diff --git a/build/gulpfile.vscode.js b/build/gulpfile.vscode.js
index 5c8abb020ef..c4c06a7e64c 100644
--- a/build/gulpfile.vscode.js
+++ b/build/gulpfile.vscode.js
@@ -157,7 +157,7 @@ function packageTask(platform, arch, sourceFolderName, destinationFolderName, op
 			'vs/workbench/workbench.desktop.main.js',
 			'vs/workbench/workbench.desktop.main.css',
 			'vs/workbench/services/extensions/node/extensionHostProcess.js',
-			'vs/code/electron-browser/workbench/preload.js',
+			'vs/code/electron-browser/preload.js',
 			'vs/code/electron-browser/workbench/workbench.html',
 			'vs/code/electron-browser/workbench/workbench.js'
 		]);
diff --git a/src/vs/base/electron-sandbox/globals.ts b/src/vs/base/electron-sandbox/globals.ts
index a5f420cbd1b..414e531765d 100644
--- a/src/vs/base/electron-sandbox/globals.ts
+++ b/src/vs/base/electron-sandbox/globals.ts
@@ -11,6 +11,12 @@ export const ipcRenderer = (window as any).vscode.ipcRenderer as {
 	 */
 	on(channel: string, listener: Function): void;
 
+	/**
+	 * Adds a one time `listener` function for the event. This `listener` is invoked
+	 * only the next time a message is sent to `channel`, after which it is removed.
+	 */
+	once(channel: string, listener: Function): void;
+
 	/**
 	 * Removes the specified `listener` from the listener array for the specified
 	 * `channel`.
@@ -32,3 +38,11 @@ export const ipcRenderer = (window as any).vscode.ipcRenderer as {
 	 */
 	send(channel: string, ...args: any[]): void;
 };
+
+export const webFrame = (window as any).vscode.webFrame as {
+
+	/**
+	 * The current zoom factor.
+	 */
+	getZoomFactor(): number;
+};
diff --git a/src/vs/base/parts/contextmenu/electron-browser/contextmenu.ts b/src/vs/base/parts/contextmenu/electron-sandbox/contextmenu.ts
similarity index 97%
rename from src/vs/base/parts/contextmenu/electron-browser/contextmenu.ts
rename to src/vs/base/parts/contextmenu/electron-sandbox/contextmenu.ts
index da008e59930..a08b8a54278 100644
--- a/src/vs/base/parts/contextmenu/electron-browser/contextmenu.ts
+++ b/src/vs/base/parts/contextmenu/electron-sandbox/contextmenu.ts
@@ -3,7 +3,7 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
-import { ipcRenderer, Event } from 'electron';
+import { ipcRenderer } from 'vs/base/electron-sandbox/globals';
 import { IContextMenuItem, ISerializableContextMenuItem, CONTEXT_MENU_CLOSE_CHANNEL, CONTEXT_MENU_CHANNEL, IPopupOptions, IContextMenuEvent } from 'vs/base/parts/contextmenu/common/contextmenu';
 
 let contextMenuIdPool = 0;
diff --git a/src/vs/code/electron-browser/issue/issueReporterMain.ts b/src/vs/code/electron-browser/issue/issueReporterMain.ts
index 0bca9e03a6f..406df2dc41e 100644
--- a/src/vs/code/electron-browser/issue/issueReporterMain.ts
+++ b/src/vs/code/electron-browser/issue/issueReporterMain.ts
@@ -27,7 +27,7 @@ import { EnvironmentService, INativeEnvironmentService } from 'vs/platform/envir
 import { InstantiationService } from 'vs/platform/instantiation/common/instantiationService';
 import { ServiceCollection } from 'vs/platform/instantiation/common/serviceCollection';
 import { IMainProcessService } from 'vs/platform/ipc/common/mainProcessService';
-import { MainProcessService } from 'vs/platform/ipc/electron-browser/mainProcessService';
+import { MainProcessService } from 'vs/platform/ipc/electron-sandbox/mainProcessService';
 import { ISharedProcessService } from 'vs/platform/ipc/electron-browser/sharedProcessService';
 import { ISettingsSearchIssueReporterData, IssueReporterData, IssueReporterExtensionData, IssueReporterFeatures, IssueReporterStyles, IssueType } from 'vs/platform/issue/common/issue';
 import { getLogLevel, ILogService } from 'vs/platform/log/common/log';
diff --git a/src/vs/code/electron-browser/workbench/preload.js b/src/vs/code/electron-browser/preload.js
similarity index 71%
rename from src/vs/code/electron-browser/workbench/preload.js
rename to src/vs/code/electron-browser/preload.js
index 07802dd616c..20012388f48 100644
--- a/src/vs/code/electron-browser/workbench/preload.js
+++ b/src/vs/code/electron-browser/preload.js
@@ -7,7 +7,7 @@
 (function () {
 	'use strict';
 
