diff --git a/CHROMIUM_BUILD_COMPATIBILITY.txt b/CHROMIUM_BUILD_COMPATIBILITY.txt
index bb5b0bb72..02bb7fe43 100644
--- a/CHROMIUM_BUILD_COMPATIBILITY.txt
+++ b/CHROMIUM_BUILD_COMPATIBILITY.txt
@@ -7,5 +7,5 @@
 # https://bitbucket.org/chromiumembedded/cef/wiki/BranchesAndBuilding
 
 {
-  'chromium_checkout': 'refs/tags/53.0.2785.46',
+  'chromium_checkout': 'refs/tags/53.0.2785.70',
 }
diff --git a/libcef/browser/devtools_frontend.cc b/libcef/browser/devtools_frontend.cc
index 542a1d9c7..490091626 100644
--- a/libcef/browser/devtools_frontend.cc
+++ b/libcef/browser/devtools_frontend.cc
@@ -320,6 +320,21 @@ void CefDevToolsFrontend::DispatchProtocolMessage(
   }
 }
 
+void CefDevToolsFrontend::SetPreferences(const std::string& json) {
+  preferences_.Clear();
+  if (json.empty())
+    return;
+  base::DictionaryValue* dict = nullptr;
+  std::unique_ptr<base::Value> parsed = base::JSONReader::Read(json);
+  if (!parsed || !parsed->GetAsDictionary(&dict))
+    return;
+  for (base::DictionaryValue::Iterator it(*dict); !it.IsAtEnd(); it.Advance()) {
+    if (!it.value().IsType(base::Value::TYPE_STRING))
+      continue;
+    preferences_.SetWithoutPathExpansion(it.key(), it.value().CreateDeepCopy());
+  }
+}
+
 void CefDevToolsFrontend::OnURLFetchComplete(const net::URLFetcher* source) {
   // TODO(pfeldman): this is a copy of chrome's devtools_ui_bindings.cc.
   // We should handle some of the commands including this one in content.
diff --git a/libcef/browser/devtools_frontend.h b/libcef/browser/devtools_frontend.h
index b0e4e697b..a1f8720b3 100644
--- a/libcef/browser/devtools_frontend.h
+++ b/libcef/browser/devtools_frontend.h
@@ -62,7 +62,7 @@ class CefDevToolsFrontend : public content::WebContentsObserver,
                        bool replaced) override;
   void DispatchProtocolMessage(content::DevToolsAgentHost* agent_host,
                                const std::string& message) override;
-  base::DictionaryValue* preferences() { return &preferences_; }
+  void SetPreferences(const std::string& json);
 
   // WebContentsObserver overrides
   void RenderViewCreated(content::RenderViewHost* render_view_host) override;
diff --git a/patch/patches/browser_web_contents_1257.patch b/patch/patches/browser_web_contents_1257.patch
index e7e1a40a5..3ef0960ce 100644
--- a/patch/patches/browser_web_contents_1257.patch
+++ b/patch/patches/browser_web_contents_1257.patch
@@ -1,8 +1,8 @@
 diff --git web_contents_impl.cc web_contents_impl.cc
-index ed42816..4513f67 100644
+index b9ee451..0a0e8e4 100644
 --- web_contents_impl.cc
 +++ web_contents_impl.cc
-@@ -1502,6 +1502,12 @@ void WebContentsImpl::Init(const WebContents::CreateParams& params) {
+@@ -1503,6 +1503,12 @@ void WebContentsImpl::Init(const WebContents::CreateParams& params) {
    std::string unique_name = params.main_frame_name;
    frame_tree_.root()->SetFrameName(params.main_frame_name, unique_name);
  
@@ -15,7 +15,7 @@ index ed42816..4513f67 100644
    WebContentsViewDelegate* delegate =
        GetContentClient()->browser()->GetWebContentsViewDelegate(this);
  
-@@ -1534,6 +1540,7 @@ void WebContentsImpl::Init(const WebContents::CreateParams& params) {
+@@ -1535,6 +1541,7 @@ void WebContentsImpl::Init(const WebContents::CreateParams& params) {
                                           std::move(view_),
                                           &render_view_host_delegate_view_));
    }
@@ -23,7 +23,7 @@ index ed42816..4513f67 100644
    CHECK(render_view_host_delegate_view_);
    CHECK(view_.get());
  
-@@ -1991,11 +1998,14 @@ void WebContentsImpl::CreateNewWindow(
+@@ -1992,11 +1999,14 @@ void WebContentsImpl::CreateNewWindow(
        static_cast<SessionStorageNamespaceImpl*>(session_storage_namespace);
    CHECK(session_storage_namespace_impl->IsFromContext(dom_storage_context));
  
@@ -39,7 +39,7 @@ index ed42816..4513f67 100644
      if (route_id != MSG_ROUTING_NONE &&
          !RenderViewHost::FromID(render_process_id, route_id)) {
        // If the embedder didn't create a WebContents for this route, we need to
-@@ -2019,6 +2029,8 @@ void WebContentsImpl::CreateNewWindow(
+@@ -2020,6 +2030,8 @@ void WebContentsImpl::CreateNewWindow(
    create_params.opener_render_process_id = render_process_id;
    create_params.opener_render_frame_id = params.opener_render_frame_id;
    create_params.opener_suppressed = params.opener_suppressed;
diff --git a/patch/patches/views_widget_180_1481_1677_1749.patch b/patch/patches/views_widget_180_1481_1677_1749.patch
index 68397c59b..333334675 100644
--- a/patch/patches/views_widget_180_1481_1677_1749.patch
+++ b/patch/patches/views_widget_180_1481_1677_1749.patch
@@ -146,7 +146,7 @@ index de96b63..ed0ba73 100644
  
  bool DesktopWindowTreeHostWin::HandleMouseEvent(const ui::MouseEvent& event) {
 diff --git ui/views/widget/desktop_aura/desktop_window_tree_host_win.h ui/views/widget/desktop_aura/desktop_window_tree_host_win.h
-index e71604d..937bf91 100644
+index e71604d..937bf913 100644
 --- ui/views/widget/desktop_aura/desktop_window_tree_host_win.h
 +++ ui/views/widget/desktop_aura/desktop_window_tree_host_win.h
 @@ -137,6 +137,7 @@ class VIEWS_EXPORT DesktopWindowTreeHostWin