diff --git a/lib/browser/guest-window-manager.js b/lib/browser/guest-window-manager.js
index 3d920ab54e..aee98fc41f 100644
--- a/lib/browser/guest-window-manager.js
+++ b/lib/browser/guest-window-manager.js
@@ -240,3 +240,18 @@ ipcMain.on('ELECTRON_GUEST_WINDOW_MANAGER_WEB_CONTENTS_METHOD', function (event,
     console.error(`Blocked ${event.sender.getURL()} from calling ${method} on its opener.`)
   }
 })
+
+ipcMain.on('ELECTRON_GUEST_WINDOW_MANAGER_WEB_CONTENTS_METHOD_SYNC', function (event, guestId, method, ...args) {
+  const guestContents = webContents.fromId(guestId)
+  if (guestContents == null) {
+    event.returnValue = null
+    return
+  }
+
+  if (canAccessWindow(event.sender, guestContents)) {
+    event.returnValue = guestContents[method].apply(guestContents, args)
+  } else {
+    console.error(`Blocked ${event.sender.getURL()} from calling ${method} on its opener.`)
+    event.returnValue = null
+  }
+})
diff --git a/lib/renderer/override.js b/lib/renderer/override.js
index 6b5e0e1615..69ef3a5e6f 100644
--- a/lib/renderer/override.js
+++ b/lib/renderer/override.js
@@ -22,7 +22,7 @@ var BrowserWindowProxy = (function () {
   }
 
   BrowserWindowProxy.remove = function (guestId) {
-    return delete this.proxies[guestId]
+    delete this.proxies[guestId]
   }
 
   function BrowserWindowProxy (guestId1) {
@@ -41,28 +41,28 @@ var BrowserWindowProxy = (function () {
   }
 
   BrowserWindowProxy.prototype.close = function () {
-    return ipcRenderer.send('ELECTRON_GUEST_WINDOW_MANAGER_WINDOW_CLOSE', this.guestId)
+    ipcRenderer.send('ELECTRON_GUEST_WINDOW_MANAGER_WINDOW_CLOSE', this.guestId)
   }
 
   BrowserWindowProxy.prototype.focus = function () {
-    return ipcRenderer.send('ELECTRON_GUEST_WINDOW_MANAGER_WINDOW_METHOD', this.guestId, 'focus')
+    ipcRenderer.send('ELECTRON_GUEST_WINDOW_MANAGER_WINDOW_METHOD', this.guestId, 'focus')
   }
 
   BrowserWindowProxy.prototype.blur = function () {
-    return ipcRenderer.send('ELECTRON_GUEST_WINDOW_MANAGER_WINDOW_METHOD', this.guestId, 'blur')
+    ipcRenderer.send('ELECTRON_GUEST_WINDOW_MANAGER_WINDOW_METHOD', this.guestId, 'blur')
   }
 
   BrowserWindowProxy.prototype.print = function () {
-    return ipcRenderer.send('ELECTRON_GUEST_WINDOW_MANAGER_WEB_CONTENTS_METHOD', this.guestId, 'print')
+    ipcRenderer.send('ELECTRON_GUEST_WINDOW_MANAGER_WEB_CONTENTS_METHOD', this.guestId, 'print')
   }
 
   Object.defineProperty(BrowserWindowProxy.prototype, 'location', {
     get: function () {
-      return ipcRenderer.sendSync('ELECTRON_GUEST_WINDOW_MANAGER_WINDOW_METHOD', this.guestId, 'getURL')
+      return ipcRenderer.sendSync('ELECTRON_GUEST_WINDOW_MANAGER_WEB_CONTENTS_METHOD_SYNC', this.guestId, 'getURL')
     },
     set: function (url) {
       url = resolveURL(url)
-      return ipcRenderer.sendSync('ELECTRON_GUEST_WINDOW_MANAGER_WINDOW_METHOD', this.guestId, 'loadURL', url)
+      return ipcRenderer.sendSync('ELECTRON_GUEST_WINDOW_MANAGER_WEB_CONTENTS_METHOD_SYNC', this.guestId, 'loadURL', url)
     }
   })
 
