diff --git a/filenames.gni b/filenames.gni
index 0b623b0b5d54..48cb82497256 100644
--- a/filenames.gni
+++ b/filenames.gni
@@ -34,11 +34,13 @@ filenames = {
     "lib/browser/api/view.js",
     "lib/browser/api/web-contents.js",
     "lib/browser/api/web-contents-view.js",
+    "lib/browser/chrome-devtools.js",
     "lib/browser/chrome-extension.js",
     "lib/browser/default-menu.js",
     "lib/browser/guest-view-manager.js",
     "lib/browser/guest-window-manager.js",
     "lib/browser/init.js",
+    "lib/browser/ipc-main-internal-utils.js",
     "lib/browser/ipc-main-internal.js",
     "lib/browser/navigation-controller.js",
     "lib/browser/objects-registry.js",
@@ -64,6 +66,7 @@ filenames = {
     "lib/renderer/content-scripts-injector.js",
     "lib/renderer/init.js",
     "lib/renderer/inspector.js",
+    "lib/renderer/ipc-renderer-internal-utils.js",
     "lib/renderer/ipc-renderer-internal.js",
     "lib/renderer/remote.js",
     "lib/renderer/security-warnings.js",
diff --git a/lib/browser/chrome-devtools.js b/lib/browser/chrome-devtools.js
new file mode 100644
index 000000000000..abcb1658446c
--- /dev/null
+++ b/lib/browser/chrome-devtools.js
@@ -0,0 +1,121 @@
+'use strict'
+
+const { dialog, Menu } = require('electron')
+const fs = require('fs')
+const url = require('url')
+
+const ipcMainUtils = require('@electron/internal/browser/ipc-main-internal-utils')
+
+const convertToMenuTemplate = function (event, items) {
+  return items.map(function (item) {
+    const transformed = item.type === 'subMenu' ? {
+      type: 'submenu',
+      label: item.label,
+      enabled: item.enabled,
+      submenu: convertToMenuTemplate(event, item.subItems)
+    } : item.type === 'separator' ? {
+      type: 'separator'
+    } : item.type === 'checkbox' ? {
+      type: 'checkbox',
+      label: item.label,
+      enabled: item.enabled,
+      checked: item.checked
+    } : {
+      type: 'normal',
+      label: item.label,
+      enabled: item.enabled
+    }
+
+    if (item.id != null) {
+      transformed.click = function () {
+        event._replyInternal('ELECTRON_INSPECTOR_CONTEXT_MENU_CLICK', item.id)
+      }
+    }
+
+    return transformed
+  })
+}
+
+const getEditMenuItems = function () {
+  return [
+    { role: 'undo' },
+    { role: 'redo' },
+    { type: 'separator' },
+    { role: 'cut' },
+    { role: 'copy' },
+    { role: 'paste' },
+    { role: 'pasteAndMatchStyle' },
+    { role: 'delete' },
+    { role: 'selectAll' }
+  ]
+}
+
+const isChromeDevTools = function (pageURL) {
+  const { protocol } = url.parse(pageURL)
+  return protocol === 'chrome-devtools:'
+}
+
+const assertChromeDevTools = function (contents, api) {
+  const pageURL = contents._getURL()
+  if (!isChromeDevTools(pageURL)) {
+    console.error(`Blocked ${pageURL} from calling ${api}`)
+    throw new Error(`Blocked ${api}`)
+  }
+}
+
+ipcMainUtils.handle('ELECTRON_INSPECTOR_CONTEXT_MENU', function (event, items, isEditMenu) {
+  assertChromeDevTools(event.sender, 'window.InspectorFrontendHost.showContextMenuAtPoint()')
+
+  const template = isEditMenu ? getEditMenuItems() : convertToMenuTemplate(event, items)
+  const menu = Menu.buildFromTemplate(template)
+  const window = event.sender.getOwnerBrowserWindow()
+
+  menu.once('menu-will-close', () => {
+    setTimeout(() => {
+      event._replyInternal('ELECTRON_INSPECTOR_CONTEXT_MENU_CLOSE')
+    })
+  })
+
+  menu.popup({ window })
+})
+
+ipcMainUtils.handle('ELECTRON_INSPECTOR_SELECT_FILE', function (event) {
+  return new Promise((resolve, reject) => {
+    assertChromeDevTools(event.sender, 'window.UI.createFileSelectorElement()')
+
+    dialog.showOpenDialog({}, function (files) {
+      if (files) {
+        const path = files[0]
+        fs.readFile(path, (error, data) => {
+          if (error) {
+            reject(error)
+          } else {
+            resolve([path, data])
+          }
+        })
+      } else {
+        resolve([])
+      }
+    })
+  })
+})
+
+ipcMainUtils.handleSync('ELECTRON_INSPECTOR_CONFIRM', function (event, message, title) {
+  return new Promise((resolve, reject) => {
+    assertChromeDevTools(event.sender, 'window.confirm()')
+
+    if (message == null) message = ''
+    if (title == null) title = ''
+
+    const options = {
+      message: `${message}`,
+      title: `${title}`,
+      buttons: ['OK', 'Cancel'],
+      cancelId: 1
+    }
+    const window = event.sender.getOwnerBrowserWindow()
+    dialog.showMessageBox(window, options, (response) => {
+      resolve(response === 0)
+    })
+  })
+})
diff --git a/lib/browser/init.js b/lib/browser/init.js
index c50c5f0d1eb8..7aa2346f625a 100644
--- a/lib/browser/init.js
+++ b/lib/browser/init.js
@@ -149,6 +149,9 @@ app.setPath('userData', path.join(app.getPath('appData'), app.getName()))
 app.setPath('userCache', path.join(app.getPath('cache'), app.getName()))
 app.setAppPath(packagePath)
 
