diff --git a/atom/browser/api/atom_api_web_contents.cc b/atom/browser/api/atom_api_web_contents.cc
index d2ff197929a5..cd21f5a79a6a 100644
--- a/atom/browser/api/atom_api_web_contents.cc
+++ b/atom/browser/api/atom_api_web_contents.cc
@@ -56,6 +56,7 @@
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/common/view_messages.h"
+#include "content/public/browser/child_process_security_policy.h"
 #include "content/public/browser/favicon_status.h"
 #include "content/public/browser/native_web_keyboard_event.h"
 #include "content/public/browser/navigation_details.h"
@@ -1253,7 +1254,7 @@ void WebContents::HasServiceWorker(
       delete this;
     }
   };
-  
+
   auto wrapped_callback = new WrappedCallback(callback);
 
   context->CheckHasServiceWorker(
@@ -1789,6 +1790,12 @@ v8::Local<v8::Value> WebContents::Debugger(v8::Isolate* isolate) {
   return v8::Local<v8::Value>::New(isolate, debugger_);
 }
 
+void WebContents::GrantOriginAccess(const GURL& url) {
+  content::ChildProcessSecurityPolicy::GetInstance()->GrantOrigin(
+      web_contents()->GetMainFrame()->GetProcess()->GetID(),
+      url::Origin(url));
+}
+
 // static
 void WebContents::BuildPrototype(v8::Isolate* isolate,
                                  v8::Local<v8::FunctionTemplate> prototype) {
@@ -1883,6 +1890,7 @@ void WebContents::BuildPrototype(v8::Isolate* isolate,
                  &WebContents::SetWebRTCIPHandlingPolicy)
       .SetMethod("getWebRTCIPHandlingPolicy",
                  &WebContents::GetWebRTCIPHandlingPolicy)
+      .SetMethod("_grantOriginAccess", &WebContents::GrantOriginAccess)
       .SetProperty("id", &WebContents::ID)
       .SetProperty("session", &WebContents::Session)
       .SetProperty("hostWebContents", &WebContents::HostWebContents)
diff --git a/atom/browser/api/atom_api_web_contents.h b/atom/browser/api/atom_api_web_contents.h
index c67c4e0d859c..b287cff3258d 100644
--- a/atom/browser/api/atom_api_web_contents.h
+++ b/atom/browser/api/atom_api_web_contents.h
@@ -216,6 +216,10 @@ class WebContents : public mate::TrackableObject<WebContents>,
   // Returns the owner window.
   v8::Local<v8::Value> GetOwnerBrowserWindow();
 
+  // Grants the child process the capability to access URLs with the origin of
+  // the specified URL.
+  void GrantOriginAccess(const GURL& url);
+
   // Properties.
   int32_t ID() const;
   v8::Local<v8::Value> Session(v8::Isolate* isolate);
diff --git a/lib/browser/chrome-extension.js b/lib/browser/chrome-extension.js
index b8f1089ff219..2e8254c19668 100644
--- a/lib/browser/chrome-extension.js
+++ b/lib/browser/chrome-extension.js
@@ -285,6 +285,9 @@ const loadDevToolsExtensions = function (win, manifests) {
   manifests.forEach(loadExtension)
 
   const extensionInfoArray = manifests.map(manifestToExtensionInfo)
+  extensionInfoArray.forEach((extension) => {
+    win.devToolsWebContents._grantOriginAccess(extension.startPage)
+  })
   win.devToolsWebContents.executeJavaScript(`DevToolsAPI.addExtensions(${JSON.stringify(extensionInfoArray)})`)
 }