@@ -70,11 +70,11 @@ var BrowserWindowProxy = (function () {
     if (targetOrigin == null) {
       targetOrigin = '*'
     }
-    return ipcRenderer.send('ELECTRON_GUEST_WINDOW_MANAGER_WINDOW_POSTMESSAGE', this.guestId, message, targetOrigin, window.location.origin)
+    ipcRenderer.send('ELECTRON_GUEST_WINDOW_MANAGER_WINDOW_POSTMESSAGE', this.guestId, message, targetOrigin, window.location.origin)
   }
 
   BrowserWindowProxy.prototype['eval'] = function (...args) {
-    return ipcRenderer.send.apply(ipcRenderer, ['ELECTRON_GUEST_WINDOW_MANAGER_WEB_CONTENTS_METHOD', this.guestId, 'executeJavaScript'].concat(args))
+    ipcRenderer.send.apply(ipcRenderer, ['ELECTRON_GUEST_WINDOW_MANAGER_WEB_CONTENTS_METHOD', this.guestId, 'executeJavaScript'].concat(args))
   }
 
   return BrowserWindowProxy
@@ -207,7 +207,7 @@ ipcRenderer.on('ELECTRON_GUEST_WINDOW_POSTMESSAGE', function (event, sourceId, m
 
 // Forward history operations to browser.
 var sendHistoryOperation = function (...args) {
-  return ipcRenderer.send.apply(ipcRenderer, ['ELECTRON_NAVIGATION_CONTROLLER'].concat(args))
+  ipcRenderer.send.apply(ipcRenderer, ['ELECTRON_NAVIGATION_CONTROLLER'].concat(args))
 }
 
 var getHistoryOperation = function (...args) {
@@ -215,15 +215,15 @@ var getHistoryOperation = function (...args) {
 }
 
 window.history.back = function () {
-  return sendHistoryOperation('goBack')
+  sendHistoryOperation('goBack')
 }
 
 window.history.forward = function () {
-  return sendHistoryOperation('goForward')
+  sendHistoryOperation('goForward')
 }
 
 window.history.go = function (offset) {
-  return sendHistoryOperation('goToOffset', offset)
+  sendHistoryOperation('goToOffset', offset)
 }
 
 Object.defineProperty(window.history, 'length', {
diff --git a/spec/chromium-spec.js b/spec/chromium-spec.js
index 7d58bee374..1a39edd296 100644
--- a/spec/chromium-spec.js
+++ b/spec/chromium-spec.js
@@ -345,6 +345,15 @@ describe('chromium feature', function () {
       w = window.open(url, '', 'show=no')
     })
 
+    it('works when origin matches', function (done) {
+      listener = function (event) {
+        assert.equal(event.data, location.href)
+        done()
+      }
+      window.addEventListener('message', listener)
+      w = window.open(`file://${fixtures}/pages/window-opener-location.html`, '', 'show=no')
+    })
+
     it('works when origin does not match opener but has node integration', function (done) {
       listener = function (event) {
         assert.equal(event.data, location.href)
@@ -397,11 +406,29 @@ describe('chromium feature', function () {
       document.body.appendChild(webview)
     })
 
+    it('works when origin matches', function (done) {
+      webview = new WebView()
+      webview.addEventListener('console-message', function (e) {
+        assert.equal(e.message, webview.src)
+        done()
+      })
+      webview.setAttribute('allowpopups', 'on')
+      webview.src = url.format({
+        pathname: srcPath,
+        protocol: 'file',
+        query: {
+          p: pageURL
+        },
+        slashes: true
+      })
+      document.body.appendChild(webview)
+    })
+
     it('works when origin does not match opener but has node integration', function (done) {
       webview = new WebView()
       webview.addEventListener('console-message', function (e) {
         webview.remove()
-        assert.equal(e.message, location.href)
+        assert.equal(e.message, webview.src)
         done()
       })
       webview.setAttribute('allowpopups', 'on')