+// Load the chrome devtools support.
+require('@electron/internal/browser/chrome-devtools')
+
 // Load the chrome extension support.
 require('@electron/internal/browser/chrome-extension')
 
diff --git a/lib/browser/ipc-main-internal-utils.js b/lib/browser/ipc-main-internal-utils.js
new file mode 100644
index 000000000000..25145d8d02ef
--- /dev/null
+++ b/lib/browser/ipc-main-internal-utils.js
@@ -0,0 +1,29 @@
+'use strict'
+
+const ipcMain = require('@electron/internal/browser/ipc-main-internal')
+const errorUtils = require('@electron/internal/common/error-utils')
+
+const callHandler = async function (handler, event, args, reply) {
+  try {
+    const result = await handler(event, ...args)
+    reply([null, result])
+  } catch (error) {
+    reply([errorUtils.serialize(error)])
+  }
+}
+
+exports.handle = function (channel, handler) {
+  ipcMain.on(channel, (event, requestId, ...args) => {
+    callHandler(handler, event, args, responseArgs => {
+      event._replyInternal(`${channel}_RESPONSE_${requestId}`, ...responseArgs)
+    })
+  })
+}
+
+exports.handleSync = function (channel, handler) {
+  ipcMain.on(channel, (event, ...args) => {
+    callHandler(handler, event, args, responseArgs => {
+      event.returnValue = responseArgs
+    })
+  })
+}
diff --git a/lib/renderer/inspector.js b/lib/renderer/inspector.js
index 5ed4e9d2be42..314301a9d6a5 100644
--- a/lib/renderer/inspector.js
+++ b/lib/renderer/inspector.js
@@ -1,6 +1,7 @@
 'use strict'
 
-const { getRemote, potentiallyRemoteRequire } = require('@electron/internal/renderer/remote')
+const ipcRenderer = require('@electron/internal/renderer/ipc-renderer-internal')
+const ipcRendererUtils = require('@electron/internal/renderer/ipc-renderer-internal-utils')
 
 window.onload = function () {
   // Use menu API to show context menu.
@@ -20,64 +21,16 @@ function completeURL (project, path) {
 }
 
 window.confirm = function (message, title) {
-  const dialog = getRemote('dialog')
-  if (title == null) {
-    title = ''
-  }
-  return !dialog.showMessageBox({
-    message: message,
-    title: title,
-    buttons: ['OK', 'Cancel'],
-    cancelId: 1
-  })
+  return ipcRendererUtils.invokeSync('ELECTRON_INSPECTOR_CONFIRM', message, title)
 }
 
-const convertToMenuTemplate = function (items) {
-  return items.map(function (item) {
-    const transformed = item.type === 'subMenu' ? {
-      type: 'submenu',
-      label: item.label,
-      enabled: item.enabled,
-      submenu: convertToMenuTemplate(item.subItems)
-    } : item.type === 'separator' ? {
-      type: 'separator'
-    } : item.type === 'checkbox' ? {
-      type: 'checkbox',
-      label: item.label,
-      enabled: item.enabled,
-      checked: item.checked
-    } : {
-      type: 'normal',
-      label: item.label,
-      enabled: item.enabled
-    }
+ipcRenderer.on('ELECTRON_INSPECTOR_CONTEXT_MENU_CLICK', function (event, id) {
+  window.DevToolsAPI.contextMenuItemSelected(id)
+})
 
