert_copy_hgroup.htrees[0];
-          if (!BrotliEnsureRingBuffer(s)) {
-            result = BROTLI_FAILURE(BROTLI_DECODER_ERROR_ALLOC_RING_BUFFER_2);
-            break;
-          }
-          s->state = BROTLI_STATE_COMMAND_BEGIN;
+        if (s->loop_counter < 3) {
+          break;
         }
-        break;
+        s->state = BROTLI_STATE_BEFORE_COMPRESSED_METABLOCK_BODY;
       }
+      /* Fall through. */
+
+      case BROTLI_STATE_BEFORE_COMPRESSED_METABLOCK_BODY:
+        PrepareLiteralDecoding(s);
+        s->dist_context_map_slice = s->dist_context_map;
+        s->htree_command = s->insert_copy_hgroup.htrees[0];
+        if (!BrotliEnsureRingBuffer(s)) {
+          result = BROTLI_FAILURE(BROTLI_DECODER_ERROR_ALLOC_RING_BUFFER_2);
+          break;
+        }
+        CalculateDistanceLut(s);
+        s->state = BROTLI_STATE_COMMAND_BEGIN;
+      /* Fall through. */
 
       case BROTLI_STATE_COMMAND_BEGIN:
       /* Fall through. */
diff --git a/modules/brotli/dec/huffman.h b/modules/brotli/dec/huffman.h
index b9f0716c1..a8fbc4534 100644
--- a/modules/brotli/dec/huffman.h
+++ b/modules/brotli/dec/huffman.h
@@ -18,12 +18,6 @@ extern "C" {
 
 #define BROTLI_HUFFMAN_MAX_CODE_LENGTH 15
 
-/* Maximum possible Huffman table size for an alphabet size of (index * 32),
-   max code length 15 and root table bits 8. */
-static const uint16_t kMaxHuffmanTableSize[] = {
-  256, 402, 436, 468, 500, 534, 566, 598, 630, 662, 694, 726, 758, 790, 822,
-  854, 886, 920, 952, 984, 1016, 1048, 1080, 1112, 1144, 1176, 1208, 1240, 1272,
-  1304, 1336, 1368, 1400, 1432, 1464, 1496, 1528};
 /* BROTLI_NUM_BLOCK_LEN_SYMBOLS == 26 */
 #define BROTLI_HUFFMAN_MAX_SIZE_26 396
 /* BROTLI_MAX_BLOCK_TYPE_SYMBOLS == 258 */
@@ -82,7 +76,7 @@ typedef BROTLI_ALIGNED(4) uint32_t HuffmanCode;
 
 static BROTLI_INLINE HuffmanCode ConstructHuffmanCode(const uint8_t bits,
     const uint16_t value) {
-  return ((value & 0xFFFF) << 16) | (bits & 0xFF);
+  return (HuffmanCode) ((value & 0xFFFF) << 16) | (bits & 0xFF);
 }
 
 #define BROTLI_HC_MARK_TABLE_FOR_FAST_LOAD(H) uint32_t __fastload_##H = (*H)
@@ -100,7 +94,7 @@ BROTLI_INTERNAL void BrotliBuildCodeLengthsHuffmanTable(HuffmanCode* root_table,
 /* Builds Huffman lookup table assuming code lengths are in symbol order.
    Returns size of resulting table. */
 BROTLI_INTERNAL uint32_t BrotliBuildHuffmanTable(HuffmanCode* root_table,
-    int root_bits, const uint16_t* const symbol_lists, uint16_t* count_arg);
+    int root_bits, const uint16_t* const symbol_lists, uint16_t* count);
 
 /* Builds a simple Huffman table. The |num_symbols| parameter is to be
    interpreted as follows: 0 means 1 symbol, 1 means 2 symbols,
@@ -110,13 +104,13 @@ BROTLI_INTERNAL uint32_t BrotliBuildSimpleHuffmanTable(HuffmanCode* table,
     int root_bits, uint16_t* symbols, uint32_t num_symbols);
 
 /* Contains a collection of Huffman trees with the same alphabet size. */
-/* max_symbol is needed due to simple codes since log2(alphabet_size) could be
-   greater than log2(max_symbol). */
+/* alphabet_size_limit is needed due to simple codes, since
+   log2(alphabet_size_max) could be greater than log2(alphabet_size_limit). */
 typedef struct {
   HuffmanCode** htrees;
   HuffmanCode* codes;
-  uint16_t alphabet_size;
-  uint16_t max_symbol;
+  uint16_t alphabet_size_max;
+  uint16_t alphabet_size_limit;
   uint16_t num_htrees;
 } HuffmanTreeGroup;
 
diff --git a/modules/brotli/dec/prefix.h b/modules/brotli/dec/prefix.h
index 3ea062d84..481a2c791 100644
--- a/modules/brotli/dec/prefix.h
+++ b/modules/brotli/dec/prefix.h
@@ -13,24 +13,6 @@
 #include "../common/constants.h"
 #include <brotli/types.h>
 
-/* Represents the range of values belonging to a prefix code:
-   [offset, offset + 2^nbits) */
-struct PrefixCodeRange {
-  uint16_t offset;
-  uint8_t nbits;
-};
-
-static const struct PrefixCodeRange
-    kBlockLengthPrefixCode[BROTLI_NUM_BLOCK_LEN_SYMBOLS] = {
-  {   1,  2}, {    5,  2}, {  9,   2}, {  13,  2},
-  {  17,  3}, {   25,  3}, {  33,  3}, {  41,  3},
-  {  49,  4}, {   65,  4}, {  81,  4}, {  97,  4},
-  { 113,  5}, {  145,  5}, { 177,  5}, { 209,  5},
-  { 241,  6}, {  305,  6}, { 369,  7}, { 497,  8},
-  { 753,  9}, { 1265, 10}, {2289, 11}, {4337, 12},
-  {8433, 13}, {16625, 24}
-};
-
 typedef struct CmdLutElement {
   uint8_t insert_len_extra_bits;
   uint8_t copy_len_extra_bits;
diff --git a/modules/brotli/dec/state.c b/modules/brotli/dec/state.c
index e0b37c2dc..f847836dd 100644
--- a/modules/brotli/dec/state.c
+++ b/modules/brotli/dec/state.c
@@ -33,10 +33,7 @@ BROTLI_BOOL BrotliDecoderStateInit(BrotliDecoderState* s,
   s->state = BROTLI_STATE_UNINITED;
   s->large_window = 0;
   s->substate_metablock_header = BROTLI_STATE_METABLOCK_HEADER_NONE;
-  s->substate_tree_group = BROTLI_STATE_TREE_GROUP_NONE;
-  s->substate_context_map = BROTLI_STATE_CONTEXT_MAP_NONE;
   s->substate_uncompressed = BROTLI_STATE_UNCOMPRESSED_NONE;
-  s->substate_huffman = BROTLI_STATE_HUFFMAN_NONE;
   s->substate_decode_uint8 = BROTLI_STATE_DECODE_UINT8_NONE;
   s->substate_read_block_length = BROTLI_STATE_READ_BLOCK_LENGTH_NONE;
 
@@ -59,8 +56,6 @@ BROTLI_BOOL BrotliDecoderStateInit(BrotliDecoderState* s,
   s->context_map_slice = NULL;
   s->dist_context_map_slice = NULL;
 
-  s->sub_loop_counter = 0;
-
   s->literal_hgroup.codes = NULL;
   s->literal_hgroup.htrees = NULL;
   s->insert_copy_hgroup.codes = NULL;
@@ -84,9 +79,6 @@ BROTLI_BOOL BrotliDecoderStateInit(BrotliDecoderState* s,
   s->block_type_trees = NULL;
   s->block_len_trees = NULL;
 
-  /* Make small negative indexes addressable. */
-  s->symbol_lists = &s->symbols_lists_array[BROTLI_HUFFMAN_MAX_CODE_LENGTH + 1];
-
   s->mtf_upper_bound = 63;
 
   s->dictionary = BrotliGetDictionary();
@@ -142,17 +134,20 @@ void BrotliDecoderStateCleanup(BrotliDecoderState* s) {
 }
 
 BROTLI_BOOL BrotliDecoderHuffmanTreeGroupInit(BrotliDecoderState* s,
-    HuffmanTreeGroup* group, uint32_t alphabet_size, uint32_t max_symbol,
-    uint32_t ntrees) {
-  /* Pack two allocations into one */
-  const size_t max_table_size = kMaxHuffmanTableSize[(alphabet_size + 31) >> 5];
+    HuffmanTreeGroup* group, uint32_t alphabet_size_max,
+    uint32_t alphabet_size_limit, uint32_t ntrees) {
+  /* 376 = 256 (1-st level table) + 4 + 7 + 15 + 31 + 63 (2-nd level mix-tables)
+     This number is discovered "unlimited" "enough" calculator; it is actually
+     a wee bigger than required in several cases (especially for alphabets with
+     less than 16 symbols). */
+  const size_t max_table_size = alphabet_size_limit + 376;
   const size_t code_size = sizeof(HuffmanCode) * ntrees * max_table_size;
   const size_t htree_size = sizeof(HuffmanCode*) * ntrees;
   /* Pointer alignment is, hopefully, wider than sizeof(HuffmanCode). */
   HuffmanCode** p = (HuffmanCode**)BROTLI_DECODER_ALLOC(s,
       code_size + htree_size);
-  group->alphabet_size = (uint16_t)alphabet_size;
-  group->max_symbol = (uint16_t)max_symbol;
+  group->alphabet_size_max = (uint16_t)alphabet_size_max;
+  group->alphabet_size_limit = (uint16_t)alphabet_size_limit;
   group->num_htrees = (uint16_t)ntrees;
   group->htrees = p;
   group->codes = (HuffmanCode*)(&p[ntrees]);
diff --git a/modules/brotli/dec/state.h b/modules/brotli/dec/state.h
index d28b63920..54dab698b 100644
--- a/modules/brotli/dec/state.h
+++ b/modules/brotli/dec/state.h
@@ -21,6 +21,95 @@
 extern "C" {
 #endif
 
+/* Graphviz diagram that describes state transitions:
+
+digraph States {
+  graph [compound=true]
+  concentrate=true
+  node [shape="box"]
+
+  UNINITED -> {LARGE_WINDOW_BITS -> INITIALIZE}
+  subgraph cluster_metablock_workflow {
+    style="rounded"
+    label=< <B>METABLOCK CYCLE</B> >
+    METABLOCK_BEGIN -> METABLOCK_HEADER
+    METABLOCK_HEADER:sw -> METADATA
+    METABLOCK_HEADER:s -> UNCOMPRESSED
+    METABLOCK_HEADER:se -> METABLOCK_DONE:ne
+    METADATA:s -> METABLOCK_DONE:w
+    UNCOMPRESSED:s -> METABLOCK_DONE:n
+    METABLOCK_DONE:e -> METABLOCK_BEGIN:e [constraint="false"]
+  }
+  INITIALIZE -> METABLOCK_BEGIN
+  METABLOCK_DONE -> DONE
+
+  subgraph cluster_compressed_metablock {
+    style="rounded"
+    label=< <B>COMPRESSED METABLOCK</B> >
+
+    subgraph cluster_command {
+      style="rounded"
+      label=< <B>HOT LOOP</B> >
+
+      _METABLOCK_DONE_PORT_ [shape=point style=invis]
+
+      {
+        // Set different shape for nodes returning from "compressed metablock".
+        node [shape=invhouse]; CMD_INNER CMD_POST_DECODE_LITERALS;
+        CMD_POST_WRAP_COPY; CMD_INNER_WRITE; CMD_POST_WRITE_1;
+      }
+
+      CMD_BEGIN -> CMD_INNER -> CMD_POST_DECODE_LITERALS -> CMD_POST_WRAP_COPY
+
+      // IO ("write") nodes are not in the hot loop!
+      CMD_INNER_WRITE [style=dashed]
+      CMD_INNER -> CMD_INNER_WRITE
+      CMD_POST_WRITE_1 [style=dashed]
+      CMD_POST_DECODE_LITERALS -> CMD_POST_WRITE_1
+      CMD_POST_WRITE_2 [style=dashed]
+      CMD_POST_WRAP_COPY -> CMD_POST_WRITE_2
+
+      CMD_POST_WRITE_1 -> CMD_BEGIN:s [constraint="false"]
+      CMD_INNER_WRITE -> {CMD_INNER CMD_POST_DECODE_LITERALS}
+          [constraint="false"]
+      CMD_BEGIN:ne -> CMD_POST_DECODE_LITERALS [constraint="false"]
+      CMD_POST_WRAP_COPY -> CMD_BEGIN [constraint="false"]
+      CMD_POST_DECODE_LITERALS -> CMD_BEGIN:ne [constraint="false"]
+      CMD_POST_WRITE_2 -> CMD_POST_WRAP_COPY [constraint="false"]
+      {rank=same; CMD_BEGIN; CMD_INNER; CMD_POST_DECODE_LITERALS;
+          CMD_POST_WRAP_COPY}
+      {rank=same; CMD_INNER_WRITE; CMD_POST_WRITE_1; CMD_POST_WRITE_2}
+
+      {CMD_INNER CMD_POST_DECODE_LITERALS CMD_POST_WRAP_COPY} ->
+          _METABLOCK_DONE_PORT_ [style=invis]
+      {CMD_INNER_WRITE CMD_POST_WRITE_1} -> _METABLOCK_DONE_PORT_
+          [constraint="false" style=invis]
+    }
+
+    BEFORE_COMPRESSED_METABLOCK_HEADER:s -> HUFFMAN_CODE_0:n
+    HUFFMAN_CODE_0 -> HUFFMAN_CODE_1 -> HUFFMAN_CODE_2 -> HUFFMAN_CODE_3
+    HUFFMAN_CODE_0 -> METABLOCK_HEADER_2 -> CONTEXT_MODES -> CONTEXT_MAP_1
+    CONTEXT_MAP_1 -> CONTEXT_MAP_2 -> TREE_GROUP
+    TREE_GROUP -> BEFORE_COMPRESSED_METABLOCK_BODY:e
+    BEFORE_COMPRESSED_METABLOCK_BODY:s -> CMD_BEGIN:n
+
+    HUFFMAN_CODE_3:e -> HUFFMAN_CODE_0:ne [constraint="false"]
+    {rank=same; HUFFMAN_CODE_0; HUFFMAN_CODE_1; HUFFMAN_CODE_2; HUFFMAN_CODE_3}
+    {rank=same; METABLOCK_HEADER_2; CONTEXT_MODES; CONTEXT_MAP_1; CONTEXT_MAP_2;
+        TREE_GROUP}
+  }
+  METABLOCK_HEADER:e -> BEFORE_COMPRESSED_METABLOCK_HEADER:n
+
+  _METABLOCK_DONE_PORT_ -> METABLOCK_DONE:se
+      [constraint="false" ltail=cluster_command]
+
+  UNINITED [shape=Mdiamond];
+  DONE [shape=Msquare];
+}
+
+
+ */
+
 typedef enum {
   BROTLI_STATE_UNINITED,
   BROTLI_STATE_LARGE_WINDOW_BITS,
@@ -39,6 +128,7 @@ typedef enum {
   BROTLI_STATE_METABLOCK_DONE,
   BROTLI_STATE_COMMAND_POST_WRITE_1,
   BROTLI_STATE_COMMAND_POST_WRITE_2,
+  BROTLI_STATE_BEFORE_COMPRESSED_METABLOCK_HEADER,
   BROTLI_STATE_HUFFMAN_CODE_0,
   BROTLI_STATE_HUFFMAN_CODE_1,
   BROTLI_STATE_HUFFMAN_CODE_2,
@@ -46,6 +136,7 @@ typedef enum {
   BROTLI_STATE_CONTEXT_MAP_1,
   BROTLI_STATE_CONTEXT_MAP_2,
   BROTLI_STATE_TREE_GROUP,
+  BROTLI_STATE_BEFORE_COMPRESSED_METABLOCK_BODY,
   BROTLI_STATE_DONE
 } BrotliRunningState;
 
@@ -98,6 +189,50 @@ typedef enum {
   BROTLI_STATE_READ_BLOCK_LENGTH_SUFFIX
 } BrotliRunningReadBlockLengthState;
 
+typedef struct BrotliMetablockHeaderArena {
+  BrotliRunningTreeGroupState substate_tree_group;
+  BrotliRunningContextMapState substate_context_map;
+  BrotliRunningHuffmanState substate_huffman;
+
+  uint32_t sub_loop_counter;
+
+  uint32_t repeat_code_len;
+  uint32_t prev_code_len;
+
+  /* For ReadHuffmanCode. */
+  uint32_t symbol;
+  uint32_t repeat;
+  uint32_t space;
+
+  /* Huffman table for "histograms". */
+  HuffmanCode table[32];
+  /* List of heads of symbol chains. */
+  uint16_t* symbol_lists;
+  /* Storage from symbol_lists. */
+  uint16_t symbols_lists_array[BROTLI_HUFFMAN_MAX_CODE_LENGTH + 1 +
+                               BROTLI_NUM_COMMAND_SYMBOLS];
+  /* Tails of symbol chains. */
+  int next_symbol[32];
+  uint8_t code_length_code_lengths[BROTLI_CODE_LENGTH_CODES];
+  /* Population counts for the code lengths. */
+  uint16_t code_length_histo[16];
+
+  /* For HuffmanTreeGroupDecode. */
+  int htree_index;
+  HuffmanCode* next;
+
+  /* For DecodeContextMap. */
+  uint32_t context_index;
+  uint32_t max_run_length_prefix;
+  uint32_t code;
+  HuffmanCode context_map_table[BROTLI_HUFFMAN_MAX_SIZE_272];
+} BrotliMetablockHeaderArena;
+
+typedef struct BrotliMetablockBodyArena {
+  uint8_t dist_extra_bits[544];
+  uint32_t dist_offset[544];
+} BrotliMetablockBodyArena;
+
 struct BrotliDecoderStateStruct {
   BrotliRunningState state;
 
@@ -110,7 +245,8 @@ struct BrotliDecoderStateStruct {
   brotli_free_func free_func;
   void* memory_manager_opaque;
 
-  /* Temporary storage for remaining input. */
+  /* Temporary storage for remaining input. Brotli stream format is designed in
+     a way, that 64 bits are enough to make progress in decoding. */
   union {
     uint64_t u64;
     uint8_t u8[8];
@@ -125,7 +261,6 @@ struct BrotliDecoderStateStruct {
   int dist_rb_idx;
   int dist_rb[4];
   int error_code;
-  uint32_t sub_loop_counter;
   uint8_t* ringbuffer;
   uint8_t* ringbuffer_end;
   HuffmanCode* htree_command;
@@ -153,13 +288,10 @@ struct BrotliDecoderStateStruct {
   uint32_t block_type_rb[6];
   uint32_t distance_postfix_bits;
   uint32_t num_direct_distance_codes;
-  int distance_postfix_mask;
   uint32_t num_dist_htrees;
   uint8_t* dist_context_map;
   HuffmanCode* literal_htree;
   uint8_t dist_htree_index;
-  uint32_t repeat_code_len;
-  uint32_t prev_code_len;
 
   int copy_length;
   int distance_code;
@@ -168,33 +300,6 @@ struct BrotliDecoderStateStruct {
   size_t rb_roundtrips;  /* how many times we went around the ring-buffer */
   size_t partial_pos_out;  /* how much output to the user in total */
 
-  /* For ReadHuffmanCode. */
-  uint32_t symbol;
-  uint32_t repeat;
-  uint32_t space;
-
-  HuffmanCode table[32];
-  /* List of heads of symbol chains. */
-  uint16_t* symbol_lists;
-  /* Storage from symbol_lists. */
-  uint16_t symbols_lists_array[BROTLI_HUFFMAN_MAX_CODE_LENGTH + 1 +
-                               BROTLI_NUM_COMMAND_SYMBOLS];
-  /* Tails of symbol chains. */
-  int next_symbol[32];
-  uint8_t code_length_code_lengths[BROTLI_CODE_LENGTH_CODES];
-  /* Population counts for the code lengths. */
-  uint16_t code_length_histo[16];
-
-  /* For HuffmanTreeGroupDecode. */
-  int htree_index;
-  HuffmanCode* next;
-
-  /* For DecodeContextMap. */
-  uint32_t context_index;
-  uint32_t max_run_length_prefix;
-  uint32_t code;
-  HuffmanCode context_map_table[BROTLI_HUFFMAN_MAX_SIZE_272];
-
   /* For InverseMoveToFrontTransform. */
   uint32_t mtf_upper_bound;
   uint32_t mtf[64 + 1];
@@ -203,10 +308,7 @@ struct BrotliDecoderStateStruct {
 
   /* States inside function calls. */
   BrotliRunningMetablockHeaderState substate_metablock_header;
-  BrotliRunningTreeGroupState substate_tree_group;
-  BrotliRunningContextMapState substate_context_map;
   BrotliRunningUncompressedState substate_uncompressed;
-  BrotliRunningHuffmanState substate_huffman;
   BrotliRunningDecodeUint8State substate_decode_uint8;
   BrotliRunningReadBlockLengthState substate_read_block_length;
 
@@ -229,6 +331,11 @@ struct BrotliDecoderStateStruct {
   const BrotliTransforms* transforms;
 
   uint32_t trivial_literal_contexts[8];  /* 256 bits */
+
+  union {
+    BrotliMetablockHeaderArena header;
+    BrotliMetablockBodyArena body;
+  } arena;
 };
 
 typedef struct BrotliDecoderStateStruct BrotliDecoderStateInternal;
@@ -241,8 +348,8 @@ BROTLI_INTERNAL void BrotliDecoderStateMetablockBegin(BrotliDecoderState* s);
 BROTLI_INTERNAL void BrotliDecoderStateCleanupAfterMetablock(
     BrotliDecoderState* s);
 BROTLI_INTERNAL BROTLI_BOOL BrotliDecoderHuffmanTreeGroupInit(
-    BrotliDecoderState* s, HuffmanTreeGroup* group, uint32_t alphabet_size,
-    uint32_t max_symbol, uint32_t ntrees);
+    BrotliDecoderState* s, HuffmanTreeGroup* group, uint32_t alphabet_size_max,
+    uint32_t alphabet_size_limit, uint32_t ntrees);
 
 #define BROTLI_DECODER_ALLOC(S, L) S->alloc_func(S->memory_manager_opaque, L)
 
diff --git a/modules/brotli/enc/backward_references.c b/modules/brotli/enc/backward_references.c
index cd023d9b4..a07a617a0 100644
--- a/modules/brotli/enc/backward_references.c
+++ b/modules/brotli/enc/backward_references.c
@@ -9,6 +9,7 @@
 #include "./backward_references.h"
 
 #include "../common/constants.h"
+#include "../common/context.h"
 #include "../common/dictionary.h"
 #include "../common/platform.h"
 #include <brotli/types.h>
@@ -119,17 +120,17 @@ static BROTLI_INLINE size_t ComputeDistanceCode(size_t distance,
 #undef CAT
 #undef EXPAND_CAT
 
-void BrotliCreateBackwardReferences(
-    size_t num_bytes, size_t position, const uint8_t* ringbuffer,
-    size_t ringbuffer_mask, const BrotliEncoderParams* params,
-    HasherHandle hasher, int* dist_cache, size_t* last_insert_len,
+void BrotliCreateBackwardReferences(size_t num_bytes,
+    size_t position, const uint8_t* ringbuffer, size_t ringbuffer_mask,
+    ContextLut literal_context_lut, const BrotliEncoderParams* params,
+    Hasher* hasher, int* dist_cache, size_t* last_insert_len,
     Command* commands, size_t* num_commands, size_t* num_literals) {
   switch (params->hasher.type) {
 #define CASE_(N)                                                  \
     case N:                                                       \
-      CreateBackwardReferencesNH ## N(                            \
-          num_bytes, position, ringbuffer,                        \
-          ringbuffer_mask, params, hasher, dist_cache,            \
+      CreateBackwardReferencesNH ## N(num_bytes,                  \
+          position, ringbuffer, ringbuffer_mask,                  \
+          literal_context_lut, params, hasher, dist_cache,        \
           last_insert_len, commands, num_commands, num_literals); \
       return;
     FOR_GENERIC_HASHERS(CASE_)
diff --git a/modules/brotli/enc/backward_references.h b/modules/brotli/enc/backward_references.h
index 3a4146647..9589cc154 100644
--- a/modules/brotli/enc/backward_references.h
+++ b/modules/brotli/enc/backward_references.h
@@ -10,6 +10,7 @@
 #define BROTLI_ENC_BACKWARD_REFERENCES_H_
 
 #include "../common/constants.h"
+#include "../common/context.h"
 #include "../common/dictionary.h"
 #include "../common/platform.h"
 #include <brotli/types.h>
@@ -25,10 +26,10 @@ extern "C" {
    initially the total amount of commands output by previous
    CreateBackwardReferences calls, and must be incremented by the amount written
    by this call. */
-BROTLI_INTERNAL void BrotliCreateBackwardReferences(
-    size_t num_bytes, size_t position, const uint8_t* ringbuffer,
-    size_t ringbuffer_mask, const BrotliEncoderParams* params,
-    HasherHandle hasher, int* dist_cache, size_t* last_insert_len,
+BROTLI_INTERNAL void BrotliCreateBackwardReferences(size_t num_bytes,
+    size_t position, const uint8_t* ringbuffer, size_t ringbuffer_mask,
+    ContextLut literal_context_lut, const BrotliEncoderParams* params,
+    Hasher* hasher, int* dist_cache, size_t* last_insert_len,
     Command* commands, size_t* num_commands, size_t* num_literals);
 
 #if defined(__cplusplus) || defined(c_plusplus)
diff --git a/modules/brotli/enc/backward_references_hq.c b/modules/brotli/enc/backward_references_hq.c
index 96b0e708d..5651caeb7 100644
--- a/modules/brotli/enc/backward_references_hq.c
+++ b/modules/brotli/enc/backward_references_hq.c
@@ -11,6 +11,7 @@
 #include <string.h>  /* memcpy, memset */
 
 #include "../common/constants.h"
+#include "../common/context.h"
 #include "../common/platform.h"
 #include <brotli/types.h>
 #include "./command.h"
@@ -26,6 +27,7 @@
 extern "C" {
 #endif
 
+/* BrotliCalculateDistanceCodeLimit(BROTLI_MAX_ALLOWED_DISTANCE, 3, 120). */
 #define BROTLI_MAX_EFFECTIVE_DISTANCE_ALPHABET_SIZE 544
 
 static const float kInfinity = 1.7e38f;  /* ~= 2 ^ 127 */
@@ -86,14 +88,10 @@ typedef struct ZopfliCostModel {
 static void InitZopfliCostModel(
     MemoryManager* m, ZopfliCostModel* self, const BrotliDistanceParams* dist,
     size_t num_bytes) {
-  uint32_t distance_histogram_size = dist->alphabet_size;
-  if (distance_histogram_size > BROTLI_MAX_EFFECTIVE_DISTANCE_ALPHABET_SIZE) {
-    distance_histogram_size = BROTLI_MAX_EFFECTIVE_DISTANCE_ALPHABET_SIZE;
-  }
   self->num_bytes_ = num_bytes;
   self->literal_costs_ = BROTLI_ALLOC(m, float, num_bytes + 2);
-  self->cost_dist_ = BROTLI_ALLOC(m, float, dist->alphabet_size);
-  self->distance_histogram_size = distance_histogram_size;
+  self->cost_dist_ = BROTLI_ALLOC(m, float, dist->alphabet_size_limit);
+  self->distance_histogram_size = dist->alphabet_size_limit;
   if (BROTLI_IS_OOM(m)) return;
 }
 
@@ -408,9 +406,12 @@ static size_t UpdateNodes(
     const int* starting_dist_cache, const size_t num_matches,
     const BackwardMatch* matches, const ZopfliCostModel* model,
     StartPosQueue* queue, ZopfliNode* nodes) {
+  const size_t stream_offset = params->stream_offset;
   const size_t cur_ix = block_start + pos;
   const size_t cur_ix_masked = cur_ix & ringbuffer_mask;
   const size_t max_distance = BROTLI_MIN(size_t, cur_ix, max_backward_limit);
+  const size_t dictionary_start = BROTLI_MIN(size_t,
+      cur_ix + stream_offset, max_backward_limit);
   const size_t max_len = num_bytes - pos;
   const size_t max_zopfli_len = MaxZopfliLen(params);
   const size_t max_iters = MaxZopfliCandidates(params);
@@ -419,8 +420,8 @@ static size_t UpdateNodes(
   size_t k;
   size_t gap = 0;
 
-  EvaluateNode(block_start, pos, max_backward_limit, gap, starting_dist_cache,
-      model, queue, nodes);
+  EvaluateNode(block_start + stream_offset, pos, max_backward_limit, gap,
+      starting_dist_cache, model, queue, nodes);
 
   {
     const PosData* posdata = StartPosQueueAt(queue, 0);
@@ -453,7 +454,7 @@ static size_t UpdateNodes(
       if (cur_ix_masked + best_len > ringbuffer_mask) {
         break;
       }
-      if (BROTLI_PREDICT_FALSE(backward > max_distance + gap)) {
+      if (BROTLI_PREDICT_FALSE(backward > dictionary_start + gap)) {
         /* Word dictionary -> ignore. */
         continue;
       }
@@ -472,6 +473,8 @@ static size_t UpdateNodes(
                                        &ringbuffer[cur_ix_masked],
                                        max_len);
       } else {
+        /* "Gray" area. It is addressable by decoder, but this encoder
+           instance does not have that data -> should not touch it. */
         continue;
       }
       {
@@ -506,7 +509,7 @@ static size_t UpdateNodes(
         BackwardMatch match = matches[j];
         size_t dist = match.distance;
         BROTLI_BOOL is_dictionary_match =
-            TO_BROTLI_BOOL(dist > max_distance + gap);
+            TO_BROTLI_BOOL(dist > dictionary_start + gap);
         /* We already tried all possible last distance matches, so we can use
            normal distance code here. */
         size_t dist_code = dist + BROTLI_NUM_DISTANCE_SHORT_CODES - 1;
@@ -569,6 +572,7 @@ void BrotliZopfliCreateCommands(const size_t num_bytes,
     const size_t block_start, const ZopfliNode* nodes, int* dist_cache,
     size_t* last_insert_len, const BrotliEncoderParams* params,
     Command* commands, size_t* num_literals) {
+  const size_t stream_offset = params->stream_offset;
   const size_t max_backward_limit = BROTLI_MAX_BACKWARD_LIMIT(params->lgwin);
   size_t pos = 0;
   uint32_t offset = nodes[0].u.next;
@@ -587,9 +591,10 @@ void BrotliZopfliCreateCommands(const size_t num_bytes,
     {
       size_t distance = ZopfliNodeCopyDistance(next);
       size_t len_code = ZopfliNodeLengthCode(next);
-      size_t max_distance =
-          BROTLI_MIN(size_t, block_start + pos, max_backward_limit);
-      BROTLI_BOOL is_dictionary = TO_BROTLI_BOOL(distance > max_distance + gap);
+      size_t dictionary_start = BROTLI_MIN(size_t,
+          block_start + pos + stream_offset, max_backward_limit);
+      BROTLI_BOOL is_dictionary =
+          TO_BROTLI_BOOL(distance > dictionary_start + gap);
       size_t dist_code = ZopfliNodeDistanceCode(next);
       InitCommand(&commands[i], &params->dist, insert_length,
           copy_length, (int)len_code - (int)copy_length, dist_code);
@@ -613,6 +618,7 @@ static size_t ZopfliIterate(size_t num_bytes, size_t position,
     const BrotliEncoderParams* params, const size_t gap, const int* dist_cache,
     const ZopfliCostModel* model, const uint32_t* num_matches,
     const BackwardMatch* matches, ZopfliNode* nodes) {
+  const size_t stream_offset = params->stream_offset;
   const size_t max_backward_limit = BROTLI_MAX_BACKWARD_LIMIT(params->lgwin);
   const size_t max_zopfli_len = MaxZopfliLen(params);
   StartPosQueue queue;
@@ -637,7 +643,7 @@ static size_t ZopfliIterate(size_t num_bytes, size_t position,
       while (skip) {
         i++;
         if (i + 3 >= num_bytes) break;
-        EvaluateNode(position, i, max_backward_limit, gap,
+        EvaluateNode(position + stream_offset, i, max_backward_limit, gap,
             dist_cache, model, &queue, nodes);
         cur_match_pos += num_matches[i];
         skip--;
@@ -650,8 +656,9 @@ static size_t ZopfliIterate(size_t num_bytes, size_t position,
 /* REQUIRES: nodes != NULL and len(nodes) >= num_bytes + 1 */
 size_t BrotliZopfliComputeShortestPath(MemoryManager* m, size_t num_bytes,
     size_t position, const uint8_t* ringbuffer, size_t ringbuffer_mask,
-    const BrotliEncoderParams* params,
-    const int* dist_cache, HasherHandle hasher, ZopfliNode* nodes) {
+    ContextLut literal_context_lut, const BrotliEncoderParams* params,
+    const int* dist_cache, Hasher* hasher, ZopfliNode* nodes) {
+  const size_t stream_offset = params->stream_offset;
   const size_t max_backward_limit = BROTLI_MAX_BACKWARD_LIMIT(params->lgwin);
   const size_t max_zopfli_len = MaxZopfliLen(params);
   ZopfliCostModel model;
@@ -662,6 +669,7 @@ size_t BrotliZopfliComputeShortestPath(MemoryManager* m, size_t num_bytes,
   size_t i;
   size_t gap = 0;
   size_t lz_matches_offset = 0;
+  BROTLI_UNUSED(literal_context_lut);
   nodes[0].length = 0;
   nodes[0].u.cost = 0;
   InitZopfliCostModel(m, &model, &params->dist, num_bytes);
@@ -672,12 +680,14 @@ size_t BrotliZopfliComputeShortestPath(MemoryManager* m, size_t num_bytes,
   for (i = 0; i + HashTypeLengthH10() - 1 < num_bytes; i++) {
     const size_t pos = position + i;
     const size_t max_distance = BROTLI_MIN(size_t, pos, max_backward_limit);
+    const size_t dictionary_start = BROTLI_MIN(size_t,
+        pos + stream_offset, max_backward_limit);
     size_t skip;
     size_t num_matches;
-    num_matches = FindAllMatchesH10(hasher,
+    num_matches = FindAllMatchesH10(&hasher->privat._H10,
         &params->dictionary,
         ringbuffer, ringbuffer_mask, pos, num_bytes - i, max_distance,
-        gap, params, &matches[lz_matches_offset]);
+        dictionary_start + gap, params, &matches[lz_matches_offset]);
     if (num_matches > 0 &&
         BackwardMatchLength(&matches[num_matches - 1]) > max_zopfli_len) {
       matches[0] = matches[num_matches - 1];
@@ -692,13 +702,14 @@ size_t BrotliZopfliComputeShortestPath(MemoryManager* m, size_t num_bytes,
     }
     if (skip > 1) {
       /* Add the tail of the copy to the hasher. */
-      StoreRangeH10(hasher, ringbuffer, ringbuffer_mask, pos + 1, BROTLI_MIN(
+      StoreRangeH10(&hasher->privat._H10,
+          ringbuffer, ringbuffer_mask, pos + 1, BROTLI_MIN(
           size_t, pos + skip, store_end));
       skip--;
       while (skip) {
         i++;
         if (i + HashTypeLengthH10() - 1 >= num_bytes) break;
-        EvaluateNode(position, i, max_backward_limit, gap,
+        EvaluateNode(position + stream_offset, i, max_backward_limit, gap,
             dist_cache, &model, &queue, nodes);
         skip--;
       }
@@ -710,15 +721,14 @@ size_t BrotliZopfliComputeShortestPath(MemoryManager* m, size_t num_bytes,
 
 void BrotliCreateZopfliBackwardReferences(MemoryManager* m, size_t num_bytes,
     size_t position, const uint8_t* ringbuffer, size_t ringbuffer_mask,
-    const BrotliEncoderParams* params,
-    HasherHandle hasher, int* dist_cache, size_t* last_insert_len,
+    ContextLut literal_context_lut, const BrotliEncoderParams* params,
+    Hasher* hasher, int* dist_cache, size_t* last_insert_len,
     Command* commands, size_t* num_commands, size_t* num_literals) {
-  ZopfliNode* nodes;
-  nodes = BROTLI_ALLOC(m, ZopfliNode, num_bytes + 1);
-  if (BROTLI_IS_OOM(m)) return;
+  ZopfliNode* nodes = BROTLI_ALLOC(m, ZopfliNode, num_bytes + 1);
+  if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(nodes)) return;
   BrotliInitZopfliNodes(nodes, num_bytes + 1);
   *num_commands += BrotliZopfliComputeShortestPath(m, num_bytes,
-      position, ringbuffer, ringbuffer_mask, params,
+      position, ringbuffer, ringbuffer_mask, literal_context_lut, params,
       dist_cache, hasher, nodes);
   if (BROTLI_IS_OOM(m)) return;
   BrotliZopfliCreateCommands(num_bytes, position, nodes, dist_cache,
@@ -728,9 +738,10 @@ void BrotliCreateZopfliBackwardReferences(MemoryManager* m, size_t num_bytes,
 
 void BrotliCreateHqZopfliBackwardReferences(MemoryManager* m, size_t num_bytes,
     size_t position, const uint8_t* ringbuffer, size_t ringbuffer_mask,
-    const BrotliEncoderParams* params,
-    HasherHandle hasher, int* dist_cache, size_t* last_insert_len,
+    ContextLut literal_context_lut, const BrotliEncoderParams* params,
+    Hasher* hasher, int* dist_cache, size_t* last_insert_len,
     Command* commands, size_t* num_commands, size_t* num_literals) {
+  const size_t stream_offset = params->stream_offset;
   const size_t max_backward_limit = BROTLI_MAX_BACKWARD_LIMIT(params->lgwin);
   uint32_t* num_matches = BROTLI_ALLOC(m, uint32_t, num_bytes);
   size_t matches_size = 4 * num_bytes;
@@ -747,10 +758,16 @@ void BrotliCreateHqZopfliBackwardReferences(MemoryManager* m, size_t num_bytes,
   BackwardMatch* matches = BROTLI_ALLOC(m, BackwardMatch, matches_size);
   size_t gap = 0;
   size_t shadow_matches = 0;
-  if (BROTLI_IS_OOM(m)) return;
+  BROTLI_UNUSED(literal_context_lut);
+  if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(num_matches) ||
+      BROTLI_IS_NULL(matches)) {
+    return;
+  }
   for (i = 0; i + HashTypeLengthH10() - 1 < num_bytes; ++i) {
     const size_t pos = position + i;
     size_t max_distance = BROTLI_MIN(size_t, pos, max_backward_limit);
+    size_t dictionary_start = BROTLI_MIN(size_t,
+        pos + stream_offset, max_backward_limit);
     size_t max_length = num_bytes - i;
     size_t num_found_matches;
     size_t cur_match_end;
@@ -759,10 +776,10 @@ void BrotliCreateHqZopfliBackwardReferences(MemoryManager* m, size_t num_bytes,
     BROTLI_ENSURE_CAPACITY(m, BackwardMatch, matches, matches_size,
         cur_match_pos + MAX_NUM_MATCHES_H10 + shadow_matches);
     if (BROTLI_IS_OOM(m)) return;
-    num_found_matches = FindAllMatchesH10(hasher,
+    num_found_matches = FindAllMatchesH10(&hasher->privat._H10,
         &params->dictionary,
         ringbuffer, ringbuffer_mask, pos, max_length,
-        max_distance, gap, params,
+        max_distance, dictionary_start + gap, params,
         &matches[cur_match_pos + shadow_matches]);
     cur_match_end = cur_match_pos + num_found_matches;
     for (j = cur_match_pos; j + 1 < cur_match_end; ++j) {
@@ -777,7 +794,8 @@ void BrotliCreateHqZopfliBackwardReferences(MemoryManager* m, size_t num_bytes,
         matches[cur_match_pos++] = matches[cur_match_end - 1];
         num_matches[i] = 1;
         /* Add the tail of the copy to the hasher. */
-        StoreRangeH10(hasher, ringbuffer, ringbuffer_mask, pos + 1,
+        StoreRangeH10(&hasher->privat._H10,
+                      ringbuffer, ringbuffer_mask, pos + 1,
                       BROTLI_MIN(size_t, pos + match_len, store_end));
         memset(&num_matches[i + 1], 0, skip * sizeof(num_matches[0]));
         i += skip;
@@ -791,7 +809,7 @@ void BrotliCreateHqZopfliBackwardReferences(MemoryManager* m, size_t num_bytes,
   memcpy(orig_dist_cache, dist_cache, 4 * sizeof(dist_cache[0]));
   orig_num_commands = *num_commands;
   nodes = BROTLI_ALLOC(m, ZopfliNode, num_bytes + 1);
-  if (BROTLI_IS_OOM(m)) return;
+  if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(nodes)) return;
   InitZopfliCostModel(m, &model, &params->dist, num_bytes);
   if (BROTLI_IS_OOM(m)) return;
   for (i = 0; i < 2; i++) {
diff --git a/modules/brotli/enc/backward_references_hq.h b/modules/brotli/enc/backward_references_hq.h
index 1e4275d40..36b75f250 100644
--- a/modules/brotli/enc/backward_references_hq.h
+++ b/modules/brotli/enc/backward_references_hq.h
@@ -10,6 +10,7 @@
 #define BROTLI_ENC_BACKWARD_REFERENCES_HQ_H_
 
 #include "../common/constants.h"
+#include "../common/context.h"
 #include "../common/dictionary.h"
 #include "../common/platform.h"
 #include <brotli/types.h>
@@ -23,15 +24,17 @@ extern "C" {
 #endif
 
 BROTLI_INTERNAL void BrotliCreateZopfliBackwardReferences(MemoryManager* m,
-    size_t num_bytes, size_t position, const uint8_t* ringbuffer,
-    size_t ringbuffer_mask, const BrotliEncoderParams* params,
-    HasherHandle hasher, int* dist_cache, size_t* last_insert_len,
+    size_t num_bytes,
+    size_t position, const uint8_t* ringbuffer, size_t ringbuffer_mask,
+    ContextLut literal_context_lut, const BrotliEncoderParams* params,
+    Hasher* hasher, int* dist_cache, size_t* last_insert_len,
     Command* commands, size_t* num_commands, size_t* num_literals);
 
 BROTLI_INTERNAL void BrotliCreateHqZopfliBackwardReferences(MemoryManager* m,
-    size_t num_bytes, size_t position, const uint8_t* ringbuffer,
-    size_t ringbuffer_mask, const BrotliEncoderParams* params,
-    HasherHandle hasher, int* dist_cache, size_t* last_insert_len,
+    size_t num_bytes,
+    size_t position, const uint8_t* ringbuffer, size_t ringbuffer_mask,
+    ContextLut literal_context_lut, const BrotliEncoderParams* params,
+    Hasher* hasher, int* dist_cache, size_t* last_insert_len,
     Command* commands, size_t* num_commands, size_t* num_literals);
 
 typedef struct ZopfliNode {
@@ -77,8 +80,8 @@ BROTLI_INTERNAL void BrotliInitZopfliNodes(ZopfliNode* array, size_t length);
 BROTLI_INTERNAL size_t BrotliZopfliComputeShortestPath(
     MemoryManager* m, size_t num_bytes,
     size_t position, const uint8_t* ringbuffer, size_t ringbuffer_mask,
-    const BrotliEncoderParams* params,
-    const int* dist_cache, HasherHandle hasher, ZopfliNode* nodes);
+    ContextLut literal_context_lut, const BrotliEncoderParams* params,
+    const int* dist_cache, Hasher* hasher, ZopfliNode* nodes);
 
 BROTLI_INTERNAL void BrotliZopfliCreateCommands(
     const size_t num_bytes, const size_t block_start, const ZopfliNode* nodes,
diff --git a/modules/brotli/enc/backward_references_inc.h b/modules/brotli/enc/backward_references_inc.h
index c18cdb00c..766bf91ff 100644
--- a/modules/brotli/enc/backward_references_inc.h
+++ b/modules/brotli/enc/backward_references_inc.h
@@ -10,11 +10,13 @@
 static BROTLI_NOINLINE void EXPORT_FN(CreateBackwardReferences)(
     size_t num_bytes, size_t position,
     const uint8_t* ringbuffer, size_t ringbuffer_mask,
-    const BrotliEncoderParams* params,
-    HasherHandle hasher, int* dist_cache, size_t* last_insert_len,
+    ContextLut literal_context_lut, const BrotliEncoderParams* params,
+    Hasher* hasher, int* dist_cache, size_t* last_insert_len,
     Command* commands, size_t* num_commands, size_t* num_literals) {
+  HASHER()* privat = &hasher->privat.FN(_);
   /* Set maximum distance, see section 9.1. of the spec. */
   const size_t max_backward_limit = BROTLI_MAX_BACKWARD_LIMIT(params->lgwin);
+  const size_t position_offset = params->stream_offset;
 
   const Command* const orig_commands = commands;
   size_t insert_length = *last_insert_len;
@@ -31,19 +33,23 @@ static BROTLI_NOINLINE void EXPORT_FN(CreateBackwardReferences)(
   /* Minimum score to accept a backward reference. */
   const score_t kMinScore = BROTLI_SCORE_BASE + 100;
 
-  FN(PrepareDistanceCache)(hasher, dist_cache);
+  BROTLI_UNUSED(literal_context_lut);
+
+  FN(PrepareDistanceCache)(privat, dist_cache);
 
   while (position + FN(HashTypeLength)() < pos_end) {
     size_t max_length = pos_end - position;
     size_t max_distance = BROTLI_MIN(size_t, position, max_backward_limit);
+    size_t dictionary_start = BROTLI_MIN(size_t,
+        position + position_offset, max_backward_limit);
     HasherSearchResult sr;
     sr.len = 0;
     sr.len_code_delta = 0;
     sr.distance = 0;
     sr.score = kMinScore;
-    FN(FindLongestMatch)(hasher, &params->dictionary,
+    FN(FindLongestMatch)(privat, &params->dictionary,
         ringbuffer, ringbuffer_mask, dist_cache, position, max_length,
-        max_distance, gap, params->dist.max_distance, &sr);
+        max_distance, dictionary_start + gap, params->dist.max_distance, &sr);
     if (sr.score > kMinScore) {
       /* Found a match. Let's look for something even better ahead. */
       int delayed_backward_references_in_row = 0;
@@ -57,10 +63,13 @@ static BROTLI_NOINLINE void EXPORT_FN(CreateBackwardReferences)(
         sr2.distance = 0;
         sr2.score = kMinScore;
         max_distance = BROTLI_MIN(size_t, position + 1, max_backward_limit);
-        FN(FindLongestMatch)(hasher,
+        dictionary_start = BROTLI_MIN(size_t,
+            position + 1 + position_offset, max_backward_limit);
+        FN(FindLongestMatch)(privat,
             &params->dictionary,
             ringbuffer, ringbuffer_mask, dist_cache, position + 1, max_length,
-            max_distance, gap, params->dist.max_distance, &sr2);
+            max_distance, dictionary_start + gap, params->dist.max_distance,
+            &sr2);
         if (sr2.score >= sr.score + cost_diff_lazy) {
           /* Ok, let's just write one byte for now and start a match from the
              next byte. */
@@ -76,18 +85,19 @@ static BROTLI_NOINLINE void EXPORT_FN(CreateBackwardReferences)(
       }
       apply_random_heuristics =
           position + 2 * sr.len + random_heuristics_window_size;
-      max_distance = BROTLI_MIN(size_t, position, max_backward_limit);
+      dictionary_start = BROTLI_MIN(size_t,
+          position + position_offset, max_backward_limit);
       {
         /* The first 16 codes are special short-codes,
            and the minimum offset is 1. */
         size_t distance_code = ComputeDistanceCode(
-            sr.distance, max_distance + gap, dist_cache);
-        if ((sr.distance <= (max_distance + gap)) && distance_code > 0) {
+            sr.distance, dictionary_start + gap, dist_cache);
+        if ((sr.distance <= (dictionary_start + gap)) && distance_code > 0) {
           dist_cache[3] = dist_cache[2];
           dist_cache[2] = dist_cache[1];
           dist_cache[1] = dist_cache[0];
           dist_cache[0] = (int)sr.distance;
-          FN(PrepareDistanceCache)(hasher, dist_cache);
+          FN(PrepareDistanceCache)(privat, dist_cache);
         }
         InitCommand(commands++, &params->dist, insert_length,
             sr.len, sr.len_code_delta, distance_code);
@@ -105,7 +115,7 @@ static BROTLI_NOINLINE void EXPORT_FN(CreateBackwardReferences)(
           range_start = BROTLI_MIN(size_t, range_end, BROTLI_MAX(size_t,
               range_start, position + sr.len - (sr.distance << 2)));
         }
-        FN(StoreRange)(hasher, ringbuffer, ringbuffer_mask, range_start,
+        FN(StoreRange)(privat, ringbuffer, ringbuffer_mask, range_start,
                        range_end);
       }
       position += sr.len;
@@ -131,7 +141,7 @@ static BROTLI_NOINLINE void EXPORT_FN(CreateBackwardReferences)(
           size_t pos_jump =
               BROTLI_MIN(size_t, position + 16, pos_end - kMargin);
           for (; position < pos_jump; position += 4) {
-            FN(Store)(hasher, ringbuffer, ringbuffer_mask, position);
+            FN(Store)(privat, ringbuffer, ringbuffer_mask, position);
             insert_length += 4;
           }
         } else {
@@ -140,7 +150,7 @@ static BROTLI_NOINLINE void EXPORT_FN(CreateBackwardReferences)(
           size_t pos_jump =
               BROTLI_MIN(size_t, position + 8, pos_end - kMargin);
           for (; position < pos_jump; position += 2) {
-            FN(Store)(hasher, ringbuffer, ringbuffer_mask, position);
+            FN(Store)(privat, ringbuffer, ringbuffer_mask, position);
             insert_length += 2;
           }
         }
diff --git a/modules/brotli/enc/block_splitter.c b/modules/brotli/enc/block_splitter.c
index d308eca59..deb7c2e15 100644
--- a/modules/brotli/enc/block_splitter.c
+++ b/modules/brotli/enc/block_splitter.c
@@ -132,7 +132,7 @@ void BrotliSplitBlock(MemoryManager* m,
   {
     size_t literals_count = CountLiterals(cmds, num_commands);
     uint8_t* literals = BROTLI_ALLOC(m, uint8_t, literals_count);
-    if (BROTLI_IS_OOM(m)) return;
+    if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(literals)) return;
     /* Create a continuous array of literals. */
     CopyLiteralsToByteArray(cmds, num_commands, data, pos, mask, literals);
     /* Create the block split on the array of literals.
@@ -150,7 +150,7 @@ void BrotliSplitBlock(MemoryManager* m,
     /* Compute prefix codes for commands. */
     uint16_t* insert_and_copy_codes = BROTLI_ALLOC(m, uint16_t, num_commands);
     size_t i;
-    if (BROTLI_IS_OOM(m)) return;
+    if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(insert_and_copy_codes)) return;
     for (i = 0; i < num_commands; ++i) {
       insert_and_copy_codes[i] = cmds[i].cmd_prefix_;
     }
@@ -170,7 +170,7 @@ void BrotliSplitBlock(MemoryManager* m,
     uint16_t* distance_prefixes = BROTLI_ALLOC(m, uint16_t, num_commands);
     size_t j = 0;
     size_t i;
-    if (BROTLI_IS_OOM(m)) return;
+    if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(distance_prefixes)) return;
     for (i = 0; i < num_commands; ++i) {
       const Command* cmd = &cmds[i];
       if (CommandCopyLen(cmd) && cmd->cmd_prefix_ >= 128) {
diff --git a/modules/brotli/enc/block_splitter_inc.h b/modules/brotli/enc/block_splitter_inc.h
index 023712b84..e612d6a37 100644
--- a/modules/brotli/enc/block_splitter_inc.h
+++ b/modules/brotli/enc/block_splitter_inc.h
@@ -219,7 +219,12 @@ static void FN(ClusterBlocks)(MemoryManager* m,
   uint32_t symbols[HISTOGRAMS_PER_BATCH] = { 0 };
   uint32_t remap[HISTOGRAMS_PER_BATCH] = { 0 };
 
-  if (BROTLI_IS_OOM(m)) return;
+  if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(histogram_symbols) ||
+      BROTLI_IS_NULL(block_lengths) || BROTLI_IS_NULL(all_histograms) ||
+      BROTLI_IS_NULL(cluster_size) || BROTLI_IS_NULL(histograms) ||
+      BROTLI_IS_NULL(pairs)) {
+    return;
+  }
 
   memset(block_lengths, 0, num_blocks * sizeof(uint32_t));
 
