diff --git a/atom/browser/api/atom_api_web_contents.cc b/atom/browser/api/atom_api_web_contents.cc
index bcf42553e98..ffca4a077ba 100644
--- a/atom/browser/api/atom_api_web_contents.cc
+++ b/atom/browser/api/atom_api_web_contents.cc
@@ -11,6 +11,7 @@
 #include "atom/common/native_mate_converters/string16_converter.h"
 #include "atom/common/native_mate_converters/value_converter.h"
 #include "base/strings/utf_string_conversions.h"
+#include "brightray/browser/inspectable_web_contents.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
@@ -55,9 +56,9 @@ WebContents::WebContents(const mate::Dictionary& options)
   if (options.Get("isGuest", &is_guest) && is_guest)
     params.guest_delegate = this;
 
-  storage_.reset(content::WebContents::Create(params));
-  storage_->SetDelegate(this);
-  Observe(storage_.get());
+  storage_.reset(brightray::InspectableWebContents::Create(params));
+  Observe(storage_->GetWebContents());
+  web_contents()->SetDelegate(this);
 }
 
 WebContents::~WebContents() {
@@ -368,6 +369,19 @@ void WebContents::ExecuteJavaScript(const base::string16& code) {
   web_contents()->GetMainFrame()->ExecuteJavaScript(code);
 }
 
+void WebContents::OpenDevTools() {
+  storage_->SetCanDock(false);
+  storage_->ShowDevTools();
+}
+
+void WebContents::CloseDevTools() {
+  storage_->CloseDevTools();
+}
+
+bool WebContents::IsDevToolsOpened() {
+  return storage_->IsDevToolsViewShowing();
+}
+
 bool WebContents::SendIPCMessage(const base::string16& channel,
                                  const base::ListValue& args) {
   return Send(new AtomViewMsg_Message(routing_id(), channel, args));
@@ -442,6 +456,9 @@ mate::ObjectTemplateBuilder WebContents::GetObjectTemplateBuilder(
         .SetMethod("setAutoSize", &WebContents::SetAutoSize)
         .SetMethod("setAllowTransparency", &WebContents::SetAllowTransparency)
         .SetMethod("isGuest", &WebContents::is_guest)
+        .SetMethod("openDevTools", &WebContents::OpenDevTools)
+        .SetMethod("closeDevTools", &WebContents::CloseDevTools)
+        .SetMethod("isDevToolsOpened", &WebContents::IsDevToolsOpened)
         .Build());
 
   return mate::ObjectTemplateBuilder(
diff --git a/atom/browser/api/atom_api_web_contents.h b/atom/browser/api/atom_api_web_contents.h
index 679f0c091df..c29221008c8 100644
--- a/atom/browser/api/atom_api_web_contents.h
+++ b/atom/browser/api/atom_api_web_contents.h
@@ -8,11 +8,16 @@
 #include <string>
 
 #include "atom/browser/api/event_emitter.h"
+#include "brightray/browser/default_web_contents_delegate.h"
 #include "content/public/browser/browser_plugin_guest_delegate.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "native_mate/handle.h"
 
+namespace brightray {
+class InspectableWebContents;
+}
+
 namespace mate {
 class Dictionary;
 }
@@ -57,6 +62,9 @@ class WebContents : public mate::EventEmitter,
   void SetUserAgent(const std::string& user_agent);
   void InsertCSS(const std::string& css);
   void ExecuteJavaScript(const base::string16& code);
+  void OpenDevTools();
+  void CloseDevTools();
+  bool IsDevToolsOpened();
   bool SendIPCMessage(const base::string16& channel,
                       const base::ListValue& args);
 
@@ -175,7 +183,7 @@ class WebContents : public mate::EventEmitter,
   scoped_ptr<base::DictionaryValue> extra_params_;
 
   // Stores the WebContents that managed by this class.
-  scoped_ptr<content::WebContents> storage_;
+  scoped_ptr<brightray::InspectableWebContents> storage_;
 
   // The WebContents that attaches this guest view.
   content::WebContents* embedder_web_contents_;
diff --git a/atom/common/lib/init.coffee b/atom/common/lib/init.coffee
index e3896af8a88..b8d67355c05 100644
--- a/atom/common/lib/init.coffee
+++ b/atom/common/lib/init.coffee
@@ -1,6 +1,7 @@
-path   = require 'path'
-timers = require 'timers'
-Module = require 'module'
+process = global.process
+path    = require 'path'
+timers  = require 'timers'
+Module  = require 'module'
 
 process.atomBinding = (name) ->
   try
diff --git a/atom/renderer/lib/init.coffee b/atom/renderer/lib/init.coffee
index 69bb0ac7c4d..011720e68b3 100644
--- a/atom/renderer/lib/init.coffee
+++ b/atom/renderer/lib/init.coffee
@@ -1,6 +1,7 @@
-path   = require 'path'
-url    = require 'url'
-Module = require 'module'
+process = global.process
+path    = require 'path'
+url     = require 'url'
+Module  = require 'module'
 
 # Expose information of current process.
 process.type = 'renderer'
@@ -83,3 +84,5 @@ else
   # global reference after they are done.
   process.once 'BIND_DONE', ->
     delete global.process
+    delete global.setImmediate
+    delete global.clearImmediate
diff --git a/atom/renderer/lib/web-view.coffee b/atom/renderer/lib/web-view.coffee
index 8061f9b049c..781a712a11e 100644
--- a/atom/renderer/lib/web-view.coffee
+++ b/atom/renderer/lib/web-view.coffee
@@ -517,7 +517,10 @@ registerWebViewElement = ->
     "isCrashed"
     "setUserAgent"
     "executeJavaScript"
-    "insertCSS"
+    "insertCSS",
+    "openDevTools",
+    "closeDevTools",
+    "isDevToolsOpened",
     "send"
   ]
 
diff --git a/docs/api/web-view-tag.md b/docs/api/web-view-tag.md
index 10bc067df4b..7b801d9bd69 100644
--- a/docs/api/web-view-tag.md
+++ b/docs/api/web-view-tag.md
@@ -167,7 +167,19 @@ Injects CSS into guest page.
 
 * `code` String
 
-Evaluate `code` in guest page.
+Evaluates `code` in guest page.
+
+### `<webview>`.openDevTools()
+
+Opens a devtools window for guest page.
+
+### `<webview>`.closeDevTools()
+
+Closes the devtools window of guest page.
+
+### `<webview>`.isDevToolsOpened()
+
+Returns whether guest page has a devtools window attached.
 
 ### `<webview>`.send(channel[, args...])
 
diff --git a/vendor/brightray b/vendor/brightray
index b90f13be24a..52b2a6bfac3 160000
--- a/vendor/brightray
+++ b/vendor/brightray
@@ -1 +1 @@
-Subproject commit b90f13be24a006c55b7e1c935be492101ac2736c
+Subproject commit 52b2a6bfac3e5e1527c0dcfba6f5a5d2aa6ad9dd