-    if (item.id != null) {
-      transformed.click = function () {
-        window.DevToolsAPI.contextMenuItemSelected(item.id)
-        return window.DevToolsAPI.contextMenuCleared()
-      }
-    }
-
-    return transformed
-  })
-}
-
-const createMenu = function (x, y, items) {
-  const Menu = getRemote('Menu')
-
-  let template = convertToMenuTemplate(items)
-  if (useEditMenuItems(x, y, template)) {
-    template = getEditMenuItems()
-  }
-  const menu = Menu.buildFromTemplate(template)
-
-  // The menu is expected to show asynchronously.
-  setTimeout(function () {
-    const getCurrentWindow = getRemote('getCurrentWindow')
-    menu.popup({ window: getCurrentWindow() })
-  })
-}
+ipcRenderer.on('ELECTRON_INSPECTOR_CONTEXT_MENU_CLOSE', function () {
+  window.DevToolsAPI.contextMenuCleared()
+})
 
 const useEditMenuItems = function (x, y, items) {
   return items.length === 0 && document.elementsFromPoint(x, y).some(function (element) {
@@ -85,49 +38,21 @@ const useEditMenuItems = function (x, y, items) {
   })
 }
 
-const getEditMenuItems = function () {
-  return [
-    {
-      role: 'undo'
-    },
-    {
-      role: 'redo'
-    },
-    {
-      type: 'separator'
-    },
-    {
-      role: 'cut'
-    },
-    {
-      role: 'copy'
-    },
-    {
-      role: 'paste'
-    },
-    {
-      role: 'pasteAndMatchStyle'
-    },
-    {
-      role: 'delete'
-    },
-    {
-      role: 'selectAll'
-    }
-  ]
+const createMenu = function (x, y, items) {
+  const isEditMenu = useEditMenuItems(x, y, items)
+  ipcRendererUtils.invoke('ELECTRON_INSPECTOR_CONTEXT_MENU', items, isEditMenu)
 }
 
 const showFileChooserDialog = function (callback) {
-  const dialog = getRemote('dialog')
-  const files = dialog.showOpenDialog({})
-  if (files != null) {
-    callback(pathToHtml5FileObject(files[0]))
-  }
+  ipcRendererUtils.invoke('ELECTRON_INSPECTOR_SELECT_FILE').then(([path, data]) => {
+    if (path && data) {
+      callback(dataToHtml5FileObject(path, data))
+    }
+  })
 }
 
-const pathToHtml5FileObject = function (path) {
-  const fs = potentiallyRemoteRequire('fs')
-  const blob = new Blob([fs.readFileSync(path)])
+const dataToHtml5FileObject = function (path, data) {
+  const blob = new Blob([data])
   blob.name = path
   return blob
 }
diff --git a/lib/renderer/ipc-renderer-internal-utils.js b/lib/renderer/ipc-renderer-internal-utils.js
new file mode 100644
index 000000000000..e0c71aa4bf45
--- /dev/null
+++ b/lib/renderer/ipc-renderer-internal-utils.js
@@ -0,0 +1,30 @@
+'use strict'
+
+const ipcRenderer = require('@electron/internal/renderer/ipc-renderer-internal')
+const errorUtils = require('@electron/internal/common/error-utils')
+
+let nextId = 0
+
+exports.invoke = function (command, ...args) {
+  return new Promise((resolve, reject) => {
+    const requestId = ++nextId
+    ipcRenderer.once(`${command}_RESPONSE_${requestId}`, (event, error, result) => {
+      if (error) {
+        reject(errorUtils.deserialize(error))
+      } else {
+        resolve(result)
+      }
+    })
+    ipcRenderer.send(command, requestId, ...args)
+  })
+}
+
+exports.invokeSync = function (command, ...args) {
+  const [ error, result ] = ipcRenderer.sendSync(command, ...args)
+
+  if (error) {
+    throw errorUtils.deserialize(error)
+  } else {
+    return result
+  }
+}
diff --git a/lib/renderer/window-setup.js b/lib/renderer/window-setup.js
index b4801a88681d..76817c67a7c9 100644
--- a/lib/renderer/window-setup.js
+++ b/lib/renderer/window-setup.js
@@ -5,8 +5,6 @@
 // needs.
 
 // This file implements the following APIs:
-// - window.alert()
-// - window.confirm()
 // - window.history.back()
 // - window.history.forward()
 // - window.history.go()