@@ -278,11 +283,11 @@ static void FN(ClusterBlocks)(MemoryManager* m,
   if (pairs_capacity < max_num_pairs + 1) {
     BROTLI_FREE(m, pairs);
     pairs = BROTLI_ALLOC(m, HistogramPair, max_num_pairs + 1);
-    if (BROTLI_IS_OOM(m)) return;
+    if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(pairs)) return;
   }
 
   clusters = BROTLI_ALLOC(m, uint32_t, num_clusters);
-  if (BROTLI_IS_OOM(m)) return;
+  if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(clusters)) return;
   for (i = 0; i < num_clusters; ++i) {
     clusters[i] = (uint32_t)i;
   }
@@ -294,7 +299,7 @@ static void FN(ClusterBlocks)(MemoryManager* m,
   BROTLI_FREE(m, cluster_size);
 
   new_index = BROTLI_ALLOC(m, uint32_t, num_clusters);
-  if (BROTLI_IS_OOM(m)) return;
+  if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(new_index)) return;
   for (i = 0; i < num_clusters; ++i) new_index[i] = kInvalidIndex;
   pos = 0;
   {
@@ -386,7 +391,7 @@ static void FN(SplitByteVector)(MemoryManager* m,
     return;
   }
   histograms = BROTLI_ALLOC(m, HistogramType, num_histograms);
-  if (BROTLI_IS_OOM(m)) return;
+  if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(histograms)) return;
   /* Find good entropy codes. */
   FN(InitialEntropyCodes)(data, length,
                           sampling_stride_length,
@@ -405,7 +410,11 @@ static void FN(SplitByteVector)(MemoryManager* m,
     uint16_t* new_id = BROTLI_ALLOC(m, uint16_t, num_histograms);
     const size_t iters = params->quality < HQ_ZOPFLIFICATION_QUALITY ? 3 : 10;
     size_t i;
-    if (BROTLI_IS_OOM(m)) return;
+    if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(block_ids) ||
+        BROTLI_IS_NULL(insert_cost) || BROTLI_IS_NULL(cost) ||
+        BROTLI_IS_NULL(switch_signal) || BROTLI_IS_NULL(new_id)) {
+      return;
+    }
     for (i = 0; i < iters; ++i) {
       num_blocks = FN(FindBlocks)(data, length,
                                   block_switch_cost,
diff --git a/modules/brotli/enc/brotli_bit_stream.c b/modules/brotli/enc/brotli_bit_stream.c
index aaf2dad7d..9348a97e1 100644
--- a/modules/brotli/enc/brotli_bit_stream.c
+++ b/modules/brotli/enc/brotli_bit_stream.c
@@ -34,33 +34,18 @@ extern "C" {
   BROTLI_DISTANCE_ALPHABET_SIZE(0, 0, BROTLI_LARGE_MAX_DISTANCE_BITS)
 /* MAX_SIMPLE_DISTANCE_ALPHABET_SIZE == 140 */
 
-/* Represents the range of values belonging to a prefix code:
-   [offset, offset + 2^nbits) */
-typedef struct PrefixCodeRange {
-  uint32_t offset;
-  uint32_t nbits;
-} PrefixCodeRange;
-
-static const PrefixCodeRange
-    kBlockLengthPrefixCode[BROTLI_NUM_BLOCK_LEN_SYMBOLS] = {
-  { 1, 2}, { 5, 2}, { 9, 2}, {13, 2}, {17, 3}, { 25, 3}, { 33, 3},
-  {41, 3}, {49, 4}, {65, 4}, {81, 4}, {97, 4}, {113, 5}, {145, 5},
-  {177, 5}, { 209,  5}, { 241,  6}, { 305,  6}, { 369,  7}, {  497,  8},
-  {753, 9}, {1265, 10}, {2289, 11}, {4337, 12}, {8433, 13}, {16625, 24}
-};
-
 static BROTLI_INLINE uint32_t BlockLengthPrefixCode(uint32_t len) {
   uint32_t code = (len >= 177) ? (len >= 753 ? 20 : 14) : (len >= 41 ? 7 : 0);
   while (code < (BROTLI_NUM_BLOCK_LEN_SYMBOLS - 1) &&
-      len >= kBlockLengthPrefixCode[code + 1].offset) ++code;
+      len >= _kBrotliPrefixCodeRanges[code + 1].offset) ++code;
   return code;
 }
 
 static BROTLI_INLINE void GetBlockLengthPrefixCode(uint32_t len, size_t* code,
     uint32_t* n_extra, uint32_t* extra) {
   *code = BlockLengthPrefixCode(len);
-  *n_extra = kBlockLengthPrefixCode[*code].nbits;
-  *extra = len - kBlockLengthPrefixCode[*code].offset;
+  *n_extra = _kBrotliPrefixCodeRanges[*code].nbits;
+  *extra = len - _kBrotliPrefixCodeRanges[*code].offset;
 }
 
 typedef struct BlockTypeCodeCalculator {
@@ -450,7 +435,7 @@ void BrotliBuildAndStoreHuffmanTreeFast(MemoryManager* m,
     const size_t max_tree_size = 2 * length + 1;
     HuffmanTree* tree = BROTLI_ALLOC(m, HuffmanTree, max_tree_size);
     uint32_t count_limit;
-    if (BROTLI_IS_OOM(m)) return;
+    if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(tree)) return;
     for (count_limit = 1; ; count_limit *= 2) {
       HuffmanTree* node = tree;
       size_t l;
@@ -714,7 +699,7 @@ static void EncodeContextMap(MemoryManager* m,
   }
 
   rle_symbols = BROTLI_ALLOC(m, uint32_t, context_map_size);
-  if (BROTLI_IS_OOM(m)) return;
+  if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(rle_symbols)) return;
   MoveToFrontTransform(context_map, context_map_size, rle_symbols);
   RunLengthCodeZeros(context_map_size, rle_symbols,
                      &num_rle_symbols, &max_run_length_prefix);
@@ -956,23 +941,21 @@ void BrotliStoreMetaBlock(MemoryManager* m,
 
   size_t pos = start_pos;
   size_t i;
-  uint32_t num_distance_symbols = params->dist.alphabet_size;
-  uint32_t num_effective_distance_symbols = num_distance_symbols;
+  uint32_t num_distance_symbols = params->dist.alphabet_size_max;
+  uint32_t num_effective_distance_symbols = params->dist.alphabet_size_limit;
   HuffmanTree* tree;
   ContextLut literal_context_lut = BROTLI_CONTEXT_LUT(literal_context_mode);
   BlockEncoder literal_enc;
   BlockEncoder command_enc;
   BlockEncoder distance_enc;
   const BrotliDistanceParams* dist = &params->dist;
-  if (params->large_window &&
-      num_effective_distance_symbols > BROTLI_NUM_HISTOGRAM_DISTANCE_SYMBOLS) {
-    num_effective_distance_symbols = BROTLI_NUM_HISTOGRAM_DISTANCE_SYMBOLS;
-  }
+  BROTLI_DCHECK(
+      num_effective_distance_symbols <= BROTLI_NUM_HISTOGRAM_DISTANCE_SYMBOLS);
 
   StoreCompressedMetaBlockHeader(is_last, length, storage_ix, storage);
 
   tree = BROTLI_ALLOC(m, HuffmanTree, MAX_HUFFMAN_TREE_SIZE);
-  if (BROTLI_IS_OOM(m)) return;
+  if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(tree)) return;
   InitBlockEncoder(&literal_enc, BROTLI_NUM_LITERAL_SYMBOLS,
       mb->literal_split.num_types, mb->literal_split.types,
       mb->literal_split.lengths, mb->literal_split.num_blocks);
@@ -1163,7 +1146,7 @@ void BrotliStoreMetaBlockTrivial(MemoryManager* m,
   uint8_t dist_depth[MAX_SIMPLE_DISTANCE_ALPHABET_SIZE];
   uint16_t dist_bits[MAX_SIMPLE_DISTANCE_ALPHABET_SIZE];
   HuffmanTree* tree;
-  uint32_t num_distance_symbols = params->dist.alphabet_size;
+  uint32_t num_distance_symbols = params->dist.alphabet_size_max;
 
   StoreCompressedMetaBlockHeader(is_last, length, storage_ix, storage);
 
@@ -1177,7 +1160,7 @@ void BrotliStoreMetaBlockTrivial(MemoryManager* m,
   BrotliWriteBits(13, 0, storage_ix, storage);
 
   tree = BROTLI_ALLOC(m, HuffmanTree, MAX_HUFFMAN_TREE_SIZE);
-  if (BROTLI_IS_OOM(m)) return;
+  if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(tree)) return;
   BuildAndStoreHuffmanTree(lit_histo.data_, BROTLI_NUM_LITERAL_SYMBOLS,
                            BROTLI_NUM_LITERAL_SYMBOLS, tree,
                            lit_depth, lit_bits,
@@ -1206,7 +1189,7 @@ void BrotliStoreMetaBlockFast(MemoryManager* m,
     BROTLI_BOOL is_last, const BrotliEncoderParams* params,
     const Command* commands, size_t n_commands,
     size_t* storage_ix, uint8_t* storage) {
-  uint32_t num_distance_symbols = params->dist.alphabet_size;
+  uint32_t num_distance_symbols = params->dist.alphabet_size_max;
   uint32_t distance_alphabet_bits =
       Log2FloorNonZero(num_distance_symbols - 1) + 1;
 
diff --git a/modules/brotli/enc/cluster_inc.h b/modules/brotli/enc/cluster_inc.h
index 22ecb3cca..3d4f40e60 100644
--- a/modules/brotli/enc/cluster_inc.h
+++ b/modules/brotli/enc/cluster_inc.h
@@ -215,7 +215,7 @@ BROTLI_INTERNAL size_t FN(BrotliHistogramReindex)(MemoryManager* m,
   uint32_t next_index;
   HistogramType* tmp;
   size_t i;
-  if (BROTLI_IS_OOM(m)) return 0;
+  if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(new_index)) return 0;
   for (i = 0; i < length; ++i) {
       new_index[i] = kInvalidIndex;
   }
@@ -229,7 +229,7 @@ BROTLI_INTERNAL size_t FN(BrotliHistogramReindex)(MemoryManager* m,
   /* TODO: by using idea of "cycle-sort" we can avoid allocation of
      tmp and reduce the number of copying by the factor of 2. */
   tmp = BROTLI_ALLOC(m, HistogramType, next_index);
-  if (BROTLI_IS_OOM(m)) return 0;
+  if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(tmp)) return 0;
   next_index = 0;
   for (i = 0; i < length; ++i) {
     if (new_index[symbols[i]] == next_index) {
@@ -259,7 +259,10 @@ BROTLI_INTERNAL void FN(BrotliClusterHistograms)(
   HistogramPair* pairs = BROTLI_ALLOC(m, HistogramPair, pairs_capacity + 1);
   size_t i;
 
-  if (BROTLI_IS_OOM(m)) return;
+  if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(cluster_size) ||
+      BROTLI_IS_NULL(clusters) || BROTLI_IS_NULL(pairs)) {
+    return;
+  }
 
   for (i = 0; i < in_size; ++i) {
     cluster_size[i] = 1;
diff --git a/modules/brotli/enc/command.c b/modules/brotli/enc/command.c
new file mode 100644
index 000000000..5e6c24919
--- /dev/null
+++ b/modules/brotli/enc/command.c
@@ -0,0 +1,28 @@
+/* Copyright 2013 Google Inc. All Rights Reserved.
+
+   Distributed under MIT license.
+   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
+*/
+
+#include "./command.h"
+
+#include <brotli/types.h>
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+const uint32_t kBrotliInsBase[BROTLI_NUM_INS_COPY_CODES] = {
+    0,  1,  2,  3,  4,   5,   6,   8,   10,   14,   18,   26,
+    34, 50, 66, 98, 130, 194, 322, 578, 1090, 2114, 6210, 22594};
+const uint32_t kBrotliInsExtra[BROTLI_NUM_INS_COPY_CODES] = {
+    0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 7, 8, 9, 10, 12, 14, 24};
+const uint32_t kBrotliCopyBase[BROTLI_NUM_INS_COPY_CODES] = {
+    2,  3,  4,  5,  6,  7,   8,   9,   10,  12,  14,   18,
+    22, 30, 38, 54, 70, 102, 134, 198, 326, 582, 1094, 2118};
+const uint32_t kBrotliCopyExtra[BROTLI_NUM_INS_COPY_CODES] = {
+    0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 7, 8, 9, 10, 24};
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}  /* extern "C" */
+#endif
diff --git a/modules/brotli/enc/command.h b/modules/brotli/enc/command.h
index 1aac85689..d84e373d0 100644
--- a/modules/brotli/enc/command.h
+++ b/modules/brotli/enc/command.h
@@ -20,14 +20,14 @@
 extern "C" {
 #endif
 
-static uint32_t kInsBase[] =   { 0, 1, 2, 3, 4, 5, 6, 8, 10, 14, 18, 26, 34, 50,
-    66, 98, 130, 194, 322, 578, 1090, 2114, 6210, 22594 };
-static uint32_t kInsExtra[] =  { 0, 0, 0, 0, 0, 0, 1, 1,  2,  2,  3,  3,  4,  4,
-    5,   5,   6,   7,   8,   9,   10,   12,   14,    24 };
-static uint32_t kCopyBase[] =  { 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 18, 22, 30,
-    38, 54,  70, 102, 134, 198, 326,   582, 1094,  2118 };
-static uint32_t kCopyExtra[] = { 0, 0, 0, 0, 0, 0, 0, 0,  1,  1,  2,  2,  3,  3,
-     4,  4,   5,   5,   6,   7,   8,     9,   10,    24 };
+BROTLI_INTERNAL extern const uint32_t
+    kBrotliInsBase[BROTLI_NUM_INS_COPY_CODES];
+BROTLI_INTERNAL extern const uint32_t
+    kBrotliInsExtra[BROTLI_NUM_INS_COPY_CODES];
+BROTLI_INTERNAL extern const uint32_t
+    kBrotliCopyBase[BROTLI_NUM_INS_COPY_CODES];
+BROTLI_INTERNAL extern const uint32_t
+    kBrotliCopyExtra[BROTLI_NUM_INS_COPY_CODES];
 
 static BROTLI_INLINE uint16_t GetInsertLengthCode(size_t insertlen) {
   if (insertlen < 6) {
@@ -89,19 +89,19 @@ static BROTLI_INLINE void GetLengthCode(size_t insertlen, size_t copylen,
 }
 
 static BROTLI_INLINE uint32_t GetInsertBase(uint16_t inscode) {
-  return kInsBase[inscode];
+  return kBrotliInsBase[inscode];
 }
 
 static BROTLI_INLINE uint32_t GetInsertExtra(uint16_t inscode) {
-  return kInsExtra[inscode];
+  return kBrotliInsExtra[inscode];
 }
 
 static BROTLI_INLINE uint32_t GetCopyBase(uint16_t copycode) {
-  return kCopyBase[copycode];
+  return kBrotliCopyBase[copycode];
 }
 
 static BROTLI_INLINE uint32_t GetCopyExtra(uint16_t copycode) {
-  return kCopyExtra[copycode];
+  return kBrotliCopyExtra[copycode];
 }
 
 typedef struct Command {
diff --git a/modules/brotli/enc/compress_fragment_two_pass.c b/modules/brotli/enc/compress_fragment_two_pass.c
index f8a560638..ca68b3813 100644
--- a/modules/brotli/enc/compress_fragment_two_pass.c
+++ b/modules/brotli/enc/compress_fragment_two_pass.c
@@ -524,7 +524,7 @@ static void StoreCommands(MemoryManager* m,
 static BROTLI_BOOL ShouldCompress(
     const uint8_t* input, size_t input_size, size_t num_literals) {
   double corpus_size = (double)input_size;
-  if (num_literals < MIN_RATIO * corpus_size) {
+  if ((double)num_literals < MIN_RATIO * corpus_size) {
     return BROTLI_TRUE;
   } else {
     uint32_t literal_histo[256] = { 0 };
diff --git a/modules/brotli/enc/dictionary_hash.c b/modules/brotli/enc/dictionary_hash.c
index 3677d7ddb..16d853fe5 100644
--- a/modules/brotli/enc/dictionary_hash.c
+++ b/modules/brotli/enc/dictionary_hash.c
@@ -13,1107 +13,1833 @@
 extern "C" {
 #endif
 
-BROTLI_INTERNAL const uint16_t kStaticDictionaryHash[32768] = {
-32072,0,0,0,0,0,0,0,0,21860,0,0,0,0,0,0,0,40486,0,0,0,0,0,45798,0,0,0,0,0,0,1292
-,0,0,0,0,4964,278,23717,0,19972,0,0,0,0,0,0,0,0,0,0,0,0,2126,16102,0,0,0,14437,0
-,0,0,0,0,0,0,26727,2253,0,0,17252,0,0,0,0,0,0,0,0,0,3622,0,0,0,0,22984,0,0,0,0,0
-,0,16647,0,34247,0,0,0,0,0,48486,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2511,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,19532,0,0,24004,0,0,0,9828,0
-,0,0,0,0,0,0,0,0,0,0,0,0,0,0,30853,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
-,0,0,0,0,0,0,0,0,0,0,31974,0,0,0,0,0,0,0,0,20650,2404,0,20773,1677,9031,0,6404,0
-,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,51879,0,0,0,0,0,0,0,0,0,0,0,0,0,0,6761,7206
-,0,0,21992,22983,0,0,3529,0,1864,0,0,0,0,0,0,11046,0,0,9641,0,0,0,6507,0,0,36934
-,21576,62375,0,0,0,0,0,0,0,0,0,8294,0,0,0,0,0,0,0,40807,0,0,0,39398,8136,0,0,0,0
-,0,0,0,8875,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7941,0,0,25609,0,0,0,936,
-3716,3213,15687,0,0,0,0,0,52519,0,17381,0,0,0,0,1320,5797,0,21029,0,0,6472,807,0
-,0,0,0,0,0,0,0,0,0,13545,0,0,0,3624,0,0,0,29674,30820,0,31237,0,6596,0,0,0,0,0,0
-,0,0,0,64070,0,0,0,0,0,0,0,0,0,0,0,22278,0,37446,0,0,0,0,7240,423,0,24612,21705,
-17636,0,0,0,0,0,0,1833,0,0,0,328,6021,0,0,0,19974,0,0,0,0,0,0,0,0,0,62119,4178,0
-,0,0,0,12100,8617,0,0,16900,0,36678,0,0,0,35366,0,51718,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,20998,0,62086,0,0,0,0,0,5542,0,0,0,0,0,0,0,0,0,0,0,14629,10952,25927,0,0,0
-,0,19849,0,0,0,0,0,0,0,30952,3046,14314,12998,0,0,0,15268,0,40582,30216,62118,0,
-0,0,20132,0,0,0,0,0,12005,0,0,0,52358,0,0,0,0,24778,0,44,33095,0,0,0,0,0,26372,0
-,0,0,0,0,3781,0,0,17928,9479,0,0,0,0,0,0,0,0,32297,28613,0,0,0,0,0,0,0,0,0,0,0,0
-,0,47174,11723,0,0,0,0,0,0,0,0,0,2536,55143,0,0,6410,0,0,0,0,0,0,0,0,56294,11914
-,0,529,0,30184,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8261,0,0,28808,58854,22633,
-965,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,64135,0,0,331,3684,0,1605,0,0,0,0,0,0,
-0,0,0,0,16650,37,0,23622,3144,15429,0,0,0,0,0,0,0,0,0,0,22443,69,0,0,0,0,0,0,0,0
-,17832,0,0,0,0,0,0,0,0,0,11113,0,0,0,0,18309,0,0,0,0,0,0,0,0,0,26630,0,0,25512,
-25895,0,0,0,0,0,0,0,0,0,0,0,16901,0,0,0,27558,0,0,9418,0,0,0,3508,0,0,0,0,0,0,0,
-0,37990,9289,8517,0,0,0,0,1578,1604,23944,0,0,14916,12781,0,0,0,0,0,0,0,12105,0,
-16617,0,0,0,0,0,0,0,0,0,0,0,0,21348,11240,28870,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,5772,0,0,27812,0,0,0,0,0,0,0,8324,0,0,0,0,0,0,0,0,0,0,16748,1157,0,0,18794,
-16324,25898,935,8333,0,0,0,0,0,0,0,0,18246,0,18086,0,46854,0,0,0,0,0,0,339,0,0,
-25188,12780,12166,6409,0,0,0,0,16516,0,27012,28395,0,0,0,0,0,0,0,1420,0,0,0,9768
-,52967,0,0,0,0,0,0,0,0,0,0,0,0,0,0,25163,324,0,0,0,0,0,0,0,0,0,64998,0,0,0,0,0,
-21893,0,0,0,0,0,47366,0,0,0,870,0,0,0,12646,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,26020,16360,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1809,0,0,0,6601,15878,0,0,0,0,0,
-29092,0,28516,0,0,0,0,0,0,0,0,0,21988,0,0,0,42950,0,0,0,0,0,0,0,0,0,0,5133,1318,
-0,0,0,0,0,0,0,0,0,0,0,54982,24904,0,0,0,0,0,0,0,0,0,0,51526,0,0,0,0,0,3685,0,0,0
-,0,10062,9412,0,0,0,31460,5708,6181,0,0,0,0,0,0,0,0,0,5575,0,0,0,0,0,0,0,0,0,0,
-27144,57478,0,0,0,0,0,0,7084,0,21993,53126,0,0,0,0,8397,0,0,5733,0,0,0,0,0,2116,
-0,24742,0,11271,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1133,0,4873,0,0,38310,0,0,0,0,0,
-0,0,0,0,0,0,0,17932,0,0,18053,0,0,0,25510,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,17798,0,
-26214,0,0,0,0,0,0,0,0,23016,17415,20392,164,0,0,0,0,0,0,0,0,0,0,0,3239,0,46119,0
-,0,0,28580,0,0,0,0,0,0,0,0,0,7621,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,41478,0,0,31016,
-55334,10056,1924,0,0,0,0,0,36614,0,36711,0,0,0,0,0,0,0,0,0,0,13994,59303,0,0,0,0
-,0,0,0,0,0,0,0,0,0,0,0,26501,0,5639,0,0,0,0,0,0,13897,1253,0,0,0,0,0,5095,0,0,0,
-28869,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8646,0,0,0,0,25641,17796,0,0,0,0,0,0,0,
-13316,620,6309,11819,0,0,0,0,0,0,0,0,0,904,1095,0,24229,0,0,28744,49703,0,23077,
-0,0,0,0,32392,0,0,0,0,35271,0,28740,5866,0,0,0,0,0,0,0,4361,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7917,8869,0,0,0,13924,0,0,0,0,
-0,41958,0,0,0,0,0,0,6766,13989,0,0,0,903,0,0,24010,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
-,0,0,0,0,0,64390,0,22468,0,25861,0,0,0,0,23656,5317,0,0,0,0,0,0,23017,5445,16009
-,0,0,0,0,0,0,0,0,48006,10473,0,0,14404,0,0,0,42183,0,0,0,51270,0,0,10602,24132,0
-,0,0,0,0,43782,0,0,17834,0,0,0,25576,27205,0,0,0,0,0,0,0,0,29066,0,0,0,0,0,626,
-1988,14700,0,0,0,0,0,0,0,0,0,0,0,0,57670,0,0,0,0,0,0,0,0,0,44710,0,0,0,0,3848,
-7623,0,0,0,0,0,0,0,0,0,0,0,42374,0,0,0,0,0,0,0,0,19272,6436,0,0,5256,0,0,0,0,0,0
-,0,0,0,0,0,0,0,0,19685,0,0,0,0,0,0,0,0,0,0,0,0,0,39783,0,0,0,0,30984,0,0,0,0,0,0
-,28230,0,0,0,29028,10538,3205,0,0,0,0,0,0,0,0,0,0,0,5636,840,295,0,0,8488,8198,0
-,0,0,0,0,0,0,0,0,20580,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4074,19526,0,0,0,0,
-31144,64038,0,0,0,0,0,0,16716,0,0,0,0,0,0,0,0,0,0,0,17706,0,0,0,0,0,0,50630,0,
-50503,0,0,0,0,0,0,0,0,0,0,0,25446,0,0,0,13831,0,0,0,0,0,0,2696,4039,0,0,0,0,
-25288,0,12076,2054,0,48934,0,0,0,0,16969,59431,17259,35335,0,0,0,0,0,0,0,0,0,0,0
-,0,31275,0,0,0,1097,0,0,0,0,0,0,0,0,0,0,0,776,839,0,0,29386,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,5864,12134,0,0,0,0,0,0,0,25349,0,0,0,0,0,0,0,0,0,61447
-,0,0,0,0,0,0,0,0,0,24678,0,0,0,63335,0,28836,8142,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4494,0,0,0,0,0,14088,1188,0,16260,0,0,0,
-16421,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,276,0,0,17060,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,24076,29445,0,33543,0,4901,0
-,0,12522,0,0,62471,0,0,0,0,0,0,0,0,0,0,4046,0,0,0,0,20486,0,15460,2217,51719,0,0
-,0,0,0,23495,0,0,0,0,0,0,15370,0,15849,0,15113,0,0,0,0,0,0,0,0,27972,7337,0,0,0,
-0,30342,0,0,0,0,0,0,0,0,32299,23940,0,17766,0,0,0,0,0,0,6184,0,20904,0,0,0,0,0,0
-,0,0,0,0,31492,0,0,0,5509,0,0,0,0,0,0,0,0,2669,50182,0,0,12299,0,0,0,0,0,0,0,
-5257,28167,0,0,0,0,0,0,0,0,0,0,0,11750,3890,0,0,26500,0,0,0,0,0,0,0,49318,0,0,0,
-0,0,0,0,10981,0,0,0,0,0,0,0,0,17961,1831,0,0,0,0,0,0,0,29638,0,0,0,0,26473,0,
-6216,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,711,0,0,0,0,0,0,0,0,0,0,28683,39975
-,0,0,0,0,0,51654,0,0,0,27527,0,0,0,0,0,0,0,0,30859,3268,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,28772,0,18212,0,0,0,0,25448,65446,0,0,0,0,
-0,0,3337,1670,0,0,0,0,0,19332,0,0,0,0,24936,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1043,0
-,0,0,0,15814,0,21670,0,0,0,0,0,0,0,16263,0,0,0,0,0,0,0,0,0,32454,0,30630,0,0,
-20170,9926,0,0,0,18247,0,0,14376,0,2056,17191,0,0,0,0,0,0,0,7812,0,0,0,0,0,0,0,0
-,0,0,0,0,0,0,22474,52806,1588,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,10825,0,
-0,0,0,40934,0,0,0,0,0,0,0,28677,0,0,5714,0,0,0,0,0,0,0,0,0,0,0,0,0,25865,22246,0
-,0,0,0,17256,35751,0,0,0,0,0,0,0,0,8236,0,32108,0,0,0,43,14342,0,16517,0,0,30732
-,0,4012,133,0,40583,971,23942,0,0,27275,0,0,0,204,0,0,27140,7564,44327,27592,
-57958,0,0,0,0,22344,25701,0,0,0,0,0,0,0,19524,31755,0,0,28102,0,59111,0,0,0,0,0,
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-8040,5702,12585,3109,0,0,0,0,0,21574,5388,0,0,0,0,0,0,0,5106,52454,0,0,0,0,0,0,0
-,0,1907,29895,0,6116,0,0,0,0,11081,5285,0,28069,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4104
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-22567,6952,2340,0,0,0,0,0,0,0,0,20360,12453,0,45094,0,0,0,0,0,28582,0,0,0,0,680,
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-1926,435,51559,0,0,0,0,0,0,0,0,0,0,0,0,0,47302,19083,0,0,12742,0,1607,0,0,0,0,0,
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-,0,20389,0,0,0,0,0,0,0,0,0,0,0,0,0,0,18889,0,0,0,0,8965,0,0,0,44358,0,0,0,8997,0
-,34055,0,0,0,0,0,29350,0,0,501,17767,0,0,32457,60262,0,0,0,30886,0,0,3757,1063,0
-,0,0,25637,0,0,0,0,0,28068,0,26374,0,0,0,0,0,0,0,0,0,0,0,11684,0,0,0,0,0,0,24779
-,229,0,13766,0,0,7402,11525,0,0,0,0,0,0,0,0,26313,23686,0,0,29736,47527,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,27268,0,0,0,0,553,0,0,0,0,0,0,32038,0,0,0,0,1135,
-26596,0,0,12300,14631,0,0,0,43238,0,871,0,0,31496,0,8457,17669,0,12836,0,0,0,
-22726,0,38758,0,0,375,6564,0,0,0,0,0,0,0,0,0,0,0,0,170,18535,0,22948,0,0,32360,0
-,0,0,0,0,0,0,0,0,0,0,0,0,0,25764,0,0,0,0,0,0,0,0,0,0,0,15652,0,0,0,32774,0,0,0,0
-,0,0,0,0,0,28551,0,0,0,0,0,0,0,0,0,0,0,0,15145,0,0,0,21100,27654,0,0,0,0,0,0,
-4874,26215,0,1639,0,0,0,0,0,0,0,0,0,0,4169,0,0,0,0,0,7336,0,0,0,0,21572,0,0,0,0,
-0,0,0,0,0,24644,1675,2533,0,0,0,53318,0,13094,0,0,0,0,0,0,0,6246,0,22020,0,0,0,0
-,0,0,0,0,0,0,0,28453,5576,5124,0,0,0,0,0,0,0,0,0,0,0,0,0,27910,0,29382,18216,
-8583,0,0,0,39174,0,43558,0,0,0,0,0,0,0,0,0,11973,0,0,0,0,0,23397,0,0,0,0,6091,0,
-0,0,0,0,0,0,6474,16197,14217,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
-,0,0,0,26728,0,567,48839,0,0,0,0,0,15271,0,0,31818,43974,2450,0,0,0,0,0,0,0,
-11368,9191,0,44454,0,0,0,0,0,0,14568,12293,0,0,0,8453,0,0,0,0,0,0,0,0,0,0,0,0,
-32040,0,0,0,0,0,0,0,0,0,0,0,0,902,0,0,0,27236,5612,11495,0,0,0,0,0,0,0,0,9194,
-23684,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,27430,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-26217,44870,0,0,0,0,0,0,5581,7173,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-52775,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,20968,18340,0,0,0,0,0,0,0,0,4107,11239
-,0,0,0,0,0,0,0,0,0,0,0,29381,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,21990,0,0,0,0
-,0,0,0,0,0,48806,0,0,0,32292,0,0,0,0,0,0,0,10884,0,0,0,0,0,0,0,0,0,0,27562,0,
-5643,0,0,0,0,0,0,0,0,0,3089,31525,0,19684,0,0,0,0,0,0,0,61415,0,0,0,0,0,36198,0,
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-11526,0,0,0,3047,0,0,0,0,0,0,22376,0,0,0,846,0,0,0,0,35815,0,0,0,23652,0,0,0,0,0
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-33511,0,0,0,0,0,9222,0,0,0,0,0,44006,0,0,0,0,0,0,0,0,0,0,0,41895,0,0,0,0,0,0,0,0
-,12044,390,0,0,0,0,0,4935,0,48646,0,56102,3052,16070,0,0,0,0,0,0,0,8612,9320,
-38311,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,500,0,0,0,0,42918,0,
-32550,0,0,0,0,0,0,0,0,27434,57926,17064,0,0,46502,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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-,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,16810,0,0,0,14510,0,0,0,0,21319,0,0,0,13508,17,
-11365,0,0,0,0,5291,0,8329,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,27685,0,0,0,0,0,0,0,
-52006,0,0,0,7493,0,44263,0,0,0,0,0,0,0,0,9800,0,0,0,25676,61478,0,0,0,0,0,0,5773
-,0,0,0,0,41991,26057,0,0,0,0,0,0,0,0,0,0,22629,0,0,0,47783,362,1959,23468,0,0,0,
-10921,0,0,0,3150,0,0,0,0,0,0,0,0,0,0,0,32456,0,0,0,0,0,0,0,4559,3270,0,0,983,0,0
-,26343,0,33446,0,0,0,61767,0,48390,0,0,0,0,0,0,0,2790,0,39782,7849,0,0,0,0,0,0,0
-,1544,2183,0,0,0,0,0,0,0,0,4040,2471,20009,30020,0,0,11242,0,0,0,5578,53382,0,
-22631,0,0,0,0,0,0,0,0,0,0,0,12901,0,0,0,0,0,0,0,0,0,0,0,0,215,0,0,9030,0,0,0,0,0
-,0,265,1412,0,0,11626,3687,0,0,0,0,0,0,0,0,0,0,0,0,17449,24359,0,0,26729,40134,0
-,0,0,0,29768,61958,0,0,0,0,0,0,0,0,20908,0,0,0,0,0,11016,0,0,47462,21547,5926,0,
-0,14728,2983,24104,15301,0,0,0,0,0,32645,0,0,0,0,0,0,0,3300,0,0,0,15972,0,0,0,0,
-0,0,6634,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3076,0,30983,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,106,0,0,0,0,12775,0,0,0,0,7177,18022,0,0,0,0,0,22534,0,0,0,0,0,0,0,0,0,0,0,
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-,16904,0,0,0,0,644,0,0,0,40038,0,0,0,37222,0,0,0,9830,0,0,0,0,0,34919,0,0,0,0,0,
-0,0,0,0,0,0,13733,0,0,0,28196,0,0,0,0,0,19876,0,0,0,0,0,0,0,23558,0,11142,0,
-27781,0,0,0,0,13864,0,0,0,24682,47847,0,0,0,0,6890,0,0,0,0,0,3981,0,0,0,0,0,0,0,
-0,0,0,0,1772,0,0,0,0,0,0,0,3603,1991,0,27396,8652,0,18312,0,0,0,0,30054,0,0,0,0,
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-,0,0,0,0,0,0,14862,0,0,3492,0,0,0,55878,0,0,0,16486,0,0,0,18119,0,0,0,0,0,0,2154
-,1284,0,0,23113,31751,0,0,29547,0,0,0,0,0,0,36647,0,0,0,0,0,0,0,0,0,0,0,18183,0,
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-43622,0,0,0,0,0,40966,0,0,0,0,0,0,0,0,0,0,246,901,11529,5191,0,0,0,0,0,0,0,0,0,0
-,0,24454,0,0,26665,27590,0,27397,0,0,0,0,0,0,23562,2949,0,0,30344,62214,0,47334,
-2026,18885,0,0,0,48678,0,0,0,22694,0,0,1972,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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-,0,31783,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4522,16039,0,0,0,0,0,0,0,0,
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-34502,32682,0,0,12997,0,0,0,0,0,2214,0,0,0,0,0,58567,0,0,0,26375,0,0,0,0,0,0,0,0
-,0,26437,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,26121,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
-,0,32005,22952,59047,0,13543,0,0,0,0,0,0,0,0,16328,0,0,33542,0,0,0,19782,0,0,0,
-16644,0,0,0,0,31688,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,10276,0,0,0,
-0,0,0,0,36327,0,0,29480,0,0,0,777,12709,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,27398,0,0,
-0,4455,9037,31397,0,9221,0,0,0,60487,20840,1796,0,0,0,0,0,0,0,0,8364,0,0,0,0,0,0
-,0,0,0,0,0,19752,44902,0,38566,0,0,18027,0,0,0,0,0,0,0,0,10662,0,0,0,0,0,11812,0
-,0,0,0,0,0,0,0,0,19910,0,0,0,45030,0,0,0,0,0,0,0,0,0,0,0,0,19978,5127,0,11620,0,
+BROTLI_INTERNAL const uint16_t kStaticDictionaryHashWords[32768] = {
+1002,0,0,0,0,0,0,0,0,683,0,0,0,0,0,0,0,1265,0,0,0,0,0,1431,0,0,0,0,0,0,40,0,0,0,
+0,155,8,741,0,624,0,0,0,0,0,0,0,0,0,0,0,0,66,503,0,0,0,451,0,0,0,0,0,0,0,835,70,
+0,0,539,0,0,0,0,0,0,0,0,0,113,0,0,0,0,718,0,0,0,0,0,0,520,0,1070,0,0,0,0,0,1515,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,78,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,610,0,0,750,0,0,0,307,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,964,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,999,0,0,0,0,0,0,0,0,
+645,75,0,649,52,282,0,200,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1621,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,211,225,0,0,687,718,0,0,110,0,58,0,0,0,0,0,0,345,0,0,301,0,0,
+0,203,0,0,1154,674,1949,0,0,0,0,0,0,0,0,0,259,0,0,0,0,0,0,0,1275,0,0,0,1231,254,
+0,0,0,0,0,0,0,277,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,248,0,0,800,0,0,0,29,
+116,100,490,0,0,0,0,0,1641,0,543,0,0,0,0,41,181,0,657,0,0,202,25,0,0,0,0,0,0,0,
+0,0,0,423,0,0,0,113,0,0,0,927,963,0,976,0,206,0,0,0,0,0,0,0,0,0,2002,0,0,0,0,0,
+0,0,0,0,0,0,696,0,1170,0,0,0,0,226,13,0,769,678,551,0,0,0,0,0,0,57,0,0,0,10,188,
+0,0,0,624,0,0,0,0,0,0,0,0,0,1941,130,0,0,0,0,378,269,0,0,528,0,1146,0,0,0,1105,
+0,1616,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,656,0,1940,0,0,0,0,0,173,0,0,0,0,0,0,0,0,0,
+0,0,457,342,810,0,0,0,0,620,0,0,0,0,0,0,0,967,95,447,406,0,0,0,477,0,1268,944,
+1941,0,0,0,629,0,0,0,0,0,375,0,0,0,1636,0,0,0,0,774,0,1,1034,0,0,0,0,0,824,0,0,
+0,0,0,118,0,0,560,296,0,0,0,0,0,0,0,0,1009,894,0,0,0,0,0,0,0,0,0,0,0,0,0,1474,
+366,0,0,0,0,0,0,0,0,0,79,1723,0,0,200,0,0,0,0,0,0,0,0,1759,372,0,16,0,943,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,258,0,0,900,1839,707,30,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,2004,0,0,10,115,0,50,0,0,0,0,0,0,0,0,0,0,520,1,0,738,98,482,0,0,0,0,
+0,0,0,0,0,0,701,2,0,0,0,0,0,0,0,0,557,0,0,0,0,0,0,0,0,0,347,0,0,0,0,572,0,0,0,0,
+0,0,0,0,0,832,0,0,797,809,0,0,0,0,0,0,0,0,0,0,0,528,0,0,0,861,0,0,294,0,0,0,109,
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+0,0,0,172,0,0,0,1029,0,0,0,0,0,0,0,0,0,568,0,0,0,732,617,0,0,974,94,989,733,0,0,
+0,0,0,0,1789,0,0,665,2015,0,0,0,0,0,0,806,287,0,0,0,0,0,1539,0,0,0,0,0,0,0,0,0,
+0,182,1563,0,0,0,0,0,0,0,0,0,484,0,0,0,0,0,1623,0,0,0,0,0,0,0,0,878,1833,0,1569,
+0,0,0,0,0,0,0,0,93,0,715,994,0,0,0,0,0,63,0,591,0,0,0,0,0,0,0,749,0,0,0,0,547,
+366,0,0,0,1747,0,0,0,0,0,0,0,89,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1463,0,772,
+893,0,0,0,48,0,0,941,0,0,690,1785,106,440,0,0,0,0,0,0,0,0,0,0,32,0,332,216,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,852,0,
+0,416,564,0,918,0,1764,0,0,3,0,0,274,0,0,0,0,501,0,0,0,0,0,0,0,851,743,0,49,0,
+879,0,0,47,0,0,0,0,0,0,865,0,1202,0,0,0,0,0,0,47,272,0,0,0,0,0,0,0,0,0,0,0,1455,
+0,0,0,0,891,1911,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,761,0,0,0,0,0,0,0,0,0,407,0,
+183,0,0,490,0,0,0,0,0,0,0,35,731,0,0,0,0,0,0,0,819,0,0,0,0,0,0,0,0,0,0,0,0,0,
+575,0,0,0,0,45,818,0,0,77,222,0,0,0,0,849,1880,0,0,0,633,0,1308,0,0,0,0,0,0,0,0,
+0,0,86,0,0,0,0,0,0,0,0,0,0,0,0,0,0,817,0,0,0,0,0,0,0,0,0,882,0,0,0,914,0,0,0,0,
+0,0,0,0,0,0,865,0,0,426,399,58,0,0,0,0,0,0,538,102,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,876,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,139,566,0,63,12,0,0,0,
+0,0,0,0,0,0,0,0,0,0,3,114,0,0,0,0,0,0,0,0,576,0,0,0,0,0,0,0,0,933,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,692,0,0,0,0,0,0,0,0,0,0,0,0,752,0,0,0,0,
+0,0,0,0,375,0,1011,0,0,96,0,0,0,0,0,0,0,0,0,148,0,0,0,0,0,0,0,0,0,0,0,337,56,
+666,0,246,394,0,0,0,0,0,0,0,0,437,0,0,0,506,0,0,0,0,1003,0,1163,0,328,0,0,0,0,0,
+0,0,0,1000,0,0,0,0,0,744,101,0,0,0,0,0,726,0,0,176,0,146,9,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,839,0,0,0,0,0,0,223,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,246,1931,29,0,0,1771,0,0,0,0,0,846,6,157,0,0,0,0,0,0,0,0,0,875,0,0,477,
+773,177,639,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1747,0,0,0,0,158,873,0,659,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,391,0,0,0,0,0,0,0,0,0,0,0,0,668,883,0,78,628,0,0,0,
+0,0,0,0,0,0,0,0,0,1460,0,962,0,0,0,0,0,460,0,0,0,0,0,0,0,0,0,0,0,0,0,0,34,199,0,
+0,0,388,474,0,271,0,333,608,0,0,0,0,0,0,49,0,988,0,707,617,0,0,0,0,0,0,0,756,0,
+0,0,0,0,1583,0,0,0,0,0,0,0,0,0,0,285,0,0,0,0,0,0,0,0,0,0,0,0,0,0,344,0,0,0,0,0,
+0,0,0,515,1709,0,0,0,0,0,0,0,0,404,0,0,0,0,500,0,0,0,0,0,0,0,0,0,68,216,0,0,0,0,
+0,0,0,488,353,0,0,177,236,0,0,458,490,0,0,0,0,0,0,756,1504,0,757,0,1735,0,0,108,
+598,0,0,0,0};
+BROTLI_INTERNAL const uint8_t kStaticDictionaryHashLengths[32768] = {
+8,0,0,0,0,0,0,0,0,4,0,0,0,0,0,0,0,6,0,0,0,0,0,6,0,0,0,0,0,0,12,0,0,0,0,4,22,5,0,
+4,0,0,0,0,0,0,0,0,0,0,0,0,14,6,0,0,0,5,0,0,0,0,0,0,0,7,13,0,0,4,0,0,0,0,0,0,0,0,
+0,6,0,0,0,0,8,0,0,0,0,0,0,7,0,7,0,0,0,0,0,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,15,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,12,0,0,4,0,0,0,4,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,6,0,0,0,0,0,0,0,0,10,4,0,5,13,7,0,4,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,9,6,0,0,8,7,0,0,9,0,8,0,0,0,0,0,0,6,0,
+0,9,0,0,0,11,0,0,6,8,7,0,0,0,0,0,0,0,0,0,6,0,0,0,0,0,0,0,7,0,0,0,6,8,0,0,0,0,0,
+0,0,11,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,5,0,0,9,0,0,0,8,4,13,7,0,0,0,0,0,
+7,0,5,0,0,0,0,8,5,0,5,0,0,8,7,0,0,0,0,0,0,0,0,0,0,9,0,0,0,8,0,0,0,10,4,0,5,0,4,
+0,0,0,0,0,0,0,0,0,6,0,0,0,0,0,0,0,0,0,0,0,6,0,6,0,0,0,0,8,7,0,4,9,4,0,0,0,0,0,0,
+9,0,0,0,8,5,0,0,0,6,0,0,0,0,0,0,0,0,0,7,18,0,0,0,0,4,9,0,0,4,0,6,0,0,0,6,0,6,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,6,0,6,0,0,0,0,0,6,0,0,0,0,0,0,0,0,0,0,0,5,8,7,0,0,0,
+0,9,0,0,0,0,0,0,0,8,6,10,6,0,0,0,4,0,6,8,6,0,0,0,4,0,0,0,0,0,5,0,0,0,6,0,0,0,0,
+10,0,12,7,0,0,0,0,0,4,0,0,0,0,0,5,0,0,8,7,0,0,0,0,0,0,0,0,9,5,0,0,0,0,0,0,0,0,0,
+0,0,0,0,6,11,0,0,0,0,0,0,0,0,0,8,7,0,0,10,0,0,0,0,0,0,0,0,6,10,0,17,0,8,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,5,0,0,8,6,9,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+7,0,0,11,4,0,5,0,0,0,0,0,0,0,0,0,0,10,5,0,6,8,5,0,0,0,0,0,0,0,0,0,0,11,5,0,0,0,
+0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,9,0,0,0,0,5,0,0,0,0,0,0,0,0,0,6,0,0,8,7,0,0,0,0,0,
+0,0,0,0,0,0,5,0,0,0,6,0,0,10,0,0,0,20,0,0,0,0,0,0,0,0,6,9,5,0,0,0,0,10,4,8,0,0,
+4,13,0,0,0,0,0,0,0,9,0,9,0,0,0,0,0,0,0,0,0,0,0,0,4,8,6,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,12,0,0,4,0,0,0,0,0,0,0,4,0,0,0,0,0,0,0,0,0,0,12,5,0,0,10,4,10,7,13,
+0,0,0,0,0,0,0,0,6,0,6,0,6,0,0,0,0,0,0,19,0,0,4,12,6,9,0,0,0,0,4,0,4,11,0,0,0,0,
+0,0,0,12,0,0,0,8,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,11,4,0,0,0,0,0,0,0,0,0,6,0,0,0,0,
+0,5,0,0,0,0,0,6,0,0,0,6,0,0,0,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,8,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,17,0,0,0,9,6,0,0,0,0,0,4,0,4,0,0,0,0,0,0,0,0,0,4,0,0,0,
+6,0,0,0,0,0,0,0,0,0,0,13,6,0,0,0,0,0,0,0,0,0,0,0,6,8,0,0,0,0,0,0,0,0,0,0,6,0,0,
+0,0,0,5,0,0,0,0,14,4,0,0,0,4,12,5,0,0,0,0,0,0,0,0,0,7,0,0,0,0,0,0,0,0,0,0,8,6,0,
+0,0,0,0,0,12,0,9,6,0,0,0,0,13,0,0,5,0,0,0,0,0,4,0,6,0,7,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,13,0,9,0,0,6,0,0,0,0,0,0,0,0,0,0,0,0,12,0,0,5,0,0,0,6,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,6,0,6,0,0,0,0,0,0,0,0,8,7,8,4,0,0,0,0,0,0,0,0,0,0,0,7,0,7,0,0,0,4,0,
+0,0,0,0,0,0,0,0,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,6,0,0,8,6,8,4,0,0,0,0,0,6,0,7,0,
+0,0,0,0,0,0,0,0,0,10,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,5,0,7,0,0,0,0,0,0,9,5,0,0,
+0,0,0,7,0,0,0,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,6,0,0,0,0,9,4,0,0,0,0,0,0,0,4,
+12,5,11,0,0,0,0,0,0,0,0,0,8,7,0,5,0,0,8,7,0,5,0,0,0,0,8,0,0,0,0,7,0,4,10,0,0,0,
+0,0,0,0,9,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+13,5,0,0,0,4,0,0,0,0,0,6,0,0,0,0,0,0,14,5,0,0,0,7,0,0,10,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,6,0,4,0,5,0,0,0,0,8,5,0,0,0,0,0,0,9,5,9,0,0,0,0,0,0,0,0,6,9,0,
+0,4,0,0,0,7,0,0,0,6,0,0,10,4,0,0,0,0,0,6,0,0,10,0,0,0,8,5,0,0,0,0,0,0,0,0,10,0,
+0,0,0,0,18,4,12,0,0,0,0,0,0,0,0,0,0,0,0,6,0,0,0,0,0,0,0,0,0,6,0,0,0,0,8,7,0,0,0,
+0,0,0,0,0,0,0,0,6,0,0,0,0,0,0,0,0,8,4,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,5,0,0,0,
+0,0,0,0,0,0,0,0,0,0,7,0,0,0,0,8,0,0,0,0,0,0,6,0,0,0,4,10,5,0,0,0,0,0,0,0,0,0,0,
+0,4,8,7,0,0,8,6,0,0,0,0,0,0,0,0,0,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,10,6,0,
+0,0,0,8,6,0,0,0,0,0,0,12,0,0,0,0,0,0,0,0,0,0,0,10,0,0,0,0,0,0,6,0,7,0,0,0,0,0,0,
+0,0,0,0,0,6,0,0,0,7,0,0,0,0,0,0,8,7,0,0,0,0,8,0,12,6,0,6,0,0,0,0,9,7,11,7,0,0,0,
+0,0,0,0,0,0,0,0,0,11,0,0,0,9,0,0,0,0,0,0,0,0,0,0,0,8,7,0,0,10,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,6,0,0,0,0,0,0,0,5,0,0,0,0,0,0,0,0,0,7,0,0,0,0,0,0,
+0,0,0,6,0,0,0,7,0,4,14,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,14,0,0,0,0,0,8,4,0,4,0,0,0,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,20,0,0,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,12,5,0,7,0,5,0,0,10,0,0,7,0,0,0,0,0,0,0,0,0,0,14,0,0,0,0,6,0,4,9,7,0,0,0,
+0,0,7,0,0,0,0,0,0,10,0,9,0,9,0,0,0,0,0,0,0,0,4,9,0,0,0,0,6,0,0,0,0,0,0,0,0,11,4,
+0,6,0,0,0,0,0,0,8,0,8,0,0,0,0,0,0,0,0,0,0,4,0,0,0,5,0,0,0,0,0,0,0,0,13,6,0,0,11,
+0,0,0,0,0,0,0,9,7,0,0,0,0,0,0,0,0,0,0,0,6,18,0,0,4,0,0,0,0,0,0,0,6,0,0,0,0,0,0,
+0,5,0,0,0,0,0,0,0,0,9,7,0,0,0,0,0,0,0,6,0,0,0,0,9,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,7,0,0,0,0,0,0,0,0,0,0,11,7,0,0,0,0,0,6,0,0,0,7,0,0,0,0,0,0,0,0,11,
+4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,0,4,0,0,0,0,8,
+6,0,0,0,0,0,0,9,6,0,0,0,0,0,4,0,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,19,0,0,0,
+0,6,0,6,0,0,0,0,0,0,0,7,0,0,0,0,0,0,0,0,0,6,0,6,0,0,10,6,0,0,0,7,0,0,8,0,8,7,0,
+0,0,0,0,0,0,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,10,6,20,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,9,0,0,0,0,6,0,0,0,0,0,0,0,5,0,0,18,0,0,0,0,0,0,0,0,0,0,0,0,0,9,6,0,
+0,0,0,8,7,0,0,0,0,0,0,0,0,12,0,12,0,0,0,11,6,0,5,0,0,12,0,12,5,0,7,11,6,0,0,11,
+0,0,0,12,0,0,4,12,7,8,6,0,0,0,0,8,5,0,0,0,0,0,0,0,4,11,0,0,6,0,7,0,0,0,0,0,0,0,
+5,0,6,0,0,0,0,8,0,10,0,0,0,0,0,0,0,0,0,0,0,9,7,0,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,11,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,0,0,0,0,0,0,0,0,0,0,0,0,0,6,0,0,0,
+0,0,0,0,0,0,0,0,0,11,7,0,0,0,0,0,0,10,0,0,5,0,0,12,6,0,0,0,0,0,0,10,6,0,0,0,0,8,
+6,0,0,0,0,0,0,0,0,0,0,0,0,0,7,0,5,0,0,0,0,11,0,10,6,0,0,8,6,0,0,0,6,0,7,10,6,0,
+0,0,7,0,0,0,0,0,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,0,0,0,0,10,7,0,0,0,0,
+10,6,0,0,0,0,0,0,8,5,11,0,8,4,0,0,0,4,0,0,0,0,9,4,8,0,0,0,0,0,0,0,11,6,0,0,0,0,
+10,7,0,0,0,0,0,6,0,0,0,0,0,6,0,0,0,7,0,0,0,0,9,6,0,5,0,7,0,0,0,0,0,7,0,0,11,0,0,
+0,0,0,0,0,0,0,0,0,0,0,12,0,0,0,0,0,0,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,6,
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+0,0,0,7,0,0,0,0,0,0,0,0,0,0,0,5,0,0,0,0,0,0,0,0,0,0,0,0,0,6,0,0,0,0,0,0,0,0,0,6,
+0,0,0,0,8,7,0,0,0,0,0,0,12,0,0,6,0,0,0,0,0,0,0,6,8,4,0,0,10,7,0,0,10,0,0,0,0,0,
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+0,4,0,0,0,0,0,6,0,0,0,0,0,0,8,0,0,6,0,0,0,6,0,0,0,0,0,7,0,5,8,4,0,0,9,0,0,0,0,4,
+0,0,0,0,0,0,0,0,0,5,0,0,15,6,8,6,0,0,0,6,0,0,0,0,0,4,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,6,0,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,5,0,0,9,6,0,0,0,0,0,0,0,7,0,0,0,4,0,
+6,0,0,0,0,0,0,0,6,0,0,0,0,0,0,0,6,0,0,0,0,0,0,11,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,9,5,0,6,12,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,11,6,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,6,0,0,8,7,0,6,0,0,0,0,0,0,0,0,0,0,0,0,11,0,12,7,0,0,0,0,
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+7,0,0,0,0,0,0,0,0,0,6,0,0,0,0,0,7,8,7,9,6,0,0,0,0,0,0,0,0,8,6,0,0,0,0,0,5,12,0,
+10,5,12,6,0,0,0,7,0,0,0,0,0,0,0,5,0,0,0,5,9,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,
+11,7,0,0,0,0,0,0,0,0,0,0,17,0,0,0,0,0,0,6,0,7,0,0,0,0,8,0,8,5,0,6,0,0,0,6,0,0,0,
+0,0,0,0,6,0,6,0,6,9,0,0,5,17,0,0,0,0,0,0,0,0,0,0,0,0,0,9,0,0,0,0,0,0,0,0,7,0,0,
+0,0,0,7,0,0,0,0,16,5,0,0,0,0,0,0,0,4,0,0,0,5,11,5,0,7,0,0,0,4,8,7,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,11,7,0,0,0,0,12,0,0,0,
+0,0,12,0,0,0,0,0,0,0,0,4,10,4,0,0,0,0,0,0,0,0,0,4,0,0,0,0,0,6,0,0,0,0,0,0,0,4,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,11,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,0,0,20,5,0,0,
+10,0,0,0,0,0,0,0,0,0,0,6,0,0,0,6,12,0,0,0,0,0,0,6,0,0,0,0,0,0,9,4,10,7,0,4,0,0,
+0,0,0,0,10,6,0,0,0,0,8,4,0,7,8,6,0,6,8,0,10,0,0,0,0,0,13,5,0,6,0,0,0,0,0,0,22,4,
+0,0,0,0,0,0,0,0,0,0,9,0,0,0,0,6,0,0,0,6,0,0,0,0,0,0,0,6,0,0,0,0,0,0,0,0,0,6,10,
+5,8,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,10,0,0,0,0,0,10,4,0,0,10,7,0,0,0,0,0,5,0,
+5,8,0,0,0,0,6,0,0,0,0,0,0,0,5,0,0,0,0,0,0,0,0,0,0,10,7,0,0,0,4,0,0,0,0,0,6,0,0,
+0,0,0,0,0,0,8,7,0,0,0,0,0,0,0,0,0,0,0,0,11,0,0,0,0,7,0,0,0,6,0,0,0,0,0,0,0,0,0,
+4,0,0,0,4,10,0,0,6,13,7,8,0,0,0,0,0,0,7,0,0,12,7,0,0,0,0,0,0,10,5,0,0,0,0,0,6,0,
+0,0,0,0,0,0,0,0,0,13,7,0,0,0,0,0,0,0,0,0,7,0,0,0,0,0,6,0,0,0,0,0,0,0,0,8,6,0,6,
+0,0,0,0,0,0,0,0,12,0,8,4,0,0,0,0,0,4,0,4,0,0,0,0,0,0,0,5,0,0,0,0,12,5,0,0,0,7,0,
+0,0,0,0,0,0,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,6,0,6,10,0,0,0,20,0,0,5,0,0,10,
+7,11,7,0,0,0,0,0,0,0,0,0,0,17,0,9,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,5,0,0,10,7,0,4,0,6,0,0,24,0,0,5,0,0,0,0,8,0,0,
+0,0,0,0,0,10,5,0,4,0,6,0,0,8,0,0,0,0,0,0,4,0,6,0,0,0,0,0,0,9,5,0,0,0,0,0,0,0,0,
+0,0,0,6,0,0,0,0,9,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,0,0,0,0,0,0,0,0,0,4,0,7,
+0,0,13,0,0,0,0,0,0,0,11,6,0,0,0,0,0,0,0,4,0,0,0,0,0,0,0,0,0,0,0,0,0,4,0,0,0,0,
+17,7,0,0,11,6,0,0,0,0,12,6,0,0,0,6,0,6,0,0,0,0,0,0,0,0,0,0,10,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,4,0,0,0,0,0,0,0,0,0,5,0,0,0,6,0,0,0,0,0,0,0,0,0,0,10,0,0,4,8,6,0,0,0,
+0,0,0,9,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,9,5,0,7,18,0,0,0,0,0,0,0,0,0,0,0,0,0,8,6,0,0,0,0,0,0,0,0,8,0,0,0,
+0,0,0,0,0,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,6,0,0,0,0,0,0,
+0,0,0,0,0,0,10,0,0,0,0,0,0,0,0,4,0,6,0,0,9,0,0,0,0,0,0,0,0,0,13,0,0,0,0,0,0,0,0,
+0,0,0,8,7,10,0,8,5,0,0,0,0,0,0,0,0,9,0,0,0,10,0,0,0,0,6,0,7,0,4,0,0,0,0,0,0,0,0,
+8,0,0,0,0,0,8,4,0,0,0,0,0,5,0,0,10,0,12,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+4,0,0,0,0,0,0,12,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,18,6,11,0,0,
+7,0,0,0,0,0,6,10,5,0,0,0,0,0,0,0,0,0,5,0,0,9,5,12,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,6,0,0,0,0,13,6,0,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,5,0,0,0,0,0,0,0,0,0,
+0,0,0,8,4,0,6,12,0,0,0,0,0,0,0,0,0,0,0,0,6,0,6,0,0,0,0,0,5,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,11,4,0,0,0,6,14,0,11,0,9,6,0,0,0,0,0,0,22,0,12,0,8,6,0,0,0,0,0,0,0,6,0,
+0,0,0,0,6,0,0,0,0,0,0,0,0,0,0,11,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,0,0,0,0,0,0,0,0,
+10,7,0,0,0,0,0,0,0,0,9,0,0,0,0,4,0,0,0,0,0,0,0,0,0,5,11,0,0,0,0,0,0,0,8,6,0,0,9,
+7,0,0,12,4,0,0,0,0,0,0,12,6,0,6,0,7,0,0,8,5,0,0,0,0};
 
 #if defined(__cplusplus) || defined(c_plusplus)
 }  /* extern "C" */
diff --git a/modules/brotli/enc/dictionary_hash.h b/modules/brotli/enc/dictionary_hash.h
index b3bb9599f..e553ea5d4 100644
--- a/modules/brotli/enc/dictionary_hash.h
+++ b/modules/brotli/enc/dictionary_hash.h
@@ -15,7 +15,8 @@
 extern "C" {
 #endif
 
-extern const uint16_t kStaticDictionaryHash[32768];
+extern const uint16_t kStaticDictionaryHashWords[32768];
+extern const uint8_t kStaticDictionaryHashLengths[32768];
 
 #if defined(__cplusplus) || defined(c_plusplus)
 }  /* extern "C" */
diff --git a/modules/brotli/enc/encode.c b/modules/brotli/enc/encode.c
index 141e70aa2..8d90937b4 100644
--- a/modules/brotli/enc/encode.c
+++ b/modules/brotli/enc/encode.c
@@ -54,12 +54,19 @@ typedef enum BrotliEncoderStreamState {
   BROTLI_STREAM_METADATA_BODY = 4
 } BrotliEncoderStreamState;
 
+typedef enum BrotliEncoderFlintState {
+  BROTLI_FLINT_NEEDS_2_BYTES = 2,
+  BROTLI_FLINT_NEEDS_1_BYTE = 1,
+  BROTLI_FLINT_WAITING_FOR_PROCESSING = 0,
+  BROTLI_FLINT_WAITING_FOR_FLUSHING = -1,
+  BROTLI_FLINT_DONE = -2
+} BrotliEncoderFlintState;
+
 typedef struct BrotliEncoderStateStruct {
   BrotliEncoderParams params;
 
   MemoryManager memory_manager_;
 
-  HasherHandle hasher_;
   uint64_t input_pos_;
   RingBuffer ringbuffer_;
   size_t cmd_alloc_size_;
@@ -73,10 +80,17 @@ typedef struct BrotliEncoderStateStruct {
   int saved_dist_cache_[4];
   uint16_t last_bytes_;
   uint8_t last_bytes_bits_;
+  /* "Flint" is a tiny uncompressed block emitted before the continuation
+     block to unwire literal context from previous data. Despite being int8_t,
+     field is actually BrotliEncoderFlintState enum. */
+  int8_t flint_;
   uint8_t prev_byte_;
   uint8_t prev_byte2_;
   size_t storage_size_;
   uint8_t* storage_;
+
+  Hasher hasher_;
+
   /* Hash table for FAST_ONE_PASS_COMPRESSION_QUALITY mode. */
   int small_table_[1 << 10];  /* 4KiB */
   int* large_table_;          /* Allocated only when needed */
@@ -114,8 +128,6 @@ typedef struct BrotliEncoderStateStruct {
   BROTLI_BOOL is_initialized_;
 } BrotliEncoderStateStruct;
 
-static BROTLI_BOOL EnsureInitialized(BrotliEncoderState* s);
-
 static size_t InputBlockSize(BrotliEncoderState* s) {
   return (size_t)1 << s->params.lgblock;
 }
@@ -174,6 +186,11 @@ BROTLI_BOOL BrotliEncoderSetParameter(
       state->params.dist.num_direct_distance_codes = value;
       return BROTLI_TRUE;
 
+    case BROTLI_PARAM_STREAM_OFFSET:
+      if (value > (1u << 30)) return BROTLI_FALSE;
+      state->params.stream_offset = value;
+      return BROTLI_TRUE;
+
     default: return BROTLI_FALSE;
   }
 }
@@ -195,7 +212,7 @@ static uint8_t* GetBrotliStorage(BrotliEncoderState* s, size_t size) {
   if (s->storage_size_ < size) {
     BROTLI_FREE(m, s->storage_);
     s->storage_ = BROTLI_ALLOC(m, uint8_t, size);
-    if (BROTLI_IS_OOM(m)) return NULL;
+    if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(s->storage_)) return NULL;
     s->storage_size_ = size;
   }
   return s->storage_;
@@ -234,7 +251,7 @@ static int* GetHashTable(BrotliEncoderState* s, int quality,
       s->large_table_size_ = htsize;
       BROTLI_FREE(m, s->large_table_);
       s->large_table_ = BROTLI_ALLOC(m, int, htsize);
-      if (BROTLI_IS_OOM(m)) return 0;
+      if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(s->large_table_)) return 0;
     }
     table = s->large_table_;
   }
@@ -499,7 +516,7 @@ static BROTLI_BOOL ShouldCompress(
   /* TODO: find more precise minimal block overhead. */
   if (bytes <= 2) return BROTLI_FALSE;
   if (num_commands < (bytes >> 8) + 2) {
-    if (num_literals > 0.99 * (double)bytes) {
+    if ((double)num_literals > 0.99 * (double)bytes) {
       uint32_t literal_histo[256] = { 0 };
       static const uint32_t kSampleRate = 13;
       static const double kMinEntropy = 7.92;
@@ -617,11 +634,7 @@ static void WriteMetaBlockInternal(MemoryManager* m,
       /* The number of distance symbols effectively used for distance
          histograms. It might be less than distance alphabet size
          for "Large Window Brotli" (32-bit). */
-      uint32_t num_effective_dist_codes = block_params.dist.alphabet_size;
-      if (num_effective_dist_codes > BROTLI_NUM_HISTOGRAM_DISTANCE_SYMBOLS) {
-        num_effective_dist_codes = BROTLI_NUM_HISTOGRAM_DISTANCE_SYMBOLS;
-      }
-      BrotliOptimizeHistograms(num_effective_dist_codes, &mb);
+      BrotliOptimizeHistograms(block_params.dist.alphabet_size_limit, &mb);
     }
     BrotliStoreMetaBlock(m, data, wrapped_last_flush_pos, bytes, mask,
                          prev_byte, prev_byte2,
@@ -678,12 +691,23 @@ static BROTLI_BOOL EnsureInitialized(BrotliEncoderState* s) {
 
   s->last_bytes_bits_ = 0;
   s->last_bytes_ = 0;
+  s->flint_ = BROTLI_FLINT_DONE;
   s->remaining_metadata_bytes_ = BROTLI_UINT32_MAX;
 
   SanitizeParams(&s->params);
   s->params.lgblock = ComputeLgBlock(&s->params);
   ChooseDistanceParams(&s->params);
 
+  if (s->params.stream_offset != 0) {
+    s->flint_ = BROTLI_FLINT_NEEDS_2_BYTES;
+    /* Poison the distance cache. -16 +- 3 is still less than zero (invalid). */
+    s->dist_cache_[0] = -16;
+    s->dist_cache_[1] = -16;
+    s->dist_cache_[2] = -16;
+    s->dist_cache_[3] = -16;
+    memcpy(s->saved_dist_cache_, s->dist_cache_, sizeof(s->saved_dist_cache_));
+  }
+
   RingBufferSetup(&s->params, &s->ringbuffer_);
 
   /* Initialize last byte with stream header. */
@@ -693,8 +717,14 @@ static BROTLI_BOOL EnsureInitialized(BrotliEncoderState* s) {
         s->params.quality == FAST_TWO_PASS_COMPRESSION_QUALITY) {
       lgwin = BROTLI_MAX(int, lgwin, 18);
     }
-    EncodeWindowBits(lgwin, s->params.large_window,
-                     &s->last_bytes_, &s->last_bytes_bits_);
+    if (s->params.stream_offset == 0) {
+      EncodeWindowBits(lgwin, s->params.large_window,
+                       &s->last_bytes_, &s->last_bytes_bits_);
+    } else {
+      /* Bigger values have the same effect, but could cause overflows. */
+      s->params.stream_offset = BROTLI_MIN(size_t,
+          s->params.stream_offset, BROTLI_MAX_BACKWARD_LIMIT(lgwin));
+    }
   }
 
   if (s->params.quality == FAST_ONE_PASS_COMPRESSION_QUALITY) {
@@ -712,13 +742,15 @@ static void BrotliEncoderInitParams(BrotliEncoderParams* params) {
   params->quality = BROTLI_DEFAULT_QUALITY;
   params->lgwin = BROTLI_DEFAULT_WINDOW;
   params->lgblock = 0;
+  params->stream_offset = 0;
   params->size_hint = 0;
   params->disable_literal_context_modeling = BROTLI_FALSE;
   BrotliInitEncoderDictionary(&params->dictionary);
   params->dist.distance_postfix_bits = 0;
   params->dist.num_direct_distance_codes = 0;
-  params->dist.alphabet_size =
+  params->dist.alphabet_size_max =
       BROTLI_DISTANCE_ALPHABET_SIZE(0, 0, BROTLI_MAX_DISTANCE_BITS);
+  params->dist.alphabet_size_limit = params->dist.alphabet_size_max;
   params->dist.max_distance = BROTLI_MAX_DISTANCE;
 }
 
@@ -734,7 +766,7 @@ static void BrotliEncoderInitState(BrotliEncoderState* s) {
   s->prev_byte2_ = 0;
   s->storage_size_ = 0;
   s->storage_ = 0;
-  s->hasher_ = NULL;
+  HasherInit(&s->hasher_);
   s->large_table_ = NULL;
   s->large_table_size_ = 0;
   s->cmd_code_numbits_ = 0;
@@ -902,6 +934,7 @@ static void ExtendLastCommand(BrotliEncoderState* s, uint32_t* bytes,
         (*bytes)--;
         (*wrapped_last_processed_pos)++;
       }
+    } else {
     }
     /* The copy length is at most the metablock size, and thus expressible. */
     GetLengthCode(last_command->insert_len_,
@@ -934,6 +967,7 @@ static BROTLI_BOOL EncodeData(
   uint32_t mask;
   MemoryManager* m = &s->memory_manager_;
   ContextType literal_context_mode;
+  ContextLut literal_context_lut;
 
   data = s->ringbuffer_.buffer_;
   mask = s->ringbuffer_.mask_;
@@ -951,7 +985,10 @@ static BROTLI_BOOL EncodeData(
         BROTLI_ALLOC(m, uint32_t, kCompressFragmentTwoPassBlockSize);
     s->literal_buf_ =
         BROTLI_ALLOC(m, uint8_t, kCompressFragmentTwoPassBlockSize);
-    if (BROTLI_IS_OOM(m)) return BROTLI_FALSE;
+    if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(s->command_buf_) ||
+        BROTLI_IS_NULL(s->literal_buf_)) {
+      return BROTLI_FALSE;
+    }
   }
 
   if (s->params.quality == FAST_ONE_PASS_COMPRESSION_QUALITY ||
@@ -1009,7 +1046,7 @@ static BROTLI_BOOL EncodeData(
       newsize += (bytes / 4) + 16;
       s->cmd_alloc_size_ = newsize;
       new_commands = BROTLI_ALLOC(m, Command, newsize);
-      if (BROTLI_IS_OOM(m)) return BROTLI_FALSE;
+      if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(new_commands)) return BROTLI_FALSE;
       if (s->commands_) {
         memcpy(new_commands, s->commands_, sizeof(Command) * s->num_commands_);
         BROTLI_FREE(m, s->commands_);
@@ -1024,6 +1061,7 @@ static BROTLI_BOOL EncodeData(
   literal_context_mode = ChooseContextMode(
       &s->params, data, WrapPosition(s->last_flush_pos_),
       mask, (size_t)(s->input_pos_ - s->last_flush_pos_));
+  literal_context_lut = BROTLI_CONTEXT_LUT(literal_context_mode);
 
   if (BROTLI_IS_OOM(m)) return BROTLI_FALSE;
 
@@ -1034,20 +1072,23 @@ static BROTLI_BOOL EncodeData(
   if (s->params.quality == ZOPFLIFICATION_QUALITY) {
     BROTLI_DCHECK(s->params.hasher.type == 10);
     BrotliCreateZopfliBackwardReferences(m, bytes, wrapped_last_processed_pos,
-        data, mask, &s->params, s->hasher_, s->dist_cache_,
+        data, mask, literal_context_lut, &s->params,
+        &s->hasher_, s->dist_cache_,
         &s->last_insert_len_, &s->commands_[s->num_commands_],
         &s->num_commands_, &s->num_literals_);
     if (BROTLI_IS_OOM(m)) return BROTLI_FALSE;
   } else if (s->params.quality == HQ_ZOPFLIFICATION_QUALITY) {
     BROTLI_DCHECK(s->params.hasher.type == 10);
     BrotliCreateHqZopfliBackwardReferences(m, bytes, wrapped_last_processed_pos,
-        data, mask, &s->params, s->hasher_, s->dist_cache_,
+        data, mask, literal_context_lut, &s->params,
+        &s->hasher_, s->dist_cache_,
         &s->last_insert_len_, &s->commands_[s->num_commands_],
         &s->num_commands_, &s->num_literals_);
     if (BROTLI_IS_OOM(m)) return BROTLI_FALSE;
   } else {
     BrotliCreateBackwardReferences(bytes, wrapped_last_processed_pos,
-        data, mask, &s->params, s->hasher_, s->dist_cache_,
+        data, mask, literal_context_lut, &s->params,
+        &s->hasher_, s->dist_cache_,
         &s->last_insert_len_, &s->commands_[s->num_commands_],
         &s->num_commands_, &s->num_literals_);
   }
@@ -1072,7 +1113,7 @@ static BROTLI_BOOL EncodeData(
         s->num_commands_ < max_commands) {
       /* Merge with next input block. Everything will happen later. */
       if (UpdateLastProcessedPos(s)) {
-        HasherReset(s->hasher_);
+        HasherReset(&s->hasher_);
       }
       *out_size = 0;
       return BROTLI_TRUE;
@@ -1113,7 +1154,7 @@ static BROTLI_BOOL EncodeData(
     s->last_bytes_bits_ = storage_ix & 7u;
     s->last_flush_pos_ = s->input_pos_;
     if (UpdateLastProcessedPos(s)) {
-      HasherReset(s->hasher_);
+      HasherReset(&s->hasher_);
     }
     if (s->last_flush_pos_ > 0) {
       s->prev_byte_ = data[((uint32_t)s->last_flush_pos_ - 1) & mask];
@@ -1174,7 +1215,6 @@ static BROTLI_BOOL BrotliCompressBufferQuality10(
   size_t total_out_size = 0;
   uint16_t last_bytes;
   uint8_t last_bytes_bits;
-  HasherHandle hasher = NULL;
 
   const size_t hasher_eff_size = BROTLI_MIN(size_t,
       input_size, BROTLI_MAX_BACKWARD_LIMIT(lgwin) + BROTLI_WINDOW_GAP);
@@ -1190,6 +1230,9 @@ static BROTLI_BOOL BrotliCompressBufferQuality10(
   uint8_t prev_byte = 0;
   uint8_t prev_byte2 = 0;
 
+  Hasher hasher;
+  HasherInit(&hasher);
+
   BrotliEncoderInitParams(&params);
   params.quality = 10;
   params.lgwin = lgwin;
@@ -1226,6 +1269,7 @@ static BROTLI_BOOL BrotliCompressBufferQuality10(
 
     ContextType literal_context_mode = ChooseContextMode(&params,
         input_buffer, metablock_start, mask, metablock_end - metablock_start);
+    ContextLut literal_context_lut = BROTLI_CONTEXT_LUT(literal_context_mode);
 
     size_t block_start;
     for (block_start = metablock_start; block_start < metablock_end; ) {
@@ -1234,12 +1278,12 @@ static BROTLI_BOOL BrotliCompressBufferQuality10(
       ZopfliNode* nodes = BROTLI_ALLOC(m, ZopfliNode, block_size + 1);
       size_t path_size;
       size_t new_cmd_alloc_size;
-      if (BROTLI_IS_OOM(m)) goto oom;
+      if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(nodes)) goto oom;
       BrotliInitZopfliNodes(nodes, block_size + 1);
-      StitchToPreviousBlockH10(hasher, block_size, block_start,
+      StitchToPreviousBlockH10(&hasher.privat._H10, block_size, block_start,
                                input_buffer, mask);
       path_size = BrotliZopfliComputeShortestPath(m, block_size, block_start,
-          input_buffer, mask, &params, dist_cache, hasher,
+          input_buffer, mask, literal_context_lut, &params, dist_cache, &hasher,
           nodes);
       if (BROTLI_IS_OOM(m)) goto oom;
       /* We allocate a command buffer in the first iteration of this loop that
@@ -1254,7 +1298,7 @@ static BROTLI_BOOL BrotliCompressBufferQuality10(
                                       num_commands + path_size + 1);
       if (cmd_alloc_size != new_cmd_alloc_size) {
         Command* new_commands = BROTLI_ALLOC(m, Command, new_cmd_alloc_size);
-        if (BROTLI_IS_OOM(m)) goto oom;
+        if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(new_commands)) goto oom;
         cmd_alloc_size = new_cmd_alloc_size;
         if (commands) {
           memcpy(new_commands, commands, sizeof(Command) * num_commands);
@@ -1286,7 +1330,7 @@ static BROTLI_BOOL BrotliCompressBufferQuality10(
     if (metablock_size == 0) {
       /* Write the ISLAST and ISEMPTY bits. */
       storage = BROTLI_ALLOC(m, uint8_t, 16);
-      if (BROTLI_IS_OOM(m)) goto oom;
+      if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(storage)) goto oom;
       storage[0] = (uint8_t)last_bytes;
       storage[1] = (uint8_t)(last_bytes >> 8);
       BrotliWriteBits(2, 3, &storage_ix, storage);
@@ -1297,7 +1341,7 @@ static BROTLI_BOOL BrotliCompressBufferQuality10(
          CreateBackwardReferences is now unused. */
       memcpy(dist_cache, saved_dist_cache, 4 * sizeof(dist_cache[0]));
       storage = BROTLI_ALLOC(m, uint8_t, metablock_size + 16);
-      if (BROTLI_IS_OOM(m)) goto oom;
+      if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(storage)) goto oom;
       storage[0] = (uint8_t)last_bytes;
       storage[1] = (uint8_t)(last_bytes >> 8);
       BrotliStoreUncompressedMetaBlock(is_last, input_buffer,
@@ -1318,14 +1362,10 @@ static BROTLI_BOOL BrotliCompressBufferQuality10(
         /* The number of distance symbols effectively used for distance
            histograms. It might be less than distance alphabet size
            for "Large Window Brotli" (32-bit). */
-        uint32_t num_effective_dist_codes = block_params.dist.alphabet_size;
-        if (num_effective_dist_codes > BROTLI_NUM_HISTOGRAM_DISTANCE_SYMBOLS) {
-          num_effective_dist_codes = BROTLI_NUM_HISTOGRAM_DISTANCE_SYMBOLS;
-        }
-        BrotliOptimizeHistograms(num_effective_dist_codes, &mb);
+        BrotliOptimizeHistograms(block_params.dist.alphabet_size_limit, &mb);
       }
       storage = BROTLI_ALLOC(m, uint8_t, 2 * metablock_size + 503);
-      if (BROTLI_IS_OOM(m)) goto oom;
+      if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(storage)) goto oom;
       storage[0] = (uint8_t)last_bytes;
       storage[1] = (uint8_t)(last_bytes >> 8);
       BrotliStoreMetaBlock(m, input_buffer, metablock_start, metablock_size,
@@ -1576,7 +1616,10 @@ static BROTLI_BOOL BrotliEncoderCompressStreamFast(
           BROTLI_ALLOC(m, uint32_t, kCompressFragmentTwoPassBlockSize);
       s->literal_buf_ =
           BROTLI_ALLOC(m, uint8_t, kCompressFragmentTwoPassBlockSize);
-      if (BROTLI_IS_OOM(m)) return BROTLI_FALSE;
+      if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(s->command_buf_) ||
+          BROTLI_IS_NULL(s->literal_buf_)) {
+        return BROTLI_FALSE;
+      }
     }
     if (s->command_buf_) {
       command_buf = s->command_buf_;
@@ -1584,7 +1627,10 @@ static BROTLI_BOOL BrotliEncoderCompressStreamFast(
     } else {
       tmp_command_buf = BROTLI_ALLOC(m, uint32_t, buf_size);
       tmp_literal_buf = BROTLI_ALLOC(m, uint8_t, buf_size);
-      if (BROTLI_IS_OOM(m)) return BROTLI_FALSE;
+      if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(tmp_command_buf) ||
+          BROTLI_IS_NULL(tmp_literal_buf)) {
+        return BROTLI_FALSE;
+      }
       command_buf = tmp_command_buf;
       literal_buf = tmp_literal_buf;
     }
@@ -1640,8 +1686,10 @@ static BROTLI_BOOL BrotliEncoderCompressStreamFast(
             &storage_ix, storage);
         if (BROTLI_IS_OOM(m)) return BROTLI_FALSE;
       }
-      *next_in += block_size;
-      *available_in -= block_size;
+      if (block_size != 0) {
+        *next_in += block_size;
+        *available_in -= block_size;
+      }
       if (inplace) {
         size_t out_bytes = storage_ix >> 3;
         BROTLI_DCHECK(out_bytes <= *available_out);
@@ -1786,6 +1834,10 @@ BROTLI_BOOL BrotliEncoderCompressStream(
   }
   while (BROTLI_TRUE) {
     size_t remaining_block_size = RemainingInputBlockSize(s);
+    /* Shorten input to flint size. */
+    if (s->flint_ >= 0 && remaining_block_size > (size_t)s->flint_) {
+      remaining_block_size = (size_t)s->flint_;
+    }
 
     if (remaining_block_size != 0 && *available_in != 0) {
       size_t copy_input_size =
@@ -1793,10 +1845,18 @@ BROTLI_BOOL BrotliEncoderCompressStream(
       CopyInputToRingBuffer(s, copy_input_size, *next_in);
       *next_in += copy_input_size;
       *available_in -= copy_input_size;
+      if (s->flint_ > 0) s->flint_ = (int8_t)(s->flint_ - (int)copy_input_size);
       continue;
     }
 
     if (InjectFlushOrPushOutput(s, available_out, next_out, total_out)) {
+      /* Exit the "emit flint" workflow. */
+      if (s->flint_ == BROTLI_FLINT_WAITING_FOR_FLUSHING) {
+        CheckFlushComplete(s);
+        if (s->stream_state_ == BROTLI_STREAM_PROCESSING) {
+          s->flint_ = BROTLI_FLINT_DONE;
+        }
+      }
       continue;
     }
 
@@ -1810,6 +1870,11 @@ BROTLI_BOOL BrotliEncoderCompressStream(
         BROTLI_BOOL force_flush = TO_BROTLI_BOOL(
             (*available_in == 0) && op == BROTLI_OPERATION_FLUSH);
         BROTLI_BOOL result;
+        /* Force emitting (uncompressed) piece containing flint. */
+        if (!is_last && s->flint_ == 0) {
+          s->flint_ = BROTLI_FLINT_WAITING_FOR_FLUSHING;
+          force_flush = BROTLI_TRUE;
+        }
         UpdateSizeHint(s, *available_in);
         result = EncodeData(s, is_last, force_flush,
             &s->available_out_, &s->next_out_);
diff --git a/modules/brotli/enc/encoder_dict.c b/modules/brotli/enc/encoder_dict.c
index 8b2f6ad4a..c9e963b89 100644
--- a/modules/brotli/enc/encoder_dict.c
+++ b/modules/brotli/enc/encoder_dict.c
@@ -17,14 +17,15 @@ extern "C" {
 
 void BrotliInitEncoderDictionary(BrotliEncoderDictionary* dict) {
   dict->words = BrotliGetDictionary();
+  dict->num_transforms = (uint32_t)BrotliGetTransforms()->num_transforms;
 
-  dict->hash_table = kStaticDictionaryHash;
+  dict->hash_table_words = kStaticDictionaryHashWords;
+  dict->hash_table_lengths = kStaticDictionaryHashLengths;
   dict->buckets = kStaticDictionaryBuckets;
   dict->dict_words = kStaticDictionaryWords;
 
   dict->cutoffTransformsCount = kCutoffTransformsCount;
   dict->cutoffTransforms = kCutoffTransforms;
-
 }
 
 #if defined(__cplusplus) || defined(c_plusplus)
diff --git a/modules/brotli/enc/encoder_dict.h b/modules/brotli/enc/encoder_dict.h
index 3cb6b0ac1..a1c329fbf 100644
--- a/modules/brotli/enc/encoder_dict.h
+++ b/modules/brotli/enc/encoder_dict.h
@@ -19,13 +19,15 @@ extern "C" {
 /* Dictionary data (words and transforms) for 1 possible context */
 typedef struct BrotliEncoderDictionary {
   const BrotliDictionary* words;
+  uint32_t num_transforms;
 
   /* cut off for fast encoder */
   uint32_t cutoffTransformsCount;
   uint64_t cutoffTransforms;
 
   /* from dictionary_hash.h, for fast encoder */
-  const uint16_t* hash_table;
+  const uint16_t* hash_table_words;
+  const uint8_t* hash_table_lengths;
 
   /* from static_dict_lut.h, for slow encoder */
   const uint16_t* buckets;
diff --git a/modules/brotli/enc/entropy_encode.c b/modules/brotli/enc/entropy_encode.c
index 97f9dfb82..b50ccb5d1 100644
--- a/modules/brotli/enc/entropy_encode.c
+++ b/modules/brotli/enc/entropy_encode.c
@@ -18,6 +18,8 @@
 extern "C" {
 #endif
 
+const size_t kBrotliShellGaps[] = {132, 57, 23, 10, 4, 1};
+
 BROTLI_BOOL BrotliSetDepth(
     int p0, HuffmanTree* pool, uint8_t* depth, int max_depth) {
   int stack[16];
diff --git a/modules/brotli/enc/entropy_encode.h b/modules/brotli/enc/entropy_encode.h
index f23d9c379..9618e1d35 100644
--- a/modules/brotli/enc/entropy_encode.h
+++ b/modules/brotli/enc/entropy_encode.h
@@ -76,12 +76,12 @@ BROTLI_INTERNAL void BrotliConvertBitDepthsToSymbols(const uint8_t* depth,
                                                      size_t len,
                                                      uint16_t* bits);
 
+BROTLI_INTERNAL extern const size_t kBrotliShellGaps[6];
 /* Input size optimized Shell sort. */
 typedef BROTLI_BOOL (*HuffmanTreeComparator)(
     const HuffmanTree*, const HuffmanTree*);
 static BROTLI_INLINE void SortHuffmanTreeItems(HuffmanTree* items,
     const size_t n, HuffmanTreeComparator comparator) {
-  static const size_t gaps[] = {132, 57, 23, 10, 4, 1};
   if (n < 13) {
     /* Insertion sort. */
     size_t i;
@@ -101,7 +101,7 @@ static BROTLI_INLINE void SortHuffmanTreeItems(HuffmanTree* items,
     /* Shell sort. */
     int g = n < 57 ? 2 : 0;
     for (; g < 6; ++g) {
-      size_t gap = gaps[g];
+      size_t gap = kBrotliShellGaps[g];
       size_t i;
       for (i = gap; i < n; ++i) {
         size_t j = i;
diff --git a/modules/brotli/enc/fast_log.c b/modules/brotli/enc/fast_log.c
new file mode 100644
index 000000000..2319baeb7
--- /dev/null
+++ b/modules/brotli/enc/fast_log.c
@@ -0,0 +1,105 @@
+/* Copyright 2013 Google Inc. All Rights Reserved.
+
+   Distributed under MIT license.
+   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
+*/
+
+#include "./fast_log.h"
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+/* ", ".join(["%.16ff" % x for x in [0.0]+[log2(x) for x in range(1, 256)]]) */
+const double kBrotliLog2Table[BROTLI_LOG2_TABLE_SIZE] = {
+  0.0000000000000000f, 0.0000000000000000f, 1.0000000000000000f,
+  1.5849625007211563f, 2.0000000000000000f, 2.3219280948873622f,
+  2.5849625007211561f, 2.8073549220576042f, 3.0000000000000000f,
+  3.1699250014423126f, 3.3219280948873626f, 3.4594316186372978f,
+  3.5849625007211565f, 3.7004397181410922f, 3.8073549220576037f,
+  3.9068905956085187f, 4.0000000000000000f, 4.0874628412503400f,
+  4.1699250014423122f, 4.2479275134435852f, 4.3219280948873626f,
+  4.3923174227787607f, 4.4594316186372973f, 4.5235619560570131f,
+  4.5849625007211570f, 4.6438561897747244f, 4.7004397181410926f,
+  4.7548875021634691f, 4.8073549220576037f, 4.8579809951275728f,
+  4.9068905956085187f, 4.9541963103868758f, 5.0000000000000000f,
+  5.0443941193584534f, 5.0874628412503400f, 5.1292830169449664f,
+  5.1699250014423122f, 5.2094533656289501f, 5.2479275134435852f,
+  5.2854022188622487f, 5.3219280948873626f, 5.3575520046180838f,
+  5.3923174227787607f, 5.4262647547020979f, 5.4594316186372973f,
+  5.4918530963296748f, 5.5235619560570131f, 5.5545888516776376f,
+  5.5849625007211570f, 5.6147098441152083f, 5.6438561897747244f,
+  5.6724253419714961f, 5.7004397181410926f, 5.7279204545631996f,
+  5.7548875021634691f, 5.7813597135246599f, 5.8073549220576046f,
+  5.8328900141647422f, 5.8579809951275719f, 5.8826430493618416f,
+  5.9068905956085187f, 5.9307373375628867f, 5.9541963103868758f,
+  5.9772799234999168f, 6.0000000000000000f, 6.0223678130284544f,
+  6.0443941193584534f, 6.0660891904577721f, 6.0874628412503400f,
+  6.1085244567781700f, 6.1292830169449672f, 6.1497471195046822f,
+  6.1699250014423122f, 6.1898245588800176f, 6.2094533656289510f,
+  6.2288186904958804f, 6.2479275134435861f, 6.2667865406949019f,
+  6.2854022188622487f, 6.3037807481771031f, 6.3219280948873617f,
+  6.3398500028846252f, 6.3575520046180847f, 6.3750394313469254f,
+  6.3923174227787598f, 6.4093909361377026f, 6.4262647547020979f,
+  6.4429434958487288f, 6.4594316186372982f, 6.4757334309663976f,
+  6.4918530963296748f, 6.5077946401986964f, 6.5235619560570131f,
+  6.5391588111080319f, 6.5545888516776376f, 6.5698556083309478f,
+  6.5849625007211561f, 6.5999128421871278f, 6.6147098441152092f,
+  6.6293566200796095f, 6.6438561897747253f, 6.6582114827517955f,
+  6.6724253419714952f, 6.6865005271832185f, 6.7004397181410917f,
+  6.7142455176661224f, 6.7279204545631988f, 6.7414669864011465f,
+  6.7548875021634691f, 6.7681843247769260f, 6.7813597135246599f,
+  6.7944158663501062f, 6.8073549220576037f, 6.8201789624151887f,
+  6.8328900141647422f, 6.8454900509443757f, 6.8579809951275719f,
+  6.8703647195834048f, 6.8826430493618416f, 6.8948177633079437f,
+  6.9068905956085187f, 6.9188632372745955f, 6.9307373375628867f,
+  6.9425145053392399f, 6.9541963103868758f, 6.9657842846620879f,
+  6.9772799234999168f, 6.9886846867721664f, 7.0000000000000000f,
+  7.0112272554232540f, 7.0223678130284544f, 7.0334230015374501f,
+  7.0443941193584534f, 7.0552824355011898f, 7.0660891904577721f,
+  7.0768155970508317f, 7.0874628412503400f, 7.0980320829605272f,
+  7.1085244567781700f, 7.1189410727235076f, 7.1292830169449664f,
+  7.1395513523987937f, 7.1497471195046822f, 7.1598713367783891f,
+  7.1699250014423130f, 7.1799090900149345f, 7.1898245588800176f,
+  7.1996723448363644f, 7.2094533656289492f, 7.2191685204621621f,
+  7.2288186904958804f, 7.2384047393250794f, 7.2479275134435861f,
+  7.2573878426926521f, 7.2667865406949019f, 7.2761244052742384f,
+  7.2854022188622487f, 7.2946207488916270f, 7.3037807481771031f,
+  7.3128829552843557f, 7.3219280948873617f, 7.3309168781146177f,
+  7.3398500028846243f, 7.3487281542310781f, 7.3575520046180847f,
+  7.3663222142458151f, 7.3750394313469254f, 7.3837042924740528f,
+  7.3923174227787607f, 7.4008794362821844f, 7.4093909361377026f,
+  7.4178525148858991f, 7.4262647547020979f, 7.4346282276367255f,
+  7.4429434958487288f, 7.4512111118323299f, 7.4594316186372973f,
+  7.4676055500829976f, 7.4757334309663976f, 7.4838157772642564f,
+  7.4918530963296748f, 7.4998458870832057f, 7.5077946401986964f,
+  7.5156998382840436f, 7.5235619560570131f, 7.5313814605163119f,
+  7.5391588111080319f, 7.5468944598876373f, 7.5545888516776376f,
+  7.5622424242210728f, 7.5698556083309478f, 7.5774288280357487f,
+  7.5849625007211561f, 7.5924570372680806f, 7.5999128421871278f,
+  7.6073303137496113f, 7.6147098441152075f, 7.6220518194563764f,
+  7.6293566200796095f, 7.6366246205436488f, 7.6438561897747244f,
+  7.6510516911789290f, 7.6582114827517955f, 7.6653359171851765f,
+  7.6724253419714952f, 7.6794800995054464f, 7.6865005271832185f,
+  7.6934869574993252f, 7.7004397181410926f, 7.7073591320808825f,
+  7.7142455176661224f, 7.7210991887071856f, 7.7279204545631996f,
+  7.7347096202258392f, 7.7414669864011465f, 7.7481928495894596f,
+  7.7548875021634691f, 7.7615512324444795f, 7.7681843247769260f,
+  7.7747870596011737f, 7.7813597135246608f, 7.7879025593914317f,
+  7.7944158663501062f, 7.8008998999203047f, 7.8073549220576037f,
+  7.8137811912170374f, 7.8201789624151887f, 7.8265484872909159f,
+  7.8328900141647422f, 7.8392037880969445f, 7.8454900509443757f,
+  7.8517490414160571f, 7.8579809951275719f, 7.8641861446542798f,
+  7.8703647195834048f, 7.8765169465650002f, 7.8826430493618425f,
+  7.8887432488982601f, 7.8948177633079446f, 7.9008668079807496f,
+  7.9068905956085187f, 7.9128893362299619f, 7.9188632372745955f,
+  7.9248125036057813f, 7.9307373375628867f, 7.9366379390025719f,
+  7.9425145053392399f, 7.9483672315846778f, 7.9541963103868758f,
+  7.9600019320680806f, 7.9657842846620870f, 7.9715435539507720f,
+  7.9772799234999168f, 7.9829935746943104f, 7.9886846867721664f,
+  7.9943534368588578f
+};
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}  /* extern "C" */
+#endif
diff --git a/modules/brotli/enc/fast_log.h b/modules/brotli/enc/fast_log.h
index cade1235a..2094f13e5 100644
--- a/modules/brotli/enc/fast_log.h
+++ b/modules/brotli/enc/fast_log.h
@@ -19,10 +19,8 @@ extern "C" {
 #endif
 
 static BROTLI_INLINE uint32_t Log2FloorNonZero(size_t n) {
-  /* TODO: generalize and move to platform.h */
-#if BROTLI_GNUC_HAS_BUILTIN(__builtin_clz, 3, 4, 0) || \
-    BROTLI_INTEL_VERSION_CHECK(16, 0, 0)
-  return 31u ^ (uint32_t)__builtin_clz((uint32_t)n);
+#if defined(BROTLI_BSR32)
+  return BROTLI_BSR32((uint32_t)n);
 #else
   uint32_t result = 0;
   while (n >>= 1) result++;
@@ -30,110 +28,31 @@ static BROTLI_INLINE uint32_t Log2FloorNonZero(size_t n) {
 #endif
 }
 
+#define BROTLI_LOG2_TABLE_SIZE 256
+
 /* A lookup table for small values of log2(int) to be used in entropy
-   computation.
+   computation. */
+BROTLI_INTERNAL extern const double kBrotliLog2Table[BROTLI_LOG2_TABLE_SIZE];
 
-   ", ".join(["%.16ff" % x for x in [0.0]+[log2(x) for x in range(1, 256)]]) */
-static const float kLog2Table[] = {
-  0.0000000000000000f, 0.0000000000000000f, 1.0000000000000000f,
-  1.5849625007211563f, 2.0000000000000000f, 2.3219280948873622f,
-  2.5849625007211561f, 2.8073549220576042f, 3.0000000000000000f,
-  3.1699250014423126f, 3.3219280948873626f, 3.4594316186372978f,
-  3.5849625007211565f, 3.7004397181410922f, 3.8073549220576037f,
-  3.9068905956085187f, 4.0000000000000000f, 4.0874628412503400f,
-  4.1699250014423122f, 4.2479275134435852f, 4.3219280948873626f,
-  4.3923174227787607f, 4.4594316186372973f, 4.5235619560570131f,
-  4.5849625007211570f, 4.6438561897747244f, 4.7004397181410926f,
-  4.7548875021634691f, 4.8073549220576037f, 4.8579809951275728f,
-  4.9068905956085187f, 4.9541963103868758f, 5.0000000000000000f,
-  5.0443941193584534f, 5.0874628412503400f, 5.1292830169449664f,
-  5.1699250014423122f, 5.2094533656289501f, 5.2479275134435852f,
-  5.2854022188622487f, 5.3219280948873626f, 5.3575520046180838f,
-  5.3923174227787607f, 5.4262647547020979f, 5.4594316186372973f,
-  5.4918530963296748f, 5.5235619560570131f, 5.5545888516776376f,
-  5.5849625007211570f, 5.6147098441152083f, 5.6438561897747244f,
-  5.6724253419714961f, 5.7004397181410926f, 5.7279204545631996f,
-  5.7548875021634691f, 5.7813597135246599f, 5.8073549220576046f,
-  5.8328900141647422f, 5.8579809951275719f, 5.8826430493618416f,
-  5.9068905956085187f, 5.9307373375628867f, 5.9541963103868758f,
-  5.9772799234999168f, 6.0000000000000000f, 6.0223678130284544f,
-  6.0443941193584534f, 6.0660891904577721f, 6.0874628412503400f,
-  6.1085244567781700f, 6.1292830169449672f, 6.1497471195046822f,
-  6.1699250014423122f, 6.1898245588800176f, 6.2094533656289510f,
-  6.2288186904958804f, 6.2479275134435861f, 6.2667865406949019f,
-  6.2854022188622487f, 6.3037807481771031f, 6.3219280948873617f,
-  6.3398500028846252f, 6.3575520046180847f, 6.3750394313469254f,
-  6.3923174227787598f, 6.4093909361377026f, 6.4262647547020979f,
-  6.4429434958487288f, 6.4594316186372982f, 6.4757334309663976f,
-  6.4918530963296748f, 6.5077946401986964f, 6.5235619560570131f,
-  6.5391588111080319f, 6.5545888516776376f, 6.5698556083309478f,
-  6.5849625007211561f, 6.5999128421871278f, 6.6147098441152092f,
-  6.6293566200796095f, 6.6438561897747253f, 6.6582114827517955f,
-  6.6724253419714952f, 6.6865005271832185f, 6.7004397181410917f,
-  6.7142455176661224f, 6.7279204545631988f, 6.7414669864011465f,
-  6.7548875021634691f, 6.7681843247769260f, 6.7813597135246599f,
-  6.7944158663501062f, 6.8073549220576037f, 6.8201789624151887f,
-  6.8328900141647422f, 6.8454900509443757f, 6.8579809951275719f,
-  6.8703647195834048f, 6.8826430493618416f, 6.8948177633079437f,
-  6.9068905956085187f, 6.9188632372745955f, 6.9307373375628867f,
-  6.9425145053392399f, 6.9541963103868758f, 6.9657842846620879f,
-  6.9772799234999168f, 6.9886846867721664f, 7.0000000000000000f,
-  7.0112272554232540f, 7.0223678130284544f, 7.0334230015374501f,
-  7.0443941193584534f, 7.0552824355011898f, 7.0660891904577721f,
-  7.0768155970508317f, 7.0874628412503400f, 7.0980320829605272f,
-  7.1085244567781700f, 7.1189410727235076f, 7.1292830169449664f,
-  7.1395513523987937f, 7.1497471195046822f, 7.1598713367783891f,
-  7.1699250014423130f, 7.1799090900149345f, 7.1898245588800176f,
-  7.1996723448363644f, 7.2094533656289492f, 7.2191685204621621f,
-  7.2288186904958804f, 7.2384047393250794f, 7.2479275134435861f,
-  7.2573878426926521f, 7.2667865406949019f, 7.2761244052742384f,
-  7.2854022188622487f, 7.2946207488916270f, 7.3037807481771031f,
-  7.3128829552843557f, 7.3219280948873617f, 7.3309168781146177f,
-  7.3398500028846243f, 7.3487281542310781f, 7.3575520046180847f,
-  7.3663222142458151f, 7.3750394313469254f, 7.3837042924740528f,
-  7.3923174227787607f, 7.4008794362821844f, 7.4093909361377026f,
-  7.4178525148858991f, 7.4262647547020979f, 7.4346282276367255f,
-  7.4429434958487288f, 7.4512111118323299f, 7.4594316186372973f,
-  7.4676055500829976f, 7.4757334309663976f, 7.4838157772642564f,
-  7.4918530963296748f, 7.4998458870832057f, 7.5077946401986964f,
-  7.5156998382840436f, 7.5235619560570131f, 7.5313814605163119f,
-  7.5391588111080319f, 7.5468944598876373f, 7.5545888516776376f,
-  7.5622424242210728f, 7.5698556083309478f, 7.5774288280357487f,
-  7.5849625007211561f, 7.5924570372680806f, 7.5999128421871278f,
-  7.6073303137496113f, 7.6147098441152075f, 7.6220518194563764f,
-  7.6293566200796095f, 7.6366246205436488f, 7.6438561897747244f,
-  7.6510516911789290f, 7.6582114827517955f, 7.6653359171851765f,
-  7.6724253419714952f, 7.6794800995054464f, 7.6865005271832185f,
-  7.6934869574993252f, 7.7004397181410926f, 7.7073591320808825f,
-  7.7142455176661224f, 7.7210991887071856f, 7.7279204545631996f,
-  7.7347096202258392f, 7.7414669864011465f, 7.7481928495894596f,
-  7.7548875021634691f, 7.7615512324444795f, 7.7681843247769260f,
-  7.7747870596011737f, 7.7813597135246608f, 7.7879025593914317f,
-  7.7944158663501062f, 7.8008998999203047f, 7.8073549220576037f,
-  7.8137811912170374f, 7.8201789624151887f, 7.8265484872909159f,
-  7.8328900141647422f, 7.8392037880969445f, 7.8454900509443757f,
-  7.8517490414160571f, 7.8579809951275719f, 7.8641861446542798f,
-  7.8703647195834048f, 7.8765169465650002f, 7.8826430493618425f,
-  7.8887432488982601f, 7.8948177633079446f, 7.9008668079807496f,
-  7.9068905956085187f, 7.9128893362299619f, 7.9188632372745955f,
-  7.9248125036057813f, 7.9307373375628867f, 7.9366379390025719f,
-  7.9425145053392399f, 7.9483672315846778f, 7.9541963103868758f,
-  7.9600019320680806f, 7.9657842846620870f, 7.9715435539507720f,
-  7.9772799234999168f, 7.9829935746943104f, 7.9886846867721664f,
-  7.9943534368588578f
-};
+/* Visual Studio 2012 and Android API levels < 18 do not have the log2()
+ * function defined, so we use log() and a multiplication instead. */
+#if !defined(BROTLI_HAVE_LOG2)
+#if ((defined(_MSC_VER) && _MSC_VER <= 1700) || \
+     (defined(__ANDROID_API__) && __ANDROID_API__ < 18))
+#define BROTLI_HAVE_LOG2 0
+#else
+#define BROTLI_HAVE_LOG2 1
+#endif
+#endif
 
 #define LOG_2_INV 1.4426950408889634
 
 /* Faster logarithm for small integers, with the property of log2(0) == 0. */
 static BROTLI_INLINE double FastLog2(size_t v) {
-  if (v < sizeof(kLog2Table) / sizeof(kLog2Table[0])) {
-    return kLog2Table[v];
+  if (v < BROTLI_LOG2_TABLE_SIZE) {
+    return kBrotliLog2Table[v];
   }
-#if (defined(_MSC_VER) && _MSC_VER <= 1700) || \
-    (defined(__ANDROID_API__) && __ANDROID_API__ < 18)
-  /* Visual Studio 2012 and Android API levels < 18 do not have the log2()
-   * function defined, so we use log() and a multiplication instead. */
+#if !(BROTLI_HAVE_LOG2)
   return log((double)v) * LOG_2_INV;
 #else
   return log2((double)v);
diff --git a/modules/brotli/enc/find_match_length.h b/modules/brotli/enc/find_match_length.h
index bc428cffd..f8853a70f 100644
--- a/modules/brotli/enc/find_match_length.h
+++ b/modules/brotli/enc/find_match_length.h
@@ -17,8 +17,7 @@ extern "C" {
 #endif
 
 /* Separate implementation for little-endian 64-bit targets, for speed. */
-#if defined(__GNUC__) && defined(_LP64) && defined(BROTLI_LITTLE_ENDIAN)
-
+#if defined(BROTLI_TZCNT64) && BROTLI_64_BITS && BROTLI_LITTLE_ENDIAN
 static BROTLI_INLINE size_t FindMatchLengthWithLimit(const uint8_t* s1,
                                                      const uint8_t* s2,
                                                      size_t limit) {
@@ -32,7 +31,7 @@ static BROTLI_INLINE size_t FindMatchLengthWithLimit(const uint8_t* s1,
     } else {
       uint64_t x = BROTLI_UNALIGNED_LOAD64LE(s2) ^
           BROTLI_UNALIGNED_LOAD64LE(s1 + matched);
-      size_t matching_bits = (size_t)__builtin_ctzll(x);
+      size_t matching_bits = (size_t)BROTLI_TZCNT64(x);
       matched += matching_bits >> 3;
       return matched;
     }
diff --git a/modules/brotli/enc/hash.h b/modules/brotli/enc/hash.h
index 8c5a7bb5a..6362f69b9 100644
--- a/modules/brotli/enc/hash.h
+++ b/modules/brotli/enc/hash.h
@@ -27,34 +27,19 @@
 extern "C" {
 #endif
 
-/* Pointer to hasher data.
- *
- * Excluding initialization and destruction, hasher can be passed as
- * HasherHandle by value.
- *
- * Typically hasher data consists of 3 sections:
- * * HasherCommon structure
- * * private structured hasher data, depending on hasher type
- * * private dynamic hasher data, depending on hasher type and parameters
- *
- * Using "define" instead of "typedef", because on MSVC __restrict does not work
- * on typedef pointer types. */
-#define HasherHandle uint8_t*
-
 typedef struct {
+  /* Dynamically allocated area; first member for quickest access. */
+  void* extra;
+
+  size_t dict_num_lookups;
+  size_t dict_num_matches;
+
   BrotliHasherParams params;
 
   /* False if hasher needs to be "prepared" before use. */
   BROTLI_BOOL is_prepared_;
-
-  size_t dict_num_lookups;
-  size_t dict_num_matches;
 } HasherCommon;
 
-static BROTLI_INLINE HasherCommon* GetHasherCommon(HasherHandle handle) {
-  return (HasherCommon*)handle;
-}
-
 #define score_t size_t
 
 static const uint32_t kCutoffTransformsCount = 10;
@@ -149,17 +134,13 @@ static BROTLI_INLINE score_t BackwardReferencePenaltyUsingLastDistance(
 }
 
 static BROTLI_INLINE BROTLI_BOOL TestStaticDictionaryItem(
-    const BrotliEncoderDictionary* dictionary, size_t item,
+    const BrotliEncoderDictionary* dictionary, size_t len, size_t word_idx,
     const uint8_t* data, size_t max_length, size_t max_backward,
     size_t max_distance, HasherSearchResult* out) {
-  size_t len;
-  size_t word_idx;
   size_t offset;
   size_t matchlen;
   size_t backward;
   score_t score;
-  len = item & 0x1F;
-  word_idx = item >> 5;
   offset = dictionary->words->offsets_by_length[len] + len * word_idx;
   if (len > max_length) {
     return BROTLI_FALSE;
@@ -193,25 +174,24 @@ static BROTLI_INLINE BROTLI_BOOL TestStaticDictionaryItem(
 
 static BROTLI_INLINE void SearchInStaticDictionary(
     const BrotliEncoderDictionary* dictionary,
-    HasherHandle handle, const uint8_t* data, size_t max_length,
+    HasherCommon* common, const uint8_t* data, size_t max_length,
     size_t max_backward, size_t max_distance,
     HasherSearchResult* out, BROTLI_BOOL shallow) {
   size_t key;
   size_t i;
-  HasherCommon* self = GetHasherCommon(handle);
-  if (self->dict_num_matches < (self->dict_num_lookups >> 7)) {
+  if (common->dict_num_matches < (common->dict_num_lookups >> 7)) {
     return;
   }
   key = Hash14(data) << 1;
   for (i = 0; i < (shallow ? 1u : 2u); ++i, ++key) {
-    size_t item = dictionary->hash_table[key];
-    self->dict_num_lookups++;
-    if (item != 0) {
+    common->dict_num_lookups++;
+    if (dictionary->hash_table_lengths[key] != 0) {
       BROTLI_BOOL item_matches = TestStaticDictionaryItem(
-          dictionary, item, data,
+          dictionary, dictionary->hash_table_lengths[key],
+          dictionary->hash_table_words[key], data,
           max_length, max_backward, max_distance, out);
       if (item_matches) {
-        self->dict_num_matches++;
+        common->dict_num_matches++;
       }
     }
   }
@@ -260,37 +240,37 @@ static BROTLI_INLINE size_t BackwardMatchLengthCode(const BackwardMatch* self) {
 /* MAX_NUM_MATCHES == 64 + MAX_TREE_SEARCH_DEPTH */
 #define MAX_NUM_MATCHES_H10 128
 
-/* For BUCKET_SWEEP == 1, enabling the dictionary lookup makes compression
+/* For BUCKET_SWEEP_BITS == 0, enabling the dictionary lookup makes compression
    a little faster (0.5% - 1%) and it compresses 0.15% better on small text
    and HTML inputs. */
 
 #define HASHER() H2
 #define BUCKET_BITS 16
-#define BUCKET_SWEEP 1
+#define BUCKET_SWEEP_BITS 0
 #define HASH_LEN 5
 #define USE_DICTIONARY 1
 #include "./hash_longest_match_quickly_inc.h"  /* NOLINT(build/include) */
-#undef BUCKET_SWEEP
+#undef BUCKET_SWEEP_BITS
 #undef USE_DICTIONARY
 #undef HASHER
 
 #define HASHER() H3
-#define BUCKET_SWEEP 2
+#define BUCKET_SWEEP_BITS 1
 #define USE_DICTIONARY 0
 #include "./hash_longest_match_quickly_inc.h"  /* NOLINT(build/include) */
 #undef USE_DICTIONARY
-#undef BUCKET_SWEEP
+#undef BUCKET_SWEEP_BITS
 #undef BUCKET_BITS
 #undef HASHER
 
 #define HASHER() H4
 #define BUCKET_BITS 17
-#define BUCKET_SWEEP 4
+#define BUCKET_SWEEP_BITS 2
 #define USE_DICTIONARY 1
 #include "./hash_longest_match_quickly_inc.h"  /* NOLINT(build/include) */
 #undef USE_DICTIONARY
 #undef HASH_LEN
-#undef BUCKET_SWEEP
+#undef BUCKET_SWEEP_BITS
 #undef BUCKET_BITS
 #undef HASHER
 
@@ -334,13 +314,13 @@ static BROTLI_INLINE size_t BackwardMatchLengthCode(const BackwardMatch* self) {
 
 #define HASHER() H54
 #define BUCKET_BITS 20
-#define BUCKET_SWEEP 4
+#define BUCKET_SWEEP_BITS 2
 #define HASH_LEN 7
 #define USE_DICTIONARY 0
 #include "./hash_longest_match_quickly_inc.h"  /* NOLINT(build/include) */
 #undef USE_DICTIONARY
 #undef HASH_LEN
-#undef BUCKET_SWEEP
+#undef BUCKET_SWEEP_BITS
 #undef BUCKET_BITS
 #undef HASHER
 
@@ -393,97 +373,107 @@ static BROTLI_INLINE size_t BackwardMatchLengthCode(const BackwardMatch* self) {
 #undef CAT
 #undef EXPAND_CAT
 
-#define FOR_GENERIC_HASHERS(H) H(2) H(3) H(4) H(5) H(6) H(40) H(41) H(42) H(54)\
-                               H(35) H(55) H(65)
+#define FOR_SIMPLE_HASHERS(H) H(2) H(3) H(4) H(5) H(6) H(40) H(41) H(42) H(54)
+#define FOR_COMPOSITE_HASHERS(H) H(35) H(55) H(65)
+#define FOR_GENERIC_HASHERS(H) FOR_SIMPLE_HASHERS(H) FOR_COMPOSITE_HASHERS(H)
 #define FOR_ALL_HASHERS(H) FOR_GENERIC_HASHERS(H) H(10)
 
-static BROTLI_INLINE void DestroyHasher(
-    MemoryManager* m, HasherHandle* handle) {
-  if (*handle == NULL) return;
-  BROTLI_FREE(m, *handle);
+typedef struct {
+  HasherCommon common;
+
+  union {
+#define MEMBER_(N) \
+    H ## N _H ## N;
+    FOR_ALL_HASHERS(MEMBER_)
+#undef MEMBER_
+  } privat;
+} Hasher;
+
+/* MUST be invoked before any other method. */
+static BROTLI_INLINE void HasherInit(Hasher* hasher) {
+  hasher->common.extra = NULL;
 }
 
-static BROTLI_INLINE void HasherReset(HasherHandle handle) {
-  if (handle == NULL) return;
-  GetHasherCommon(handle)->is_prepared_ = BROTLI_FALSE;
+static BROTLI_INLINE void DestroyHasher(MemoryManager* m, Hasher* hasher) {
+  if (hasher->common.extra == NULL) return;
+  BROTLI_FREE(m, hasher->common.extra);
+}
+
+static BROTLI_INLINE void HasherReset(Hasher* hasher) {
+  hasher->common.is_prepared_ = BROTLI_FALSE;
 }
 
 static BROTLI_INLINE size_t HasherSize(const BrotliEncoderParams* params,
     BROTLI_BOOL one_shot, const size_t input_size) {
-  size_t result = sizeof(HasherCommon);
   switch (params->hasher.type) {
-#define SIZE_(N)                                                         \
-    case N:                                                              \
-      result += HashMemAllocInBytesH ## N(params, one_shot, input_size); \
-      break;
+#define SIZE_(N)                                                      \
+    case N:                                                           \
+      return HashMemAllocInBytesH ## N(params, one_shot, input_size);
     FOR_ALL_HASHERS(SIZE_)
 #undef SIZE_
     default:
       break;
   }
-  return result;
+  return 0;  /* Default case. */
 }
 
-static BROTLI_INLINE void HasherSetup(MemoryManager* m, HasherHandle* handle,
+static BROTLI_INLINE void HasherSetup(MemoryManager* m, Hasher* hasher,
     BrotliEncoderParams* params, const uint8_t* data, size_t position,
     size_t input_size, BROTLI_BOOL is_last) {
-  HasherHandle self = NULL;
-  HasherCommon* common = NULL;
   BROTLI_BOOL one_shot = (position == 0 && is_last);
-  if (*handle == NULL) {
+  if (hasher->common.extra == NULL) {
     size_t alloc_size;
     ChooseHasher(params, &params->hasher);
     alloc_size = HasherSize(params, one_shot, input_size);
-    self = BROTLI_ALLOC(m, uint8_t, alloc_size);
-    if (BROTLI_IS_OOM(m)) return;
-    *handle = self;
-    common = GetHasherCommon(self);
-    common->params = params->hasher;
-    switch (common->params.type) {
-#define INITIALIZE_(N)                     \
-      case N:                              \
-        InitializeH ## N(*handle, params); \
+    hasher->common.extra = BROTLI_ALLOC(m, uint8_t, alloc_size);
+    if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(hasher->common.extra)) return;
+    hasher->common.params = params->hasher;
+    switch (hasher->common.params.type) {
+#define INITIALIZE_(N)                        \
+      case N:                                 \
+        InitializeH ## N(&hasher->common,     \
+            &hasher->privat._H ## N, params); \
         break;
       FOR_ALL_HASHERS(INITIALIZE_);
 #undef INITIALIZE_
       default:
         break;
     }
-    HasherReset(*handle);
+    HasherReset(hasher);
   }
 
-  self = *handle;
-  common = GetHasherCommon(self);
-  if (!common->is_prepared_) {
-    switch (common->params.type) {
-#define PREPARE_(N)                                      \
-      case N:                                            \
-        PrepareH ## N(self, one_shot, input_size, data); \
+  if (!hasher->common.is_prepared_) {
+    switch (hasher->common.params.type) {
+#define PREPARE_(N)                      \
+      case N:                            \
+        PrepareH ## N(                   \
+            &hasher->privat._H ## N,     \
+            one_shot, input_size, data); \
         break;
       FOR_ALL_HASHERS(PREPARE_)
 #undef PREPARE_
       default: break;
     }
     if (position == 0) {
-        common->dict_num_lookups = 0;
-        common->dict_num_matches = 0;
+      hasher->common.dict_num_lookups = 0;
+      hasher->common.dict_num_matches = 0;
     }
-    common->is_prepared_ = BROTLI_TRUE;
+    hasher->common.is_prepared_ = BROTLI_TRUE;
   }
 }
 
 static BROTLI_INLINE void InitOrStitchToPreviousBlock(
-    MemoryManager* m, HasherHandle* handle, const uint8_t* data, size_t mask,
+    MemoryManager* m, Hasher* hasher, const uint8_t* data, size_t mask,
     BrotliEncoderParams* params, size_t position, size_t input_size,
     BROTLI_BOOL is_last) {
-  HasherHandle self;
-  HasherSetup(m, handle, params, data, position, input_size, is_last);
+  HasherSetup(m, hasher, params, data, position, input_size, is_last);
   if (BROTLI_IS_OOM(m)) return;
-  self = *handle;
-  switch (GetHasherCommon(self)->params.type) {
-#define INIT_(N)                                                           \
-    case N:                                                                \
-      StitchToPreviousBlockH ## N(self, input_size, position, data, mask); \
+  switch (hasher->common.params.type) {
+#define INIT_(N)                             \
+    case N:                                  \
+      StitchToPreviousBlockH ## N(           \
+          &hasher->privat._H ## N,           \
+          input_size, position, data, mask); \
     break;
     FOR_ALL_HASHERS(INIT_)
 #undef INIT_
diff --git a/modules/brotli/enc/hash_composite_inc.h b/modules/brotli/enc/hash_composite_inc.h
index b266aa2f8..cba156c0e 100644
--- a/modules/brotli/enc/hash_composite_inc.h
+++ b/modules/brotli/enc/hash_composite_inc.h
@@ -28,20 +28,25 @@ static BROTLI_INLINE size_t FN(StoreLookahead)(void) {
 }
 
 typedef struct HashComposite {
-  HasherHandle ha;
-  HasherHandle hb;
+  HASHER_A ha;
+  HASHER_B hb;
+  HasherCommon hb_common;
+
+  /* Shortcuts. */
+  void* extra;
+  HasherCommon* common;
+
+  BROTLI_BOOL fresh;
   const BrotliEncoderParams* params;
 } HashComposite;
 
-static BROTLI_INLINE HashComposite* FN(Self)(HasherHandle handle) {
-  return (HashComposite*)&(GetHasherCommon(handle)[1]);
-}
+static void FN(Initialize)(HasherCommon* common,
+    HashComposite* BROTLI_RESTRICT self, const BrotliEncoderParams* params) {
+  self->common = common;
+  self->extra = common->extra;
 
-static void FN(Initialize)(
-    HasherHandle handle, const BrotliEncoderParams* params) {
-  HashComposite* self = FN(Self)(handle);
-  self->ha = 0;
-  self->hb = 0;
+  self->hb_common = *self->common;
+  self->fresh = BROTLI_TRUE;
   self->params = params;
   /* TODO: Initialize of the hashers is defered to Prepare (and params
      remembered here) because we don't get the one_shot and input_size params
@@ -49,87 +54,71 @@ static void FN(Initialize)(
      those params to all hashers FN(Initialize) */
 }
 
-static void FN(Prepare)(HasherHandle handle, BROTLI_BOOL one_shot,
-    size_t input_size, const uint8_t* data) {
-  HashComposite* self = FN(Self)(handle);
-  if (!self->ha) {
-    HasherCommon* common_a;
-    HasherCommon* common_b;
-
-    self->ha = handle + sizeof(HasherCommon) + sizeof(HashComposite);
-    common_a = (HasherCommon*)self->ha;
-    common_a->params = self->params->hasher;
-    common_a->is_prepared_ = BROTLI_FALSE;
-    common_a->dict_num_lookups = 0;
-    common_a->dict_num_matches = 0;
-    FN_A(Initialize)(self->ha, self->params);
-
-    self->hb = self->ha + sizeof(HasherCommon) + FN_A(HashMemAllocInBytes)(
-        self->params, one_shot, input_size);
-    common_b = (HasherCommon*)self->hb;
-    common_b->params = self->params->hasher;
-    common_b->is_prepared_ = BROTLI_FALSE;
-    common_b->dict_num_lookups = 0;
-    common_b->dict_num_matches = 0;
-    FN_B(Initialize)(self->hb, self->params);
+static void FN(Prepare)(
+    HashComposite* BROTLI_RESTRICT self, BROTLI_BOOL one_shot,
+    size_t input_size, const uint8_t* BROTLI_RESTRICT data) {
+  if (self->fresh) {
+    self->fresh = BROTLI_FALSE;
+    self->hb_common.extra = (uint8_t*)self->extra +
+        FN_A(HashMemAllocInBytes)(self->params, one_shot, input_size);
+
+    FN_A(Initialize)(self->common, &self->ha, self->params);
+    FN_B(Initialize)(&self->hb_common, &self->hb, self->params);
   }
-  FN_A(Prepare)(self->ha, one_shot, input_size, data);
-  FN_B(Prepare)(self->hb, one_shot, input_size, data);
+  FN_A(Prepare)(&self->ha, one_shot, input_size, data);
+  FN_B(Prepare)(&self->hb, one_shot, input_size, data);
 }
 
 static BROTLI_INLINE size_t FN(HashMemAllocInBytes)(
     const BrotliEncoderParams* params, BROTLI_BOOL one_shot,
     size_t input_size) {
-  return sizeof(HashComposite) + 2 * sizeof(HasherCommon) +
-      FN_A(HashMemAllocInBytes)(params, one_shot, input_size) +
+  return FN_A(HashMemAllocInBytes)(params, one_shot, input_size) +
       FN_B(HashMemAllocInBytes)(params, one_shot, input_size);
 }
 
-static BROTLI_INLINE void FN(Store)(HasherHandle BROTLI_RESTRICT handle,
+static BROTLI_INLINE void FN(Store)(HashComposite* BROTLI_RESTRICT self,
     const uint8_t* BROTLI_RESTRICT data, const size_t mask, const size_t ix) {
-  HashComposite* self = FN(Self)(handle);
-  FN_A(Store)(self->ha, data, mask, ix);
-  FN_B(Store)(self->hb, data, mask, ix);
+  FN_A(Store)(&self->ha, data, mask, ix);
+  FN_B(Store)(&self->hb, data, mask, ix);
 }
 
-static BROTLI_INLINE void FN(StoreRange)(HasherHandle handle,
-    const uint8_t* data, const size_t mask, const size_t ix_start,
+static BROTLI_INLINE void FN(StoreRange)(
+    HashComposite* BROTLI_RESTRICT self, const uint8_t* BROTLI_RESTRICT data,
+    const size_t mask, const size_t ix_start,
     const size_t ix_end) {
-  HashComposite* self = FN(Self)(handle);
-  FN_A(StoreRange)(self->ha, data, mask, ix_start, ix_end);
-  FN_B(StoreRange)(self->hb, data, mask, ix_start, ix_end);
+  FN_A(StoreRange)(&self->ha, data, mask, ix_start, ix_end);
+  FN_B(StoreRange)(&self->hb, data, mask, ix_start, ix_end);
 }
 
-static BROTLI_INLINE void FN(StitchToPreviousBlock)(HasherHandle handle,
+static BROTLI_INLINE void FN(StitchToPreviousBlock)(
+    HashComposite* BROTLI_RESTRICT self,
     size_t num_bytes, size_t position, const uint8_t* ringbuffer,
     size_t ring_buffer_mask) {
-  HashComposite* self = FN(Self)(handle);
-  FN_A(StitchToPreviousBlock)(self->ha, num_bytes, position, ringbuffer,
-      ring_buffer_mask);
-  FN_B(StitchToPreviousBlock)(self->hb, num_bytes, position, ringbuffer,
-      ring_buffer_mask);
+  FN_A(StitchToPreviousBlock)(&self->ha, num_bytes, position,
+      ringbuffer, ring_buffer_mask);
+  FN_B(StitchToPreviousBlock)(&self->hb, num_bytes, position,
+      ringbuffer, ring_buffer_mask);
 }
 
 static BROTLI_INLINE void FN(PrepareDistanceCache)(
-    HasherHandle handle, int* BROTLI_RESTRICT distance_cache) {
-  HashComposite* self = FN(Self)(handle);
-  FN_A(PrepareDistanceCache)(self->ha, distance_cache);
-  FN_B(PrepareDistanceCache)(self->hb, distance_cache);
+    HashComposite* BROTLI_RESTRICT self, int* BROTLI_RESTRICT distance_cache) {
+  FN_A(PrepareDistanceCache)(&self->ha, distance_cache);
+  FN_B(PrepareDistanceCache)(&self->hb, distance_cache);
 }
 
-static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
+static BROTLI_INLINE void FN(FindLongestMatch)(
+    HashComposite* BROTLI_RESTRICT self,
     const BrotliEncoderDictionary* dictionary,
     const uint8_t* BROTLI_RESTRICT data, const size_t ring_buffer_mask,
     const int* BROTLI_RESTRICT distance_cache, const size_t cur_ix,
     const size_t max_length, const size_t max_backward,
-    const size_t gap, const size_t max_distance,
+    const size_t dictionary_distance, const size_t max_distance,
     HasherSearchResult* BROTLI_RESTRICT out) {
-  HashComposite* self = FN(Self)(handle);
-  FN_A(FindLongestMatch)(self->ha, dictionary, data, ring_buffer_mask,
-      distance_cache, cur_ix, max_length, max_backward, gap,
+  FN_A(FindLongestMatch)(&self->ha, dictionary, data, ring_buffer_mask,
+      distance_cache, cur_ix, max_length, max_backward, dictionary_distance,
       max_distance, out);
-  FN_B(FindLongestMatch)(self->hb, dictionary, data, ring_buffer_mask,
-      distance_cache, cur_ix, max_length, max_backward, gap,
+  FN_B(FindLongestMatch)(&self->hb, dictionary, data, ring_buffer_mask,
+      distance_cache, cur_ix, max_length, max_backward, dictionary_distance,
       max_distance, out);
 }
 
diff --git a/modules/brotli/enc/hash_forgetful_chain_inc.h b/modules/brotli/enc/hash_forgetful_chain_inc.h
index 41cb3ff03..bfae6ba6a 100644
--- a/modules/brotli/enc/hash_forgetful_chain_inc.h
+++ b/modules/brotli/enc/hash_forgetful_chain_inc.h
@@ -28,7 +28,7 @@ static BROTLI_INLINE size_t FN(HashTypeLength)(void) { return 4; }
 static BROTLI_INLINE size_t FN(StoreLookahead)(void) { return 4; }
 
 /* HashBytes is the function that chooses the bucket to place the address in.*/
-static BROTLI_INLINE size_t FN(HashBytes)(const uint8_t* data) {
+static BROTLI_INLINE size_t FN(HashBytes)(const uint8_t* BROTLI_RESTRICT data) {
   const uint32_t h = BROTLI_UNALIGNED_LOAD32LE(data) * kHashMul32;
   /* The higher bits contain more mixture from the multiplication,
      so we take our results from there. */
@@ -45,28 +45,56 @@ typedef struct FN(Bank) {
 } FN(Bank);
 
 typedef struct HashForgetfulChain {
-  uint32_t addr[BUCKET_SIZE];
-  uint16_t head[BUCKET_SIZE];
-  /* Truncated hash used for quick rejection of "distance cache" candidates. */
-  uint8_t tiny_hash[65536];
-  FN(Bank) banks[NUM_BANKS];
-  uint16_t free_slot_idx[NUM_BANKS];
+  uint16_t free_slot_idx[NUM_BANKS];  /* Up to 1KiB. Move to dynamic? */
   size_t max_hops;
+
+  /* Shortcuts. */
+  void* extra;
+  HasherCommon* common;
+
+  /* --- Dynamic size members --- */
+
+  /* uint32_t addr[BUCKET_SIZE]; */
+
+  /* uint16_t head[BUCKET_SIZE]; */
+
+  /* Truncated hash used for quick rejection of "distance cache" candidates. */
+  /* uint8_t tiny_hash[65536];*/
+
+  /* FN(Bank) banks[NUM_BANKS]; */
 } HashForgetfulChain;
 
-static BROTLI_INLINE HashForgetfulChain* FN(Self)(HasherHandle handle) {
-  return (HashForgetfulChain*)&(GetHasherCommon(handle)[1]);
+static uint32_t* FN(Addr)(void* extra) {
+  return (uint32_t*)extra;
+}
+
+static uint16_t* FN(Head)(void* extra) {
+  return (uint16_t*)(&FN(Addr)(extra)[BUCKET_SIZE]);
+}
+
+static uint8_t* FN(TinyHash)(void* extra) {
+  return (uint8_t*)(&FN(Head)(extra)[BUCKET_SIZE]);
+}
+
+static FN(Bank)* FN(Banks)(void* extra) {
+  return (FN(Bank)*)(&FN(TinyHash)(extra)[65536]);
 }
 
 static void FN(Initialize)(
-    HasherHandle handle, const BrotliEncoderParams* params) {
-  FN(Self)(handle)->max_hops =
-      (params->quality > 6 ? 7u : 8u) << (params->quality - 4);
+    HasherCommon* common, HashForgetfulChain* BROTLI_RESTRICT self,
+    const BrotliEncoderParams* params) {
+  self->common = common;
+  self->extra = common->extra;
+
+  self->max_hops = (params->quality > 6 ? 7u : 8u) << (params->quality - 4);
 }
 
-static void FN(Prepare)(HasherHandle handle, BROTLI_BOOL one_shot,
-    size_t input_size, const uint8_t* data) {
-  HashForgetfulChain* self = FN(Self)(handle);
+static void FN(Prepare)(
+    HashForgetfulChain* BROTLI_RESTRICT self, BROTLI_BOOL one_shot,
+    size_t input_size, const uint8_t* BROTLI_RESTRICT data) {
+  uint32_t* BROTLI_RESTRICT addr = FN(Addr)(self->extra);
+  uint16_t* BROTLI_RESTRICT head = FN(Head)(self->extra);
+  uint8_t* BROTLI_RESTRICT tiny_hash = FN(TinyHash)(self->extra);
   /* Partial preparation is 100 times slower (per socket). */
   size_t partial_prepare_threshold = BUCKET_SIZE >> 6;
   if (one_shot && input_size <= partial_prepare_threshold) {
@@ -74,17 +102,17 @@ static void FN(Prepare)(HasherHandle handle, BROTLI_BOOL one_shot,
     for (i = 0; i < input_size; ++i) {
       size_t bucket = FN(HashBytes)(&data[i]);
       /* See InitEmpty comment. */
-      self->addr[bucket] = 0xCCCCCCCC;
-      self->head[bucket] = 0xCCCC;
+      addr[bucket] = 0xCCCCCCCC;
+      head[bucket] = 0xCCCC;
     }
   } else {
     /* Fill |addr| array with 0xCCCCCCCC value. Because of wrapping, position
        processed by hasher never reaches 3GB + 64M; this makes all new chains
        to be terminated after the first node. */
-    memset(self->addr, 0xCC, sizeof(self->addr));
-    memset(self->head, 0, sizeof(self->head));
+    memset(addr, 0xCC, sizeof(uint32_t) * BUCKET_SIZE);
+    memset(head, 0, sizeof(uint16_t) * BUCKET_SIZE);
   }
-  memset(self->tiny_hash, 0, sizeof(self->tiny_hash));
+  memset(tiny_hash, 0, sizeof(uint8_t) * 65536);
   memset(self->free_slot_idx, 0, sizeof(self->free_slot_idx));
 }
 
@@ -94,51 +122,58 @@ static BROTLI_INLINE size_t FN(HashMemAllocInBytes)(
   BROTLI_UNUSED(params);
   BROTLI_UNUSED(one_shot);
   BROTLI_UNUSED(input_size);
-  return sizeof(HashForgetfulChain);
+  return sizeof(uint32_t) * BUCKET_SIZE + sizeof(uint16_t) * BUCKET_SIZE +
+         sizeof(uint8_t) * 65536 + sizeof(FN(Bank)) * NUM_BANKS;
 }
 
 /* Look at 4 bytes at &data[ix & mask]. Compute a hash from these, and prepend
    node to corresponding chain; also update tiny_hash for current position. */
-static BROTLI_INLINE void FN(Store)(HasherHandle BROTLI_RESTRICT handle,
+static BROTLI_INLINE void FN(Store)(HashForgetfulChain* BROTLI_RESTRICT self,
     const uint8_t* BROTLI_RESTRICT data, const size_t mask, const size_t ix) {
-  HashForgetfulChain* self = FN(Self)(handle);
+  uint32_t* BROTLI_RESTRICT addr = FN(Addr)(self->extra);
+  uint16_t* BROTLI_RESTRICT head = FN(Head)(self->extra);
+  uint8_t* BROTLI_RESTRICT tiny_hash = FN(TinyHash)(self->extra);
+  FN(Bank)* BROTLI_RESTRICT banks = FN(Banks)(self->extra);
   const size_t key = FN(HashBytes)(&data[ix & mask]);
   const size_t bank = key & (NUM_BANKS - 1);
   const size_t idx = self->free_slot_idx[bank]++ & (BANK_SIZE - 1);
-  size_t delta = ix - self->addr[key];
-  self->tiny_hash[(uint16_t)ix] = (uint8_t)key;
+  size_t delta = ix - addr[key];
+  tiny_hash[(uint16_t)ix] = (uint8_t)key;
   if (delta > 0xFFFF) delta = CAPPED_CHAINS ? 0 : 0xFFFF;
-  self->banks[bank].slots[idx].delta = (uint16_t)delta;
-  self->banks[bank].slots[idx].next = self->head[key];
-  self->addr[key] = (uint32_t)ix;
-  self->head[key] = (uint16_t)idx;
+  banks[bank].slots[idx].delta = (uint16_t)delta;
+  banks[bank].slots[idx].next = head[key];
+  addr[key] = (uint32_t)ix;
+  head[key] = (uint16_t)idx;
 }
 
-static BROTLI_INLINE void FN(StoreRange)(HasherHandle handle,
-    const uint8_t* data, const size_t mask, const size_t ix_start,
-    const size_t ix_end) {
+static BROTLI_INLINE void FN(StoreRange)(
+    HashForgetfulChain* BROTLI_RESTRICT self,
+    const uint8_t* BROTLI_RESTRICT data, const size_t mask,
+    const size_t ix_start, const size_t ix_end) {
   size_t i;
   for (i = ix_start; i < ix_end; ++i) {
-    FN(Store)(handle, data, mask, i);
+    FN(Store)(self, data, mask, i);
   }
 }
 
-static BROTLI_INLINE void FN(StitchToPreviousBlock)(HasherHandle handle,
+static BROTLI_INLINE void FN(StitchToPreviousBlock)(
+    HashForgetfulChain* BROTLI_RESTRICT self,
     size_t num_bytes, size_t position, const uint8_t* ringbuffer,
     size_t ring_buffer_mask) {
   if (num_bytes >= FN(HashTypeLength)() - 1 && position >= 3) {
     /* Prepare the hashes for three last bytes of the last write.
        These could not be calculated before, since they require knowledge
        of both the previous and the current block. */
-    FN(Store)(handle, ringbuffer, ring_buffer_mask, position - 3);
-    FN(Store)(handle, ringbuffer, ring_buffer_mask, position - 2);
-    FN(Store)(handle, ringbuffer, ring_buffer_mask, position - 1);
+    FN(Store)(self, ringbuffer, ring_buffer_mask, position - 3);
+    FN(Store)(self, ringbuffer, ring_buffer_mask, position - 2);
+    FN(Store)(self, ringbuffer, ring_buffer_mask, position - 1);
   }
 }
 
 static BROTLI_INLINE void FN(PrepareDistanceCache)(
-    HasherHandle handle, int* BROTLI_RESTRICT distance_cache) {
-  BROTLI_UNUSED(handle);
+    HashForgetfulChain* BROTLI_RESTRICT self,
+    int* BROTLI_RESTRICT distance_cache) {
+  BROTLI_UNUSED(self);
   PrepareDistanceCache(distance_cache, NUM_LAST_DISTANCES_TO_CHECK);
 }
 
@@ -153,14 +188,18 @@ static BROTLI_INLINE void FN(PrepareDistanceCache)(
    Does not look for matches further away than max_backward.
    Writes the best match into |out|.
    |out|->score is updated only if a better match is found. */
-static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
+static BROTLI_INLINE void FN(FindLongestMatch)(
+    HashForgetfulChain* BROTLI_RESTRICT self,
     const BrotliEncoderDictionary* dictionary,
     const uint8_t* BROTLI_RESTRICT data, const size_t ring_buffer_mask,
     const int* BROTLI_RESTRICT distance_cache,
     const size_t cur_ix, const size_t max_length, const size_t max_backward,
-    const size_t gap, const size_t max_distance,
+    const size_t dictionary_distance, const size_t max_distance,
     HasherSearchResult* BROTLI_RESTRICT out) {
-  HashForgetfulChain* self = FN(Self)(handle);
+  uint32_t* BROTLI_RESTRICT addr = FN(Addr)(self->extra);
+  uint16_t* BROTLI_RESTRICT head = FN(Head)(self->extra);
+  uint8_t* BROTLI_RESTRICT tiny_hashes = FN(TinyHash)(self->extra);
+  FN(Bank)* BROTLI_RESTRICT banks = FN(Banks)(self->extra);
   const size_t cur_ix_masked = cur_ix & ring_buffer_mask;
   /* Don't accept a short copy from far away. */
   score_t min_score = out->score;
@@ -176,7 +215,7 @@ static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
     const size_t backward = (size_t)distance_cache[i];
     size_t prev_ix = (cur_ix - backward);
     /* For distance code 0 we want to consider 2-byte matches. */
-    if (i > 0 && self->tiny_hash[(uint16_t)prev_ix] != tiny_hash) continue;
+    if (i > 0 && tiny_hashes[(uint16_t)prev_ix] != tiny_hash) continue;
     if (prev_ix >= cur_ix || backward > max_backward) {
       continue;
     }
@@ -204,16 +243,16 @@ static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
     const size_t bank = key & (NUM_BANKS - 1);
     size_t backward = 0;
     size_t hops = self->max_hops;
-    size_t delta = cur_ix - self->addr[key];
-    size_t slot = self->head[key];
+    size_t delta = cur_ix - addr[key];
+    size_t slot = head[key];
     while (hops--) {
       size_t prev_ix;
       size_t last = slot;
       backward += delta;
       if (backward > max_backward || (CAPPED_CHAINS && !delta)) break;
       prev_ix = (cur_ix - backward) & ring_buffer_mask;
-      slot = self->banks[bank].slots[last].next;
-      delta = self->banks[bank].slots[last].delta;
+      slot = banks[bank].slots[last].next;
+      delta = banks[bank].slots[last].delta;
       if (cur_ix_masked + best_len > ring_buffer_mask ||
           prev_ix + best_len > ring_buffer_mask ||
           data[cur_ix_masked + best_len] != data[prev_ix + best_len]) {
@@ -238,11 +277,11 @@ static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
         }
       }
     }
-    FN(Store)(handle, data, ring_buffer_mask, cur_ix);
+    FN(Store)(self, data, ring_buffer_mask, cur_ix);
   }
   if (out->score == min_score) {
     SearchInStaticDictionary(dictionary,
-        handle, &data[cur_ix_masked], max_length, max_backward + gap,
+        self->common, &data[cur_ix_masked], max_length, dictionary_distance,
         max_distance, out, BROTLI_FALSE);
   }
 }
diff --git a/modules/brotli/enc/hash_longest_match64_inc.h b/modules/brotli/enc/hash_longest_match64_inc.h
index cb953a644..956fb304b 100644
--- a/modules/brotli/enc/hash_longest_match64_inc.h
+++ b/modules/brotli/enc/hash_longest_match64_inc.h
@@ -20,7 +20,7 @@ static BROTLI_INLINE size_t FN(HashTypeLength)(void) { return 8; }
 static BROTLI_INLINE size_t FN(StoreLookahead)(void) { return 8; }
 
 /* HashBytes is the function that chooses the bucket to place the address in. */
-static BROTLI_INLINE uint32_t FN(HashBytes)(const uint8_t* data,
+static BROTLI_INLINE uint32_t FN(HashBytes)(const uint8_t* BROTLI_RESTRICT data,
                                             const uint64_t mask,
                                             const int shift) {
   const uint64_t h = (BROTLI_UNALIGNED_LOAD64LE(data) & mask) * kHashMul64Long;
@@ -42,43 +42,43 @@ typedef struct HashLongestMatch {
   /* Mask for accessing entries in a block (in a ring-buffer manner). */
   uint32_t block_mask_;
 
+  int block_bits_;
+  int num_last_distances_to_check_;
+
+  /* Shortcuts. */
+  HasherCommon* common_;
+
   /* --- Dynamic size members --- */
 
   /* Number of entries in a particular bucket. */
-  /* uint16_t num[bucket_size]; */
+  uint16_t* num_;  /* uint16_t[bucket_size]; */
 
   /* Buckets containing block_size_ of backward references. */
-  /* uint32_t* buckets[bucket_size * block_size]; */
+  uint32_t* buckets_;  /* uint32_t[bucket_size * block_size]; */
 } HashLongestMatch;
 
-static BROTLI_INLINE HashLongestMatch* FN(Self)(HasherHandle handle) {
-  return (HashLongestMatch*)&(GetHasherCommon(handle)[1]);
-}
-
-static BROTLI_INLINE uint16_t* FN(Num)(HashLongestMatch* self) {
-  return (uint16_t*)(&self[1]);
-}
-
-static BROTLI_INLINE uint32_t* FN(Buckets)(HashLongestMatch* self) {
-  return (uint32_t*)(&FN(Num)(self)[self->bucket_size_]);
-}
-
 static void FN(Initialize)(
-    HasherHandle handle, const BrotliEncoderParams* params) {
-  HasherCommon* common = GetHasherCommon(handle);
-  HashLongestMatch* self = FN(Self)(handle);
+    HasherCommon* common, HashLongestMatch* BROTLI_RESTRICT self,
+    const BrotliEncoderParams* params) {
+  self->common_ = common;
+
   BROTLI_UNUSED(params);
   self->hash_shift_ = 64 - common->params.bucket_bits;
   self->hash_mask_ = (~((uint64_t)0U)) >> (64 - 8 * common->params.hash_len);
   self->bucket_size_ = (size_t)1 << common->params.bucket_bits;
+  self->block_bits_ = common->params.block_bits;
   self->block_size_ = (size_t)1 << common->params.block_bits;
   self->block_mask_ = (uint32_t)(self->block_size_ - 1);
+  self->num_last_distances_to_check_ =
+      common->params.num_last_distances_to_check;
+  self->num_ = (uint16_t*)common->extra;
+  self->buckets_ = (uint32_t*)&self->num_[self->bucket_size_];
 }
 
-static void FN(Prepare)(HasherHandle handle, BROTLI_BOOL one_shot,
-    size_t input_size, const uint8_t* data) {
-  HashLongestMatch* self = FN(Self)(handle);
-  uint16_t* num = FN(Num)(self);
+static void FN(Prepare)(
+    HashLongestMatch* BROTLI_RESTRICT self, BROTLI_BOOL one_shot,
+    size_t input_size, const uint8_t* BROTLI_RESTRICT data) {
+  uint16_t* BROTLI_RESTRICT num = self->num_;
   /* Partial preparation is 100 times slower (per socket). */
   size_t partial_prepare_threshold = self->bucket_size_ >> 6;
   if (one_shot && input_size <= partial_prepare_threshold) {
@@ -100,50 +100,52 @@ static BROTLI_INLINE size_t FN(HashMemAllocInBytes)(
   size_t block_size = (size_t)1 << params->hasher.block_bits;
   BROTLI_UNUSED(one_shot);
   BROTLI_UNUSED(input_size);
-  return sizeof(HashLongestMatch) + bucket_size * (2 + 4 * block_size);
+  return sizeof(uint16_t) * bucket_size +
+         sizeof(uint32_t) * bucket_size * block_size;
 }
 
 /* Look at 4 bytes at &data[ix & mask].
    Compute a hash from these, and store the value of ix at that position. */
-static BROTLI_INLINE void FN(Store)(HasherHandle handle, const uint8_t* data,
+static BROTLI_INLINE void FN(Store)(
+    HashLongestMatch* BROTLI_RESTRICT self, const uint8_t* BROTLI_RESTRICT data,
     const size_t mask, const size_t ix) {
-  HashLongestMatch* self = FN(Self)(handle);
-  uint16_t* num = FN(Num)(self);
+  uint16_t* BROTLI_RESTRICT num = self->num_;
+  uint32_t* BROTLI_RESTRICT buckets = self->buckets_;
   const uint32_t key = FN(HashBytes)(&data[ix & mask], self->hash_mask_,
                                      self->hash_shift_);
   const size_t minor_ix = num[key] & self->block_mask_;
-  const size_t offset =
-      minor_ix + (key << GetHasherCommon(handle)->params.block_bits);
-  FN(Buckets)(self)[offset] = (uint32_t)ix;
+  const size_t offset = minor_ix + (key << self->block_bits_);
   ++num[key];
+  buckets[offset] = (uint32_t)ix;
 }
 
-static BROTLI_INLINE void FN(StoreRange)(HasherHandle handle,
-    const uint8_t* data, const size_t mask, const size_t ix_start,
-    const size_t ix_end) {
+static BROTLI_INLINE void FN(StoreRange)(HashLongestMatch* BROTLI_RESTRICT self,
+    const uint8_t* BROTLI_RESTRICT data, const size_t mask,
+    const size_t ix_start, const size_t ix_end) {
   size_t i;
   for (i = ix_start; i < ix_end; ++i) {
-    FN(Store)(handle, data, mask, i);
+    FN(Store)(self, data, mask, i);
   }
 }
 
-static BROTLI_INLINE void FN(StitchToPreviousBlock)(HasherHandle handle,
+static BROTLI_INLINE void FN(StitchToPreviousBlock)(
+    HashLongestMatch* BROTLI_RESTRICT self,
     size_t num_bytes, size_t position, const uint8_t* ringbuffer,
     size_t ringbuffer_mask) {
   if (num_bytes >= FN(HashTypeLength)() - 1 && position >= 3) {
     /* Prepare the hashes for three last bytes of the last write.
        These could not be calculated before, since they require knowledge
        of both the previous and the current block. */
-    FN(Store)(handle, ringbuffer, ringbuffer_mask, position - 3);
-    FN(Store)(handle, ringbuffer, ringbuffer_mask, position - 2);
-    FN(Store)(handle, ringbuffer, ringbuffer_mask, position - 1);
+    FN(Store)(self, ringbuffer, ringbuffer_mask, position - 3);
+    FN(Store)(self, ringbuffer, ringbuffer_mask, position - 2);
+    FN(Store)(self, ringbuffer, ringbuffer_mask, position - 1);
   }
 }
 
 static BROTLI_INLINE void FN(PrepareDistanceCache)(
-    HasherHandle handle, int* BROTLI_RESTRICT distance_cache) {
-  PrepareDistanceCache(distance_cache,
-      GetHasherCommon(handle)->params.num_last_distances_to_check);
+    HashLongestMatch* BROTLI_RESTRICT self,
+    int* BROTLI_RESTRICT distance_cache) {
+  PrepareDistanceCache(distance_cache, self->num_last_distances_to_check_);
 }
 
 /* Find a longest backward match of &data[cur_ix] up to the length of
@@ -157,17 +159,16 @@ static BROTLI_INLINE void FN(PrepareDistanceCache)(
    Does not look for matches further away than max_backward.
    Writes the best match into |out|.
    |out|->score is updated only if a better match is found. */
-static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
+static BROTLI_INLINE void FN(FindLongestMatch)(
+    HashLongestMatch* BROTLI_RESTRICT self,
     const BrotliEncoderDictionary* dictionary,
     const uint8_t* BROTLI_RESTRICT data, const size_t ring_buffer_mask,
     const int* BROTLI_RESTRICT distance_cache, const size_t cur_ix,
     const size_t max_length, const size_t max_backward,
-    const size_t gap, const size_t max_distance,
+    const size_t dictionary_distance, const size_t max_distance,
     HasherSearchResult* BROTLI_RESTRICT out) {
-  HasherCommon* common = GetHasherCommon(handle);
-  HashLongestMatch* self = FN(Self)(handle);
-  uint16_t* num = FN(Num)(self);
-  uint32_t* buckets = FN(Buckets)(self);
+  uint16_t* BROTLI_RESTRICT num = self->num_;
+  uint32_t* BROTLI_RESTRICT buckets = self->buckets_;
   const size_t cur_ix_masked = cur_ix & ring_buffer_mask;
   /* Don't accept a short copy from far away. */
   score_t min_score = out->score;
@@ -177,7 +178,7 @@ static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
   out->len = 0;
   out->len_code_delta = 0;
   /* Try last distance first. */
-  for (i = 0; i < (size_t)common->params.num_last_distances_to_check; ++i) {
+  for (i = 0; i < (size_t)self->num_last_distances_to_check_; ++i) {
     const size_t backward = (size_t)distance_cache[i];
     size_t prev_ix = (size_t)(cur_ix - backward);
     if (prev_ix >= cur_ix) {
@@ -218,8 +219,7 @@ static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
   {
     const uint32_t key = FN(HashBytes)(
         &data[cur_ix_masked], self->hash_mask_, self->hash_shift_);
-    uint32_t* BROTLI_RESTRICT bucket =
-        &buckets[key << common->params.block_bits];
+    uint32_t* BROTLI_RESTRICT bucket = &buckets[key << self->block_bits_];
     const size_t down =
         (num[key] > self->block_size_) ?
         (num[key] - self->block_size_) : 0u;
@@ -259,7 +259,7 @@ static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
   }
   if (min_score == out->score) {
     SearchInStaticDictionary(dictionary,
-        handle, &data[cur_ix_masked], max_length, max_backward + gap,
+        self->common_, &data[cur_ix_masked], max_length, dictionary_distance,
         max_distance, out, BROTLI_FALSE);
   }
 }
diff --git a/modules/brotli/enc/hash_longest_match_inc.h b/modules/brotli/enc/hash_longest_match_inc.h
index 457f5a9ed..27f4463d7 100644
--- a/modules/brotli/enc/hash_longest_match_inc.h
+++ b/modules/brotli/enc/hash_longest_match_inc.h
@@ -20,7 +20,8 @@ static BROTLI_INLINE size_t FN(HashTypeLength)(void) { return 4; }
 static BROTLI_INLINE size_t FN(StoreLookahead)(void) { return 4; }
 
 /* HashBytes is the function that chooses the bucket to place the address in. */
-static uint32_t FN(HashBytes)(const uint8_t* data, const int shift) {
+static uint32_t FN(HashBytes)(
+    const uint8_t* BROTLI_RESTRICT data, const int shift) {
   uint32_t h = BROTLI_UNALIGNED_LOAD32LE(data) * kHashMul32;
   /* The higher bits contain more mixture from the multiplication,
      so we take our results from there. */
@@ -38,42 +39,46 @@ typedef struct HashLongestMatch {
   /* Mask for accessing entries in a block (in a ring-buffer manner). */
   uint32_t block_mask_;
 
+  int block_bits_;
+  int num_last_distances_to_check_;
+
+  /* Shortcuts. */
+  HasherCommon* common_;
+
   /* --- Dynamic size members --- */
 
   /* Number of entries in a particular bucket. */
-  /* uint16_t num[bucket_size]; */
+  uint16_t* num_;  /* uint16_t[bucket_size]; */
 
   /* Buckets containing block_size_ of backward references. */
-  /* uint32_t* buckets[bucket_size * block_size]; */
+  uint32_t* buckets_;  /* uint32_t[bucket_size * block_size]; */
 } HashLongestMatch;
 
-static BROTLI_INLINE HashLongestMatch* FN(Self)(HasherHandle handle) {
-  return (HashLongestMatch*)&(GetHasherCommon(handle)[1]);
-}
-
-static BROTLI_INLINE uint16_t* FN(Num)(HashLongestMatch* self) {
-  return (uint16_t*)(&self[1]);
-}
-
-static BROTLI_INLINE uint32_t* FN(Buckets)(HashLongestMatch* self) {
-  return (uint32_t*)(&FN(Num)(self)[self->bucket_size_]);
+static BROTLI_INLINE uint16_t* FN(Num)(void* extra) {
+  return (uint16_t*)extra;
 }
 
 static void FN(Initialize)(
-    HasherHandle handle, const BrotliEncoderParams* params) {
-  HasherCommon* common = GetHasherCommon(handle);
-  HashLongestMatch* self = FN(Self)(handle);
+    HasherCommon* common, HashLongestMatch* BROTLI_RESTRICT self,
+    const BrotliEncoderParams* params) {
+  self->common_ = common;
+
   BROTLI_UNUSED(params);
   self->hash_shift_ = 32 - common->params.bucket_bits;
   self->bucket_size_ = (size_t)1 << common->params.bucket_bits;
   self->block_size_ = (size_t)1 << common->params.block_bits;
   self->block_mask_ = (uint32_t)(self->block_size_ - 1);
+  self->num_ = (uint16_t*)common->extra;
+  self->buckets_ = (uint32_t*)(&self->num_[self->bucket_size_]);
+  self->block_bits_ = common->params.block_bits;
+  self->num_last_distances_to_check_ =
+      common->params.num_last_distances_to_check;
 }
 
-static void FN(Prepare)(HasherHandle handle, BROTLI_BOOL one_shot,
-    size_t input_size, const uint8_t* data) {
-  HashLongestMatch* self = FN(Self)(handle);
-  uint16_t* num = FN(Num)(self);
+static void FN(Prepare)(
+    HashLongestMatch* BROTLI_RESTRICT self, BROTLI_BOOL one_shot,
+    size_t input_size, const uint8_t* BROTLI_RESTRICT data) {
+  uint16_t* BROTLI_RESTRICT num = self->num_;
   /* Partial preparation is 100 times slower (per socket). */
   size_t partial_prepare_threshold = self->bucket_size_ >> 6;
   if (one_shot && input_size <= partial_prepare_threshold) {
@@ -94,49 +99,49 @@ static BROTLI_INLINE size_t FN(HashMemAllocInBytes)(
   size_t block_size = (size_t)1 << params->hasher.block_bits;
   BROTLI_UNUSED(one_shot);
   BROTLI_UNUSED(input_size);
-  return sizeof(HashLongestMatch) + bucket_size * (2 + 4 * block_size);
+  return sizeof(uint16_t) * bucket_size +
+         sizeof(uint32_t) * bucket_size * block_size;
 }
 
 /* Look at 4 bytes at &data[ix & mask].
    Compute a hash from these, and store the value of ix at that position. */
-static BROTLI_INLINE void FN(Store)(HasherHandle handle, const uint8_t* data,
+static BROTLI_INLINE void FN(Store)(
+    HashLongestMatch* BROTLI_RESTRICT self, const uint8_t* BROTLI_RESTRICT data,
     const size_t mask, const size_t ix) {
-  HashLongestMatch* self = FN(Self)(handle);
-  uint16_t* num = FN(Num)(self);
   const uint32_t key = FN(HashBytes)(&data[ix & mask], self->hash_shift_);
-  const size_t minor_ix = num[key] & self->block_mask_;
-  const size_t offset =
-      minor_ix + (key << GetHasherCommon(handle)->params.block_bits);
-  FN(Buckets)(self)[offset] = (uint32_t)ix;
-  ++num[key];
+  const size_t minor_ix = self->num_[key] & self->block_mask_;
+  const size_t offset = minor_ix + (key << self->block_bits_);
+  self->buckets_[offset] = (uint32_t)ix;
+  ++self->num_[key];
 }
 
-static BROTLI_INLINE void FN(StoreRange)(HasherHandle handle,
-    const uint8_t* data, const size_t mask, const size_t ix_start,
-    const size_t ix_end) {
+static BROTLI_INLINE void FN(StoreRange)(HashLongestMatch* BROTLI_RESTRICT self,
+    const uint8_t* BROTLI_RESTRICT data, const size_t mask,
+    const size_t ix_start, const size_t ix_end) {
   size_t i;
   for (i = ix_start; i < ix_end; ++i) {
-    FN(Store)(handle, data, mask, i);
+    FN(Store)(self, data, mask, i);
   }
 }
 
-static BROTLI_INLINE void FN(StitchToPreviousBlock)(HasherHandle handle,
+static BROTLI_INLINE void FN(StitchToPreviousBlock)(
+    HashLongestMatch* BROTLI_RESTRICT self,
     size_t num_bytes, size_t position, const uint8_t* ringbuffer,
     size_t ringbuffer_mask) {
   if (num_bytes >= FN(HashTypeLength)() - 1 && position >= 3) {
     /* Prepare the hashes for three last bytes of the last write.
        These could not be calculated before, since they require knowledge
        of both the previous and the current block. */
-    FN(Store)(handle, ringbuffer, ringbuffer_mask, position - 3);
-    FN(Store)(handle, ringbuffer, ringbuffer_mask, position - 2);
-    FN(Store)(handle, ringbuffer, ringbuffer_mask, position - 1);
+    FN(Store)(self, ringbuffer, ringbuffer_mask, position - 3);
+    FN(Store)(self, ringbuffer, ringbuffer_mask, position - 2);
+    FN(Store)(self, ringbuffer, ringbuffer_mask, position - 1);
   }
 }
 
 static BROTLI_INLINE void FN(PrepareDistanceCache)(
-    HasherHandle handle, int* BROTLI_RESTRICT distance_cache) {
-  PrepareDistanceCache(distance_cache,
-      GetHasherCommon(handle)->params.num_last_distances_to_check);
+    HashLongestMatch* BROTLI_RESTRICT self,
+    int* BROTLI_RESTRICT distance_cache) {
+  PrepareDistanceCache(distance_cache, self->num_last_distances_to_check_);
 }
 
 /* Find a longest backward match of &data[cur_ix] up to the length of
@@ -150,17 +155,16 @@ static BROTLI_INLINE void FN(PrepareDistanceCache)(
    Does not look for matches further away than max_backward.
    Writes the best match into |out|.
    |out|->score is updated only if a better match is found. */
-static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
+static BROTLI_INLINE void FN(FindLongestMatch)(
+    HashLongestMatch* BROTLI_RESTRICT self,
     const BrotliEncoderDictionary* dictionary,
     const uint8_t* BROTLI_RESTRICT data, const size_t ring_buffer_mask,
     const int* BROTLI_RESTRICT distance_cache, const size_t cur_ix,
     const size_t max_length, const size_t max_backward,
-    const size_t gap, const size_t max_distance,
+    const size_t dictionary_distance, const size_t max_distance,
     HasherSearchResult* BROTLI_RESTRICT out) {
-  HasherCommon* common = GetHasherCommon(handle);
-  HashLongestMatch* self = FN(Self)(handle);
-  uint16_t* num = FN(Num)(self);
-  uint32_t* buckets = FN(Buckets)(self);
+  uint16_t* BROTLI_RESTRICT num = self->num_;
+  uint32_t* BROTLI_RESTRICT buckets = self->buckets_;
   const size_t cur_ix_masked = cur_ix & ring_buffer_mask;
   /* Don't accept a short copy from far away. */
   score_t min_score = out->score;
@@ -170,7 +174,7 @@ static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
   out->len = 0;
   out->len_code_delta = 0;
   /* Try last distance first. */
-  for (i = 0; i < (size_t)common->params.num_last_distances_to_check; ++i) {
+  for (i = 0; i < (size_t)self->num_last_distances_to_check_; ++i) {
     const size_t backward = (size_t)distance_cache[i];
     size_t prev_ix = (size_t)(cur_ix - backward);
     if (prev_ix >= cur_ix) {
@@ -211,8 +215,7 @@ static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
   {
     const uint32_t key =
         FN(HashBytes)(&data[cur_ix_masked], self->hash_shift_);
-    uint32_t* BROTLI_RESTRICT bucket =
-        &buckets[key << common->params.block_bits];
+    uint32_t* BROTLI_RESTRICT bucket = &buckets[key << self->block_bits_];
     const size_t down =
         (num[key] > self->block_size_) ? (num[key] - self->block_size_) : 0u;
     for (i = num[key]; i > down;) {
@@ -251,7 +254,7 @@ static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
   }
   if (min_score == out->score) {
     SearchInStaticDictionary(dictionary,
-        handle, &data[cur_ix_masked], max_length, max_backward + gap,
+        self->common_, &data[cur_ix_masked], max_length, dictionary_distance,
         max_distance, out, BROTLI_FALSE);
   }
 }
diff --git a/modules/brotli/enc/hash_longest_match_quickly_inc.h b/modules/brotli/enc/hash_longest_match_quickly_inc.h
index a7b9639fe..e5ba840ab 100644
--- a/modules/brotli/enc/hash_longest_match_quickly_inc.h
+++ b/modules/brotli/enc/hash_longest_match_quickly_inc.h
@@ -5,15 +5,16 @@
    See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
 */
 
-/* template parameters: FN, BUCKET_BITS, BUCKET_SWEEP, HASH_LEN,
+/* template parameters: FN, BUCKET_BITS, BUCKET_SWEEP_BITS, HASH_LEN,
                         USE_DICTIONARY
  */
 
 #define HashLongestMatchQuickly HASHER()
 
 #define BUCKET_SIZE (1 << BUCKET_BITS)
-
-#define HASH_MAP_SIZE (4 << BUCKET_BITS)
+#define BUCKET_MASK (BUCKET_SIZE - 1)
+#define BUCKET_SWEEP (1 << BUCKET_SWEEP_BITS)
+#define BUCKET_SWEEP_MASK ((BUCKET_SWEEP - 1) << 3)
 
 static BROTLI_INLINE size_t FN(HashTypeLength)(void) { return 8; }
 static BROTLI_INLINE size_t FN(StoreLookahead)(void) { return 8; }
@@ -32,39 +33,50 @@ static uint32_t FN(HashBytes)(const uint8_t* data) {
 /* A (forgetful) hash table to the data seen by the compressor, to
    help create backward references to previous data.
 
-   This is a hash map of fixed size (BUCKET_SIZE). Starting from the
-   given index, BUCKET_SWEEP buckets are used to store values of a key. */
+   This is a hash map of fixed size (BUCKET_SIZE). */
 typedef struct HashLongestMatchQuickly {
-  uint32_t buckets_[BUCKET_SIZE + BUCKET_SWEEP];
-} HashLongestMatchQuickly;
+  /* Shortcuts. */
+  HasherCommon* common;
 
-static BROTLI_INLINE HashLongestMatchQuickly* FN(Self)(HasherHandle handle) {
-  return (HashLongestMatchQuickly*)&(GetHasherCommon(handle)[1]);
-}
+  /* --- Dynamic size members --- */
+
+  uint32_t* buckets_;  /* uint32_t[BUCKET_SIZE]; */
+} HashLongestMatchQuickly;
 
 static void FN(Initialize)(
-    HasherHandle handle, const BrotliEncoderParams* params) {
-  BROTLI_UNUSED(handle);
+    HasherCommon* common, HashLongestMatchQuickly* BROTLI_RESTRICT self,
+    const BrotliEncoderParams* params) {
+  self->common = common;
+
   BROTLI_UNUSED(params);
+  self->buckets_ = (uint32_t*)common->extra;
 }
 
-static void FN(Prepare)(HasherHandle handle, BROTLI_BOOL one_shot,
-    size_t input_size, const uint8_t* data) {
-  HashLongestMatchQuickly* self = FN(Self)(handle);
+static void FN(Prepare)(
+    HashLongestMatchQuickly* BROTLI_RESTRICT self, BROTLI_BOOL one_shot,
+    size_t input_size, const uint8_t* BROTLI_RESTRICT data) {
+  uint32_t* BROTLI_RESTRICT buckets = self->buckets_;
   /* Partial preparation is 100 times slower (per socket). */
-  size_t partial_prepare_threshold = HASH_MAP_SIZE >> 7;
+  size_t partial_prepare_threshold = BUCKET_SIZE >> 5;
   if (one_shot && input_size <= partial_prepare_threshold) {
     size_t i;
     for (i = 0; i < input_size; ++i) {
       const uint32_t key = FN(HashBytes)(&data[i]);
-      memset(&self->buckets_[key], 0, BUCKET_SWEEP * sizeof(self->buckets_[0]));
+      if (BUCKET_SWEEP == 1) {
+        buckets[key] = 0;
+      } else {
+        uint32_t j;
+        for (j = 0; j < BUCKET_SWEEP; ++j) {
+          buckets[(key + (j << 3)) & BUCKET_MASK] = 0;
+        }
+      }
     }
   } else {
     /* It is not strictly necessary to fill this buffer here, but
        not filling will make the results of the compression stochastic
        (but correct). This is because random data would cause the
        system to find accidentally good backward references here and there. */
-    memset(&self->buckets_[0], 0, sizeof(self->buckets_));
+    memset(buckets, 0, sizeof(uint32_t) * BUCKET_SIZE);
   }
 }
 
@@ -74,45 +86,53 @@ static BROTLI_INLINE size_t FN(HashMemAllocInBytes)(
   BROTLI_UNUSED(params);
   BROTLI_UNUSED(one_shot);
   BROTLI_UNUSED(input_size);
-  return sizeof(HashLongestMatchQuickly);
+  return sizeof(uint32_t) * BUCKET_SIZE;
 }
 
 /* Look at 5 bytes at &data[ix & mask].
    Compute a hash from these, and store the value somewhere within
    [ix .. ix+3]. */
-static BROTLI_INLINE void FN(Store)(HasherHandle handle,
-    const uint8_t* data, const size_t mask, const size_t ix) {
+static BROTLI_INLINE void FN(Store)(
+    HashLongestMatchQuickly* BROTLI_RESTRICT self,
+    const uint8_t* BROTLI_RESTRICT data, const size_t mask, const size_t ix) {
   const uint32_t key = FN(HashBytes)(&data[ix & mask]);
-  /* Wiggle the value with the bucket sweep range. */
-  const uint32_t off = (ix >> 3) % BUCKET_SWEEP;
-  FN(Self)(handle)->buckets_[key + off] = (uint32_t)ix;
+  if (BUCKET_SWEEP == 1) {
+    self->buckets_[key] = (uint32_t)ix;
+  } else {
+    /* Wiggle the value with the bucket sweep range. */
+    const uint32_t off = ix & BUCKET_SWEEP_MASK;
+    self->buckets_[(key + off) & BUCKET_MASK] = (uint32_t)ix;
+  }
 }
 
-static BROTLI_INLINE void FN(StoreRange)(HasherHandle handle,
-    const uint8_t* data, const size_t mask, const size_t ix_start,
-    const size_t ix_end) {
+static BROTLI_INLINE void FN(StoreRange)(
+    HashLongestMatchQuickly* BROTLI_RESTRICT self,
+    const uint8_t* BROTLI_RESTRICT data, const size_t mask,
+    const size_t ix_start, const size_t ix_end) {
   size_t i;
   for (i = ix_start; i < ix_end; ++i) {
-    FN(Store)(handle, data, mask, i);
+    FN(Store)(self, data, mask, i);
   }
 }
 
 static BROTLI_INLINE void FN(StitchToPreviousBlock)(
-    HasherHandle handle, size_t num_bytes, size_t position,
+    HashLongestMatchQuickly* BROTLI_RESTRICT self,
+    size_t num_bytes, size_t position,
     const uint8_t* ringbuffer, size_t ringbuffer_mask) {
   if (num_bytes >= FN(HashTypeLength)() - 1 && position >= 3) {
     /* Prepare the hashes for three last bytes of the last write.
        These could not be calculated before, since they require knowledge
        of both the previous and the current block. */
-    FN(Store)(handle, ringbuffer, ringbuffer_mask, position - 3);
-    FN(Store)(handle, ringbuffer, ringbuffer_mask, position - 2);
-    FN(Store)(handle, ringbuffer, ringbuffer_mask, position - 1);
+    FN(Store)(self, ringbuffer, ringbuffer_mask, position - 3);
+    FN(Store)(self, ringbuffer, ringbuffer_mask, position - 2);
+    FN(Store)(self, ringbuffer, ringbuffer_mask, position - 1);
   }
 }
 
 static BROTLI_INLINE void FN(PrepareDistanceCache)(
-    HasherHandle handle, int* BROTLI_RESTRICT distance_cache) {
-  BROTLI_UNUSED(handle);
+    HashLongestMatchQuickly* BROTLI_RESTRICT self,
+    int* BROTLI_RESTRICT distance_cache) {
+  BROTLI_UNUSED(self);
   BROTLI_UNUSED(distance_cache);
 }
 
@@ -125,17 +145,19 @@ static BROTLI_INLINE void FN(PrepareDistanceCache)(
    Writes the best match into |out|.
    |out|->score is updated only if a better match is found. */
 static BROTLI_INLINE void FN(FindLongestMatch)(
-    HasherHandle handle, const BrotliEncoderDictionary* dictionary,
+    HashLongestMatchQuickly* BROTLI_RESTRICT self,
+    const BrotliEncoderDictionary* dictionary,
     const uint8_t* BROTLI_RESTRICT data,
     const size_t ring_buffer_mask, const int* BROTLI_RESTRICT distance_cache,
     const size_t cur_ix, const size_t max_length, const size_t max_backward,
-    const size_t gap, const size_t max_distance,
+    const size_t dictionary_distance, const size_t max_distance,
     HasherSearchResult* BROTLI_RESTRICT out) {
-  HashLongestMatchQuickly* self = FN(Self)(handle);
+  uint32_t* BROTLI_RESTRICT buckets = self->buckets_;
   const size_t best_len_in = out->len;
   const size_t cur_ix_masked = cur_ix & ring_buffer_mask;
-  const uint32_t key = FN(HashBytes)(&data[cur_ix_masked]);
   int compare_char = data[cur_ix_masked + best_len_in];
+  size_t key = FN(HashBytes)(&data[cur_ix_masked]);
+  size_t key_out;
   score_t min_score = out->score;
   score_t best_score = out->score;
   size_t best_len = best_len_in;
@@ -145,21 +167,21 @@ static BROTLI_INLINE void FN(FindLongestMatch)(
   if (prev_ix < cur_ix) {
     prev_ix &= (uint32_t)ring_buffer_mask;
     if (compare_char == data[prev_ix + best_len]) {
-      size_t len = FindMatchLengthWithLimit(&data[prev_ix],
-                                            &data[cur_ix_masked],
-                                            max_length);
+      const size_t len = FindMatchLengthWithLimit(
+          &data[prev_ix], &data[cur_ix_masked], max_length);
       if (len >= 4) {
         const score_t score = BackwardReferenceScoreUsingLastDistance(len);
         if (best_score < score) {
-          best_score = score;
-          best_len = len;
           out->len = len;
           out->distance = cached_backward;
-          out->score = best_score;
-          compare_char = data[cur_ix_masked + best_len];
+          out->score = score;
           if (BUCKET_SWEEP == 1) {
-            self->buckets_[key] = (uint32_t)cur_ix;
+            buckets[key] = (uint32_t)cur_ix;
             return;
+          } else {
+            best_len = len;
+            best_score = score;
+            compare_char = data[cur_ix_masked + len];
           }
         }
       }
@@ -169,8 +191,8 @@ static BROTLI_INLINE void FN(FindLongestMatch)(
     size_t backward;
     size_t len;
     /* Only one to look for, don't bother to prepare for a loop. */
-    prev_ix = self->buckets_[key];
-    self->buckets_[key] = (uint32_t)cur_ix;
+    prev_ix = buckets[key];
+    buckets[key] = (uint32_t)cur_ix;
     backward = cur_ix - prev_ix;
     prev_ix &= (uint32_t)ring_buffer_mask;
     if (compare_char != data[prev_ix + best_len_in]) {
@@ -192,12 +214,17 @@ static BROTLI_INLINE void FN(FindLongestMatch)(
       }
     }
   } else {
-    uint32_t* bucket = self->buckets_ + key;
-    int i;
-    prev_ix = *bucket++;
-    for (i = 0; i < BUCKET_SWEEP; ++i, prev_ix = *bucket++) {
-      const size_t backward = cur_ix - prev_ix;
+    size_t keys[BUCKET_SWEEP];
+    size_t i;
+    for (i = 0; i < BUCKET_SWEEP; ++i) {
+      keys[i] = (key + (i << 3)) & BUCKET_MASK;
+    }
+    key_out = keys[(cur_ix & BUCKET_SWEEP_MASK) >> 3];
+    for (i = 0; i < BUCKET_SWEEP; ++i) {
       size_t len;
+      size_t backward;
+      prev_ix = buckets[keys[i]];
+      backward = cur_ix - prev_ix;
       prev_ix &= (uint32_t)ring_buffer_mask;
       if (compare_char != data[prev_ix + best_len]) {
         continue;
@@ -211,25 +238,29 @@ static BROTLI_INLINE void FN(FindLongestMatch)(
       if (len >= 4) {
         const score_t score = BackwardReferenceScore(len, backward);
         if (best_score < score) {
-          best_score = score;
           best_len = len;
-          out->len = best_len;
-          out->distance = backward;
+          out->len = len;
+          compare_char = data[cur_ix_masked + len];
+          best_score = score;
           out->score = score;
-          compare_char = data[cur_ix_masked + best_len];
+          out->distance = backward;
         }
       }
     }
   }
   if (USE_DICTIONARY && min_score == out->score) {
     SearchInStaticDictionary(dictionary,
-        handle, &data[cur_ix_masked], max_length, max_backward + gap,
+        self->common, &data[cur_ix_masked], max_length, dictionary_distance,
         max_distance, out, BROTLI_TRUE);
   }
-  self->buckets_[key + ((cur_ix >> 3) % BUCKET_SWEEP)] = (uint32_t)cur_ix;
+  if (BUCKET_SWEEP != 1) {
+    buckets[key_out] = (uint32_t)cur_ix;
+  }
 }
 
-#undef HASH_MAP_SIZE
+#undef BUCKET_SWEEP_MASK
+#undef BUCKET_SWEEP
+#undef BUCKET_MASK
 #undef BUCKET_SIZE
 
 #undef HashLongestMatchQuickly
diff --git a/modules/brotli/enc/hash_rolling_inc.h b/modules/brotli/enc/hash_rolling_inc.h
index 17f8a408e..586ae7385 100644
--- a/modules/brotli/enc/hash_rolling_inc.h
+++ b/modules/brotli/enc/hash_rolling_inc.h
@@ -51,13 +51,9 @@ typedef struct HashRolling {
   uint32_t factor_remove;
 } HashRolling;
 
-static BROTLI_INLINE HashRolling* FN(Self)(HasherHandle handle) {
-  return (HashRolling*)&(GetHasherCommon(handle)[1]);
-}
-
 static void FN(Initialize)(
-    HasherHandle handle, const BrotliEncoderParams* params) {
-  HashRolling* self = FN(Self)(handle);
+    HasherCommon* common, HashRolling* BROTLI_RESTRICT self,
+    const BrotliEncoderParams* params) {
   size_t i;
   self->state = 0;
   self->next_ix = 0;
@@ -71,7 +67,7 @@ static void FN(Initialize)(
     self->factor_remove *= self->factor;
   }
 
-  self->table = (uint32_t*)((HasherHandle)self + sizeof(HashRolling));
+  self->table = (uint32_t*)common->extra;
   for (i = 0; i < NUMBUCKETS; i++) {
     self->table[i] = FN(kInvalidPos);
   }
@@ -79,9 +75,8 @@ static void FN(Initialize)(
   BROTLI_UNUSED(params);
 }
 
-static void FN(Prepare)(HasherHandle handle, BROTLI_BOOL one_shot,
-    size_t input_size, const uint8_t* data) {
-  HashRolling* self = FN(Self)(handle);
+static void FN(Prepare)(HashRolling* BROTLI_RESTRICT self, BROTLI_BOOL one_shot,
+    size_t input_size, const uint8_t* BROTLI_RESTRICT data) {
   size_t i;
   /* Too small size, cannot use this hasher. */
   if (input_size < CHUNKLEN) return;
@@ -96,36 +91,36 @@ static void FN(Prepare)(HasherHandle handle, BROTLI_BOOL one_shot,
 static BROTLI_INLINE size_t FN(HashMemAllocInBytes)(
     const BrotliEncoderParams* params, BROTLI_BOOL one_shot,
     size_t input_size) {
-  return sizeof(HashRolling) + NUMBUCKETS * sizeof(uint32_t);
+  return NUMBUCKETS * sizeof(uint32_t);
   BROTLI_UNUSED(params);
   BROTLI_UNUSED(one_shot);
   BROTLI_UNUSED(input_size);
 }
 
-static BROTLI_INLINE void FN(Store)(HasherHandle BROTLI_RESTRICT handle,
+static BROTLI_INLINE void FN(Store)(HashRolling* BROTLI_RESTRICT self,
     const uint8_t* BROTLI_RESTRICT data, const size_t mask, const size_t ix) {
-  BROTLI_UNUSED(handle);
+  BROTLI_UNUSED(self);
   BROTLI_UNUSED(data);
   BROTLI_UNUSED(mask);
   BROTLI_UNUSED(ix);
 }
 
-static BROTLI_INLINE void FN(StoreRange)(HasherHandle handle,
-    const uint8_t* data, const size_t mask, const size_t ix_start,
-    const size_t ix_end) {
-  BROTLI_UNUSED(handle);
+static BROTLI_INLINE void FN(StoreRange)(HashRolling* BROTLI_RESTRICT self,
+    const uint8_t* BROTLI_RESTRICT data, const size_t mask,
+    const size_t ix_start, const size_t ix_end) {
+  BROTLI_UNUSED(self);
   BROTLI_UNUSED(data);
   BROTLI_UNUSED(mask);
   BROTLI_UNUSED(ix_start);
   BROTLI_UNUSED(ix_end);
 }
 
-static BROTLI_INLINE void FN(StitchToPreviousBlock)(HasherHandle handle,
+static BROTLI_INLINE void FN(StitchToPreviousBlock)(
+    HashRolling* BROTLI_RESTRICT self,
     size_t num_bytes, size_t position, const uint8_t* ringbuffer,
     size_t ring_buffer_mask) {
   /* In this case we must re-initialize the hasher from scratch from the
      current position. */
-  HashRolling* self = FN(Self)(handle);
   size_t position_masked;
   size_t available = num_bytes;
   if ((position & (JUMP - 1)) != 0) {
@@ -139,28 +134,29 @@ static BROTLI_INLINE void FN(StitchToPreviousBlock)(HasherHandle handle,
     available = ring_buffer_mask - position_masked;
   }
 
-  FN(Prepare)(handle, BROTLI_FALSE, available,
+  FN(Prepare)(self, BROTLI_FALSE, available,
       ringbuffer + (position & ring_buffer_mask));
   self->next_ix = position;
   BROTLI_UNUSED(num_bytes);
 }
 
 static BROTLI_INLINE void FN(PrepareDistanceCache)(
-    HasherHandle handle, int* BROTLI_RESTRICT distance_cache) {
-  BROTLI_UNUSED(handle);
+    HashRolling* BROTLI_RESTRICT self,
+    int* BROTLI_RESTRICT distance_cache) {
+  BROTLI_UNUSED(self);
   BROTLI_UNUSED(distance_cache);
 }
 
-static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
+static BROTLI_INLINE void FN(FindLongestMatch)(
+    HashRolling* BROTLI_RESTRICT self,
     const BrotliEncoderDictionary* dictionary,
     const uint8_t* BROTLI_RESTRICT data, const size_t ring_buffer_mask,
     const int* BROTLI_RESTRICT distance_cache, const size_t cur_ix,
     const size_t max_length, const size_t max_backward,
-    const size_t gap, const size_t max_distance,
+    const size_t dictionary_distance, const size_t max_distance,
     HasherSearchResult* BROTLI_RESTRICT out) {
-  HashRolling* self = FN(Self)(handle);
   const size_t cur_ix_masked = cur_ix & ring_buffer_mask;
-  size_t pos = self->next_ix;
+  size_t pos;
 
   if ((cur_ix & (JUMP - 1)) != 0) return;
 
@@ -209,7 +205,7 @@ static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
      backup-hasher, the main hasher already searches in it. */
   BROTLI_UNUSED(dictionary);
   BROTLI_UNUSED(distance_cache);
-  BROTLI_UNUSED(gap);
+  BROTLI_UNUSED(dictionary_distance);
   BROTLI_UNUSED(max_distance);
 }
 
diff --git a/modules/brotli/enc/hash_to_binary_tree_inc.h b/modules/brotli/enc/hash_to_binary_tree_inc.h
index 7fb0356f5..9880e0aef 100644
--- a/modules/brotli/enc/hash_to_binary_tree_inc.h
+++ b/modules/brotli/enc/hash_to_binary_tree_inc.h
@@ -24,7 +24,7 @@ static BROTLI_INLINE size_t FN(StoreLookahead)(void) {
   return MAX_TREE_COMP_LENGTH;
 }
 
-static uint32_t FN(HashBytes)(const uint8_t* data) {
+static uint32_t FN(HashBytes)(const uint8_t* BROTLI_RESTRICT data) {
   uint32_t h = BROTLI_UNALIGNED_LOAD32LE(data) * kHashMul32;
   /* The higher bits contain more mixture from the multiplication,
      so we take our results from there. */
@@ -38,7 +38,7 @@ typedef struct HashToBinaryTree {
   /* Hash table that maps the 4-byte hashes of the sequence to the last
      position where this hash was found, which is the root of the binary
      tree of sequences that share this hash bucket. */
-  uint32_t buckets_[BUCKET_SIZE];
+  uint32_t* buckets_;  /* uint32_t[BUCKET_SIZE]; */
 
   /* A position used to mark a non-existent sequence, i.e. a tree is empty if
      its root is at invalid_pos_ and a node is a leaf if both its children
@@ -51,34 +51,30 @@ typedef struct HashToBinaryTree {
      corresponding to a hash is a sequence starting at buckets_[hash] and
      the left and right children of a sequence starting at pos are
      forest_[2 * pos] and forest_[2 * pos + 1]. */
-  /* uint32_t forest[2 * num_nodes] */
+  uint32_t* forest_;  /* uint32_t[2 * num_nodes] */
 } HashToBinaryTree;
 
-static BROTLI_INLINE HashToBinaryTree* FN(Self)(HasherHandle handle) {
-  return (HashToBinaryTree*)&(GetHasherCommon(handle)[1]);
-}
-
-static BROTLI_INLINE uint32_t* FN(Forest)(HashToBinaryTree* self) {
-  return (uint32_t*)(&self[1]);
-}
-
 static void FN(Initialize)(
-    HasherHandle handle, const BrotliEncoderParams* params) {
-  HashToBinaryTree* self = FN(Self)(handle);
+    HasherCommon* common, HashToBinaryTree* BROTLI_RESTRICT self,
+    const BrotliEncoderParams* params) {
+  self->buckets_ = (uint32_t*)common->extra;
+  self->forest_ = &self->buckets_[BUCKET_SIZE];
+
   self->window_mask_ = (1u << params->lgwin) - 1u;
   self->invalid_pos_ = (uint32_t)(0 - self->window_mask_);
 }
 
-static void FN(Prepare)(HasherHandle handle, BROTLI_BOOL one_shot,
-    size_t input_size, const uint8_t* data) {
-  HashToBinaryTree* self = FN(Self)(handle);
+static void FN(Prepare)
+    (HashToBinaryTree* BROTLI_RESTRICT self, BROTLI_BOOL one_shot,
+    size_t input_size, const uint8_t* BROTLI_RESTRICT data) {
   uint32_t invalid_pos = self->invalid_pos_;
   uint32_t i;
+  uint32_t* BROTLI_RESTRICT buckets = self->buckets_;
   BROTLI_UNUSED(data);
   BROTLI_UNUSED(one_shot);
   BROTLI_UNUSED(input_size);
   for (i = 0; i < BUCKET_SIZE; i++) {
-    self->buckets_[i] = invalid_pos;
+    buckets[i] = invalid_pos;
   }
 }
 
@@ -89,15 +85,17 @@ static BROTLI_INLINE size_t FN(HashMemAllocInBytes)(
   if (one_shot && input_size < num_nodes) {
     num_nodes = input_size;
   }
-  return sizeof(HashToBinaryTree) + 2 * sizeof(uint32_t) * num_nodes;
+  return sizeof(uint32_t) * BUCKET_SIZE + 2 * sizeof(uint32_t) * num_nodes;
 }
 
-static BROTLI_INLINE size_t FN(LeftChildIndex)(HashToBinaryTree* self,
+static BROTLI_INLINE size_t FN(LeftChildIndex)(
+    HashToBinaryTree* BROTLI_RESTRICT self,
     const size_t pos) {
   return 2 * (pos & self->window_mask_);
 }
 
-static BROTLI_INLINE size_t FN(RightChildIndex)(HashToBinaryTree* self,
+static BROTLI_INLINE size_t FN(RightChildIndex)(
+    HashToBinaryTree* BROTLI_RESTRICT self,
     const size_t pos) {
   return 2 * (pos & self->window_mask_) + 1;
 }
@@ -113,7 +111,7 @@ static BROTLI_INLINE size_t FN(RightChildIndex)(HashToBinaryTree* self,
 
    This function must be called with increasing cur_ix positions. */
 static BROTLI_INLINE BackwardMatch* FN(StoreAndFindMatches)(
-    HashToBinaryTree* self, const uint8_t* const BROTLI_RESTRICT data,
+    HashToBinaryTree* BROTLI_RESTRICT self, const uint8_t* BROTLI_RESTRICT data,
     const size_t cur_ix, const size_t ring_buffer_mask, const size_t max_length,
     const size_t max_backward, size_t* const BROTLI_RESTRICT best_len,
     BackwardMatch* BROTLI_RESTRICT matches) {
@@ -123,8 +121,9 @@ static BROTLI_INLINE BackwardMatch* FN(StoreAndFindMatches)(
   const BROTLI_BOOL should_reroot_tree =
       TO_BROTLI_BOOL(max_length >= MAX_TREE_COMP_LENGTH);
   const uint32_t key = FN(HashBytes)(&data[cur_ix_masked]);
-  uint32_t* forest = FN(Forest)(self);
-  size_t prev_ix = self->buckets_[key];
+  uint32_t* BROTLI_RESTRICT buckets = self->buckets_;
+  uint32_t* BROTLI_RESTRICT forest = self->forest_;
+  size_t prev_ix = buckets[key];
   /* The forest index of the rightmost node of the left subtree of the new
      root, updated as we traverse and re-root the tree of the hash bucket. */
   size_t node_left = FN(LeftChildIndex)(self, cur_ix);
@@ -139,7 +138,7 @@ static BROTLI_INLINE BackwardMatch* FN(StoreAndFindMatches)(
   size_t best_len_right = 0;
   size_t depth_remaining;
   if (should_reroot_tree) {
-    self->buckets_[key] = (uint32_t)cur_ix;
+    buckets[key] = (uint32_t)cur_ix;
   }
   for (depth_remaining = MAX_TREE_SEARCH_DEPTH; ; --depth_remaining) {
     const size_t backward = cur_ix - prev_ix;
@@ -199,11 +198,13 @@ static BROTLI_INLINE BackwardMatch* FN(StoreAndFindMatches)(
    matches in matches[0] to matches[*num_matches - 1]. The matches will be
    sorted by strictly increasing length and (non-strictly) increasing
    distance. */
-static BROTLI_INLINE size_t FN(FindAllMatches)(HasherHandle handle,
-    const BrotliEncoderDictionary* dictionary, const uint8_t* data,
+static BROTLI_INLINE size_t FN(FindAllMatches)(
+    HashToBinaryTree* BROTLI_RESTRICT self,
+    const BrotliEncoderDictionary* dictionary,
+    const uint8_t* BROTLI_RESTRICT data,
     const size_t ring_buffer_mask, const size_t cur_ix,
     const size_t max_length, const size_t max_backward,
-    const size_t gap, const BrotliEncoderParams* params,
+    const size_t dictionary_distance, const BrotliEncoderParams* params,
     BackwardMatch* matches) {
   BackwardMatch* const orig_matches = matches;
   const size_t cur_ix_masked = cur_ix & ring_buffer_mask;
@@ -236,7 +237,7 @@ static BROTLI_INLINE size_t FN(FindAllMatches)(HasherHandle handle,
     }
   }
   if (best_len < max_length) {
-    matches = FN(StoreAndFindMatches)(FN(Self)(handle), data, cur_ix,
+    matches = FN(StoreAndFindMatches)(self, data, cur_ix,
         ring_buffer_mask, max_length, max_backward, &best_len, matches);
   }
   for (i = 0; i <= BROTLI_MAX_STATIC_DICTIONARY_MATCH_LEN; ++i) {
@@ -252,7 +253,7 @@ static BROTLI_INLINE size_t FN(FindAllMatches)(HasherHandle handle,
       for (l = minlen; l <= maxlen; ++l) {
         uint32_t dict_id = dict_matches[l];
         if (dict_id < kInvalidMatch) {
-          size_t distance = max_backward + gap + (dict_id >> 5) + 1;
+          size_t distance = dictionary_distance + (dict_id >> 5) + 1;
           if (distance <= params->dist.max_distance) {
             InitDictionaryBackwardMatch(matches++, distance, l, dict_id & 31);
           }
@@ -266,18 +267,18 @@ static BROTLI_INLINE size_t FN(FindAllMatches)(HasherHandle handle,
 /* Stores the hash of the next 4 bytes and re-roots the binary tree at the
    current sequence, without returning any matches.
    REQUIRES: ix + MAX_TREE_COMP_LENGTH <= end-of-current-block */
-static BROTLI_INLINE void FN(Store)(HasherHandle handle, const uint8_t* data,
+static BROTLI_INLINE void FN(Store)(HashToBinaryTree* BROTLI_RESTRICT self,
+    const uint8_t* BROTLI_RESTRICT data,
     const size_t mask, const size_t ix) {
-  HashToBinaryTree* self = FN(Self)(handle);
   /* Maximum distance is window size - 16, see section 9.1. of the spec. */
   const size_t max_backward = self->window_mask_ - BROTLI_WINDOW_GAP + 1;
   FN(StoreAndFindMatches)(self, data, ix, mask, MAX_TREE_COMP_LENGTH,
       max_backward, NULL, NULL);
 }
 
-static BROTLI_INLINE void FN(StoreRange)(HasherHandle handle,
-    const uint8_t* data, const size_t mask, const size_t ix_start,
-    const size_t ix_end) {
+static BROTLI_INLINE void FN(StoreRange)(HashToBinaryTree* BROTLI_RESTRICT self,
+    const uint8_t* BROTLI_RESTRICT data, const size_t mask,
+    const size_t ix_start, const size_t ix_end) {
   size_t i = ix_start;
   size_t j = ix_start;
   if (ix_start + 63 <= ix_end) {
@@ -285,18 +286,18 @@ static BROTLI_INLINE void FN(StoreRange)(HasherHandle handle,
   }
   if (ix_start + 512 <= i) {
     for (; j < i; j += 8) {
-      FN(Store)(handle, data, mask, j);
+      FN(Store)(self, data, mask, j);
     }
   }
   for (; i < ix_end; ++i) {
-    FN(Store)(handle, data, mask, i);
+    FN(Store)(self, data, mask, i);
   }
 }
 
-static BROTLI_INLINE void FN(StitchToPreviousBlock)(HasherHandle handle,
+static BROTLI_INLINE void FN(StitchToPreviousBlock)(
+    HashToBinaryTree* BROTLI_RESTRICT self,
     size_t num_bytes, size_t position, const uint8_t* ringbuffer,
     size_t ringbuffer_mask) {
-  HashToBinaryTree* self = FN(Self)(handle);
   if (num_bytes >= FN(HashTypeLength)() - 1 &&
       position >= MAX_TREE_COMP_LENGTH) {
     /* Store the last `MAX_TREE_COMP_LENGTH - 1` positions in the hasher.
diff --git a/modules/brotli/enc/memory.h b/modules/brotli/enc/memory.h
index ab928d019..832e7b2b6 100644
--- a/modules/brotli/enc/memory.h
+++ b/modules/brotli/enc/memory.h
@@ -56,6 +56,18 @@ BROTLI_INTERNAL void BrotliFree(MemoryManager* m, void* p);
 #define BROTLI_IS_OOM(M) (!!(M)->is_oom)
 #endif  /* BROTLI_ENCODER_EXIT_ON_OOM */
 
+/*
+BROTLI_IS_NULL is a fake check, BROTLI_IS_OOM does the heavy lifting.
+The only purpose of it is to explain static analyzers the state of things.
+NB: use ONLY together with BROTLI_IS_OOM
+    AND ONLY for allocations in the current scope.
+ */
+#if defined(__clang_analyzer__) && !defined(BROTLI_ENCODER_EXIT_ON_OOM)
+#define BROTLI_IS_NULL(A) ((A) == nullptr)
+#else  /* defined(__clang_analyzer__) */
+#define BROTLI_IS_NULL(A) (!!0)
+#endif  /* defined(__clang_analyzer__) */
+
 BROTLI_INTERNAL void BrotliWipeOutMemoryManager(MemoryManager* m);
 
 /*
@@ -66,18 +78,18 @@ A: array
 C: capacity
 R: requested size
 */
-#define BROTLI_ENSURE_CAPACITY(M, T, A, C, R) {  \
-  if (C < (R)) {                                 \
-    size_t _new_size = (C == 0) ? (R) : C;       \
-    T* new_array;                                \
-    while (_new_size < (R)) _new_size *= 2;      \
-    new_array = BROTLI_ALLOC((M), T, _new_size); \
-    if (!BROTLI_IS_OOM(M) && C != 0)             \
-      memcpy(new_array, A, C * sizeof(T));       \
-    BROTLI_FREE((M), A);                         \
-    A = new_array;                               \
-    C = _new_size;                               \
-  }                                              \
+#define BROTLI_ENSURE_CAPACITY(M, T, A, C, R) {                    \
+  if (C < (R)) {                                                   \
+    size_t _new_size = (C == 0) ? (R) : C;                         \
+    T* new_array;                                                  \
+    while (_new_size < (R)) _new_size *= 2;                        \
+    new_array = BROTLI_ALLOC((M), T, _new_size);                   \
+    if (!BROTLI_IS_OOM(M) && !BROTLI_IS_NULL(new_array) && C != 0) \
+      memcpy(new_array, A, C * sizeof(T));                         \
+    BROTLI_FREE((M), A);                                           \
+    A = new_array;                                                 \
+    C = _new_size;                                                 \
+  }                                                                \
 }
 
 /*
diff --git a/modules/brotli/enc/metablock.c b/modules/brotli/enc/metablock.c
index 4e80044f3..5aa4d4f17 100644
--- a/modules/brotli/enc/metablock.c
+++ b/modules/brotli/enc/metablock.c
@@ -28,34 +28,30 @@ extern "C" {
 void BrotliInitDistanceParams(BrotliEncoderParams* params,
     uint32_t npostfix, uint32_t ndirect) {
   BrotliDistanceParams* dist_params = &params->dist;
-  uint32_t alphabet_size, max_distance;
+  uint32_t alphabet_size_max;
+  uint32_t alphabet_size_limit;
+  uint32_t max_distance;
 
   dist_params->distance_postfix_bits = npostfix;
   dist_params->num_direct_distance_codes = ndirect;
 
-  alphabet_size = BROTLI_DISTANCE_ALPHABET_SIZE(
+  alphabet_size_max = BROTLI_DISTANCE_ALPHABET_SIZE(
       npostfix, ndirect, BROTLI_MAX_DISTANCE_BITS);
+  alphabet_size_limit = alphabet_size_max;
   max_distance = ndirect + (1U << (BROTLI_MAX_DISTANCE_BITS + npostfix + 2)) -
       (1U << (npostfix + 2));
 
   if (params->large_window) {
-    static const uint32_t bound[BROTLI_MAX_NPOSTFIX + 1] = {0, 4, 12, 28};
-    uint32_t postfix = 1U << npostfix;
-    alphabet_size = BROTLI_DISTANCE_ALPHABET_SIZE(
+    BrotliDistanceCodeLimit limit = BrotliCalculateDistanceCodeLimit(
+        BROTLI_MAX_ALLOWED_DISTANCE, npostfix, ndirect);
+    alphabet_size_max = BROTLI_DISTANCE_ALPHABET_SIZE(
         npostfix, ndirect, BROTLI_LARGE_MAX_DISTANCE_BITS);
-    /* The maximum distance is set so that no distance symbol used can encode
-       a distance larger than BROTLI_MAX_ALLOWED_DISTANCE with all
-       its extra bits set. */
-    if (ndirect < bound[npostfix]) {
-      max_distance = BROTLI_MAX_ALLOWED_DISTANCE - (bound[npostfix] - ndirect);
-    } else if (ndirect >= bound[npostfix] + postfix) {
-      max_distance = (3U << 29) - 4 + (ndirect - bound[npostfix]);
-    } else {
-      max_distance = BROTLI_MAX_ALLOWED_DISTANCE;
-    }
+    alphabet_size_limit = limit.max_alphabet_size;
+    max_distance = limit.max_distance;
   }
 
-  dist_params->alphabet_size = alphabet_size;
+  dist_params->alphabet_size_max = alphabet_size_max;
+  dist_params->alphabet_size_limit = alphabet_size_limit;
   dist_params->max_distance = max_distance;
 }
 
@@ -200,7 +196,7 @@ void BrotliBuildMetaBlock(MemoryManager* m,
     literal_context_multiplier = 1 << BROTLI_LITERAL_CONTEXT_BITS;
     literal_context_modes =
         BROTLI_ALLOC(m, ContextType, mb->literal_split.num_types);
-    if (BROTLI_IS_OOM(m)) return;
+    if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(literal_context_modes)) return;
     for (i = 0; i < mb->literal_split.num_types; ++i) {
       literal_context_modes[i] = literal_context_mode;
     }
@@ -210,21 +206,21 @@ void BrotliBuildMetaBlock(MemoryManager* m,
       mb->literal_split.num_types * literal_context_multiplier;
   literal_histograms =
       BROTLI_ALLOC(m, HistogramLiteral, literal_histograms_size);
-  if (BROTLI_IS_OOM(m)) return;
+  if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(literal_histograms)) return;
   ClearHistogramsLiteral(literal_histograms, literal_histograms_size);
 
   distance_histograms_size =
       mb->distance_split.num_types << BROTLI_DISTANCE_CONTEXT_BITS;
   distance_histograms =
       BROTLI_ALLOC(m, HistogramDistance, distance_histograms_size);
-  if (BROTLI_IS_OOM(m)) return;
+  if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(distance_histograms)) return;
   ClearHistogramsDistance(distance_histograms, distance_histograms_size);
 
   BROTLI_DCHECK(mb->command_histograms == 0);
   mb->command_histograms_size = mb->command_split.num_types;
   mb->command_histograms =
       BROTLI_ALLOC(m, HistogramCommand, mb->command_histograms_size);
-  if (BROTLI_IS_OOM(m)) return;
+  if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(mb->command_histograms)) return;
   ClearHistogramsCommand(mb->command_histograms, mb->command_histograms_size);
 
   BrotliBuildHistogramsWithContext(cmds, num_commands,
@@ -238,13 +234,13 @@ void BrotliBuildMetaBlock(MemoryManager* m,
       mb->literal_split.num_types << BROTLI_LITERAL_CONTEXT_BITS;
   mb->literal_context_map =
       BROTLI_ALLOC(m, uint32_t, mb->literal_context_map_size);
-  if (BROTLI_IS_OOM(m)) return;
+  if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(mb->literal_context_map)) return;
 
   BROTLI_DCHECK(mb->literal_histograms == 0);
   mb->literal_histograms_size = mb->literal_context_map_size;
   mb->literal_histograms =
       BROTLI_ALLOC(m, HistogramLiteral, mb->literal_histograms_size);
-  if (BROTLI_IS_OOM(m)) return;
+  if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(mb->literal_histograms)) return;
 
   BrotliClusterHistogramsLiteral(m, literal_histograms, literal_histograms_size,
       kMaxNumberOfHistograms, mb->literal_histograms,
@@ -269,13 +265,13 @@ void BrotliBuildMetaBlock(MemoryManager* m,
       mb->distance_split.num_types << BROTLI_DISTANCE_CONTEXT_BITS;
   mb->distance_context_map =
       BROTLI_ALLOC(m, uint32_t, mb->distance_context_map_size);
-  if (BROTLI_IS_OOM(m)) return;
+  if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(mb->distance_context_map)) return;
 
   BROTLI_DCHECK(mb->distance_histograms == 0);
   mb->distance_histograms_size = mb->distance_context_map_size;
   mb->distance_histograms =
       BROTLI_ALLOC(m, HistogramDistance, mb->distance_histograms_size);
-  if (BROTLI_IS_OOM(m)) return;
+  if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(mb->distance_histograms)) return;
 
   BrotliClusterHistogramsDistance(m, distance_histograms,
                                   mb->distance_context_map_size,
@@ -373,7 +369,7 @@ static void InitContextBlockSplitter(
   *histograms_size = max_num_types * num_contexts;
   *histograms = BROTLI_ALLOC(m, HistogramLiteral, *histograms_size);
   self->histograms_ = *histograms;
-  if (BROTLI_IS_OOM(m)) return;
+  if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(*histograms)) return;
   /* Clear only current histogram. */
   ClearHistogramsLiteral(&self->histograms_[0], num_contexts);
   self->last_histogram_ix_[0] = self->last_histogram_ix_[1] = 0;
@@ -423,7 +419,7 @@ static void ContextBlockSplitterFinishBlock(
     double combined_entropy[2 * BROTLI_MAX_STATIC_CONTEXTS];
     double diff[2] = { 0.0 };
     size_t i;
-    if (BROTLI_IS_OOM(m)) return;
+    if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(combined_histo)) return;
     for (i = 0; i < num_contexts; ++i) {
       size_t curr_histo_ix = self->curr_histogram_ix_ + i;
       size_t j;
@@ -527,7 +523,7 @@ static void MapStaticContexts(MemoryManager* m,
       mb->literal_split.num_types << BROTLI_LITERAL_CONTEXT_BITS;
   mb->literal_context_map =
       BROTLI_ALLOC(m, uint32_t, mb->literal_context_map_size);
-  if (BROTLI_IS_OOM(m)) return;
+  if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(mb->literal_context_map)) return;
 
   for (i = 0; i < mb->literal_split.num_types; ++i) {
     uint32_t offset = (uint32_t)(i * num_contexts);
diff --git a/modules/brotli/enc/metablock_inc.h b/modules/brotli/enc/metablock_inc.h
index dcc9d3c4a..ed507ef5e 100644
--- a/modules/brotli/enc/metablock_inc.h
+++ b/modules/brotli/enc/metablock_inc.h
@@ -71,7 +71,7 @@ static void FN(InitBlockSplitter)(
   *histograms_size = max_num_types;
   *histograms = BROTLI_ALLOC(m, HistogramType, *histograms_size);
   self->histograms_ = *histograms;
-  if (BROTLI_IS_OOM(m)) return;
+  if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(*histograms)) return;
   /* Clear only current histogram. */
   FN(HistogramClear)(&self->histograms_[0]);
   self->last_histogram_ix_[0] = self->last_histogram_ix_[1] = 0;
diff --git a/modules/brotli/enc/params.h b/modules/brotli/enc/params.h
index 6ecf1d3f9..54a7f0073 100644
--- a/modules/brotli/enc/params.h
+++ b/modules/brotli/enc/params.h
@@ -23,7 +23,8 @@ typedef struct BrotliHasherParams {
 typedef struct BrotliDistanceParams {
   uint32_t distance_postfix_bits;
   uint32_t num_direct_distance_codes;
-  uint32_t alphabet_size;
+  uint32_t alphabet_size_max;
+  uint32_t alphabet_size_limit;
   size_t max_distance;
 } BrotliDistanceParams;
 
@@ -33,6 +34,7 @@ typedef struct BrotliEncoderParams {
   int quality;
   int lgwin;
   int lgblock;
+  size_t stream_offset;
   size_t size_hint;
   BROTLI_BOOL disable_literal_context_modeling;
   BROTLI_BOOL large_window;
diff --git a/modules/brotli/enc/ringbuffer.h b/modules/brotli/enc/ringbuffer.h
index 86079a89d..8dce14803 100644
--- a/modules/brotli/enc/ringbuffer.h
+++ b/modules/brotli/enc/ringbuffer.h
@@ -75,7 +75,7 @@ static BROTLI_INLINE void RingBufferInitBuffer(
   uint8_t* new_data = BROTLI_ALLOC(
       m, uint8_t, 2 + buflen + kSlackForEightByteHashingEverywhere);
   size_t i;
-  if (BROTLI_IS_OOM(m)) return;
+  if (BROTLI_IS_OOM(m) || BROTLI_IS_NULL(new_data)) return;
   if (rb->data_) {
     memcpy(new_data, rb->data_,
         2 + rb->cur_size_ + kSlackForEightByteHashingEverywhere);
@@ -125,6 +125,9 @@ static BROTLI_INLINE void RingBufferWrite(
        later when we copy the last two bytes to the first two positions. */
     rb->buffer_[rb->size_ - 2] = 0;
     rb->buffer_[rb->size_ - 1] = 0;
+    /* Initialize tail; might be touched by "best_len++" optimization when
+       ring buffer is "full". */
+    rb->buffer_[rb->size_] = 241;
   }
   {
     const size_t masked_pos = rb->pos_ & rb->mask_;
diff --git a/modules/brotli/enc/utf8_util.c b/modules/brotli/enc/utf8_util.c
index 04a780516..e802b6a75 100644
--- a/modules/brotli/enc/utf8_util.c
+++ b/modules/brotli/enc/utf8_util.c
@@ -77,7 +77,7 @@ BROTLI_BOOL BrotliIsMostlyUTF8(
     i += bytes_read;
     if (symbol < 0x110000) size_utf8 += bytes_read;
   }
-  return TO_BROTLI_BOOL(size_utf8 > min_fraction * (double)length);
+  return TO_BROTLI_BOOL((double)size_utf8 > min_fraction * (double)length);
 }
 
 #if defined(__cplusplus) || defined(c_plusplus)
diff --git a/modules/brotli/enc/write_bits.h b/modules/brotli/enc/write_bits.h
index 36515a689..f6f88b45b 100644
--- a/modules/brotli/enc/write_bits.h
+++ b/modules/brotli/enc/write_bits.h
@@ -16,8 +16,6 @@
 extern "C" {
 #endif
 
-/*#define BIT_WRITER_DEBUG */
-
 /* This function writes bits into bytes in increasing addresses, and within
    a byte least-significant-bit first.
 
@@ -28,7 +26,7 @@ extern "C" {
 
    0000 0RRR    0000 0000    0000 0000
 
-   Now, we could write 5 or less bits in MSB by just sifting by 3
+   Now, we could write 5 or less bits in MSB by just shifting by 3
    and OR'ing to BYTE-0.
 
    For n bits, we take the last 5 bits, OR that with high bits in BYTE-0,
@@ -37,37 +35,41 @@ static BROTLI_INLINE void BrotliWriteBits(size_t n_bits,
                                           uint64_t bits,
                                           size_t* BROTLI_RESTRICT pos,
                                           uint8_t* BROTLI_RESTRICT array) {
+  BROTLI_LOG(("WriteBits  %2d  0x%08x%08x  %10d\n", (int)n_bits,
+      (uint32_t)(bits >> 32), (uint32_t)(bits & 0xFFFFFFFF),
+      (int)*pos));
+  BROTLI_DCHECK((bits >> n_bits) == 0);
+  BROTLI_DCHECK(n_bits <= 56);
 #if defined(BROTLI_LITTLE_ENDIAN)
   /* This branch of the code can write up to 56 bits at a time,
      7 bits are lost by being perhaps already in *p and at least
      1 bit is needed to initialize the bit-stream ahead (i.e. if 7
      bits are in *p and we write 57 bits, then the next write will
      access a byte that was never initialized). */
-  uint8_t* p = &array[*pos >> 3];
-  uint64_t v = (uint64_t)(*p);  /* Zero-extend 8 to 64 bits. */
-  BROTLI_LOG(("WriteBits  %2d  0x%08x%08x  %10d\n", (int)n_bits,
-      (uint32_t)(bits >> 32), (uint32_t)(bits & 0xFFFFFFFF),
-      (int)*pos));
-  BROTLI_DCHECK((bits >> n_bits) == 0);
-  BROTLI_DCHECK(n_bits <= 56);
-  v |= bits << (*pos & 7);
-  BROTLI_UNALIGNED_STORE64LE(p, v);  /* Set some bits. */
-  *pos += n_bits;
+  {
+    uint8_t* p = &array[*pos >> 3];
+    uint64_t v = (uint64_t)(*p);  /* Zero-extend 8 to 64 bits. */
+    v |= bits << (*pos & 7);
+    BROTLI_UNALIGNED_STORE64LE(p, v);  /* Set some bits. */
+    *pos += n_bits;
+  }
 #else
   /* implicit & 0xFF is assumed for uint8_t arithmetics */
-  uint8_t* array_pos = &array[*pos >> 3];
-  const size_t bits_reserved_in_first_byte = (*pos & 7);
-  size_t bits_left_to_write;
-  bits <<= bits_reserved_in_first_byte;
-  *array_pos++ |= (uint8_t)bits;
-  for (bits_left_to_write = n_bits + bits_reserved_in_first_byte;
-       bits_left_to_write >= 9;
-       bits_left_to_write -= 8) {
-    bits >>= 8;
-    *array_pos++ = (uint8_t)bits;
+  {
+    uint8_t* array_pos = &array[*pos >> 3];
+    const size_t bits_reserved_in_first_byte = (*pos & 7);
+    size_t bits_left_to_write;
+    bits <<= bits_reserved_in_first_byte;
+    *array_pos++ |= (uint8_t)bits;
+    for (bits_left_to_write = n_bits + bits_reserved_in_first_byte;
+         bits_left_to_write >= 9;
+         bits_left_to_write -= 8) {
+      bits >>= 8;
+      *array_pos++ = (uint8_t)bits;
+    }
+    *array_pos = 0;
+    *pos += n_bits;
   }
-  *array_pos = 0;
-  *pos += n_bits;
 #endif
 }
 
diff --git a/modules/brotli/include/brotli/encode.h b/modules/brotli/include/brotli/encode.h
index 0ced7e55b..b2774cb63 100644
--- a/modules/brotli/include/brotli/encode.h
+++ b/modules/brotli/include/brotli/encode.h
@@ -201,7 +201,23 @@ typedef enum BrotliEncoderParameter {
    *
    * Range is from 0 to (15 << NPOSTFIX) in steps of (1 << NPOSTFIX).
    */
-  BROTLI_PARAM_NDIRECT = 8
+  BROTLI_PARAM_NDIRECT = 8,
+  /**
+   * Number of bytes of input stream already processed by a different instance.
+   *
+   * @note It is important to configure all the encoder instances with same
+   *       parameters (except this one) in order to allow all the encoded parts
+   *       obey the same restrictions implied by header.
+   *
+   * If offset is not 0, then stream header is omitted.
+   * In any case output start is byte aligned, so for proper streams stitching
+   * "predecessor" stream must be flushed.
+   *
+   * Range is not artificially limited, but all the values greater or equal to
+   * maximal window size have the same effect. Values greater than 2**30 are not
+   * allowed.
+   */
+  BROTLI_PARAM_STREAM_OFFSET = 9
 } BrotliEncoderParameter;
 
 /**
@@ -274,6 +290,11 @@ BROTLI_ENC_API size_t BrotliEncoderMaxCompressedSize(size_t input_size);
  * @note If ::BrotliEncoderMaxCompressedSize(@p input_size) returns non-zero
  *       value, then output is guaranteed to be no longer than that.
  *
+ * @note If @p lgwin is greater than ::BROTLI_MAX_WINDOW_BITS then resulting
+ *       stream might be incompatible with RFC 7932; to decode such streams,
+ *       decoder should be configured with
+ *       ::BROTLI_DECODER_PARAM_LARGE_WINDOW = @c 1
+ *
  * @param quality quality parameter value, e.g. ::BROTLI_DEFAULT_QUALITY
  * @param lgwin lgwin parameter value, e.g. ::BROTLI_DEFAULT_WINDOW
  * @param mode mode parameter value, e.g. ::BROTLI_DEFAULT_MODE
diff --git a/modules/brotli/include/brotli/port.h b/modules/brotli/include/brotli/port.h
index 20dc2314d..825237a33 100644
--- a/modules/brotli/include/brotli/port.h
+++ b/modules/brotli/include/brotli/port.h
@@ -218,6 +218,20 @@
   BROTLI_GNUC_VERSION_CHECK(major, minor, patch)
 #endif
 
+#if defined(__has_feature)
+#define BROTLI_HAS_FEATURE(feature) __has_feature(feature)
+#else
+#define BROTLI_HAS_FEATURE(feature) (0)
+#endif
+
+#if defined(ADDRESS_SANITIZER) || BROTLI_HAS_FEATURE(address_sanitizer) || \
+    defined(THREAD_SANITIZER) || BROTLI_HAS_FEATURE(thread_sanitizer) ||   \
+    defined(MEMORY_SANITIZER) || BROTLI_HAS_FEATURE(memory_sanitizer)
+#define BROTLI_SANITIZED 1
+#else
+#define BROTLI_SANITIZED 0
+#endif
+
 #if defined(_WIN32) || defined(__CYGWIN__)
 #define BROTLI_PUBLIC
 #elif BROTLI_GNUC_VERSION_CHECK(3, 3, 0) ||                         \
diff --git a/modules/brotli/moz.build b/modules/brotli/moz.build
index 6754d0317..3dec54a48 100644
--- a/modules/brotli/moz.build
+++ b/modules/brotli/moz.build
@@ -15,7 +15,10 @@ EXPORTS.brotli += [
 ]
 
 SOURCES += [
+    'common/constants.c',
+    'common/context.c',
     'common/dictionary.c',
+    'common/platform.c',
     'common/transform.c',
     'dec/bit_reader.c',
     'dec/decode.c',
@@ -45,12 +48,14 @@ HOST_SOURCES += [
     'enc/block_splitter.c',
     'enc/brotli_bit_stream.c',
     'enc/cluster.c',
+    'enc/command.c',
     'enc/compress_fragment.c',
     'enc/compress_fragment_two_pass.c',
     'enc/dictionary_hash.c',
     'enc/encode.c',
     'enc/encoder_dict.c',
     'enc/entropy_encode.c',
+    'enc/fast_log.c',
     'enc/histogram.c',
     'enc/literal_cost.c',
     'enc/memory.c',
diff --git a/modules/brotli/tools/brotli.c b/modules/brotli/tools/brotli.c
index ce05b641b..7c678d3d8 100644
--- a/modules/brotli/tools/brotli.c
+++ b/modules/brotli/tools/brotli.c
@@ -6,6 +6,11 @@
 
 /* Command line interface for Brotli library. */
 
+/* Mute strerror/strcpy warnings. */
+#if !defined(_CRT_SECURE_NO_WARNINGS)
+#define _CRT_SECURE_NO_WARNINGS
+#endif
+
 #include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
@@ -86,10 +91,10 @@ typedef struct {
   /* Parameters */
   int quality;
   int lgwin;
+  int verbosity;
   BROTLI_BOOL force_overwrite;
   BROTLI_BOOL junk_source;
   BROTLI_BOOL copy_stat;
-  BROTLI_BOOL verbose;
   BROTLI_BOOL write_to_stdout;
   BROTLI_BOOL test_integrity;
   BROTLI_BOOL decompress;
@@ -121,6 +126,12 @@ typedef struct {
   const uint8_t* next_in;
   size_t available_out;
   uint8_t* next_out;
+
+  /* Reporting */
+  /* size_t would be large enough,
+     until 4GiB+ files are compressed / decompressed on 32-bit CPUs. */
+  size_t total_in;
+  size_t total_out;
 } Context;
 
 /* Parse up to 5 decimal digits. */
@@ -257,7 +268,7 @@ static Command ParseParams(Context* params) {
           return COMMAND_HELP;
         } else if (c == 'j' || c == 'k') {
           if (keep_set) {
-            fprintf(stderr, "argument --rm / -j or --keep / -n already set\n");
+            fprintf(stderr, "argument --rm / -j or --keep / -k already set\n");
             return COMMAND_INVALID;
           }
           keep_set = BROTLI_TRUE;
@@ -279,11 +290,11 @@ static Command ParseParams(Context* params) {
           command = COMMAND_TEST_INTEGRITY;
           continue;
         } else if (c == 'v') {
-          if (params->verbose) {
+          if (params->verbosity > 0) {
             fprintf(stderr, "argument --verbose / -v already set\n");
             return COMMAND_INVALID;
           }
-          params->verbose = BROTLI_TRUE;
+          params->verbosity = 1;
           continue;
         } else if (c == 'V') {
           /* Don't parse further. */
@@ -382,7 +393,7 @@ static Command ParseParams(Context* params) {
         return COMMAND_HELP;
       } else if (strcmp("keep", arg) == 0) {
         if (keep_set) {
-          fprintf(stderr, "argument --rm / -j or --keep / -n already set\n");
+          fprintf(stderr, "argument --rm / -j or --keep / -k already set\n");
           return COMMAND_INVALID;
         }
         keep_set = BROTLI_TRUE;
@@ -395,7 +406,7 @@ static Command ParseParams(Context* params) {
         params->copy_stat = BROTLI_FALSE;
       } else if (strcmp("rm", arg) == 0) {
         if (keep_set) {
-          fprintf(stderr, "argument --rm / -j or --keep / -n already set\n");
+          fprintf(stderr, "argument --rm / -j or --keep / -k already set\n");
           return COMMAND_INVALID;
         }
         keep_set = BROTLI_TRUE;
@@ -415,11 +426,11 @@ static Command ParseParams(Context* params) {
         command_set = BROTLI_TRUE;
         command = COMMAND_TEST_INTEGRITY;
       } else if (strcmp("verbose", arg) == 0) {
-        if (params->verbose) {
+        if (params->verbosity > 0) {
           fprintf(stderr, "argument --verbose / -v already set\n");
           return COMMAND_INVALID;
         }
-        params->verbose = BROTLI_TRUE;
+        params->verbosity = 1;
       } else if (strcmp("version", arg) == 0) {
         /* Don't parse further. */
         return COMMAND_VERSION;
@@ -550,11 +561,17 @@ static void PrintHelp(const char* name, BROTLI_BOOL error) {
 "  -t, --test                  test compressed file integrity\n"
 "  -v, --verbose               verbose mode\n");
   fprintf(media,
-"  -w NUM, --lgwin=NUM         set LZ77 window size (0, %d-%d)\n",
+"  -w NUM, --lgwin=NUM         set LZ77 window size (0, %d-%d)\n"
+"                              window size = 2**NUM - 16\n"
+"                              0 lets compressor choose the optimal value\n",
           BROTLI_MIN_WINDOW_BITS, BROTLI_MAX_WINDOW_BITS);
   fprintf(media,
-"                              window size = 2**NUM - 16\n"
-"                              0 lets compressor choose the optimal value\n");
+"  --large_window=NUM          use incompatible large-window brotli\n"
+"                              bitstream with window size (0, %d-%d)\n"
+"                              WARNING: this format is not compatible\n"
+"                              with brotli RFC 7932 and may not be\n"
+"                              decodable with regular brotli decoders\n",
+          BROTLI_MIN_WINDOW_BITS, BROTLI_LARGE_MAX_WINDOW_BITS);
   fprintf(media,
 "  -S SUF, --suffix=SUF        output file suffix (default:'%s')\n",
           DEFAULT_SUFFIX);
@@ -787,8 +804,12 @@ static void InitializeBuffers(Context* context) {
   context->next_in = NULL;
   context->available_out = kFileBufferSize;
   context->next_out = context->output;
+  context->total_in = 0;
+  context->total_out = 0;
 }
 
+/* This method might give the false-negative result.
+   However, after an empty / incomplete read it should tell the truth. */
 static BROTLI_BOOL HasMoreInput(Context* context) {
   return feof(context->fin) ? BROTLI_FALSE : BROTLI_TRUE;
 }
@@ -796,6 +817,7 @@ static BROTLI_BOOL HasMoreInput(Context* context) {
 static BROTLI_BOOL ProvideInput(Context* context) {
   context->available_in =
       fread(context->input, 1, kFileBufferSize, context->fin);
+  context->total_in += context->available_in;
   context->next_in = context->input;
   if (ferror(context->fin)) {
     fprintf(stderr, "failed to read input [%s]: %s\n",
@@ -808,6 +830,7 @@ static BROTLI_BOOL ProvideInput(Context* context) {
 /* Internal: should be used only in Provide-/Flush-Output. */
 static BROTLI_BOOL WriteOutput(Context* context) {
   size_t out_size = (size_t)(context->next_out - context->output);
+  context->total_out += out_size;
   if (out_size == 0) return BROTLI_TRUE;
   if (context->test_integrity) return BROTLI_TRUE;
 
@@ -833,6 +856,25 @@ static BROTLI_BOOL FlushOutput(Context* context) {
   return BROTLI_TRUE;
 }
 
+static void PrintBytes(size_t value) {
+  if (value < 1024) {
+    fprintf(stderr, "%d B", (int)value);
+  } else if (value < 1048576) {
+    fprintf(stderr, "%0.3f KiB", (double)value / 1024.0);
+  } else if (value < 1073741824) {
+    fprintf(stderr, "%0.3f MiB", (double)value / 1048576.0);
+  } else {
+    fprintf(stderr, "%0.3f GiB", (double)value / 1073741824.0);
+  }
+}
+
+static void PrintFileProcessingProgress(Context* context) {
+  fprintf(stderr, "[%s]: ", PrintablePath(context->current_input_path));
+  PrintBytes(context->total_in);
+  fprintf(stderr, " -> ");
+  PrintBytes(context->total_out);
+}
+
 static BROTLI_BOOL DecompressFile(Context* context, BrotliDecoderState* s) {
   BrotliDecoderResult result = BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT;
   InitializeBuffers(context);
@@ -848,11 +890,18 @@ static BROTLI_BOOL DecompressFile(Context* context, BrotliDecoderState* s) {
       if (!ProvideOutput(context)) return BROTLI_FALSE;
     } else if (result == BROTLI_DECODER_RESULT_SUCCESS) {
       if (!FlushOutput(context)) return BROTLI_FALSE;
-      if (context->available_in != 0 || HasMoreInput(context)) {
+      int has_more_input =
+          (context->available_in != 0) || (fgetc(context->fin) != EOF);
+      if (has_more_input) {
         fprintf(stderr, "corrupt input [%s]\n",
                 PrintablePath(context->current_input_path));
         return BROTLI_FALSE;
       }
+      if (context->verbosity > 0) {
+        fprintf(stderr, "Decompressed ");
+        PrintFileProcessingProgress(context);
+        fprintf(stderr, "\n");
+      }
       return BROTLI_TRUE;
     } else {
       fprintf(stderr, "corrupt input [%s]\n",
@@ -915,7 +964,13 @@ static BROTLI_BOOL CompressFile(Context* context, BrotliEncoderState* s) {
     }
 
     if (BrotliEncoderIsFinished(s)) {
-      return FlushOutput(context);
+      if (!FlushOutput(context)) return BROTLI_FALSE;
+      if (context->verbosity > 0) {
+        fprintf(stderr, "Compressed ");
+        PrintFileProcessingProgress(context);
+        fprintf(stderr, "\n");
+      }
+      return BROTLI_TRUE;
     }
   }
 }
@@ -979,11 +1034,11 @@ int main(int argc, char** argv) {
 
   context.quality = 11;
   context.lgwin = -1;
+  context.verbosity = 0;
   context.force_overwrite = BROTLI_FALSE;
   context.junk_source = BROTLI_FALSE;
   context.copy_stat = BROTLI_TRUE;
   context.test_integrity = BROTLI_FALSE;
-  context.verbose = BROTLI_FALSE;
   context.write_to_stdout = BROTLI_FALSE;
   context.decompress = BROTLI_FALSE;
   context.large_window = BROTLI_FALSE;
diff --git a/modules/brotli/update.sh b/modules/brotli/update.sh
index 4a98ce6a7..72717c998 100755
--- a/modules/brotli/update.sh
+++ b/modules/brotli/update.sh
@@ -6,7 +6,7 @@
 MY_TEMP_DIR=`mktemp -d -t brotli_update.XXXXXX` || exit 1
 
 git clone https://github.com/google/brotli ${MY_TEMP_DIR}/brotli
-git -C ${MY_TEMP_DIR}/brotli checkout v1.0.7
+git -C ${MY_TEMP_DIR}/brotli checkout v1.0.9
 
 COMMIT=$(git -C ${MY_TEMP_DIR}/brotli rev-parse HEAD)
 perl -p -i -e "s/\[commit [0-9a-f]{40}\]/[commit ${COMMIT}]/" README.mozilla;
diff --git a/modules/freetype2/src/sfnt/pngshim.c b/modules/freetype2/src/sfnt/pngshim.c
index 16020266a..1c2ce83df 100644
--- a/modules/freetype2/src/sfnt/pngshim.c
+++ b/modules/freetype2/src/sfnt/pngshim.c
@@ -327,6 +327,13 @@
 
     if ( populate_map_and_metrics )
     {
+      /* reject too large bitmaps similarly to the rasterizer */
+      if ( map->rows > 0x7FFF || map->width > 0x7FFF )
+      {
+        error = FT_THROW( Array_Too_Large );
+        goto DestroyExit;
+      }
+
       metrics->width  = (FT_UShort)imgWidth;
       metrics->height = (FT_UShort)imgHeight;
 
@@ -335,13 +342,6 @@
       map->pixel_mode = FT_PIXEL_MODE_BGRA;
       map->pitch      = (int)( map->width * 4 );
       map->num_grays  = 256;
-
-      /* reject too large bitmaps similarly to the rasterizer */
-      if ( map->rows > 0x7FFF || map->width > 0x7FFF )
-      {
-        error = FT_THROW( Array_Too_Large );
-        goto DestroyExit;
-      }
     }
 
     /* convert palette/gray image to rgb */
diff --git a/modules/libjar/nsJARInputStream.cpp b/modules/libjar/nsJARInputStream.cpp
index 6993dd578..a1f6c1d56 100644
--- a/modules/libjar/nsJARInputStream.cpp
+++ b/modules/libjar/nsJARInputStream.cpp
@@ -7,6 +7,7 @@
 
 #include "nsJARInputStream.h"
 #include "zipstruct.h"         // defines ZIP compression codes
+#include "brotli/decode.h"
 #include "nsZipArchive.h"
 
 #include "nsEscape.h"
@@ -51,6 +52,13 @@ nsJARInputStream::InitFile(nsJAR *aJar, nsZipItem *item)
            mOutCrc = crc32(0L, Z_NULL, 0);
            break;
 
+       case MOZ_JAR_BROTLI:
+           mBrotliState = BrotliDecoderCreateInstance(nullptr, nullptr, nullptr);
+           mMode = MODE_BROTLI;
+           mInCrc = item->CRC32();
+           mOutCrc = crc32(0L, Z_NULL, 0);
+           break;
+
        default:
            return NS_ERROR_NOT_IMPLEMENTED;
     }
@@ -166,6 +174,7 @@ nsJARInputStream::Available(uint64_t *_retval)
         break;
 
       case MODE_INFLATE:
+      case MODE_BROTLI:
       case MODE_COPY:
         *_retval = mOutSize - mZs.total_out;
         break;
@@ -195,7 +204,8 @@ MOZ_WIN_MEM_TRY_BEGIN
         return ReadDirectory(aBuffer, aCount, aBytesRead);
 
       case MODE_INFLATE:
-        if (mFd) {
+      case MODE_BROTLI:
+        if (mZs.total_out < mOutSize) {
           rv = ContinueInflate(aBuffer, aCount, aBytesRead);
         }
         // be aggressive about releasing the file!
@@ -246,6 +256,9 @@ nsJARInputStream::Close()
     if (mMode == MODE_INFLATE) {
         inflateEnd(&mZs);
     }
+    if (mMode == MODE_BROTLI) {
+        BrotliDecoderDestroyInstance(mBrotliState);
+    }
     mMode = MODE_CLOSED;
     mFd = nullptr;
     return NS_OK;
@@ -255,6 +268,8 @@ nsresult
 nsJARInputStream::ContinueInflate(char* aBuffer, uint32_t aCount,
                                   uint32_t* aBytesRead)
 {
+    bool finished = false;
+
     // No need to check the args, ::Read did that, but assert them at least
     NS_ASSERTION(aBuffer,"aBuffer parameter must not be null");
     NS_ASSERTION(aBytesRead,"aBytesRead parameter must not be null");
@@ -266,11 +281,35 @@ nsJARInputStream::ContinueInflate(char* aBuffer, uint32_t aCount,
     mZs.avail_out = std::min(aCount, (mOutSize-oldTotalOut));
     mZs.next_out = (unsigned char*)aBuffer;
 
-    // now inflate
-    int zerr = inflate(&mZs, Z_SYNC_FLUSH);
-    if ((zerr != Z_OK) && (zerr != Z_STREAM_END)) {
-        nsZipArchive::sFileCorruptedReason = "nsJARInputStream: error while inflating";
-        return NS_ERROR_FILE_CORRUPTED;
+    if (mMode == MODE_INFLATE) {
+        // now inflate
+        int zerr = inflate(&mZs, Z_SYNC_FLUSH);
+        if ((zerr != Z_OK) && (zerr != Z_STREAM_END)) {
+            nsZipArchive::sFileCorruptedReason = "nsJARInputStream: error while inflating";
+            return NS_ERROR_FILE_CORRUPTED;
+        }
+        finished = (zerr == Z_STREAM_END);
+    } else {
+        MOZ_ASSERT(mMode == MODE_BROTLI);
+        /* The brotli library wants size_t, but z_stream only contains
+         * unsigned int for avail_* and unsigned long for total_*.
+         * So use temporary stack values. */
+        size_t avail_in = mZs.avail_in;
+        size_t avail_out = mZs.avail_out;
+        size_t total_out = mZs.total_out;
+        BrotliDecoderResult result = BrotliDecoderDecompressStream(
+            mBrotliState,
+            &avail_in, const_cast<const unsigned char**>(&mZs.next_in),
+            &avail_out, &mZs.next_out, &total_out);
+        /* We don't need to update avail_out, it's not used outside this
+         * function. */
+        mZs.total_out = total_out;
+        mZs.avail_in = avail_in;
+        if (result == BROTLI_DECODER_RESULT_ERROR) {
+            nsZipArchive::sFileCorruptedReason = "nsJARInputStream: brotli decompression error";
+            return NS_ERROR_FILE_CORRUPTED;
+        }
+        finished = (result == BROTLI_DECODER_RESULT_SUCCESS);
     }
 
     *aBytesRead = (mZs.total_out - oldTotalOut);
@@ -280,8 +319,10 @@ nsJARInputStream::ContinueInflate(char* aBuffer, uint32_t aCount,
 
     // be aggressive about ending the inflation
     // for some reason we don't always get Z_STREAM_END
-    if (zerr == Z_STREAM_END || mZs.total_out == mOutSize) {
-        inflateEnd(&mZs);
+    if (finished || mZs.total_out == mOutSize) {
+        if (mMode == MODE_INFLATE) {
+            inflateEnd(&mZs);
+        }
 
         // stop returning valid data as soon as we know we have a bad CRC
         if (mOutCrc != mInCrc) {
diff --git a/modules/libjar/nsJARInputStream.h b/modules/libjar/nsJARInputStream.h
index 1c396aa10..60c3d763e 100644
--- a/modules/libjar/nsJARInputStream.h
+++ b/modules/libjar/nsJARInputStream.h
@@ -12,6 +12,8 @@
 #include "nsTArray.h"
 #include "mozilla/Attributes.h"
 
+struct BrotliDecoderStateStruct;
+
 /*-------------------------------------------------------------------------
  * Class nsJARInputStream declaration. This class defines the type of the
  * object returned by calls to nsJAR::GetInputStream(filename) for the
@@ -20,9 +22,15 @@
 class nsJARInputStream final : public nsIInputStream
 {
   public:
-    nsJARInputStream() : 
-        mOutSize(0), mInCrc(0), mOutCrc(0), mNameLen(0),
-        mCurPos(0), mArrPos(0), mMode(MODE_NOTINITED)
+    nsJARInputStream()
+    : mOutSize(0)
+    , mInCrc(0)
+    , mOutCrc(0)
+    , mBrotliState(nullptr)
+    , mNameLen(0)
+    , mCurPos(0)
+    , mArrPos(0)
+    , mMode(MODE_NOTINITED)
     { 
       memset(&mZs, 0, sizeof(z_stream));
     }
@@ -45,6 +53,7 @@ class nsJARInputStream final : public nsIInputStream
     uint32_t               mInCrc;      // CRC as provided by the zipentry
     uint32_t               mOutCrc;     // CRC as calculated by me
     z_stream               mZs;         // zip data structure
+    BrotliDecoderStateStruct* mBrotliState; // Brotli decoder state
 
     /* For directory reading */
     RefPtr<nsJAR>          mJar;        // string reference to zipreader
@@ -59,6 +68,7 @@ class nsJARInputStream final : public nsIInputStream
         MODE_CLOSED,
         MODE_DIRECTORY,
         MODE_INFLATE,
+        MODE_BROTLI,
         MODE_COPY
     } JISMode;
 
diff --git a/modules/libjar/nsZipArchive.cpp b/modules/libjar/nsZipArchive.cpp
index 2f12af5f0..b28fddc18 100644
--- a/modules/libjar/nsZipArchive.cpp
+++ b/modules/libjar/nsZipArchive.cpp
@@ -4,7 +4,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 /*
- * This module implements a simple archive extractor for the PKZIP format.
+ * This module implements a simple archive extractor.
  *
  * The underlying nsZipArchive is NOT thread-safe. Do not pass references
  * or pointers to it across thread boundaries.
@@ -17,6 +17,7 @@
 
 #define READTYPE  int32_t
 #include "zlib.h"
+#include "brotli/decode.h"
 #include "nsISupportsUtils.h"
 #include "prio.h"
 #include "plstr.h"
@@ -1186,6 +1187,7 @@ nsZipCursor::nsZipCursor(nsZipItem *item, nsZipArchive *aZip, uint8_t* aBuf,
   : mItem(item)
   , mBuf(aBuf)
   , mBufSize(aBufSize)
+  , mBrotliState(nullptr)
   , mCRC(0)
   , mDoCRC(doCRC)
 {
@@ -1200,6 +1202,10 @@ nsZipCursor::nsZipCursor(nsZipItem *item, nsZipArchive *aZip, uint8_t* aBuf,
   
   mZs.avail_in = item->Size();
   mZs.next_in = (Bytef*)aZip->GetData(item);
+
+  if (mItem->Compression() == MOZ_JAR_BROTLI) {
+    mBrotliState = BrotliDecoderCreateInstance(nullptr, nullptr, nullptr);
+  }
   
   if (doCRC)
     mCRC = crc32(0L, Z_NULL, 0);
@@ -1210,6 +1216,9 @@ nsZipCursor::~nsZipCursor()
   if (mItem->Compression() == DEFLATED) {
     inflateEnd(&mZs);
   }
+  if (mItem->Compression() == MOZ_JAR_BROTLI) {
+    BrotliDecoderDestroyInstance(mBrotliState);
+  }
 }
 
 uint8_t* nsZipCursor::ReadOrCopy(uint32_t *aBytesRead, bool aCopy) {
@@ -1246,6 +1255,29 @@ MOZ_WIN_MEM_TRY_BEGIN
     *aBytesRead = mZs.next_out - buf;
     verifyCRC = (zerr == Z_STREAM_END);
     break;
+  case MOZ_JAR_BROTLI: {
+    buf = mBuf;
+    mZs.next_out = buf;
+    /* The brotli library wants size_t, but z_stream only contains
+     * unsigned int for avail_*. So use temporary stack values. */
+    size_t avail_out = mBufSize;
+    size_t avail_in = mZs.avail_in;
+    BrotliDecoderResult result = BrotliDecoderDecompressStream(
+      mBrotliState,
+      &avail_in, const_cast<const unsigned char**>(&mZs.next_in),
+      &avail_out, &mZs.next_out, nullptr);
+    /* We don't need to update avail_out, it's not used outside this
+     * function. */
+    mZs.avail_in = avail_in;
+
+    if (result == BROTLI_DECODER_RESULT_ERROR) {
+      return nullptr;
+    }
+
+    *aBytesRead = mZs.next_out - buf;
+    verifyCRC = (result == BROTLI_DECODER_RESULT_SUCCESS);
+    break;
+  }
   default:
     return nullptr;
   }
@@ -1272,7 +1304,9 @@ nsZipItemPtr_base::nsZipItemPtr_base(nsZipArchive *aZip,
     return;
 
   uint32_t size = 0;
-  if (item->Compression() == DEFLATED) {
+  bool compressed = (item->Compression() == DEFLATED) ||
+                    (item->Compression() == MOZ_JAR_BROTLI);
+  if (compressed) {
     size = item->RealSize();
     mAutoBuf = MakeUniqueFallible<uint8_t[]>(size);
     if (!mAutoBuf) {
diff --git a/modules/libjar/nsZipArchive.h b/modules/libjar/nsZipArchive.h
index 2de679032..6b758c9fd 100644
--- a/modules/libjar/nsZipArchive.h
+++ b/modules/libjar/nsZipArchive.h
@@ -37,6 +37,7 @@
 
 class nsZipFind;
 struct PRFileDesc;
+struct BrotliDecoderStateStruct;
 
 /**
  * This file defines some of the basic structures used by libjar to
@@ -314,6 +315,7 @@ private:
   uint8_t  *mBuf; 
   uint32_t  mBufSize; 
   z_stream  mZs;
+  BrotliDecoderStateStruct* mBrotliState;
   uint32_t mCRC;
   bool mDoCRC;
 };
diff --git a/modules/libjar/zipstruct.h b/modules/libjar/zipstruct.h
index f06afe14e..f7393128a 100644
--- a/modules/libjar/zipstruct.h
+++ b/modules/libjar/zipstruct.h
@@ -102,6 +102,7 @@ typedef struct ZipEnd_
 #define TOKENIZED         7
 #define DEFLATED          8
 #define UNSUPPORTED       0xFF
-
+/* non-standard extension */
+#define MOZ_JAR_BROTLI    0x81
 
 #endif /* _zipstruct_h */
diff --git a/modules/libpref/init/all.js b/modules/libpref/init/all.js
index bed6d0d01..9f1880668 100644
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -23,7 +23,7 @@ pref("keyword.enabled", false);
 pref("general.useragent.locale", "chrome://global/locale/intl.properties");
 pref("general.useragent.compatMode.gecko", false);
 pref("general.useragent.compatMode.firefox", false);
-pref("general.useragent.compatMode.version", "68.9");
+pref("general.useragent.compatMode.version", "68.0");
 pref("general.useragent.appVersionIsBuildID", false);
 
 // This pref exists only for testing purposes. In order to disable all
@@ -4741,10 +4741,6 @@ pref("dom.event.handling-user-input-time-limit", 1000);
 // Whether we should layerize all animated images (if otherwise possible).
 pref("layout.animated-image-layers.enabled", false);
 
-pref("dom.vibrator.enabled", true);
-pref("dom.vibrator.max_vibrate_ms", 10000);
-pref("dom.vibrator.max_vibrate_list_len", 128);
-
 // Abort API
 pref("dom.abortController.enabled", true);
 
@@ -5411,8 +5407,8 @@ pref("osfile.reset_worker_delay", 30000);
 #endif
 
 #if !defined(MOZ_WIDGET_ANDROID)
-pref("dom.webkitBlink.dirPicker.enabled", true);
-pref("dom.webkitBlink.filesystem.enabled", true);
+pref("dom.webkitBlink.dirPicker.enabled", false);
+pref("dom.webkitBlink.filesystem.enabled", false);
 #endif
 
 #ifdef NIGHTLY_BUILD
diff --git a/netwerk/protocol/http/Http2Session.cpp b/netwerk/protocol/http/Http2Session.cpp
index 726b39f74..3dc79c854 100644
--- a/netwerk/protocol/http/Http2Session.cpp
+++ b/netwerk/protocol/http/Http2Session.cpp
@@ -3532,17 +3532,18 @@ Http2Session::UnRegisterTunnel(Http2Stream *aTunnel)
 }
 
 void
-Http2Session::CreateTunnel(nsHttpTransaction *trans,
-                           nsHttpConnectionInfo *ci,
-                           nsIInterfaceRequestor *aCallbacks)
+Http2Session::CreateTunnel(nsHttpTransaction* trans,
+                           nsHttpConnectionInfo* ci,
+                           nsIInterfaceRequestor* aCallbacks)
 {
   LOG(("Http2Session::CreateTunnel %p %p make new tunnel\n", this, trans));
   // The connect transaction will hold onto the underlying http
   // transaction so that an auth created by the connect can be mappped
   // to the correct security callbacks
 
+  RefPtr<nsHttpConnectionInfo> clone(ci->Clone());
   RefPtr<SpdyConnectTransaction> connectTrans =
-    new SpdyConnectTransaction(ci, aCallbacks, trans->Caps(), trans, this);
+    new SpdyConnectTransaction(clone, aCallbacks, trans->Caps(), trans, this);
   AddStream(connectTrans, nsISupportsPriority::PRIORITY_NORMAL, false, nullptr);
   Http2Stream *tunnel = mStreamTransactionHash.Get(connectTrans);
   MOZ_ASSERT(tunnel);
diff --git a/netwerk/protocol/http/nsHttpTransaction.cpp b/netwerk/protocol/http/nsHttpTransaction.cpp
index 76e0a4ad9..e7f3ca0ef 100644
--- a/netwerk/protocol/http/nsHttpTransaction.cpp
+++ b/netwerk/protocol/http/nsHttpTransaction.cpp
@@ -2030,9 +2030,9 @@ nsHttpTransaction::DisableSpdy()
 {
     mCaps |= NS_HTTP_DISALLOW_SPDY;
     if (mConnInfo) {
-        // This is our clone of the connection info, not the persistent one that
-        // is owned by the connection manager, so we're safe to change this here
-        mConnInfo->SetNoSpdy(true);
+        RefPtr<nsHttpConnectionInfo> connInfo = mConnInfo->Clone();
+        connInfo->SetNoSpdy(true);
+        mConnInfo.swap(connInfo);
     }
 }
 
diff --git a/nsprpub/pr/src/linking/prlink.c b/nsprpub/pr/src/linking/prlink.c
index 1f3430714..4e73d9df1 100644
--- a/nsprpub/pr/src/linking/prlink.c
+++ b/nsprpub/pr/src/linking/prlink.c
@@ -776,6 +776,9 @@ pr_LoadLibraryByPathname(const char *name, PRIntn flags)
         int dl_flags = 0;
 #endif
         void *h = NULL;
+#if defined(DARWIN)
+        PRBool okToLoad = PR_FALSE;
+#endif
 
         if (flags & PR_LD_LAZY) {
             dl_flags |= RTLD_LAZY;
@@ -790,12 +793,36 @@ pr_LoadLibraryByPathname(const char *name, PRIntn flags)
             dl_flags |= RTLD_LOCAL;
         }
 #if defined(DARWIN)
-        /* ensure the file exists if it contains a slash character i.e. path */
-        /* DARWIN's dlopen ignores the provided path and checks for the */
-        /* plain filename in DYLD_LIBRARY_PATH */
-        if (strchr(name, PR_DIRECTORY_SEPARATOR) == NULL ||
-            PR_Access(name, PR_ACCESS_EXISTS) == PR_SUCCESS) {
-            h = dlopen(name, dl_flags);
+        /* If the file contains an absolute or relative path (slash)
+         * and the path doesn't look like a System path, then require
+         * the file exists.
+         * The reason is that DARWIN's dlopen ignores the provided path
+         * and checks for the plain filename in DYLD_LIBRARY_PATH,
+         * which could load an unexpected version of a library. */
+        if (strchr(name, PR_DIRECTORY_SEPARATOR) == NULL) {
+          /* no slash, allow to load from any location */
+          okToLoad = PR_TRUE;
+        } else {
+          const char systemPrefix1[] = "/System/";
+          const size_t systemPrefixLen1 = strlen(systemPrefix1);
+          const char systemPrefix2[] = "/usr/lib/";
+          const size_t systemPrefixLen2 = strlen(systemPrefix2);
+          const name_len = strlen(name);
+          if (((name_len > systemPrefixLen1) &&
+               (strncmp(name, systemPrefix1, systemPrefixLen1) == 0)) ||
+             ((name_len > systemPrefixLen2) &&
+               (strncmp(name, systemPrefix2, systemPrefixLen2) == 0))) {
+            /* found at beginning, it's a system library.
+             * Skip filesystem check (required for macOS 11),
+             * allow loading from any location */
+            okToLoad = PR_TRUE;
+          } else if (PR_Access(name, PR_ACCESS_EXISTS) == PR_SUCCESS) {
+            /* file exists, allow to load */
+            okToLoad = PR_TRUE;
+          }
+        }
+        if (okToLoad) {
+          h = dlopen(name, dl_flags);
         }
 #else
         h = dlopen(name, dl_flags);
diff --git a/old-configure.in b/old-configure.in
index d34f72204..ade675e95 100644
--- a/old-configure.in
+++ b/old-configure.in
@@ -4315,6 +4315,85 @@ dnl =
 dnl ========================================================
 MOZ_ARG_HEADER(Misc. Options)
 
+dnl =========================================================
+dnl = Chrome format
+dnl =========================================================
+MOZ_ARG_ENABLE_STRING([chrome-format],
+[  --enable-chrome-format=jar|flat|omni
+                          Select FORMAT of chrome files during packaging],
+    MOZ_CHROME_FILE_FORMAT=`echo $enableval | tr A-Z a-z`)
+
+if test -z "$MOZ_CHROME_FILE_FORMAT"; then
+    MOZ_CHROME_FILE_FORMAT=omni
+fi
+
+if test "$MOZ_CHROME_FILE_FORMAT" = "symlink"; then
+    AC_MSG_ERROR([--enable-chrome-format=symlink has been deprecated. It is now used by default in $DIST/bin on platforms that support it])
+fi
+
+if test "$MOZ_CHROME_FILE_FORMAT" != "jar" &&
+    test "$MOZ_CHROME_FILE_FORMAT" != "flat" &&
+    test "$MOZ_CHROME_FILE_FORMAT" != "omni"; then
+    AC_MSG_ERROR([--enable-chrome-format must be set to either jar, flat, or omni])
+fi
+
+dnl =========================================================
+dnl = Chrome compression
+dnl =========================================================
+MOZ_ARG_ENABLE_STRING([chrome-compression],
+[  --enable-chrome-compression=none|deflate|brotli
+                          Select COMPRESSION type of chrome files during packaging],
+    JAR_COMPRESSION=`echo $enableval | tr A-Z a-z`)
+
+if test -z "$JAR_COMPRESSION"; then
+    JAR_COMPRESSION=deflate
+fi
+
+if test "$JAR_COMPRESSION" != "none" &&
+    test "$JAR_COMPRESSION" != "deflate" &&
+    test "$JAR_COMPRESSION" != "brotli"; then
+    AC_MSG_ERROR([--enable-chrome-compression must be set to either none, deflate, or brotli])
+fi
+
+dnl =========================================================
+dnl Omnijar packaging (bug 552121)
+dnl =========================================================
+dnl Omnijar packaging is compatible with flat packaging.
+dnl In unpackaged builds, omnijar looks for files as if
+dnl things were flat packaged. After packaging, all files
+dnl are loaded from a single jar. MOZ_CHROME_FILE_FORMAT
+dnl is set to flat since putting files into jars is only
+dnl done during packaging with omnijar.
+if test "$MOZ_CHROME_FILE_FORMAT" = "omni"; then
+    MOZ_OMNIJAR=1
+    AC_DEFINE(MOZ_OMNIJAR)
+fi
+
+# Allow someone to change OMNIJAR_NAME in mozconfig
+MOZ_ARG_WITH_STRING(chrome-name,
+[  --with-chrome-name=CHROMENAME
+                          Set chrome jar name (default=omni.ja)],
+[ val=`echo $withval`
+    OMNIJAR_NAME="$val"])
+
+# Default Omni Jar Name
+if test -z "$OMNIJAR_NAME" ; then
+    OMNIJAR_NAME=omni.ja
+fi
+
+MOZ_PACKAGER_FORMAT="$MOZ_CHROME_FILE_FORMAT"
+if test "$OS_ARCH" = "WINNT"; then
+    MOZ_CHROME_FILE_FORMAT=flat
+else
+    MOZ_CHROME_FILE_FORMAT=symlink
+fi
+
+AC_SUBST(JAR_COMPRESSION)
+AC_SUBST(OMNIJAR_NAME)
+AC_SUBST(MOZ_OMNIJAR)
+AC_SUBST(MOZ_PACKAGER_FORMAT)
+AC_SUBST(MOZ_CHROME_FILE_FORMAT)
+
 dnl ========================================================
 dnl = Disable Jetpack
 dnl ========================================================
diff --git a/parser/html/nsHtml5OwningUTF16Buffer.h b/parser/html/nsHtml5OwningUTF16Buffer.h
index d7e3200ea..0d8777464 100644
--- a/parser/html/nsHtml5OwningUTF16Buffer.h
+++ b/parser/html/nsHtml5OwningUTF16Buffer.h
@@ -52,7 +52,7 @@ public:
     nsrefcnt AddRef();
     nsrefcnt Release();
   private:
-    nsAutoRefCnt mRefCnt;
+    mozilla::ThreadSafeAutoRefCnt mRefCnt;
 };
 
 #endif // nsHtml5OwningUTF16Buffer_h
diff --git a/parser/html/nsHtml5ViewSourceUtils.cpp b/parser/html/nsHtml5ViewSourceUtils.cpp
index b2f635bff..910a6691e 100644
--- a/parser/html/nsHtml5ViewSourceUtils.cpp
+++ b/parser/html/nsHtml5ViewSourceUtils.cpp
@@ -31,7 +31,7 @@ nsHtml5ViewSourceUtils::NewBodyAttributes()
   int32_t tabSize = mozilla::Preferences::GetInt("view_source.tab_size", 4);
   if (tabSize > 0) {
     nsString style;
-    style.AssignASCII("-moz-tab-size: ");
+    style.AssignASCII("tab-size: ");
     style.AppendInt(tabSize);
     bodyAttrs->addAttribute(
       nsHtml5AttributeName::ATTR_STYLE, nsHtml5String::FromString(style), -1);
diff --git a/python/mozbuild/mozbuild/test/backend/test_build.py b/python/mozbuild/mozbuild/test/backend/test_build.py
index d3f5fb6a9..d6111d85f 100644
--- a/python/mozbuild/mozbuild/test/backend/test_build.py
+++ b/python/mozbuild/mozbuild/test/backend/test_build.py
@@ -84,7 +84,7 @@ class TestBuild(unittest.TestCase):
                                    config.topobjdir)
             overrides = [
                 'install_manifest_depends=',
-                'MOZ_JAR_MAKER_FILE_FORMAT=flat',
+                'MOZ_CHROME_FILE_FORMAT=flat',
                 'TEST_MOZBUILD=1',
             ]
             with self.line_handler() as handle_make_line:
@@ -108,7 +108,7 @@ class TestBuild(unittest.TestCase):
                                    config.topobjdir)
             overrides = [
                 'install_manifest_depends=',
-                'MOZ_JAR_MAKER_FILE_FORMAT=flat',
+                'MOZ_CHROME_FILE_FORMAT=flat',
                 'TEST_MOZBUILD=1',
             ]
             with self.line_handler() as handle_make_line:
diff --git a/python/mozbuild/mozpack/copier.py b/python/mozbuild/mozpack/copier.py
index 386930fe7..15c550e7b 100644
--- a/python/mozbuild/mozpack/copier.py
+++ b/python/mozbuild/mozpack/copier.py
@@ -535,7 +535,7 @@ class Jarrer(FileRegistry, BaseFile):
             dest = Dest(dest)
         assert isinstance(dest, Dest)
 
-        from mozpack.mozjar import JarWriter, JarReader
+        from mozpack.mozjar import JarWriter, JarReader, JAR_BROTLI
         try:
             old_jar = JarReader(fileobj=dest)
         except Exception:
diff --git a/python/mozbuild/mozpack/mozjar.py b/python/mozbuild/mozpack/mozjar.py
index a1ada8594..2010a7f13 100644
--- a/python/mozbuild/mozpack/mozjar.py
+++ b/python/mozbuild/mozpack/mozjar.py
@@ -6,6 +6,7 @@ from __future__ import absolute_import
 
 from io import BytesIO
 import struct
+import subprocess
 import zlib
 import os
 from zipfile import (
@@ -15,9 +16,11 @@ from zipfile import (
 from collections import OrderedDict
 from urlparse import urlparse, ParseResult
 import mozpack.path as mozpath
+from mozbuild.util import memoize
 
 JAR_STORED = ZIP_STORED
 JAR_DEFLATED = ZIP_DEFLATED
+JAR_BROTLI = 0x81
 MAX_WBITS = 15
 
 
@@ -262,13 +265,14 @@ class JarFileReader(object):
         corresponding to the file in the jar archive, data a buffer containing
         the file data.
         '''
-        assert header['compression'] in [JAR_DEFLATED, JAR_STORED]
+        assert header['compression'] in [JAR_DEFLATED, JAR_STORED, JAR_BROTLI]
         self._data = data
         # Copy some local file header fields.
         for name in ['filename', 'compressed_size',
                      'uncompressed_size', 'crc32']:
             setattr(self, name, header[name])
-        self.compressed = header['compression'] == JAR_DEFLATED
+        self.compressed = header['compression'] != JAR_STORED
+        self.compress = header['compression']
 
     def read(self, length=-1):
         '''
@@ -317,7 +321,11 @@ class JarFileReader(object):
         if hasattr(self, '_uncompressed_data'):
             return self._uncompressed_data
         data = self.compressed_data
-        if self.compressed:
+        if self.compress == JAR_STORED:
+            data = data.tobytes()
+        elif self.compress == JAR_BROTLI:
+            data = Brotli.decompress(data.tobytes())
+        elif self.compress == JAR_DEFLATED:
             data = zlib.decompress(data.tobytes(), -MAX_WBITS)
         else:
             data = data.tobytes()
@@ -361,6 +369,13 @@ class JarReader(object):
         del self._data
 
     @property
+    def compression(self):
+        entries = self.entries
+        if not entries:
+            return JAR_STORED
+        return max(f['compression'] for f in entries.itervalues())
+
+    @property
     def entries(self):
         '''
         Return an ordered dict of central directory entries, indexed by
@@ -473,6 +488,8 @@ class JarWriter(object):
             self._data = fileobj
         else:
             self._data = open(file, 'wb')
+        if compress is True:
+            compress = JAR_DEFLATED
         self._compress = compress
         self._compress_level = compress_level
         self._contents = OrderedDict()
@@ -574,12 +591,13 @@ class JarWriter(object):
         '''
         Add a new member to the jar archive, with the given name and the given
         data.
-        The compress option indicates if the given data should be compressed
-        (True), not compressed (False), or compressed according to the default
-        defined when creating the JarWriter (None).
-        When the data should be compressed (True or None with self.compress ==
-        True), it is only really compressed if the compressed size is smaller
-        than the uncompressed size.
+        The compress option indicates how the given data should be compressed
+        (one of JAR_STORED, JAR_DEFLATE or JAR_BROTLI), or compressed according
+        to the default defined when creating the JarWriter (None). True and
+        False are allowed values for backwards compatibility, mapping,
+        respectively, to JAR_DEFLATE and JAR_STORED.
+        When the data should be compressed, it is only really compressed if
+        the compressed size is smaller than the uncompressed size.
         The mode option gives the unix permissions that should be stored
         for the jar entry.
         If a duplicated member is found skip_duplicates will prevent raising
@@ -594,8 +612,12 @@ class JarWriter(object):
             raise JarWriterError("File %s already in JarWriter" % name)
         if compress is None:
             compress = self._compress
-        if (isinstance(data, JarFileReader) and data.compressed == compress) \
-                or (isinstance(data, Deflater) and data.compress == compress):
+        if compress is True:
+            compress = JAR_DEFLATED
+        if compress is False:
+            compress = JAR_STORED
+        if (isinstance(data, (JarFileReader, Deflater)) and \
+                data.compress == compress):
             deflater = data
         else:
             deflater = Deflater(compress, compress_level=self._compress_level)
@@ -619,7 +641,7 @@ class JarWriter(object):
         if deflater.compressed:
             entry['min_version'] = 20  # Version 2.0 supports deflated streams
             entry['general_flag'] = 2  # Max compression
-            entry['compression'] = JAR_DEFLATED
+            entry['compression'] = deflater.compress
         else:
             entry['min_version'] = 10  # Version 1.0 for stored streams
             entry['general_flag'] = 0
@@ -659,14 +681,21 @@ class Deflater(object):
     '''
     def __init__(self, compress=True, compress_level=9):
         '''
-        Initialize a Deflater. The compress argument determines whether to
-        try to compress at all.
+        Initialize a Deflater. The compress argument determines how to
+        compress.
         '''
         self._data = BytesIO()
+        if compress is True:
+            compress = JAR_DEFLATED
+        elif compress is False:
+            compress = JAR_STORED
         self.compress = compress
-        if compress:
-            self._deflater = zlib.compressobj(compress_level, zlib.DEFLATED,
-                                              -MAX_WBITS)
+        if compress in (JAR_DEFLATED, JAR_BROTLI):
+            if compress == JAR_DEFLATED:
+                self._deflater = zlib.compressobj(
+                    compress_level, zlib.DEFLATED, -MAX_WBITS)
+            else:
+                self._deflater = BrotliCompress()
             self._deflated = BytesIO()
         else:
             self._deflater = None
@@ -759,6 +788,46 @@ class Deflater(object):
         return self._data.getvalue()
 
 
+class Brotli(object):
+    @staticmethod
+    @memoize
+    def brotli_tool():
+            from buildconfig import topobjdir, substs
+            return os.path.join(topobjdir, 'dist', 'host', 'bin',
+                               'brotli' + substs.get('BIN_SUFFIX', ''))
+
+    @staticmethod
+    def run_brotli_tool(args, input):
+        proc = subprocess.Popen([Brotli.brotli_tool()] + args,
+                                stdin=subprocess.PIPE,
+                                stdout=subprocess.PIPE)
+        (stdout, _) = proc.communicate(input)
+        ret = proc.wait()
+        if ret != 0:
+            raise Exception("Brotli compression failed")
+        return stdout
+
+    @staticmethod
+    def compress(data):
+        return Brotli.run_brotli_tool(['--lgwin=17'], data)
+
+    @staticmethod
+    def decompress(data):
+        return Brotli.run_brotli_tool(['--decompress'], data)
+
+
+class BrotliCompress(object):
+    def __init__(self):
+        self._buf = BytesIO()
+
+    def compress(self, data):
+        self._buf.write(data)
+        return b''
+
+    def flush(self):
+        return Brotli.compress(self._buf.getvalue())
+
+
 class JarLog(dict):
     '''
     Helper to read the file Gecko generates when setting MOZ_JAR_LOG_FILE.
diff --git a/python/mozbuild/mozpack/packager/l10n.py b/python/mozbuild/mozpack/packager/l10n.py
index 758064f59..e3e05fc89 100644
--- a/python/mozbuild/mozpack/packager/l10n.py
+++ b/python/mozbuild/mozpack/packager/l10n.py
@@ -37,6 +37,7 @@ from mozpack.chrome.manifest import (
     Manifest,
 )
 from mozpack.errors import errors
+from mozpack.mozjar import JAR_DEFLATED
 from mozpack.packager.unpack import UnpackFinder
 from createprecomplete import generate_precomplete
 
@@ -241,16 +242,17 @@ def repack(source, l10n, extra_l10n={}, non_resources=[], non_chrome=set()):
             finders[base] = UnpackFinder(path)
         l10n_finder = ComposedFinder(finders)
     copier = FileCopier()
+    compress = min(app_finder.compressed, JAR_DEFLATED)
     if app_finder.kind == 'flat':
         formatter = FlatFormatter(copier)
     elif app_finder.kind == 'jar':
         formatter = JarFormatter(copier,
                                  optimize=app_finder.optimizedjars,
-                                 compress=app_finder.compressed)
+                                 compress=compress)
     elif app_finder.kind == 'omni':
         formatter = OmniJarFormatter(copier, app_finder.omnijar,
                                      optimize=app_finder.optimizedjars,
-                                     compress=app_finder.compressed,
+                                     compress=compress,
                                      non_resources=non_resources)
 
     with errors.accumulate():
diff --git a/python/mozbuild/mozpack/packager/unpack.py b/python/mozbuild/mozpack/packager/unpack.py
index fa2b474e7..515705c0d 100644
--- a/python/mozbuild/mozpack/packager/unpack.py
+++ b/python/mozbuild/mozpack/packager/unpack.py
@@ -54,7 +54,7 @@ class UnpackFinder(BaseFinder):
         self.omnijar = None
         self.jarlogs = {}
         self.optimizedjars = False
-        self.compressed = True
+        self.compressed = False
 
         jars = set()
 
@@ -146,8 +146,7 @@ class UnpackFinder(BaseFinder):
         jar = JarReader(fileobj=file.open())
         if jar.is_optimized:
             self.optimizedjars = True
-        if not any(f.compressed for f in jar):
-            self.compressed = False
+        self.compressed = max(self.compressed, jar.compression)
         if jar.last_preloaded:
             jarlog = jar.entries.keys()
             self.jarlogs[path] = jarlog[:jarlog.index(jar.last_preloaded) + 1]
diff --git a/security/certverifier/CertVerifier.cpp b/security/certverifier/CertVerifier.cpp
index 7f47de14f..389a6c70a 100644
--- a/security/certverifier/CertVerifier.cpp
+++ b/security/certverifier/CertVerifier.cpp
@@ -42,7 +42,6 @@ CertVerifier::CertVerifier(OcspDownloadConfig odc,
                            OcspStrictConfig osc,
                            OcspGetConfig ogc,
                            uint32_t certShortLifetimeInDays,
-                           PinningMode pinningMode,
                            SHA1Mode sha1Mode,
                            BRNameMatchingPolicy::Mode nameMatchingMode,
                            NetscapeStepUpPolicy netscapeStepUpPolicy,
@@ -51,7 +50,6 @@ CertVerifier::CertVerifier(OcspDownloadConfig odc,
   , mOCSPStrict(osc == ocspStrict)
   , mOCSPGETEnabled(ogc == ocspGetEnabled)
   , mCertShortLifetimeInDays(certShortLifetimeInDays)
-  , mPinningMode(pinningMode)
   , mSHA1Mode(sha1Mode)
   , mNameMatchingMode(nameMatchingMode)
   , mNetscapeStepUpPolicy(netscapeStepUpPolicy)
@@ -417,7 +415,7 @@ CertVerifier::VerifyCert(CERTCertificate* cert, SECCertificateUsage usage,
       NSSCertDBTrustDomain trustDomain(trustEmail, defaultOCSPFetching,
                                        mOCSPCache, pinArg, ocspGETConfig,
                                        mCertShortLifetimeInDays,
-                                       pinningDisabled, MIN_RSA_BITS_WEAK,
+                                       MIN_RSA_BITS_WEAK,
                                        ValidityCheckingMode::CheckingOff,
                                        SHA1Mode::Allowed,
                                        NetscapeStepUpPolicy::NeverMatch,
@@ -486,7 +484,7 @@ CertVerifier::VerifyCert(CERTCertificate* cert, SECCertificateUsage usage,
         NSSCertDBTrustDomain
           trustDomain(trustSSL, evOCSPFetching,
                       mOCSPCache, pinArg, ocspGETConfig,
-                      mCertShortLifetimeInDays, mPinningMode, MIN_RSA_BITS,
+                      mCertShortLifetimeInDays, MIN_RSA_BITS,
                       ValidityCheckingMode::CheckForEV,
                       sha1ModeConfigurations[i], mNetscapeStepUpPolicy,
                       originAttributes, builtChain);
@@ -567,7 +565,7 @@ CertVerifier::VerifyCert(CERTCertificate* cert, SECCertificateUsage usage,
           NSSCertDBTrustDomain trustDomain(trustSSL, defaultOCSPFetching,
                                            mOCSPCache, pinArg, ocspGETConfig,
                                            mCertShortLifetimeInDays,
-                                           mPinningMode, keySizeOptions[i],
+                                           keySizeOptions[i],
                                            ValidityCheckingMode::CheckingOff,
                                            sha1ModeConfigurations[j],
                                            mNetscapeStepUpPolicy,
@@ -630,7 +628,7 @@ CertVerifier::VerifyCert(CERTCertificate* cert, SECCertificateUsage usage,
       NSSCertDBTrustDomain trustDomain(trustSSL, defaultOCSPFetching,
                                        mOCSPCache, pinArg, ocspGETConfig,
                                        mCertShortLifetimeInDays,
-                                       pinningDisabled, MIN_RSA_BITS_WEAK,
+                                       MIN_RSA_BITS_WEAK,
                                        ValidityCheckingMode::CheckingOff,
                                        SHA1Mode::Allowed, mNetscapeStepUpPolicy,
                                        originAttributes, builtChain);
@@ -645,7 +643,7 @@ CertVerifier::VerifyCert(CERTCertificate* cert, SECCertificateUsage usage,
       NSSCertDBTrustDomain trustDomain(trustEmail, defaultOCSPFetching,
                                        mOCSPCache, pinArg, ocspGETConfig,
                                        mCertShortLifetimeInDays,
-                                       pinningDisabled, MIN_RSA_BITS_WEAK,
+                                       MIN_RSA_BITS_WEAK,
                                        ValidityCheckingMode::CheckingOff,
                                        SHA1Mode::Allowed,
                                        NetscapeStepUpPolicy::NeverMatch,
@@ -672,7 +670,7 @@ CertVerifier::VerifyCert(CERTCertificate* cert, SECCertificateUsage usage,
       NSSCertDBTrustDomain trustDomain(trustEmail, defaultOCSPFetching,
                                        mOCSPCache, pinArg, ocspGETConfig,
                                        mCertShortLifetimeInDays,
-                                       pinningDisabled, MIN_RSA_BITS_WEAK,
+                                       MIN_RSA_BITS_WEAK,
                                        ValidityCheckingMode::CheckingOff,
                                        SHA1Mode::Allowed,
                                        NetscapeStepUpPolicy::NeverMatch,
@@ -696,7 +694,7 @@ CertVerifier::VerifyCert(CERTCertificate* cert, SECCertificateUsage usage,
       NSSCertDBTrustDomain trustDomain(trustObjectSigning, defaultOCSPFetching,
                                        mOCSPCache, pinArg, ocspGETConfig,
                                        mCertShortLifetimeInDays,
-                                       pinningDisabled, MIN_RSA_BITS_WEAK,
+                                       MIN_RSA_BITS_WEAK,
                                        ValidityCheckingMode::CheckingOff,
                                        SHA1Mode::Allowed,
                                        NetscapeStepUpPolicy::NeverMatch,
@@ -729,7 +727,7 @@ CertVerifier::VerifyCert(CERTCertificate* cert, SECCertificateUsage usage,
 
       NSSCertDBTrustDomain sslTrust(trustSSL, defaultOCSPFetching, mOCSPCache,
                                     pinArg, ocspGETConfig, mCertShortLifetimeInDays,
-                                    pinningDisabled, MIN_RSA_BITS_WEAK,
+                                    MIN_RSA_BITS_WEAK,
                                     ValidityCheckingMode::CheckingOff,
                                     SHA1Mode::Allowed,
                                     NetscapeStepUpPolicy::NeverMatch,
@@ -741,7 +739,7 @@ CertVerifier::VerifyCert(CERTCertificate* cert, SECCertificateUsage usage,
         NSSCertDBTrustDomain emailTrust(trustEmail, defaultOCSPFetching,
                                         mOCSPCache, pinArg, ocspGETConfig,
                                         mCertShortLifetimeInDays,
-                                        pinningDisabled, MIN_RSA_BITS_WEAK,
+                                        MIN_RSA_BITS_WEAK,
                                         ValidityCheckingMode::CheckingOff,
                                         SHA1Mode::Allowed,
                                         NetscapeStepUpPolicy::NeverMatch,
@@ -754,7 +752,6 @@ CertVerifier::VerifyCert(CERTCertificate* cert, SECCertificateUsage usage,
                                                   defaultOCSPFetching, mOCSPCache,
                                                   pinArg, ocspGETConfig,
                                                   mCertShortLifetimeInDays,
-                                                  pinningDisabled,
                                                   MIN_RSA_BITS_WEAK,
                                                   ValidityCheckingMode::CheckingOff,
                                                   SHA1Mode::Allowed,
diff --git a/security/certverifier/CertVerifier.h b/security/certverifier/CertVerifier.h
index fbc3adab4..0bb1508c5 100644
--- a/security/certverifier/CertVerifier.h
+++ b/security/certverifier/CertVerifier.h
@@ -140,13 +140,6 @@ public:
    /*optional out*/ SHA1ModeResult* sha1ModeResult = nullptr,
    /*optional out*/ CertificateTransparencyInfo* ctInfo = nullptr);
 
-  enum PinningMode {
-    pinningDisabled = 0,
-    pinningAllowUserCAMITM = 1,
-    pinningStrict = 2,
-    pinningEnforceTestMode = 3
-  };
-
   enum class SHA1Mode {
     Allowed = 0,
     Forbidden = 1,
@@ -173,7 +166,7 @@ public:
 
   CertVerifier(OcspDownloadConfig odc, OcspStrictConfig osc,
                OcspGetConfig ogc, uint32_t certShortLifetimeInDays,
-               PinningMode pinningMode, SHA1Mode sha1Mode,
+               SHA1Mode sha1Mode,
                BRNameMatchingPolicy::Mode nameMatchingMode,
                NetscapeStepUpPolicy netscapeStepUpPolicy,
                CertificateTransparencyMode ctMode);
@@ -185,7 +178,6 @@ public:
   const bool mOCSPStrict;
   const bool mOCSPGETEnabled;
   const uint32_t mCertShortLifetimeInDays;
-  const PinningMode mPinningMode;
   const SHA1Mode mSHA1Mode;
   const BRNameMatchingPolicy::Mode mNameMatchingMode;
   const NetscapeStepUpPolicy mNetscapeStepUpPolicy;
@@ -215,8 +207,7 @@ private:
 
 mozilla::pkix::Result IsCertBuiltInRoot(CERTCertificate* cert, bool& result);
 mozilla::pkix::Result CertListContainsExpectedKeys(
-  const CERTCertList* certList, const char* hostname, mozilla::pkix::Time time,
-  CertVerifier::PinningMode pinningMode);
+  const CERTCertList* certList, const char* hostname, mozilla::pkix::Time time);
 
 } } // namespace mozilla::psm
 
diff --git a/security/certverifier/NSSCertDBTrustDomain.cpp b/security/certverifier/NSSCertDBTrustDomain.cpp
index a8ecbf1d1..ed16098b8 100644
--- a/security/certverifier/NSSCertDBTrustDomain.cpp
+++ b/security/certverifier/NSSCertDBTrustDomain.cpp
@@ -52,7 +52,6 @@ NSSCertDBTrustDomain::NSSCertDBTrustDomain(SECTrustType certDBTrustType,
              /*optional but shouldn't be*/ void* pinArg,
                                            CertVerifier::OcspGetConfig ocspGETConfig,
                                            uint32_t certShortLifetimeInDays,
-                                           CertVerifier::PinningMode pinningMode,
                                            unsigned int minRSABits,
                                            ValidityCheckingMode validityCheckingMode,
                                            CertVerifier::SHA1Mode sha1Mode,
@@ -65,7 +64,6 @@ NSSCertDBTrustDomain::NSSCertDBTrustDomain(SECTrustType certDBTrustType,
   , mPinArg(pinArg)
   , mOCSPGetConfig(ocspGETConfig)
   , mCertShortLifetimeInDays(certShortLifetimeInDays)
-  , mPinningMode(pinningMode)
   , mMinRSABits(minRSABits)
   , mValidityCheckingMode(validityCheckingMode)
   , mSHA1Mode(sha1Mode)
diff --git a/security/certverifier/NSSCertDBTrustDomain.h b/security/certverifier/NSSCertDBTrustDomain.h
index 50e2c8adc..8d25e746c 100644
--- a/security/certverifier/NSSCertDBTrustDomain.h
+++ b/security/certverifier/NSSCertDBTrustDomain.h
@@ -77,7 +77,6 @@ public:
                        OCSPCache& ocspCache, void* pinArg,
                        CertVerifier::OcspGetConfig ocspGETConfig,
                        uint32_t certShortLifetimeInDays,
-                       CertVerifier::PinningMode pinningMode,
                        unsigned int minRSABits,
                        ValidityCheckingMode validityCheckingMode,
                        CertVerifier::SHA1Mode sha1Mode,
@@ -179,7 +178,6 @@ private:
   void* mPinArg; // non-owning!
   const CertVerifier::OcspGetConfig mOCSPGetConfig;
   const uint32_t mCertShortLifetimeInDays;
-  CertVerifier::PinningMode mPinningMode;
   const unsigned int mMinRSABits;
   ValidityCheckingMode mValidityCheckingMode;
   CertVerifier::SHA1Mode mSHA1Mode;
diff --git a/security/manager/ssl/SharedCertVerifier.h b/security/manager/ssl/SharedCertVerifier.h
index 03619573a..135c8ae51 100644
--- a/security/manager/ssl/SharedCertVerifier.h
+++ b/security/manager/ssl/SharedCertVerifier.h
@@ -20,12 +20,12 @@ public:
 
   SharedCertVerifier(OcspDownloadConfig odc, OcspStrictConfig osc,
                      OcspGetConfig ogc, uint32_t certShortLifetimeInDays,
-                     PinningMode pinningMode, SHA1Mode sha1Mode,
+                     SHA1Mode sha1Mode,
                      BRNameMatchingPolicy::Mode nameMatchingMode,
                      NetscapeStepUpPolicy netscapeStepUpPolicy,
                      CertificateTransparencyMode ctMode)
     : mozilla::psm::CertVerifier(odc, osc, ogc, certShortLifetimeInDays,
-                                 pinningMode, sha1Mode, nameMatchingMode,
+                                 sha1Mode, nameMatchingMode,
                                  netscapeStepUpPolicy, ctMode)
   {
   }
diff --git a/security/manager/ssl/nsNSSComponent.cpp b/security/manager/ssl/nsNSSComponent.cpp
index 897b5743c..6e6d61441 100644
--- a/security/manager/ssl/nsNSSComponent.cpp
+++ b/security/manager/ssl/nsNSSComponent.cpp
@@ -1579,14 +1579,6 @@ void nsNSSComponent::setValidationOptions(bool isInitialSetting,
   PublicSSLState()->SetSignedCertTimestampsEnabled(sctsEnabled);
   PrivateSSLState()->SetSignedCertTimestampsEnabled(sctsEnabled);
 
-  CertVerifier::PinningMode pinningMode =
-    static_cast<CertVerifier::PinningMode>
-      (Preferences::GetInt("security.cert_pinning.enforcement_level",
-                           CertVerifier::pinningDisabled));
-  if (pinningMode > CertVerifier::pinningEnforceTestMode) {
-    pinningMode = CertVerifier::pinningDisabled;
-  }
-
   CertVerifier::SHA1Mode sha1Mode = static_cast<CertVerifier::SHA1Mode>
       (Preferences::GetInt("security.pki.sha1_enforcement_level",
                            static_cast<int32_t>(CertVerifier::SHA1Mode::Allowed)));
@@ -1646,7 +1638,7 @@ void nsNSSComponent::setValidationOptions(bool isInitialSetting,
                                  lock);
   mDefaultCertVerifier = new SharedCertVerifier(odc, osc, ogc,
                                                 certShortLifetimeInDays,
-                                                pinningMode, sha1Mode,
+                                                sha1Mode,
                                                 nameMatchingMode,
                                                 netscapeStepUpPolicy,
                                                 ctMode);
diff --git a/security/manager/ssl/nsSiteSecurityService.cpp b/security/manager/ssl/nsSiteSecurityService.cpp
index fa2619414..5a6ff3d46 100644
--- a/security/manager/ssl/nsSiteSecurityService.cpp
+++ b/security/manager/ssl/nsSiteSecurityService.cpp
@@ -87,8 +87,6 @@ SiteHSTSState::ToString(nsCString& aString)
 
 ////////////////////////////////////////////////////////////////////////////////
 
-const uint64_t kSixtyDaysInSeconds = 60 * 24 * 60 * 60;
-
 static bool
 HostIsIPAddress(const char *hostname)
 {
@@ -398,8 +396,6 @@ ParseSSSHeaders(uint32_t aType,
   //  Unrecognized directives (that are otherwise syntactically valid) are
   //  ignored, and the rest of the header is parsed as normal.
 
-  bool foundReportURI = false;
-
   NS_NAMED_LITERAL_CSTRING(max_age_var, "max-age");
   NS_NAMED_LITERAL_CSTRING(include_subd_var, "includesubdomains");
 
diff --git a/testing/web-platform/tests/vibration/OWNERS b/testing/web-platform/tests/vibration/OWNERS
deleted file mode 100644
index 4020ed82e..000000000
--- a/testing/web-platform/tests/vibration/OWNERS
+++ /dev/null
@@ -1,3 +0,0 @@
-@dontcallmedom
-@zqzhang
-@xinliux
diff --git a/testing/web-platform/tests/vibration/api-is-present.html b/testing/web-platform/tests/vibration/api-is-present.html
deleted file mode 100644
index f5c976dff..000000000
--- a/testing/web-platform/tests/vibration/api-is-present.html
+++ /dev/null
@@ -1,27 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <meta charset='utf-8'/>
-    <title>Vibration API: test that the vibrate() method is present (with or without vendor prefix)</title>
-    <link rel='author' title='Robin Berjon' href='mailto:robin@berjon.com'/>
-    <link rel='help' href='http://www.w3.org/TR/vibration/#methods'/>
-    <meta name='flags' content='dom'/>
-    <meta name='assert' content='Check that the vibrate() method is present.'/>
-  </head>
-  <body>
-    <h1>Description</h1>
-    <p>
-      This test checks for the presence of the <code>vibrate()</code> method, taking
-      vendor prefixes into account.
-    </p>
-    <div id='log'></div>
-    <script src='/resources/testharness.js'></script>
-    <script src='/resources/testharnessreport.js'></script>
-    <script src='/common/vendor-prefix.js' data-prefixed-objects='[{"ancestors":["navigator"], "name":"vibrate"}]'></script>
-    <script>
-      test(function () {
-          assert_true(undefined !== navigator.vibrate, "navigator.vibrate exists");
-      }, "vibrate() is present on navigator");
-    </script>
-  </body>
-</html>
diff --git a/testing/web-platform/tests/vibration/cancel-when-hidden-manual.html b/testing/web-platform/tests/vibration/cancel-when-hidden-manual.html
deleted file mode 100644
index 569970758..000000000
--- a/testing/web-platform/tests/vibration/cancel-when-hidden-manual.html
+++ /dev/null
@@ -1,38 +0,0 @@
-<!DOCTYPE html>
-<meta charset='utf-8'>
-<title>Vibration API: cancel ongoing vibrate() when hidden by switching tab/window</title>
-<link rel='author' title='Intel' href='http://www.intel.com'>
-<link rel='help' href='http://dev.w3.org/2009/dap/vibration/#vibration-interface'>
-<meta name='flags' content='interact'>
-<meta name='assert' content='If the visibilitychange event is dispatched at the Document in a browsing context, cancel the pre-existing instance of the processing vibration patterns algorithm'>
-<style>
-  button {
-    height: 100px;
-    width:  100px;
-  }
-</style>
-
-<h1>Description</h1>
-<p>
-  After hitting the button below, your device must vibrate for a short period of time (roughly one
-  second). If it vibrates for a longer time (roughly five seconds, it should feel somewhat long) then
-  the test has failed.
-</p>
-<button id='vib'>Vibrate!</button>
-<script src='/common/vendor-prefix.js' data-prefixed-objects='[{"ancestors":["navigator"], "name":"vibrate"}]'></script>
-<script>
-  var win;
-
-  if (undefined !== navigator.vibrate) {
-    document.getElementById('vib').onclick = function () {
-      navigator.vibrate(5000);
-      setTimeout(function () {
-        win = window.open('about:blank', '_blank');
-        setTimeout(function() {
-          win.close();
-        }, 100);
-      }, 1000);
-    };
-  }
-</script>
-
diff --git a/testing/web-platform/tests/vibration/cancel-with-0-manual.html b/testing/web-platform/tests/vibration/cancel-with-0-manual.html
deleted file mode 100644
index 6890d5764..000000000
--- a/testing/web-platform/tests/vibration/cancel-with-0-manual.html
+++ /dev/null
@@ -1,31 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <meta charset='utf-8'/>
-    <title>Vibration API: cancel ongoing vibrate() with 0</title>
-    <link rel='author' title='Robin Berjon' href='mailto:robin@berjon.com'/>
-    <link rel='help' href='http://www.w3.org/TR/vibration/#methods'/>
-    <meta name='flags' content='dom, interact'/>
-    <meta name='assert' content='If pattern is 0, cancel the pre-existing instance of the processing vibration patterns algorithm'/>
-  </head>
-  <body>
-    <h1>Description</h1>
-    <p>
-      After hitting the button below, your device must vibrate for a short period of time (roughly one
-      second). If it vibrates for a longer time (roughly five seconds, it should feel somewhat long) then
-      the test has failed.
-    </p>
-    <button id='vib'>Vibrate!</button>
-    <script src='/common/vendor-prefix.js' data-prefixed-objects='[{"ancestors":["navigator"], "name":"vibrate"}]'></script>
-    <script>
-      if (undefined !== navigator.vibrate) {
-          document.getElementById("vib").onclick = function () {
-              navigator.vibrate(5000);
-              setTimeout(function () {
-                  navigator.vibrate(0);
-              }, 1000);
-          };
-      }
-    </script>
-  </body>
-</html>
diff --git a/testing/web-platform/tests/vibration/cancel-with-array-0-manual.html b/testing/web-platform/tests/vibration/cancel-with-array-0-manual.html
deleted file mode 100644
index 60689cc2c..000000000
--- a/testing/web-platform/tests/vibration/cancel-with-array-0-manual.html
+++ /dev/null
@@ -1,33 +0,0 @@
-<!DOCTYPE html>
-<meta charset='utf-8'>
-<title>Vibration API: cancel ongoing vibrate() with [0]</title>
-<link rel='author' title='Intel' href='http://www.intel.com'>
-<link rel='help' href='http://dev.w3.org/2009/dap/vibration/#vibration-interface'>
-<meta name='flags' content='interact'>
-<meta name='assert' content='If pattern contains a single entry with a value of 0, cancel the pre-existing instance of the processing vibration patterns algorithm'>
-<style>
-  button {
-    height: 100px;
-    width:  100px;
-  }
-</style>
-
-<h1>Description</h1>
-<p>
-  After hitting the button below, your device must vibrate for a short period of time (roughly one
-  second). If it vibrates for a longer time (roughly five seconds, it should feel somewhat long) then
-  the test has failed.
-</p>
-<button id='vib'>Vibrate!</button>
-<script src='/common/vendor-prefix.js' data-prefixed-objects='[{"ancestors":["navigator"], "name":"vibrate"}]'></script>
-<script>
-  if (undefined !== navigator.vibrate) {
-    document.getElementById('vib').onclick = function () {
-      navigator.vibrate(5000);
-      setTimeout(function () {
-        navigator.vibrate([0]);
-      }, 1000);
-    };
-  }
-</script>
-
diff --git a/testing/web-platform/tests/vibration/cancel-with-empty-array-manual.html b/testing/web-platform/tests/vibration/cancel-with-empty-array-manual.html
deleted file mode 100644
index 9d4be2b3a..000000000
--- a/testing/web-platform/tests/vibration/cancel-with-empty-array-manual.html
+++ /dev/null
@@ -1,31 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <meta charset='utf-8'/>
-    <title>Vibration API: cancel ongoing vibrate() with []</title>
-    <link rel='author' title='Robin Berjon' href='mailto:robin@berjon.com'/>
-    <link rel='help' href='http://www.w3.org/TR/vibration/#methods'/>
-    <meta name='flags' content='dom, interact'/>
-    <meta name='assert' content='If pattern is an empty list, cancel the pre-existing instance of the processing vibration patterns algorithm'/>
-  </head>
-  <body>
-    <h1>Description</h1>
-    <p>
-      After hitting the button below, your device must vibrate for a short period of time (roughly one
-      second). If it vibrates for a longer time (roughly five seconds, it should feel somewhat long) then
-      the test has failed.
-    </p>
-    <button id='vib'>Vibrate!</button>
-    <script src='/common/vendor-prefix.js' data-prefixed-objects='[{"ancestors":["navigator"], "name":"vibrate"}]'></script>
-    <script>
-      if (undefined !== navigator.vibrate) {
-          document.getElementById("vib").onclick = function () {
-              navigator.vibrate(5000);
-              setTimeout(function () {
-                  navigator.vibrate([]);
-              }, 1000);
-          };
-      }
-    </script>
-  </body>
-</html>
diff --git a/testing/web-platform/tests/vibration/cancel-with-new-manual.html b/testing/web-platform/tests/vibration/cancel-with-new-manual.html
deleted file mode 100644
index 1cd9daf17..000000000
--- a/testing/web-platform/tests/vibration/cancel-with-new-manual.html
+++ /dev/null
@@ -1,32 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <meta charset='utf-8'/>
-    <title>Vibration API: cancel ongoing vibrate() with a new call to vibrate</title>
-    <link rel='author' title='Robin Berjon' href='mailto:robin@berjon.com'/>
-    <link rel='help' href='http://www.w3.org/TR/vibration/#methods'/>
-    <meta name='flags' content='dom, interact'/>
-    <meta name='assert' content='Cancel the pre-existing instance of the processing vibration patterns algorithm, if any.'/>
-  </head>
-  <body>
-    <h1>Description</h1>
-    <p>
-      After hitting the button below, your device must vibrate continuously for a short period of time (roughly one
-      second), then vibrate a series of short bursts. If the initial continuously vibration is longer (roughly five
-      seconds, it should feel somewhat long) or if there is no series of short vibration bursts then the test has
-      failed.
-    </p>
-    <button id='vib'>Vibrate!</button>
-    <script src='/common/vendor-prefix.js' data-prefixed-objects='[{"ancestors":["navigator"], "name":"vibrate"}]'></script>
-    <script>
-      if (undefined !== navigator.vibrate) {
-          document.getElementById("vib").onclick = function () {
-              navigator.vibrate(5000);
-              setTimeout(function () {
-                  navigator.vibrate([200, 200, 200, 200, 200, 200, 200, 200, 200]);
-              }, 1000);
-          };
-      }
-    </script>
-  </body>
-</html>
diff --git a/testing/web-platform/tests/vibration/idl.html b/testing/web-platform/tests/vibration/idl.html
deleted file mode 100644
index 167090cd6..000000000
--- a/testing/web-platform/tests/vibration/idl.html
+++ /dev/null
@@ -1,23 +0,0 @@
-<!doctype html>
-<meta charset=utf-8>
-<title>IDL harness tests for Vibration API</title>
-<body>
-    <h1>Description</h1>
-    <p>
-      This test validates the IDL defined by the Vibration API.
-    </p>
-    <p>
-      This test uses <a href="/resources/idlharness.js">idlharness.js</a>
-    </p>
-<div id="log"></div>
-<script src=/resources/testharness.js></script>
-<script src=/resources/testharnessreport.js></script>
-<script src=/resources/WebIDLParser.js></script>
-<script src=/resources/idlharness.js></script>
-<script>
-var idl_array = new IdlArray();
-idl_array.add_untested_idls("interface Navigator {};");
-idl_array.add_idls("partial interface Navigator { boolean vibrate ((unsigned long or sequence<unsigned long>) pattern);};");
-idl_array.add_objects({Navigator: ['navigator']});
-idl_array.test();
-</script>
diff --git a/testing/web-platform/tests/vibration/invalid-values.html b/testing/web-platform/tests/vibration/invalid-values.html
deleted file mode 100644
index a544ac23c..000000000
--- a/testing/web-platform/tests/vibration/invalid-values.html
+++ /dev/null
@@ -1,79 +0,0 @@
-<!DOCTYPE html>
-<meta charset='utf-8'>
-<title>Vibration API: vibrate(invalid)</title>
-<link rel='author' title='Intel' href='http://www.intel.com'>
-<link rel='help' href='http://dev.w3.org/2009/dap/vibration/#vibration-interface'>
-
-<h1>Description</h1>
-<p>
-  This test checks the <code>vibrate()</code> method with invalid parameter,
-  taking vendor prefixes into account.
-</p>
-<div id='log'></div>
-<script src='/resources/testharness.js'></script>
-<script src='/resources/testharnessreport.js'></script>
-<script src='../support/vendor-prefix.js' data-prefixed-objects='[{"ancestors":["navigator"], "name":"vibrate"}]'></script>
-<script>
-  test(function() {
-    assert_throws(new TypeError(), function() {
-      navigator.vibrate();
-    }, 'Argument is required, so was expecting a TypeError.');
-  }, 'Missing pattern argument');
-
-  test(function() {
-    try {
-      navigator.vibrate(undefined);
-    } catch(e) {
-      assert_unreached('error message: ' + e.message);
-    }
-  }, 'pattern of undefined resolves to []');
-
-  test(function() {
-    try {
-      navigator.vibrate(null);
-    } catch(e) {
-      assert_unreached('error message: ' + e.message);
-    }
-  }, 'pattern of null resolves to []');
-
-  test(function() {
-    try {
-      navigator.vibrate('one');
-    } catch(e) {
-      assert_unreached('error message: ' + e.message);
-    }
-  }, 'pattern of empty string resolves to [""]');
-
-  test(function() {
-    try {
-      navigator.vibrate('one');
-    } catch(e) {
-      assert_unreached('error message: ' + e.message);
-    }
-  }, 'pattern of string resolves to ["one"]');
-
-  test(function() {
-    try {
-      navigator.vibrate(new String('one'));
-    } catch(e) {
-      assert_unreached('error message: ' + e.message);
-    }
-  }, 'pattern of String instance resolves to ["one"]');
-
-  test(function() {
-    try {
-      navigator.vibrate(NaN);
-    } catch(e) {
-      assert_unreached('error message: ' + e.message);
-    }
-  }, 'pattern of NaN resolves to [NaN]');
-
-  test(function() {
-    try {
-      navigator.vibrate({});
-    } catch(e) {
-      assert_unreached('error message: ' + e.message);
-    }
-  }, 'pattern of {} resolves to [{}]');
-</script>
-
diff --git a/testing/web-platform/tests/vibration/pattern-array-extra-manual.html b/testing/web-platform/tests/vibration/pattern-array-extra-manual.html
deleted file mode 100644
index 3f5ccf386..000000000
--- a/testing/web-platform/tests/vibration/pattern-array-extra-manual.html
+++ /dev/null
@@ -1,27 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <meta charset='utf-8'/>
-    <title>Vibration API: test a pattern array parameter to vibrate() with an extra (even) item</title>
-    <link rel='author' title='Robin Berjon' href='mailto:robin@berjon.com'/>
-    <link rel='help' href='http://www.w3.org/TR/vibration/#methods'/>
-    <meta name='flags' content='dom, interact'/>
-    <meta name='assert' content='If the length of pattern is even, then remove the last entry in pattern.'/>
-  </head>
-  <body>
-    <h1>Description</h1>
-    <p>
-      After hitting the button below, your device must vibrate three times for one second, separated
-      by one second intervals.
-    </p>
-    <button id='vib'>Vibrate!</button>
-    <script src='/common/vendor-prefix.js' data-prefixed-objects='[{"ancestors":["navigator"], "name":"vibrate"}]'></script>
-    <script>
-      if (undefined !== navigator.vibrate) {
-          document.getElementById("vib").onclick = function () {
-              navigator.vibrate([1000, 1000, 1000, 1000, 1000, 1000]);
-          };
-      }
-    </script>
-  </body>
-</html>
diff --git a/testing/web-platform/tests/vibration/pattern-array-manual.html b/testing/web-platform/tests/vibration/pattern-array-manual.html
deleted file mode 100644
index 43674bf8c..000000000
--- a/testing/web-platform/tests/vibration/pattern-array-manual.html
+++ /dev/null
@@ -1,26 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <meta charset='utf-8'/>
-    <title>Vibration API: test a pattern array parameter to vibrate()</title>
-    <link rel='author' title='Robin Berjon' href='mailto:robin@berjon.com'/>
-    <link rel='help' href='http://www.w3.org/TR/vibration/#methods'/>
-    <meta name='flags' content='dom, interact'/>
-  </head>
-  <body>
-    <h1>Description</h1>
-    <p>
-      After hitting the button below, your device must vibrate three times for one second, separated
-      by one second intervals.
-    </p>
-    <button id='vib'>Vibrate!</button>
-    <script src='/common/vendor-prefix.js' data-prefixed-objects='[{"ancestors":["navigator"], "name":"vibrate"}]'></script>
-    <script>
-      if (undefined !== navigator.vibrate) {
-          document.getElementById("vib").onclick = function () {
-              navigator.vibrate([1000, 1000, 1000, 1000, 1000]);
-          };
-      }
-    </script>
-  </body>
-</html>
diff --git a/testing/web-platform/tests/vibration/pattern-array-with-0-manual.html b/testing/web-platform/tests/vibration/pattern-array-with-0-manual.html
deleted file mode 100644
index dff2f1ed7..000000000
--- a/testing/web-platform/tests/vibration/pattern-array-with-0-manual.html
+++ /dev/null
@@ -1,26 +0,0 @@
-<!DOCTYPE html>
-<meta charset='utf-8'>
-<title>Vibration API: test a pattern array with 0ms vibration and still to vibrate()</title>
-<link rel='author' title='Intel' href='http://www.intel.com'>
-<link rel='help' href='http://dev.w3.org/2009/dap/vibration/#vibration-interface'>
-<meta name='flags' content='interact'>
-<style>
-  button {
-    height: 100px;
-    width:  100px;
-  }
-</style>
-
-<h1>Description</h1>
-<p>
-   After hitting the button below, your device must vibrate continuously for about two seconds, once.
-</p>
-<button id='vib'>Vibrate!</button>
-<div id='log'></div>
-<script src='/common/vendor-prefix.js' data-prefixed-objects='[{"ancestors":["navigator"], "name":"vibrate"}]'></script>
-<script>
-  document.getElementById("vib").onclick = function () {
-    navigator.vibrate([0, 0, 2000]);
-  };
-</script>
-
diff --git a/testing/web-platform/tests/vibration/silent-ignore.html b/testing/web-platform/tests/vibration/silent-ignore.html
deleted file mode 100644
index c7447df51..000000000
--- a/testing/web-platform/tests/vibration/silent-ignore.html
+++ /dev/null
@@ -1,31 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <meta charset='utf-8'/>
-    <title>Vibration API: test that calls to vibrate() are silently ignored when the device cannot vibrate</title>
-    <link rel='author' title='Robin Berjon' href='mailto:robin@berjon.com'/>
-    <link rel='help' href='http://www.w3.org/TR/vibration/#methods'/>
-    <meta name='flags' content='dom, no-vibrator'/>
-    <meta name='assert' content='If the device does not provide a vibration mechanism, or it is disabled, the user agent must silently ignore any invocations of the vibrate() method.'/>
-  </head>
-  <body>
-    <h1>Description</h1>
-    <p>
-      <strong>This test is only useful on devices that do not have vibration capability</strong>.
-      If your device supports vibration, then <strong>skip</strong> this test. An implementation
-      supporting this API but running on a device that cannot vibrate must silently ignore the
-      call (we test that it doesn't throw).
-    </p>
-    <div id='log'></div>
-    <script src='/resources/testharness.js'></script>
-    <script src='/resources/testharnessreport.js'></script>
-    <script src='/common/vendor-prefix.js' data-prefixed-objects='[{"ancestors":["navigator"], "name":"vibrate"}]'></script>
-    <script>
-      if (undefined !== navigator.vibrate) {
-          test(function () {
-              assert_true(navigator.vibrate(1000), "vibrate() returns true when vibration is not supported");
-          }, "Calling vibrate returns true");
-      }
-    </script>
-  </body>
-</html>
diff --git a/testing/web-platform/tests/vibration/simple-array-manual.html b/testing/web-platform/tests/vibration/simple-array-manual.html
deleted file mode 100644
index 4a85bd6ad..000000000
--- a/testing/web-platform/tests/vibration/simple-array-manual.html
+++ /dev/null
@@ -1,23 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <meta charset='utf-8'/>
-    <title>Vibration API: test a simple array parameter to vibrate()</title>
-    <link rel='author' title='Robin Berjon' href='mailto:robin@berjon.com'/>
-    <link rel='help' href='http://www.w3.org/TR/vibration/#methods'/>
-  </head>
-  <body>
-    <h1>Description</h1>
-    <p>
-      After hitting the button below, your device must vibrate continuously for about two seconds, once.
-    </p>
-    <button id='vib'>Vibrate!</button>
-    <div id='log'></div>
-    <script src='/common/vendor-prefix.js' data-prefixed-objects='[{"ancestors":["navigator"], "name":"vibrate"}]'></script>
-    <script>
-      document.getElementById("vib").onclick = function () {
-        navigator.vibrate([2000]);
-      };
-    </script>
-  </body>
-</html>
diff --git a/testing/web-platform/tests/vibration/simple-scalar-manual.html b/testing/web-platform/tests/vibration/simple-scalar-manual.html
deleted file mode 100644
index 0c7637bba..000000000
--- a/testing/web-platform/tests/vibration/simple-scalar-manual.html
+++ /dev/null
@@ -1,25 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <meta charset='utf-8'/>
-    <title>Vibration API: test a simple scalar parameter to vibrate()</title>
-    <link rel='author' title='Robin Berjon' href='mailto:robin@berjon.com'/>
-    <link rel='help' href='http://www.w3.org/TR/vibration/#methods'/>
-    <meta name='flags' content='dom, interact'/>
-  </head>
-  <body>
-    <h1>Description</h1>
-    <p>
-      After hitting the button below, your device must vibrate continuously for about two seconds, once.
-    </p>
-    <button id='vib'>Vibrate!</button>
-    <script src='/common/vendor-prefix.js' data-prefixed-objects='[{"ancestors":["navigator"], "name":"vibrate"}]'></script>
-    <script>
-      if (undefined !== navigator.vibrate) {
-          document.getElementById("vib").onclick = function () {
-              navigator.vibrate(2000);
-          };
-      }
-    </script>
-  </body>
-</html>
diff --git a/toolkit/moz.configure b/toolkit/moz.configure
index 863327751..8d399be67 100644
--- a/toolkit/moz.configure
+++ b/toolkit/moz.configure
@@ -345,36 +345,6 @@ set_config('MOZ_FMP4', fmp4)
 set_define('MOZ_FMP4', fmp4)
 add_old_configure_assignment('MOZ_FMP4', fmp4)
 
-# Miscellaneous
-# ==============================================================
-option(name='--enable-chrome-format',
-       help='Select FORMAT of chrome files during packaging.',
-       nargs=1,
-       choices=('omni', 'jar', 'flat'),
-       default='omni')
-
-@depends('--enable-chrome-format')
-def packager_format(value):
-    return value[0]
-
-set_config('MOZ_PACKAGER_FORMAT', packager_format)
-
-@depends(host, build_project)
-def jar_maker_format(host, build_project):
-    # Multilocales for mobile/android use the same mergedirs for all locales,
-    # so we can't use symlinks for those builds.
-    if host.os == 'WINNT':
-        return 'flat'
-    return 'symlink'
-
-set_config('MOZ_JAR_MAKER_FILE_FORMAT', jar_maker_format)
-
-@depends(toolkit)
-def omnijar_name(toolkit):
-    return 'omni.ja'
-
-set_config('OMNIJAR_NAME', omnijar_name)
-
 # Permissions system
 # ==============================================================
 option(name='--disable-permissions',
diff --git a/toolkit/mozapps/installer/packager.mk b/toolkit/mozapps/installer/packager.mk
index e700b5162..6cae15658 100644
--- a/toolkit/mozapps/installer/packager.mk
+++ b/toolkit/mozapps/installer/packager.mk
@@ -50,7 +50,7 @@ stage-package: $(MOZ_PKG_MANIFEST) $(MOZ_PKG_MANIFEST_DEPS)
 		) \
 		$(if $(JARLOG_DIR),$(addprefix --jarlog ,$(wildcard $(JARLOG_FILE_AB_CD)))) \
 		$(if $(OPTIMIZEJARS),--optimizejars) \
-		$(if $(DISABLE_JAR_COMPRESSION),--disable-compression) \
+		$(addprefix --compress ,$(JAR_COMPRESSION)) \
 		$(addprefix --unify ,$(UNIFY_DIST)) \
 		$(MOZ_PKG_MANIFEST) '$(DIST)' '$(DIST)'/$(STAGEPATH)$(MOZ_PKG_DIR)$(if $(MOZ_PKG_MANIFEST),,$(_BINPATH)) \
 		$(if $(filter omni,$(MOZ_PACKAGER_FORMAT)),$(if $(NON_OMNIJAR_FILES),--non-resource $(NON_OMNIJAR_FILES)))
diff --git a/toolkit/mozapps/installer/packager.py b/toolkit/mozapps/installer/packager.py
index 1a144823c..3b90e97c2 100644
--- a/toolkit/mozapps/installer/packager.py
+++ b/toolkit/mozapps/installer/packager.py
@@ -23,6 +23,7 @@ from mozpack.copier import (
     Jarrer,
 )
 from mozpack.errors import errors
+from mozpack.mozjar import JAR_BROTLI
 from mozpack.unify import UnifiedBuildFinder
 import mozpack.path as mozpath
 import buildconfig
@@ -270,9 +271,9 @@ def main():
                         help='Enable jar optimizations')
     parser.add_argument('--unify', default='',
                         help='Base directory of another build to unify with')
-    parser.add_argument('--disable-compression', action='store_false',
-                        dest='compress', default=True,
-                        help='Disable jar compression')
+    parser.add_argument('--compress', choices=('none', 'deflate', 'brotli'),
+                        default='deflate',
+                        help='Use given jar compression (default: deflate)')
     parser.add_argument('manifest', default=None, nargs='?',
                         help='Manifest file name')
     parser.add_argument('source', help='Source directory')
@@ -290,15 +291,21 @@ def main():
         for name, value in [split_define(d) for d in args.defines]:
             defines[name] = value
 
+    compress = {
+        'none': False,
+        'deflate': True,
+        'brotli': JAR_BROTLI,
+    }[args.compress]
+
     copier = FileCopier()
     if args.format == 'flat':
         formatter = FlatFormatter(copier)
     elif args.format == 'jar':
-        formatter = JarFormatter(copier, compress=args.compress, optimize=args.optimizejars)
+        formatter = JarFormatter(copier, compress=compress, optimize=args.optimizejars)
     elif args.format == 'omni':
         formatter = OmniJarFormatter(copier,
                                      buildconfig.substs['OMNIJAR_NAME'],
-                                     compress=args.compress,
+                                     compress=compress,
                                      optimize=args.optimizejars,
                                      non_resources=args.non_resource)
     else:
diff --git a/toolkit/mozapps/installer/upload-files.mk b/toolkit/mozapps/installer/upload-files.mk
index 82b550fb4..865d2cf6a 100644
--- a/toolkit/mozapps/installer/upload-files.mk
+++ b/toolkit/mozapps/installer/upload-files.mk
@@ -385,7 +385,7 @@ ifneq (android,$(MOZ_WIDGET_TOOLKIT))
   OPTIMIZEJARS = 1
   ifneq (gonk,$(MOZ_WIDGET_TOOLKIT))
     ifdef NIGHTLY_BUILD
-      DISABLE_JAR_COMPRESSION = 1
+      JAR_COMPRESSION ?= none
     endif
   endif
 endif
diff --git a/widget/cocoa/VibrancyManager.h b/widget/cocoa/VibrancyManager.h
index 7a7ea3af1..cae57a269 100644
--- a/widget/cocoa/VibrancyManager.h
+++ b/widget/cocoa/VibrancyManager.h
@@ -78,14 +78,6 @@ public:
   bool HasVibrantRegions() { return !mVibrantRegions.IsEmpty(); }
 
   /**
-   * Clear the vibrant areas that we know about.
-   * The clearing happens in the current NSGraphicsContext. If you call this
-   * from within an -[NSView drawRect:] implementation, the currrent
-   * NSGraphicsContext is already correctly set to the window drawing context.
-   */
-  void ClearVibrantAreas() const;
-
-  /**
    * Return the fill color that should be drawn on top of the cleared window
    * parts. Usually this would be drawn by -[NSVisualEffectView drawRect:].
    * The returned color is opaque if the system-wide "Reduce transparency"
@@ -106,10 +98,19 @@ public:
    */
   static bool SystemSupportsVibrancy();
 
-protected:
-  void ClearVibrantRegion(const LayoutDeviceIntRegion& aVibrantRegion) const;
-  NSView* CreateEffectView(VibrancyType aType);
+  /**
+   * Create an NSVisualEffectView for the specified vibrancy type. The return
+   * value is not autoreleased. We return an object of type NSView* because we
+   * compile with an SDK that does not contain a definition for
+   * NSVisualEffectView.
+   * @param aIsContainer Whether this NSView will have child views. This value
+   *                     affects hit testing: Container views will pass through
+   *                     hit testing requests to their children, and leaf views
+   *                     will be transparent to hit testing.
+   */
+  static NSView* CreateEffectView(VibrancyType aType, BOOL aIsContainer = NO);
 
+protected:
   const nsChildView& mCoordinateConverter;
   NSView* mContainerView;
   nsClassHashtable<nsUint32HashKey, ViewRegion> mVibrantRegions;
diff --git a/widget/cocoa/VibrancyManager.mm b/widget/cocoa/VibrancyManager.mm
index b6176de2b..93a774254 100644
--- a/widget/cocoa/VibrancyManager.mm
+++ b/widget/cocoa/VibrancyManager.mm
@@ -24,24 +24,6 @@ VibrancyManager::UpdateVibrantRegion(VibrancyType aType,
   });
 }
 
-void
-VibrancyManager::ClearVibrantAreas() const
-{
-  for (auto iter = mVibrantRegions.ConstIter(); !iter.Done(); iter.Next()) {
-    ClearVibrantRegion(iter.UserData()->Region());
-  }
-}
-
-void
-VibrancyManager::ClearVibrantRegion(const LayoutDeviceIntRegion& aVibrantRegion) const
-{
-  [[NSColor clearColor] set];
-
-  for (auto iter = aVibrantRegion.RectIter(); !iter.Done(); iter.Next()) {
-    NSRectFill(mCoordinateConverter.DevPixelsToCocoaPoints(iter.Get()));
-  }
-}
-
 @interface NSView(CurrentFillColor)
 - (NSColor*)_currentFillColor;
 @end
@@ -65,9 +47,8 @@ VibrancyManager::VibrancyFillColorForType(VibrancyType aType)
   NSView* view = mVibrantRegions.LookupOrAdd(uint32_t(aType))->GetAnyView();
 
   if (view && [view respondsToSelector:@selector(_currentFillColor)]) {
-    // -[NSVisualEffectView _currentFillColor] is the color that our view
-    // would draw during its drawRect implementation, if we hadn't
-    // disabled that.
+    // -[NSVisualEffectView _currentFillColor] is the color that the view
+    // draws in its drawRect implementation.
     return AdjustedColor([view _currentFillColor], aType);
   }
   return [NSColor whiteColor];
@@ -88,19 +69,6 @@ VibrancyManager::VibrancyFontSmoothingBackgroundColorForType(VibrancyType aType)
   return [NSColor clearColor];
 }
 
-static void
-DrawRectNothing(id self, SEL _cmd, NSRect aRect)
-{
-  // The super implementation would clear the background.
-  // That's fine for views that are placed below their content, but our
-  // setup is different: Our drawn content is drawn to mContainerView, which
-  // sits below this EffectView. So we must not clear the background here,
-  // because we'd erase that drawn content.
-  // Of course the regular content drawing still needs to clear the background
-  // behind vibrant areas. This is taken care of by having nsNativeThemeCocoa
-  // return true from NeedToClearBackgroundBehindWidget for vibrant widgets.
-}
-
 static NSView*
 HitTestNil(id self, SEL _cmd, NSPoint aPoint)
 {
@@ -116,21 +84,20 @@ AllowsVibrancyYes(id self, SEL _cmd)
 }
 
 static Class
-CreateEffectViewClass(BOOL aForegroundVibrancy)
+CreateEffectViewClass(BOOL aForegroundVibrancy, BOOL aIsContainer)
 {
-  // Create a class called EffectView that inherits from NSVisualEffectView
-  // and overrides the methods -[NSVisualEffectView drawRect:] and
-  // -[NSView hitTest:].
+  // Create a class that inherits from NSVisualEffectView and overrides the
+  // methods -[NSView hitTest:] and  -[NSVisualEffectView allowsVibrancy].
   Class NSVisualEffectViewClass = NSClassFromString(@"NSVisualEffectView");
   const char* className = aForegroundVibrancy
     ? "EffectViewWithForegroundVibrancy" : "EffectViewWithoutForegroundVibrancy";
   Class EffectViewClass = objc_allocateClassPair(NSVisualEffectViewClass, className, 0);
-  class_addMethod(EffectViewClass, @selector(drawRect:), (IMP)DrawRectNothing,
-                  "v@:{CGRect={CGPoint=dd}{CGSize=dd}}");
-  class_addMethod(EffectViewClass, @selector(hitTest:), (IMP)HitTestNil,
-                  "@@:{CGPoint=dd}");
+  if (!aIsContainer) {
+    class_addMethod(EffectViewClass, @selector(hitTest:), (IMP)HitTestNil,
+                    "@@:{CGPoint=dd}");
+  }
   if (aForegroundVibrancy) {
-    // Also override the -[NSView allowsVibrancy] method to return YES.
+    // Override the -[NSView allowsVibrancy] method to return YES.
     class_addMethod(EffectViewClass, @selector(allowsVibrancy), (IMP)AllowsVibrancyYes, "I@:");
   }
   return EffectViewClass;
@@ -217,13 +184,20 @@ enum {
 @end
 
 NSView*
-VibrancyManager::CreateEffectView(VibrancyType aType)
-{
-  static Class EffectViewClassWithoutForegroundVibrancy = CreateEffectViewClass(NO);
-  static Class EffectViewClassWithForegroundVibrancy = CreateEffectViewClass(YES);
-
-  Class EffectViewClass = HasVibrantForeground(aType)
-    ? EffectViewClassWithForegroundVibrancy : EffectViewClassWithoutForegroundVibrancy;
+VibrancyManager::CreateEffectView(VibrancyType aType, BOOL aIsContainer)
+{
+  static Class EffectViewWithoutForegroundVibrancy = CreateEffectViewClass(NO, NO);
+  static Class EffectViewWithForegroundVibrancy = CreateEffectViewClass(YES, NO);
+  static Class EffectViewContainer = CreateEffectViewClass(NO, YES);
+
+  // Pick the right NSVisualEffectView subclass for the desired vibrancy mode.
+  // For "container" views, never use foreground vibrancy, because returning
+  // YES from allowsVibrancy forces on foreground vibrancy for all descendant
+  // views which can have unintended effects.
+  Class EffectViewClass = aIsContainer
+                              ? EffectViewContainer
+                              : (HasVibrantForeground(aType) ? EffectViewWithForegroundVibrancy
+                                                             : EffectViewWithoutForegroundVibrancy);
   NSView* effectView = [[EffectViewClass alloc] initWithFrame:NSZeroRect];
   [effectView performSelector:@selector(setAppearance:)
                    withObject:AppearanceForVibrancyType(aType)];
diff --git a/widget/cocoa/mozView.h b/widget/cocoa/mozView.h
index 9e94e3ab4..bd054893b 100644
--- a/widget/cocoa/mozView.h
+++ b/widget/cocoa/mozView.h
@@ -34,11 +34,6 @@ class TextInputHandler;
   // return a context menu for this view
 - (NSMenu*)contextMenu;
 
-  // Allows callers to do a delayed invalidate (e.g., if an invalidate
-  // happens during drawing)
-- (void)setNeedsPendingDisplay;
-- (void)setNeedsPendingDisplayInRect:(NSRect)invalidRect;
-
   // called when our corresponding Gecko view goes away
 - (void)widgetDestroyed;
 
diff --git a/widget/cocoa/nsChildView.h b/widget/cocoa/nsChildView.h
index f6fb44633..2817c8d41 100644
--- a/widget/cocoa/nsChildView.h
+++ b/widget/cocoa/nsChildView.h
@@ -56,6 +56,8 @@ class WidgetRenderingContext;
 } // namespace widget
 } // namespace mozilla
 
+@class PixelHostingView;
+
 @interface NSEvent (Undocumented)
 
 // Return Cocoa event's corresponding Carbon event.  Not initialized (on
@@ -139,11 +141,6 @@ class WidgetRenderingContext;
   // when acceptsFirstMouse: is called, we store the event here (strong)
   NSEvent* mClickThroughMouseDownEvent;
 
-  // rects that were invalidated during a draw, so have pending drawing
-  NSMutableArray* mPendingDirtyRects;
-  BOOL mPendingFullDisplay;
-  BOOL mPendingDisplay;
-
   // WheelStart/Stop events should always come in pairs. This BOOL records the
   // last received event so that, when we receive one of the events, we make sure
   // to send its pair event first, in case we didn't yet for any reason.
@@ -185,8 +182,6 @@ class WidgetRenderingContext;
   float mCumulativeMagnification;
   float mCumulativeRotation;
 
-  BOOL mWaitingForPaint;
-
 #ifdef __LP64__
   // Support for fluid swipe tracking.
   BOOL* mCancelSwipeAnimation;
@@ -198,6 +193,15 @@ class WidgetRenderingContext;
   // The mask image that's used when painting into the titlebar using basic
   // CGContext painting (i.e. non-accelerated).
   CGImageRef mTopLeftCornerMask;
+
+  // Subviews of self, which act as container views for vibrancy views and
+  // non-draggable views.
+  NSView* mVibrancyViewsContainer;      // [STRONG]
+  NSView* mNonDraggableViewsContainer;  // [STRONG]
+
+  // The view that does our drawing. This is a subview of self so that it can
+  // be ordered on top of mVibrancyViewsContainer.
+  PixelHostingView* mPixelHostingView;
 }
 
 // class initialization
@@ -226,6 +230,10 @@ class WidgetRenderingContext;
 - (bool)preRender:(NSOpenGLContext *)aGLContext;
 - (void)postRender:(NSOpenGLContext *)aGLContext;
 
+- (NSView*)vibrancyViewsContainer;
+- (NSView*)nonDraggableViewsContainer;
+- (NSView*)pixelHostingView;
+
 - (BOOL)isCoveringTitlebar;
 
 - (void)viewWillStartLiveResize;
@@ -252,7 +260,6 @@ class WidgetRenderingContext;
 - (void)endGestureWithEvent:(NSEvent *)anEvent;
 
 - (void)scrollWheel:(NSEvent *)anEvent;
-- (void)handleAsyncScrollEvent:(CGEventRef)cgEvent ofType:(CGEventType)type;
 
 - (void)setUsingOMTCompositor:(BOOL)aUseOMTC;
 
@@ -507,8 +514,6 @@ public:
   void CleanupRemoteDrawing() override;
   bool InitCompositor(mozilla::layers::Compositor* aCompositor) override;
 
-  IAPZCTreeManager* APZCTM() { return mAPZC ; }
-
   NS_IMETHOD StartPluginIME(const mozilla::WidgetKeyboardEvent& aKeyboardEvent,
                             int32_t aPanelX, int32_t aPanelY,
                             nsString& aCommitted) override;
@@ -529,9 +534,6 @@ protected:
   void              ReportMoveEvent();
   void              ReportSizeEvent();
 
-  // override to create different kinds of child views. Autoreleases, so
-  // caller must retain.
-  virtual NSView*   CreateCocoaView(NSRect inFrame);
   void              TearDownView();
 
   virtual already_AddRefed<nsIWidget>
@@ -574,7 +576,7 @@ protected:
 
 protected:
 
-  NSView<mozView>*      mView;      // my parallel cocoa view (ChildView or NativeScrollbarView), [STRONG]
+  ChildView<mozView>* mView;  // my parallel cocoa view, [STRONG]
   RefPtr<mozilla::widget::TextInputHandler> mTextInputHandler;
   InputContext          mInputContext;
 
diff --git a/widget/cocoa/nsChildView.mm b/widget/cocoa/nsChildView.mm
index 1a257d899..868687fe1 100644
--- a/widget/cocoa/nsChildView.mm
+++ b/widget/cocoa/nsChildView.mm
@@ -146,7 +146,10 @@ bool gUserCancelledDrag = false;
 
 uint32_t nsChildView::sLastInputEventCount = 0;
 
-static uint32_t gNumberOfWidgetsNeedingEventThread = 0;
+// The view that will do our drawing or host our NSOpenGLContext or Core Animation layer.
+@interface PixelHostingView : NSView {
+}
+@end
 
 @interface ChildView(Private)
 
@@ -163,14 +166,9 @@ static uint32_t gNumberOfWidgetsNeedingEventThread = 0;
 
 - (BOOL)isRectObscuredBySubview:(NSRect)inRect;
 
-- (void)processPendingRedraws;
-
-- (void)drawRect:(NSRect)aRect inContext:(CGContextRef)aContext;
 - (LayoutDeviceIntRegion)nativeDirtyRegionWithBoundingRect:(NSRect)aRect;
-- (BOOL)isUsingMainThreadOpenGL;
 - (BOOL)isUsingOpenGL;
 - (void)drawUsingOpenGL;
-- (void)drawUsingOpenGLCallback;
 
 - (BOOL)hasRoundedBottomCorners;
 - (CGFloat)cornerRadius;
@@ -195,7 +193,6 @@ static uint32_t gNumberOfWidgetsNeedingEventThread = 0;
 
 - (LayoutDeviceIntPoint)convertWindowCoordinates:(NSPoint)aPoint;
 - (LayoutDeviceIntPoint)convertWindowCoordinatesRoundDown:(NSPoint)aPoint;
-- (IAPZCTreeManager*)apzctm;
 
 - (BOOL)inactiveWindowAcceptsMouseEvent:(NSEvent*)aEvent;
 - (void)updateWindowDraggableState;
@@ -204,26 +201,10 @@ static uint32_t gNumberOfWidgetsNeedingEventThread = 0;
 
 @end
 
-@interface EventThreadRunner : NSObject
-{
-  NSThread* mThread;
-}
-- (id)init;
-
-+ (void)start;
-+ (void)stop;
-
-@end
-
 @interface NSView(NSThemeFrameCornerRadius)
 - (float)roundedCornerRadius;
 @end
 
-@interface NSView(DraggableRegion)
-- (CGSRegionObj)_regionForOpaqueDescendants:(NSRect)aRect forMove:(BOOL)aForMove;
-- (CGSRegionObj)_regionForOpaqueDescendants:(NSRect)aRect forMove:(BOOL)aForMove forUnderTitlebar:(BOOL)aForUnderTitlebar;
-@end
-
 @interface NSWindow(NSWindowShouldZoomOnDoubleClick)
 + (BOOL)_shouldZoomOnDoubleClick; // present on 10.7 and above
 @end
@@ -380,13 +361,6 @@ nsChildView::~nsChildView()
 
   DestroyCompositor();
 
-  if (mAPZC && gfxPrefs::AsyncPanZoomSeparateEventThread()) {
-    gNumberOfWidgetsNeedingEventThread--;
-    if (gNumberOfWidgetsNeedingEventThread == 0) {
-      [EventThreadRunner stop];
-    }
-  }
-
   // An nsChildView object that was in use can be destroyed without Destroy()
   // ever being called on it.  So we also need to do a quick, safe cleanup
   // here (it's too late to just call Destroy(), which can cause crashes).
@@ -455,7 +429,8 @@ nsChildView::Create(nsIWidget* aParent,
   // that NS_NATIVE_WIDGET is the NSView.
   CGFloat scaleFactor = nsCocoaUtils::GetBackingScaleFactor(mParentView);
   NSRect r = nsCocoaUtils::DevPixelsToCocoaPoints(mBounds, scaleFactor);
-  mView = [(NSView<mozView>*)CreateCocoaView(r) retain];
+  mView = [[[[ChildView alloc] initWithFrame:r geckoChild:this] autorelease] retain];
+  
   if (!mView) {
     return NS_ERROR_FAILURE;
   }
@@ -488,17 +463,6 @@ nsChildView::Create(nsIWidget* aParent,
   NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
 }
 
-// Creates the appropriate child view. Override to create something other than
-// our |ChildView| object. Autoreleases, so caller must retain.
-NSView*
-nsChildView::CreateCocoaView(NSRect inFrame)
-{
-  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
-
-  return [[[ChildView alloc] initWithFrame:inFrame geckoChild:this] autorelease];
-
-  NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
-}
 
 void nsChildView::TearDownView()
 {
@@ -982,8 +946,9 @@ NS_IMETHODIMP nsChildView::Resize(double aWidth, double aHeight, bool aRepaint)
     [mView setFrame:DevPixelsToCocoaPoints(mBounds)];
   });
 
-  if (mVisible && aRepaint)
-    [mView setNeedsDisplay:YES];
+  if (mVisible && aRepaint) {
+    [[mView pixelHostingView] setNeedsDisplay:YES];
+  }
 
   NotifyRollupGeometryChange();
   ReportSizeEvent();
@@ -1021,8 +986,9 @@ NS_IMETHODIMP nsChildView::Resize(double aX, double aY,
     [mView setFrame:DevPixelsToCocoaPoints(mBounds)];
   });
 
-  if (mVisible && aRepaint)
-    [mView setNeedsDisplay:YES];
+  if (mVisible && aRepaint) {
+    [[mView pixelHostingView] setNeedsDisplay:YES];
+  }
 
   NotifyRollupGeometryChange();
   if (isMoving) {
@@ -1341,14 +1307,7 @@ NS_IMETHODIMP nsChildView::Invalidate(const LayoutDeviceIntRect& aRect)
   NS_ASSERTION(GetLayerManager()->GetBackendType() != LayersBackend::LAYERS_CLIENT,
                "Shouldn't need to invalidate with accelerated OMTC layers!");
 
-  if ([NSView focusView]) {
-    // if a view is focussed (i.e. being drawn), then postpone the invalidate so that we
-    // don't lose it.
-    [mView setNeedsPendingDisplayInRect:DevPixelsToCocoaPoints(aRect)];
-  }
-  else {
-    [mView setNeedsDisplayInRect:DevPixelsToCocoaPoints(aRect)];
-  }
+  [[mView pixelHostingView] setNeedsDisplayInRect:DevPixelsToCocoaPoints(aRect)];
 
   return NS_OK;
 
@@ -1920,13 +1879,6 @@ void
 nsChildView::ConfigureAPZCTreeManager()
 {
   nsBaseWidget::ConfigureAPZCTreeManager();
-
-  if (gfxPrefs::AsyncPanZoomSeparateEventThread()) {
-    if (gNumberOfWidgetsNeedingEventThread == 0) {
-      [EventThreadRunner start];
-    }
-    gNumberOfWidgetsNeedingEventThread++;
-  }
 }
 
 void
@@ -2557,14 +2509,6 @@ nsChildView::UpdateVibrancy(const nsTArray<ThemeGeometry>& aThemeGeometries)
   vm.UpdateVibrantRegion(VibrancyType::DARK, vibrantDarkRegion);
 }
 
-void
-nsChildView::ClearVibrantAreas()
-{
-  if (VibrancyManager::SystemSupportsVibrancy()) {
-    EnsureVibrancyManager().ClearVibrantAreas();
-  }
-}
-
 static VibrancyType
 ThemeGeometryTypeToVibrancyType(nsITheme::ThemeGeometryType aThemeGeometryType)
 {
@@ -2617,7 +2561,7 @@ nsChildView::EnsureVibrancyManager()
 {
   MOZ_ASSERT(mView, "Only call this once we have a view!");
   if (!mVibrancyManager) {
-    mVibrancyManager = MakeUnique<VibrancyManager>(*this, mView);
+    mVibrancyManager = MakeUnique<VibrancyManager>(*this, [mView vibrancyViewsContainer]);
   }
   return *mVibrancyManager;
 }
@@ -2787,9 +2731,10 @@ nsChildView::UpdateWindowDraggingRegion(const LayoutDeviceIntRegion& aRegion)
 
   // Suppress calls to setNeedsDisplay during NSView geometry changes.
   ManipulateViewWithoutNeedingDisplay(mView, ^() {
-    changed = mNonDraggableRegion.UpdateRegion(nonDraggable, *this, mView, ^() {
-      return [[NonDraggableView alloc] initWithFrame:NSZeroRect];
-    });
+    changed = mNonDraggableRegion.UpdateRegion(
+        nonDraggable, *this, [mView nonDraggableViewsContainer], ^() {
+          return [[NonDraggableView alloc] initWithFrame:NSZeroRect];
+        });
   });
 
   if (changed) {
@@ -3160,6 +3105,31 @@ private:
 
 #pragma mark -
 
+// ViewRegionContainerView is a view class for certain subviews of ChildView
+// which contain the NSViews created for ViewRegions (see ViewRegion.h).
+// It doesn't do anything interesting, it only acts as a container so that it's
+// easier for ChildView to control the z order of its children.
+@interface ViewRegionContainerView : NSView {
+}
+@end
+
+@implementation ViewRegionContainerView
+
+- (NSView*)hitTest:(NSPoint)aPoint {
+  return nil;  // Be transparent to mouse events.
+}
+
+- (BOOL)isFlipped {
+  return [[self superview] isFlipped];
+}
+
+- (BOOL)mouseDownCanMoveWindow {
+  return [[self superview] mouseDownCanMoveWindow];
+}
+
+@end
+;
+
 @implementation ChildView
 
 // globalDragPboard is non-null during native drag sessions that did not originate
@@ -3215,7 +3185,6 @@ NSEvent* gLastDragMouseDownEvent = nil;
 
   if ((self = [super initWithFrame:inFrame])) {
     mGeckoChild = inChild;
-    mPendingDisplay = NO;
     mBlockedLastMouseDown = NO;
     mExpectingWheelStop = NO;
 
@@ -3236,6 +3205,20 @@ NSEvent* gLastDragMouseDownEvent = nil;
     mCancelSwipeAnimation = nil;
 #endif
 
+    mNonDraggableViewsContainer = [[ViewRegionContainerView alloc] initWithFrame:[self bounds]];
+    mVibrancyViewsContainer = [[ViewRegionContainerView alloc] initWithFrame:[self bounds]];
+
+    [mNonDraggableViewsContainer setAutoresizingMask:NSViewWidthSizable | NSViewHeightSizable];
+    [mVibrancyViewsContainer setAutoresizingMask:NSViewWidthSizable | NSViewHeightSizable];
+
+    [self addSubview:mNonDraggableViewsContainer];
+    [self addSubview:mVibrancyViewsContainer];
+
+    mPixelHostingView = [[PixelHostingView alloc] initWithFrame:[self bounds]];
+    [mPixelHostingView setAutoresizingMask:NSViewWidthSizable | NSViewHeightSizable];
+
+    [self addSubview:mPixelHostingView];
+
     mTopLeftCornerMask = NULL;
   }
 
@@ -3250,10 +3233,9 @@ NSEvent* gLastDragMouseDownEvent = nil;
                                            selector:@selector(systemMetricsChanged)
                                                name:NSSystemColorsDidChangeNotification
                                              object:nil];
-  // TODO: replace the string with the constant once we build with the 10.7 SDK
   [[NSNotificationCenter defaultCenter] addObserver:self
                                            selector:@selector(scrollbarSystemMetricChanged)
-                                               name:@"NSPreferredScrollerStyleDidChangeNotification"
+                                               name:NSPreferredScrollerStyleDidChangeNotification
                                              object:nil];
   [[NSDistributedNotificationCenter defaultCenter] addObserver:self
                                                       selector:@selector(systemMetricsChanged)
@@ -3263,7 +3245,7 @@ NSEvent* gLastDragMouseDownEvent = nil;
   [[NSNotificationCenter defaultCenter] addObserver:self
                                            selector:@selector(_surfaceNeedsUpdate:)
                                                name:NSViewGlobalFrameDidChangeNotification
-                                             object:self];
+                                             object:mPixelHostingView];
 
   return self;
 
@@ -3348,12 +3330,23 @@ NSEvent* gLastDragMouseDownEvent = nil;
   NS_OBJC_END_TRY_ABORT_BLOCK;
 }
 
+- (NSView*)vibrancyViewsContainer {
+  return mVibrancyViewsContainer;
+}
+
+- (NSView*)nonDraggableViewsContainer {
+  return mNonDraggableViewsContainer;
+}
+
+- (NSView*)pixelHostingView {
+  return mPixelHostingView;
+}
+
 - (void)dealloc
 {
   NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
 
   [mGLContext release];
-  [mPendingDirtyRects release];
   [mLastMouseDownEvent release];
   [mLastKeyDownEvent release];
   [mClickThroughMouseDownEvent release];
@@ -3362,6 +3355,12 @@ NSEvent* gLastDragMouseDownEvent = nil;
 
   [[NSNotificationCenter defaultCenter] removeObserver:self];
   [[NSDistributedNotificationCenter defaultCenter] removeObserver:self];
+  [mVibrancyViewsContainer removeFromSuperview];
+  [mVibrancyViewsContainer release];
+  [mNonDraggableViewsContainer removeFromSuperview];
+  [mNonDraggableViewsContainer release];
+  [mPixelHostingView removeFromSuperview];
+  [mPixelHostingView release];
 
   [super dealloc];
 
@@ -3408,82 +3407,6 @@ NSEvent* gLastDragMouseDownEvent = nil;
   }
 }
 
-- (void)setNeedsPendingDisplay
-{
-  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
-
-  mPendingFullDisplay = YES;
-  if (!mPendingDisplay) {
-    [self performSelector:@selector(processPendingRedraws) withObject:nil afterDelay:0];
-    mPendingDisplay = YES;
-  }
-
-  NS_OBJC_END_TRY_ABORT_BLOCK;
-}
-
-- (void)setNeedsPendingDisplayInRect:(NSRect)invalidRect
-{
-  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
-
-  if (!mPendingDirtyRects)
-    mPendingDirtyRects = [[NSMutableArray alloc] initWithCapacity:1];
-  [mPendingDirtyRects addObject:[NSValue valueWithRect:invalidRect]];
-  if (!mPendingDisplay) {
-    [self performSelector:@selector(processPendingRedraws) withObject:nil afterDelay:0];
-    mPendingDisplay = YES;
-  }
-
-  NS_OBJC_END_TRY_ABORT_BLOCK;
-}
-
-// Clears the queue of any pending invalides
-- (void)processPendingRedraws
-{
-  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
-
-  if (mPendingFullDisplay) {
-    [self setNeedsDisplay:YES];
-  }
-  else if (mPendingDirtyRects) {
-    unsigned int count = [mPendingDirtyRects count];
-    for (unsigned int i = 0; i < count; ++i) {
-      [self setNeedsDisplayInRect:[[mPendingDirtyRects objectAtIndex:i] rectValue]];
-    }
-  }
-  mPendingFullDisplay = NO;
-  mPendingDisplay = NO;
-  [mPendingDirtyRects release];
-  mPendingDirtyRects = nil;
-
-  NS_OBJC_END_TRY_ABORT_BLOCK;
-}
-
-- (void)setNeedsDisplayInRect:(NSRect)aRect
-{
-  if (![self isUsingOpenGL]) {
-    [super setNeedsDisplayInRect:aRect];
-    return;
-  }
-
-  if ([[self window] isVisible] && [self isUsingMainThreadOpenGL]) {
-    // Draw without calling drawRect. This prevent us from
-    // needing to access the normal window buffer surface unnecessarily, so we
-    // waste less time synchronizing the two surfaces. (These synchronizations
-    // show up in a profiler as CGSDeviceLock / _CGSLockWindow /
-    // _CGSSynchronizeWindowBackingStore.) It also means that Cocoa doesn't
-    // have any potentially expensive invalid rect management for us.
-    if (!mWaitingForPaint) {
-      mWaitingForPaint = YES;
-      // Use NSRunLoopCommonModes instead of the default NSDefaultRunLoopMode
-      // so that the timer also fires while a native menu is open.
-      [self performSelector:@selector(drawUsingOpenGLCallback)
-                 withObject:nil
-                 afterDelay:0
-                    inModes:[NSArray arrayWithObject:NSRunLoopCommonModes]];
-    }
-  }
-}
-
 - (NSString*)description
 {
   NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
@@ -3537,25 +3460,6 @@ NSEvent* gLastDragMouseDownEvent = nil;
   return YES;
 }
 
-- (void)scrollRect:(NSRect)aRect by:(NSSize)offset
-{
-  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
-
-  // Update any pending dirty rects to reflect the new scroll position
-  if (mPendingDirtyRects) {
-    unsigned int count = [mPendingDirtyRects count];
-    for (unsigned int i = 0; i < count; ++i) {
-      NSRect oldRect = [[mPendingDirtyRects objectAtIndex:i] rectValue];
-      NSRect newRect = NSOffsetRect(oldRect, offset.width, offset.height);
-      [mPendingDirtyRects replaceObjectAtIndex:i
-                                    withObject:[NSValue valueWithRect:newRect]];
-    }
-  }
-  [super scrollRect:aRect by:offset];
-
-  NS_OBJC_END_TRY_ABORT_BLOCK;
-}
-
 - (BOOL)mouseDownCanMoveWindow
 {
   // Return YES so that parts of this view can be draggable. The non-draggable
@@ -3567,7 +3471,7 @@ NSEvent* gLastDragMouseDownEvent = nil;
 
 -(void)updateGLContext
 {
-  [mGLContext setView:self];
+  [mGLContext setView:mPixelHostingView];
   [mGLContext update];
 }
 
@@ -3580,11 +3484,6 @@ NSEvent* gLastDragMouseDownEvent = nil;
   }
 }
 
-- (BOOL)wantsBestResolutionOpenGLSurface
-{
-  return nsCocoaUtils::HiDPIEnabled() ? YES : NO;
-}
-
 - (void)viewDidChangeBackingProperties
 {
   [super viewDidChangeBackingProperties];
@@ -3646,7 +3545,7 @@ NSEvent* gLastDragMouseDownEvent = nil;
   LayoutDeviceIntRect boundingRect = mGeckoChild->CocoaPointsToDevPixels(aRect);
   const NSRect *rects;
   NSInteger count;
-  [self getRectsBeingDrawn:&rects count:&count];
+  [mPixelHostingView getRectsBeingDrawn:&rects count:&count];
 
   if (count > MAX_RECTS_IN_REGION) {
     return boundingRect;
@@ -3662,53 +3561,34 @@ NSEvent* gLastDragMouseDownEvent = nil;
 
 // The display system has told us that a portion of our view is dirty. Tell
 // gecko to paint it
-- (void)drawRect:(NSRect)aRect
+// This method is called from mPixelHostingView's drawRect handler.
+- (void)doDrawRect:(NSRect)aRect
 {
-  CGContextRef cgContext = (CGContextRef)[[NSGraphicsContext currentContext] graphicsPort];
-  [self drawRect:aRect inContext:cgContext];
-
-  // If we're a transparent window and our contents have changed, we need
-  // to make sure the shadow is updated to the new contents.
-  if ([[self window] isKindOfClass:[BaseWindow class]]) {
-    [(BaseWindow*)[self window] deferredInvalidateShadow];
+  if (!NS_IsMainThread()) {
+    // In the presence of CoreAnimation, this method can sometimes be called on
+    // a non-main thread. Ignore those calls because Gecko can only react to
+    // them on the main thread.
+    return;
   }
-}
 
-- (void)drawRect:(NSRect)aRect inContext:(CGContextRef)aContext
-{
   if (!mGeckoChild || !mGeckoChild->IsVisible())
     return;
-
-#ifdef DEBUG_UPDATE
-  LayoutDeviceIntRect geckoBounds = mGeckoChild->GetBounds();
-
-  fprintf (stderr, "---- Update[%p][%p] [%f %f %f %f] cgc: %p\n  gecko bounds: [%d %d %d %d]\n",
-           self, mGeckoChild,
-           aRect.origin.x, aRect.origin.y, aRect.size.width, aRect.size.height, aContext,
-           geckoBounds.x, geckoBounds.y, geckoBounds.width, geckoBounds.height);
-
-  CGAffineTransform xform = CGContextGetCTM(aContext);
-  fprintf (stderr, "  xform in: [%f %f %f %f %f %f]\n", xform.a, xform.b, xform.c, xform.d, xform.tx, xform.ty);
-#endif
+  CGContextRef cgContext = (CGContextRef)[[NSGraphicsContext currentContext] graphicsPort];
 
   if ([self isUsingOpenGL]) {
-    // For Gecko-initiated repaints in OpenGL mode, drawUsingOpenGL is
-    // directly called from a delayed perform callback - without going through
-    // drawRect.
-    // Paints that come through here are triggered by something that Cocoa
-    // controls, for example by window resizing or window focus changes.
-
     // Since this view is usually declared as opaque, the window's pixel
     // buffer may now contain garbage which we need to prevent from reaching
     // the screen. The only place where garbage can show is in the window
     // corners and the vibrant regions of the window - the rest of the window
     // is covered by opaque content in our OpenGL surface.
     // So we need to clear the pixel buffer contents in these areas.
-    mGeckoChild->ClearVibrantAreas();
     [self clearCorners];
 
-    // Do GL composition and return.
-    [self drawUsingOpenGL];
+    // Force a sync OMTC composite into the OpenGL context and return.
+    LayoutDeviceIntRect geckoBounds = mGeckoChild->GetBounds();
+    LayoutDeviceIntRegion region(geckoBounds);
+
+    mGeckoChild->PaintWindow(region);
     return;
   }
 
@@ -3720,54 +3600,31 @@ NSEvent* gLastDragMouseDownEvent = nil;
   // multiple dev pixels. But Gecko expects its supplied context to be scaled
   // to device pixels, so we need to reverse the scaling.
   double scale = mGeckoChild->BackingScaleFactor();
-  CGContextSaveGState(aContext);
-  CGContextScaleCTM(aContext, 1.0 / scale, 1.0 / scale);
+  CGContextSaveGState(cgContext);
+  CGContextScaleCTM(cgContext, 1.0 / scale, 1.0 / scale);
 
   NSSize viewSize = [self bounds].size;
   gfx::IntSize backingSize = gfx::IntSize::Truncate(viewSize.width * scale, viewSize.height * scale);
   LayoutDeviceIntRegion region = [self nativeDirtyRegionWithBoundingRect:aRect];
 
-  bool painted = mGeckoChild->PaintWindowInContext(aContext, region, backingSize);
+  bool painted = mGeckoChild->PaintWindowInContext(cgContext, region, backingSize);
 
   // Undo the scale transform so that from now on the context is in
   // CocoaPoints again.
-  CGContextRestoreGState(aContext);
+  CGContextRestoreGState(cgContext);
 
-  if (!painted && [self isOpaque]) {
+  if (!painted && [mPixelHostingView isOpaque]) {
     // Gecko refused to draw, but we've claimed to be opaque, so we have to
     // draw something--fill with white.
-    CGContextSetRGBFillColor(aContext, 1, 1, 1, 1);
-    CGContextFillRect(aContext, NSRectToCGRect(aRect));
+    CGContextSetRGBFillColor(cgContext, 1, 1, 1, 1);
+    CGContextFillRect(cgContext, NSRectToCGRect(aRect));
   }
 
   if ([self isCoveringTitlebar]) {
     [self drawTitleString];
     [self drawTitlebarHighlight];
-    [self maskTopCornersInContext:aContext];
+    [self maskTopCornersInContext:cgContext];
   }
-
-#ifdef DEBUG_UPDATE
-  fprintf (stderr, "---- update done ----\n");
-
-#if 0
-  CGContextSetRGBStrokeColor (aContext,
-                            ((((unsigned long)self) & 0xff)) / 255.0,
-                            ((((unsigned long)self) & 0xff00) >> 8) / 255.0,
-                            ((((unsigned long)self) & 0xff0000) >> 16) / 255.0,
-                            0.5);
-#endif
-  CGContextSetRGBStrokeColor(aContext, 1, 0, 0, 0.8);
-  CGContextSetLineWidth(aContext, 4.0);
-  CGContextStrokeRect(aContext, NSRectToCGRect(aRect));
-#endif
-}
-
-- (BOOL)isUsingMainThreadOpenGL
-{
-  if (!mGeckoChild || ![self window])
-    return NO;
-
-  return mGeckoChild->GetLayerManager(nullptr)->GetBackendType() == mozilla::layers::LayersBackend::LAYERS_OPENGL;
 }
 
 - (BOOL)isUsingOpenGL
@@ -3775,33 +3632,9 @@ NSEvent* gLastDragMouseDownEvent = nil;
   if (!mGeckoChild || ![self window])
     return NO;
 
-  return mGLContext || mUsingOMTCompositor || [self isUsingMainThreadOpenGL];
-}
-
-- (void)drawUsingOpenGL
-{
-  PROFILER_LABEL("ChildView", "drawUsingOpenGL",
-    js::ProfileEntry::Category::GRAPHICS);
-
-  if (![self isUsingOpenGL] || !mGeckoChild->IsVisible())
-    return;
-
-  mWaitingForPaint = NO;
-
-  LayoutDeviceIntRect geckoBounds = mGeckoChild->GetBounds();
-  LayoutDeviceIntRegion region(geckoBounds);
-
-  mGeckoChild->PaintWindow(region);
+  return mGLContext || mUsingOMTCompositor;
 }
 
-// Called asynchronously after setNeedsDisplay in order to avoid entering the
-// normal drawing machinery.
-- (void)drawUsingOpenGLCallback
-{
-  if (mWaitingForPaint) {
-    [self drawUsingOpenGL];
-  }
-}
 
 - (BOOL)hasRoundedBottomCorners
 {
@@ -4803,12 +4636,6 @@ GetIntegerDeltaForEvent(NSEvent* aEvent)
 {
   NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
 
-  if (gfxPrefs::AsyncPanZoomSeparateEventThread() && [self apzctm]) {
-    // Disable main-thread scrolling completely when using APZ with the
-    // separate event thread. This is bug 1013412.
-    return;
-  }
-
   nsAutoRetainCocoaObject kungFuDeathGrip(self);
 
   ChildViewMouseTracker::MouseScrolled(theEvent);
@@ -4928,105 +4755,6 @@ GetIntegerDeltaForEvent(NSEvent* aEvent)
   NS_OBJC_END_TRY_ABORT_BLOCK;
 }
 
-- (void)handleAsyncScrollEvent:(CGEventRef)cgEvent ofType:(CGEventType)type
-{
-  IAPZCTreeManager* apzctm = [self apzctm];
-  if (!apzctm) {
-    return;
-  }
-
-  CGPoint loc = CGEventGetLocation(cgEvent);
-  loc.y = nsCocoaUtils::FlippedScreenY(loc.y);
-  NSPoint locationInWindow =
-    nsCocoaUtils::ConvertPointFromScreen([self window], NSPointFromCGPoint(loc));
-  ScreenIntPoint location = ViewAs<ScreenPixel>(
-    [self convertWindowCoordinates:locationInWindow],
-    PixelCastJustification::LayoutDeviceIsScreenForUntransformedEvent);
-
-  static NSTimeInterval sStartTime = [NSDate timeIntervalSinceReferenceDate];
-  static TimeStamp sStartTimeStamp = TimeStamp::Now();
-
-  if (type == kCGEventScrollWheel) {
-    NSEvent* event = [NSEvent eventWithCGEvent:cgEvent];
-    NSEventPhase phase = nsCocoaUtils::EventPhase(event);
-    NSEventPhase momentumPhase = nsCocoaUtils::EventMomentumPhase(event);
-    CGFloat pixelDeltaX = 0, pixelDeltaY = 0;
-    nsCocoaUtils::GetScrollingDeltas(event, &pixelDeltaX, &pixelDeltaY);
-    uint32_t eventTime = ([event timestamp] - sStartTime) * 1000;
-    TimeStamp eventTimeStamp = sStartTimeStamp +
-      TimeDuration::FromSeconds([event timestamp] - sStartTime);
-    NSPoint locationInWindowMoved = NSMakePoint(
-      locationInWindow.x + pixelDeltaX,
-      locationInWindow.y - pixelDeltaY);
-    ScreenIntPoint locationMoved = ViewAs<ScreenPixel>(
-      [self convertWindowCoordinates:locationInWindowMoved],
-      PixelCastJustification::LayoutDeviceIsScreenForUntransformedEvent);
-    ScreenPoint delta = ScreenPoint(locationMoved - location);
-    ScrollableLayerGuid guid;
-
-    // MayBegin and Cancelled are dispatched when the fingers start or stop
-    // touching the touchpad before any scrolling has occurred. These events
-    // can be used to control scrollbar visibility or interrupt scroll
-    // animations. They are only dispatched on 10.8 or later, and only by
-    // relatively modern devices.
-    if (phase == NSEventPhaseMayBegin) {
-      PanGestureInput panInput(PanGestureInput::PANGESTURE_MAYSTART, eventTime,
-                               eventTimeStamp, location, ScreenPoint(0, 0), 0);
-      apzctm->ReceiveInputEvent(panInput, &guid, nullptr);
-      return;
-    }
-    if (phase == NSEventPhaseCancelled) {
-      PanGestureInput panInput(PanGestureInput::PANGESTURE_CANCELLED, eventTime,
-                               eventTimeStamp, location, ScreenPoint(0, 0), 0);
-      apzctm->ReceiveInputEvent(panInput, &guid, nullptr);
-      return;
-    }
-
-    // Legacy scroll events are dispatched by devices that do not have a
-    // concept of a scroll gesture, for example by USB mice with
-    // traditional mouse wheels.
-    // For these kinds of scrolls, we want to surround every single scroll
-    // event with a PANGESTURE_START and a PANGESTURE_END event. The APZC
-    // needs to know that the real scroll gesture can end abruptly after any
-    // one of these events.
-    bool isLegacyScroll = (phase == NSEventPhaseNone &&
-      momentumPhase == NSEventPhaseNone && delta != ScreenPoint(0, 0));
-
-    if (phase == NSEventPhaseBegan || isLegacyScroll) {
-      PanGestureInput panInput(PanGestureInput::PANGESTURE_START, eventTime,
-                               eventTimeStamp, location, ScreenPoint(0, 0), 0);
-      apzctm->ReceiveInputEvent(panInput, &guid, nullptr);
-    }
-    if (momentumPhase == NSEventPhaseNone && delta != ScreenPoint(0, 0)) {
-      PanGestureInput panInput(PanGestureInput::PANGESTURE_PAN, eventTime,
-                               eventTimeStamp, location, delta, 0);
-      apzctm->ReceiveInputEvent(panInput, &guid, nullptr);
-    }
-    if (phase == NSEventPhaseEnded || isLegacyScroll) {
-      PanGestureInput panInput(PanGestureInput::PANGESTURE_END, eventTime,
-                               eventTimeStamp, location, ScreenPoint(0, 0), 0);
-      apzctm->ReceiveInputEvent(panInput, &guid, nullptr);
-    }
-
-    // Any device that can dispatch momentum events supports all three momentum phases.
-    if (momentumPhase == NSEventPhaseBegan) {
-      PanGestureInput panInput(PanGestureInput::PANGESTURE_MOMENTUMSTART, eventTime,
-                               eventTimeStamp, location, ScreenPoint(0, 0), 0);
-      apzctm->ReceiveInputEvent(panInput, &guid, nullptr);
-    }
-    if (momentumPhase == NSEventPhaseChanged && delta != ScreenPoint(0, 0)) {
-      PanGestureInput panInput(PanGestureInput::PANGESTURE_MOMENTUMPAN, eventTime,
-                               eventTimeStamp, location, delta, 0);
-      apzctm->ReceiveInputEvent(panInput, &guid, nullptr);
-    }
-    if (momentumPhase == NSEventPhaseEnded) {
-      PanGestureInput panInput(PanGestureInput::PANGESTURE_MOMENTUMEND, eventTime,
-                               eventTimeStamp, location, ScreenPoint(0, 0), 0);
-      apzctm->ReceiveInputEvent(panInput, &guid, nullptr);
-    }
-  }
-}
-
 -(NSMenu*)menuForEvent:(NSEvent*)theEvent
 {
   NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
@@ -5571,11 +5299,6 @@ GetIntegerDeltaForEvent(NSEvent* aEvent)
   return mGeckoChild->CocoaPointsToDevPixelsRoundDown(localPoint);
 }
 
-- (IAPZCTreeManager*)apzctm
-{
-  return mGeckoChild ? mGeckoChild->APZCTM() : nullptr;
-}
-
 // This is a utility function used by NSView drag event methods
 // to send events. It contains all of the logic needed for Gecko
 // dragging to work. Returns the appropriate cocoa drag operation code.
@@ -6209,6 +5932,26 @@ nsChildView::GetSelectionAsPlaintext(nsAString& aResult)
 
 @end
 
+@implementation PixelHostingView
+
+- (BOOL)isFlipped {
+  return YES;
+}
+
+- (NSView*)hitTest:(NSPoint)aPoint {
+  return nil;
+}
+
+- (void)drawRect:(NSRect)aRect {
+  [(ChildView*)[self superview] doDrawRect:aRect];
+}
+
+- (BOOL)wantsBestResolutionOpenGLSurface {
+  return nsCocoaUtils::HiDPIEnabled() ? YES : NO;
+}
+
+@end
+
 #pragma mark -
 
 void
@@ -6377,106 +6120,6 @@ ChildViewMouseTracker::WindowAcceptsEvent(NSWindow* aWindow, NSEvent* aEvent,
 
 #pragma mark -
 
-@interface EventThreadRunner(Private)
-- (void)runEventThread;
-- (void)shutdownAndReleaseCalledOnEventThread;
-- (void)shutdownAndReleaseCalledOnAnyThread;
-- (void)handleEvent:(CGEventRef)cgEvent type:(CGEventType)type;
-@end
-
-static EventThreadRunner* sEventThreadRunner = nil;
-
-@implementation EventThreadRunner
-
-+ (void)start
-{
-  sEventThreadRunner = [[EventThreadRunner alloc] init];
-}
-
-+ (void)stop
-{
-  if (sEventThreadRunner) {
-    [sEventThreadRunner shutdownAndReleaseCalledOnAnyThread];
-    sEventThreadRunner = nil;
-  }
-}
-
-- (id)init
-{
-  if ((self = [super init])) {
-    mThread = nil;
-    [NSThread detachNewThreadSelector:@selector(runEventThread)
-                             toTarget:self
-                           withObject:nil];
-  }
-  return self;
-}
-
-static CGEventRef
-HandleEvent(CGEventTapProxy aProxy, CGEventType aType,
-            CGEventRef aEvent, void* aClosure)
-{
-  [(EventThreadRunner*)aClosure handleEvent:aEvent type:aType];
-  return aEvent;
-}
-
-- (void)runEventThread
-{
-  char aLocal;
-  profiler_register_thread("APZC Event Thread", &aLocal);
-  PR_SetCurrentThreadName("APZC Event Thread");
-
-  mThread = [NSThread currentThread];
-  ProcessSerialNumber currentProcess;
-  GetCurrentProcess(&currentProcess);
-  CFMachPortRef eventPort =
-    CGEventTapCreateForPSN(&currentProcess,
-                           kCGHeadInsertEventTap,
-                           kCGEventTapOptionListenOnly,
-                           CGEventMaskBit(kCGEventScrollWheel),
-                           HandleEvent,
-                           self);
-  CFRunLoopSourceRef eventPortSource =
-    CFMachPortCreateRunLoopSource(kCFAllocatorSystemDefault, eventPort, 0);
-  CFRunLoopAddSource(CFRunLoopGetCurrent(), eventPortSource, kCFRunLoopCommonModes);
-  CFRunLoopRun();
-  CFRunLoopRemoveSource(CFRunLoopGetCurrent(), eventPortSource, kCFRunLoopCommonModes);
-  CFRelease(eventPortSource);
-  CFRelease(eventPort);
-  [self release];
-}
-
-- (void)shutdownAndReleaseCalledOnEventThread
-{
-  CFRunLoopStop(CFRunLoopGetCurrent());
-}
-
-- (void)shutdownAndReleaseCalledOnAnyThread
-{
-  [self performSelector:@selector(shutdownAndReleaseCalledOnEventThread) onThread:mThread withObject:nil waitUntilDone:NO];
-}
-
-static const CGEventField kCGWindowNumberField = (const CGEventField) 51;
-
-// Called on scroll thread
-- (void)handleEvent:(CGEventRef)cgEvent type:(CGEventType)type
-{
-  if (type != kCGEventScrollWheel) {
-    return;
-  }
-
-  int windowNumber = CGEventGetIntegerValueField(cgEvent, kCGWindowNumberField);
-  NSWindow* window = [NSApp windowWithWindowNumber:windowNumber];
-  if (!window || ![window isKindOfClass:[BaseWindow class]]) {
-    return;
-  }
-
-  ChildView* childView = [(BaseWindow*)window mainChildView];
-  [childView handleAsyncScrollEvent:cgEvent ofType:type];
-}
-
-@end
-
 @interface NSView (MethodSwizzling)
 - (BOOL)nsChildView_NSView_mouseDownCanMoveWindow;
 @end
diff --git a/widget/cocoa/nsCocoaFeatures.h b/widget/cocoa/nsCocoaFeatures.h
index 984dae80e..7ebbe759f 100644
--- a/widget/cocoa/nsCocoaFeatures.h
+++ b/widget/cocoa/nsCocoaFeatures.h
@@ -24,6 +24,7 @@ public:
   static bool OnHighSierraOrLater();
   static bool OnMojaveOrLater();
   static bool OnCatalinaOrLater();
+  static bool OnBigSurOrLater();
 
   static bool IsAtLeastVersion(int32_t aMajor, int32_t aMinor, int32_t aBugFix=0);
 
diff --git a/widget/cocoa/nsCocoaFeatures.mm b/widget/cocoa/nsCocoaFeatures.mm
index 065260837..0b22c51bd 100644
--- a/widget/cocoa/nsCocoaFeatures.mm
+++ b/widget/cocoa/nsCocoaFeatures.mm
@@ -22,6 +22,8 @@
 #define MAC_OS_X_VERSION_10_13_HEX 0x000010D0
 #define MAC_OS_X_VERSION_10_14_HEX 0x000010E0
 #define MAC_OS_X_VERSION_10_15_HEX 0x000010F0
+#define MAC_OS_X_VERSION_10_16_HEX 0x000A1000
+#define MAC_OS_X_VERSION_11_0_HEX  0x000B0000
 
 #include "nsCocoaFeatures.h"
 #include "nsCocoaUtils.h"
@@ -189,6 +191,14 @@ nsCocoaFeatures::OnCatalinaOrLater()
 }
 
 /* static */ bool
+nsCocoaFeatures::OnBigSurOrLater() {
+  // Account for the version being 10.16 (which occurs when the
+  // application is linked with an older SDK) or 11.0 on Big Sur.
+  return ((OSXVersion() >= MAC_OS_X_VERSION_10_16_HEX) ||
+          (OSXVersion() >= MAC_OS_X_VERSION_11_0_HEX));
+}
+
+/* static */ bool
 nsCocoaFeatures::IsAtLeastVersion(int32_t aMajor, int32_t aMinor, int32_t aBugFix)
 {
     return OSXVersion() >= GetVersion(aMajor, aMinor, aBugFix);
diff --git a/widget/cocoa/nsCocoaWindow.h b/widget/cocoa/nsCocoaWindow.h
index 6338f474d..1913696b8 100644
--- a/widget/cocoa/nsCocoaWindow.h
+++ b/widget/cocoa/nsCocoaWindow.h
@@ -359,7 +359,8 @@ protected:
   nsresult             CreateNativeWindow(const NSRect &aRect,
                                           nsBorderStyle aBorderStyle,
                                           bool aRectIsFrameRect);
-  nsresult             CreatePopupContentView(const LayoutDeviceIntRect &aRect);
+  nsresult             CreatePopupContentView(const LayoutDeviceIntRect &aRect,
+                                              nsWidgetInitData* aInitData);
   void                 DestroyNativeWindow();
   void                 AdjustWindowShadow();
   void                 SetWindowBackgroundBlur();
@@ -416,6 +417,8 @@ protected:
   bool                 mInReportMoveEvent; // true if in a call to ReportMoveEvent().
   bool                 mInResize; // true if in a call to DoResize().
 
+  bool                 mAlwaysOnTop;
+
   int32_t              mNumModalDescendents;
   InputContext         mInputContext;
 };
diff --git a/widget/cocoa/nsCocoaWindow.mm b/widget/cocoa/nsCocoaWindow.mm
index b6d94ea94..b141e80b0 100644
--- a/widget/cocoa/nsCocoaWindow.mm
+++ b/widget/cocoa/nsCocoaWindow.mm
@@ -35,6 +35,7 @@
 #include "nsIWidgetListener.h"
 #include "nsIPresShell.h"
 #include "nsScreenCocoa.h"
+#include "VibrancyManager.h"
 
 #include "gfxPlatform.h"
 #include "qcms.h"
@@ -128,6 +129,7 @@ nsCocoaWindow::nsCocoaWindow()
 , mIsAnimationSuppressed(false)
 , mInReportMoveEvent(false)
 , mInResize(false)
+, mAlwaysOnTop(false)
 , mNumModalDescendents(0)
 {
   if ([NSWindow respondsToSelector:@selector(setAllowsAutomaticWindowTabbing:)]) {
@@ -302,12 +304,14 @@ nsCocoaWindow::Create(nsIWidget* aParent,
   if (mWindowType == eWindowType_popup) {
     if (aInitData->mMouseTransparent) {
       [mWindow setIgnoresMouseEvents:YES];
+    } else {
+      [mWindow setIgnoresMouseEvents:NO];
     }
     // now we can convert newBounds to device pixels for the window we created,
     // as the child view expects a rect expressed in the dev pix of its parent
     LayoutDeviceIntRect devRect =
       RoundedToInt(newBounds * GetDesktopToDeviceScale());
-    return CreatePopupContentView(devRect);
+    return CreatePopupContentView(devRect, aInitData);
   }
 
   mIsAnimationSuppressed = aInitData->mIsAnimationSuppressed;
@@ -456,6 +460,11 @@ nsresult nsCocoaWindow::CreateNativeWindow(const NSRect &aRect,
   mWindow = [[windowClass alloc] initWithContentRect:contentRect styleMask:features 
                                  backing:NSBackingStoreBuffered defer:YES];
 
+  // Make sure that window titles don't leak to disk in private browsing mode
+  // due to macOS' resume feature.
+  [mWindow setRestorable:NO];
+  [mWindow disableSnapshotRestoration];
+
   // setup our notification delegate. Note that setDelegate: does NOT retain.
   mDelegate = [[WindowDelegate alloc] initWithGeckoWindow:this];
   [mWindow setDelegate:mDelegate];
@@ -474,7 +483,6 @@ nsresult nsCocoaWindow::CreateNativeWindow(const NSRect &aRect,
 
   if (mWindowType == eWindowType_popup) {
     SetPopupWindowLevel();
-    [mWindow setHasShadow:YES];
     [mWindow setBackgroundColor:[NSColor clearColor]];
     [mWindow setOpaque:NO];
   } else {
@@ -483,6 +491,13 @@ nsresult nsCocoaWindow::CreateNativeWindow(const NSRect &aRect,
     [mWindow setOpaque:YES];
   }
 
+  NSWindowCollectionBehavior newBehavior = [mWindow collectionBehavior];
+  if (mAlwaysOnTop) {
+    [mWindow setLevel:NSFloatingWindowLevel];
+    newBehavior |= NSWindowCollectionBehaviorCanJoinAllSpaces;
+  }
+  [mWindow setCollectionBehavior:newBehavior];
+
   [mWindow setContentMinSize:NSMakeSize(60, 60)];
   [mWindow disableCursorRects];
 
@@ -499,7 +514,8 @@ nsresult nsCocoaWindow::CreateNativeWindow(const NSRect &aRect,
 }
 
 NS_IMETHODIMP
-nsCocoaWindow::CreatePopupContentView(const LayoutDeviceIntRect &aRect)
+nsCocoaWindow::CreatePopupContentView(const LayoutDeviceIntRect &aRect,
+	                                  nsWidgetInitData* aInitData)
 {
   NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
 
@@ -512,13 +528,16 @@ nsCocoaWindow::CreatePopupContentView(const LayoutDeviceIntRect &aRect)
 
   nsIWidget* thisAsWidget = static_cast<nsIWidget*>(this);
   nsresult rv = mPopupContentView->Create(thisAsWidget, nullptr, aRect,
-                                          nullptr);
+                                          aInitData);
   if (NS_WARN_IF(NS_FAILED(rv))) {
     return rv;
   }
 
-  ChildView* newContentView = (ChildView*)mPopupContentView->GetNativeData(NS_NATIVE_WIDGET);
-  [mWindow setContentView:newContentView];
+  NSView* contentView = [mWindow contentView];
+  ChildView* childView = (ChildView*)mPopupContentView->GetNativeData(NS_NATIVE_WIDGET);
+  [childView setFrame:NSZeroRect];
+  [childView setAutoresizingMask:NSViewWidthSizable | NSViewHeightSizable];
+  [contentView addSubview:childView];
 
   return NS_OK;
 
@@ -757,6 +776,13 @@ NS_IMETHODIMP nsCocoaWindow::Show(bool bState)
     (NSWindow*)parentWidget->GetNativeData(NS_NATIVE_WINDOW) : nil;
 
   if (bState && !mBounds.IsEmpty()) {
+    // Don't try to show a popup when the parent isn't visible or is minimized.
+    if (mWindowType == eWindowType_popup && nativeParentWindow) {
+      if (![nativeParentWindow isVisible] || [nativeParentWindow isMiniaturized]) {
+        return NS_ERROR_FAILURE;
+      }
+    }
+
     if (mPopupContentView) {
       // Ensure our content view is visible. We never need to hide it.
       mPopupContentView->Show(true);
@@ -2790,12 +2816,6 @@ static NSMutableSet *gSwizzledFrameViewClasses = nil;
  - (void)_addKnownSubview:(NSView*)aView positioned:(NSWindowOrderingMode)place relativeTo:(NSView*)otherView;
 @end
 
-// Available on 10.10
-@interface NSWindow(PrivateCornerMaskMethod)
- - (id)_cornerMask;
- - (void)_cornerMaskChanged;
-@end
-
 #if !defined(MAC_OS_X_VERSION_10_10) || \
     MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_10
 
@@ -2816,6 +2836,10 @@ static NSMutableSet *gSwizzledFrameViewClasses = nil;
 
 #endif
 
+@interface NSView(NSVisualEffectViewSetMaskImage)
+- (void)setMaskImage:(NSImage*)image;
+@end
+
 @interface BaseWindow(Private)
 - (void)removeTrackingArea;
 - (void)cursorUpdated:(NSEvent*)aEvent;
@@ -2825,25 +2849,6 @@ static NSMutableSet *gSwizzledFrameViewClasses = nil;
 
 @implementation BaseWindow
 
-- (id)_cornerMask
-{
-  if (!mUseMenuStyle) {
-    return [super _cornerMask];
-  }
-
-  CGFloat radius = 4.0f;
-  NSEdgeInsets insets = { 5, 5, 5, 5 };
-  NSSize maskSize = { 12, 12 };
-  NSImage* maskImage = [NSImage imageWithSize:maskSize flipped:YES drawingHandler:^BOOL(NSRect dstRect) {
-    NSBezierPath *path = [NSBezierPath bezierPathWithRoundedRect:dstRect xRadius:radius yRadius:radius];
-    [[NSColor colorWithDeviceWhite:1.0 alpha:1.0] set];
-    [path fill];
-    return YES;
-  }];
-  [maskImage setCapInsets:insets];
-  return maskImage;
-}
-
 // The frame of a window is implemented using undocumented NSView subclasses.
 // We offset the window buttons by overriding the methods _closeButtonOrigin
 // and _fullScreenButtonOrigin on these frame view classes. The class which is
@@ -2916,14 +2921,54 @@ static NSMutableSet *gSwizzledFrameViewClasses = nil;
   return self;
 }
 
+// Returns an autoreleased NSImage.
+static NSImage*
+GetMenuMaskImage()
+{
+  CGFloat radius = 4.0f;
+  NSEdgeInsets insets = { 5, 5, 5, 5 };
+  NSSize maskSize = { 12, 12 };
+  NSImage* maskImage = [NSImage imageWithSize:maskSize flipped:YES drawingHandler:^BOOL(NSRect dstRect) {
+    NSBezierPath *path = [NSBezierPath bezierPathWithRoundedRect:dstRect xRadius:radius yRadius:radius];
+    [[NSColor colorWithDeviceWhite:1.0 alpha:1.0] set];
+    [path fill];
+    return YES;
+  }];
+  [maskImage setCapInsets:insets];
+  return maskImage;
+}
+
+- (void)swapOutChildViewWrapper:(NSView*)aNewWrapper
+{
+  [aNewWrapper setFrame:[[self contentView] frame]];
+  NSView* childView = [[self mainChildView] retain];
+  [childView removeFromSuperview];
+  [aNewWrapper addSubview:childView];
+  [childView release];
+  [super setContentView:aNewWrapper];
+}
+
 - (void)setUseMenuStyle:(BOOL)aValue
 {
-  if (aValue != mUseMenuStyle) {
-    mUseMenuStyle = aValue;
-    if ([self respondsToSelector:@selector(_cornerMaskChanged)]) {
-      [self _cornerMaskChanged];
+  if (!VibrancyManager::SystemSupportsVibrancy()) {
+    return;
+  }
+
+  if (aValue && !mUseMenuStyle) {
+    // Turn on rounded corner masking.
+    NSView* effectView = VibrancyManager::CreateEffectView(VibrancyType::MENU, YES);
+    if ([effectView respondsToSelector:@selector(setMaskImage:)]) {
+      [effectView setMaskImage:GetMenuMaskImage()];
     }
+    [self swapOutChildViewWrapper:effectView];
+    [effectView release];
+  } else if (mUseMenuStyle && !aValue) {
+    // Turn off rounded corner masking.
+    NSView* wrapper = [[NSView alloc] initWithFrame:NSZeroRect];
+    [self swapOutChildViewWrapper:wrapper];
+    [wrapper release];
   }
+  mUseMenuStyle = aValue;
 }
 
 - (void)setBeingShown:(BOOL)aValue
@@ -3081,10 +3126,6 @@ static const NSString* kStateCollectionBehavior = @"collectionBehavior";
 - (ChildView*)mainChildView
 {
   NSView *contentView = [self contentView];
-  // A PopupWindow's contentView is a ChildView object.
-  if ([contentView isKindOfClass:[ChildView class]]) {
-    return (ChildView*)contentView;
-  }
   NSView* lastView = [[contentView subviews] lastObject];
   if ([lastView isKindOfClass:[ChildView class]]) {
     return (ChildView*)lastView;
diff --git a/widget/cocoa/nsNativeThemeCocoa.mm b/widget/cocoa/nsNativeThemeCocoa.mm
index fc4f7f2e9..f93e40f7b 100644
--- a/widget/cocoa/nsNativeThemeCocoa.mm
+++ b/widget/cocoa/nsNativeThemeCocoa.mm
@@ -443,8 +443,8 @@ static ChildView* ChildViewForFrame(nsIFrame* aFrame)
   if (!widget)
     return nil;
 
-  NSView* view = (NSView*)widget->GetNativeData(NS_NATIVE_WIDGET);
-  return [view isKindOfClass:[ChildView class]] ? (ChildView*)view : nil;
+  NSWindow* window = (NSWindow*)widget->GetNativeData(NS_NATIVE_WINDOW);
+  return [window isKindOfClass:[BaseWindow class]] ? [(BaseWindow*)window mainChildView]  : nil;
 }
 
 static NSWindow* NativeWindowForFrame(nsIFrame* aFrame,
@@ -2437,17 +2437,30 @@ nsNativeThemeCocoa::DrawWidgetBackground(nsRenderingContext* aContext,
       break;
 
     case NS_THEME_MENUSEPARATOR: {
-      ThemeMenuState menuState;
-      if (IsDisabled(aFrame, eventState)) {
-        menuState = kThemeMenuDisabled;
+      // Workaround for visual artifacts issues with
+      // HIThemeDrawMenuSeparator on macOS Big Sur.
+      if (nsCocoaFeatures::OnBigSurOrLater()) {
+        CGRect separatorRect = macRect;
+        separatorRect.size.height = 1;
+        separatorRect.size.width -= 42;
+        separatorRect.origin.x += 21;
+        // Use a gray color similar to the native separator
+        CGContextSetRGBFillColor(cgContext, 0.816, 0.816, 0.816, 1.0);
+        CGContextFillRect(cgContext, separatorRect);
       }
-      else {
-        menuState = CheckBooleanAttr(aFrame, nsGkAtoms::menuactive) ?
-                    kThemeMenuSelected : kThemeMenuActive;
+      else
+      {
+        ThemeMenuState menuState;
+        if (IsDisabled(aFrame, eventState)) {
+           menuState = kThemeMenuDisabled;
+        }
+        else {
+          menuState = CheckBooleanAttr(aFrame, nsGkAtoms::menuactive) ?
+                      kThemeMenuSelected : kThemeMenuActive;
+        }
+        HIThemeMenuItemDrawInfo midi = { 0, kThemeMenuItemPlain, menuState };
+        HIThemeDrawMenuSeparator(&macRect, &macRect, &midi, cgContext, HITHEME_ORIENTATION);
       }
-
-      HIThemeMenuItemDrawInfo midi = { 0, kThemeMenuItemPlain, menuState };
-      HIThemeDrawMenuSeparator(&macRect, &macRect, &midi, cgContext, HITHEME_ORIENTATION);
     }
       break;
 
diff --git a/xpcom/glue/nsTArray-inl.h b/xpcom/glue/nsTArray-inl.h
index 7e667a327..6fdfdcb7c 100644
--- a/xpcom/glue/nsTArray-inl.h
+++ b/xpcom/glue/nsTArray-inl.h
@@ -249,12 +249,28 @@ nsTArray_base<Alloc, Copy>::ShrinkCapacity(size_type aElemSize,
     return;
   }
 
-  size_type size = sizeof(Header) + length * aElemSize;
-  void* ptr = nsTArrayFallibleAllocator::Realloc(mHdr, size);
-  if (!ptr) {
-    return;
+  size_type newSize = sizeof(Header) + length * aElemSize;
+
+  Header* newHeader;
+  if (!Copy::allowRealloc) {
+    // Malloc() and copy
+    newHeader = static_cast<Header*>(nsTArrayFallibleAllocator::Malloc(newSize));
+    if (!newHeader) {
+      return;
+    }
+
+    Copy::MoveNonOverlappingRegionWithHeader(newHeader, mHdr, Length(), aElemSize);
+
+    nsTArrayFallibleAllocator::Free(mHdr);
+  } else {
+    // Realloc() existing data
+    newHeader = static_cast<Header*>(nsTArrayFallibleAllocator::Realloc(mHdr, newSize));
+    if (!newHeader) {
+      return;
+    }
   }
-  mHdr = static_cast<Header*>(ptr);
+  
+  mHdr = newHeader;
   mHdr->mCapacity = length;
 }
 
diff --git a/xpcom/io/SpecialSystemDirectory.cpp b/xpcom/io/SpecialSystemDirectory.cpp
index c174b4ac7..1c020c426 100644
--- a/xpcom/io/SpecialSystemDirectory.cpp
+++ b/xpcom/io/SpecialSystemDirectory.cpp
@@ -76,9 +76,9 @@ GetWindowsFolder(int aFolder, nsIFile** aFile)
 {
   WCHAR path_orig[MAX_PATH + 3];
   WCHAR* path = path_orig + 1;
-  HRESULT result = SHGetSpecialFolderPathW(nullptr, path, aFolder, true);
+  BOOL result = SHGetSpecialFolderPathW(nullptr, path, aFolder, true);
 
-  if (!SUCCEEDED(result)) {
+  if (!result) {
     return NS_ERROR_FAILURE;
   }