-	const { ipcRenderer } = require('electron');
+	const { ipcRenderer, webFrame } = require('electron');
 
 	// @ts-ignore
 	window.vscode = {
@@ -15,6 +15,8 @@
 		/**
 		 * A minimal set of methods exposed from ipcRenderer
 		 * to support communication to electron-main
+		 *
+		 * @type {typeof import('../../base/electron-sandbox/globals').ipcRenderer}
 		 */
 		ipcRenderer: {
 
@@ -38,6 +40,16 @@
 				ipcRenderer.on(channel, listener);
 			},
 
+			/**
+			 * @param {string} channel
+			 * @param {(event: import('electron').IpcRendererEvent, ...args: any[]) => void} listener
+			 */
+			once(channel, listener) {
+				validateIPC(channel);
+
+				ipcRenderer.once(channel, listener);
+			},
+
 			/**
 			 * @param {string} channel
 			 * @param {(event: import('electron').IpcRendererEvent, ...args: any[]) => void} listener
@@ -47,6 +59,18 @@
 
 				ipcRenderer.removeListener(channel, listener);
 			}
+		},
+
+		/**
+		 * Support for methods of webFrame type.
+		 *
+		 * @type {typeof import('../../base/electron-sandbox/globals').webFrame}
+		 */
+		webFrame: {
+
+			getZoomFactor() {
+				return webFrame.getZoomFactor();
+			}
 		}
 	};
 
diff --git a/src/vs/code/electron-browser/processExplorer/processExplorerMain.ts b/src/vs/code/electron-browser/processExplorer/processExplorerMain.ts
index 9091e788eed..77575f4ce35 100644
--- a/src/vs/code/electron-browser/processExplorer/processExplorerMain.ts
+++ b/src/vs/code/electron-browser/processExplorer/processExplorerMain.ts
@@ -13,7 +13,7 @@ import { ProcessExplorerStyles, ProcessExplorerData } from 'vs/platform/issue/co
 import * as browser from 'vs/base/browser/browser';
 import * as platform from 'vs/base/common/platform';
 import { IContextMenuItem } from 'vs/base/parts/contextmenu/common/contextmenu';
-import { popup } from 'vs/base/parts/contextmenu/electron-browser/contextmenu';
+import { popup } from 'vs/base/parts/contextmenu/electron-sandbox/contextmenu';
 import { ProcessItem } from 'vs/base/common/processes';
 import { addDisposableListener } from 'vs/base/browser/dom';
 import { DisposableStore } from 'vs/base/common/lifecycle';
diff --git a/src/vs/code/electron-main/window.ts b/src/vs/code/electron-main/window.ts
index db8c6db420a..c0c2c435c72 100644
--- a/src/vs/code/electron-main/window.ts
+++ b/src/vs/code/electron-main/window.ts
@@ -779,7 +779,7 @@ export class CodeWindow extends Disposable implements ICodeWindow {
 	}
 
 	private doGetPreloadUrl(): string {
-		return `${require.toUrl('vs/code/electron-browser/workbench/preload.js')}`;
+		return require.toUrl('vs/code/electron-browser/preload.js');
 	}
 
 	serializeWindowState(): IWindowState {
diff --git a/src/vs/platform/issue/electron-main/issueMainService.ts b/src/vs/platform/issue/electron-main/issueMainService.ts
index 94c599a5f38..d32efddec73 100644
--- a/src/vs/platform/issue/electron-main/issueMainService.ts
+++ b/src/vs/platform/issue/electron-main/issueMainService.ts
@@ -18,6 +18,7 @@ import { ILogService } from 'vs/platform/log/common/log';
 import { IWindowState } from 'vs/platform/windows/electron-main/windows';
 import { listProcesses } from 'vs/base/node/ps';
 import { IDialogMainService } from 'vs/platform/dialogs/electron-main/dialogs';
+import { URI } from 'vs/base/common/uri';
 
 const DEFAULT_BACKGROUND_COLOR = '#1E1E1E';
 
@@ -189,6 +190,7 @@ export class IssueMainService implements IIssueService {
 						title: localize('issueReporter', "Issue Reporter"),
 						backgroundColor: data.styles.backgroundColor || DEFAULT_BACKGROUND_COLOR,
 						webPreferences: {
+							preload: URI.parse(require.toUrl('vs/code/electron-browser/preload.js')).fsPath,
 							nodeIntegration: true,
 							enableWebSQL: false
 						}
@@ -239,6 +241,7 @@ export class IssueMainService implements IIssueService {
 						backgroundColor: data.styles.backgroundColor,
 						title: localize('processExplorer', "Process Explorer"),
 						webPreferences: {
+							preload: URI.parse(require.toUrl('vs/code/electron-browser/preload.js')).fsPath,
 							nodeIntegration: true,
 							enableWebSQL: false
 						}
diff --git a/src/vs/workbench/services/contextmenu/electron-browser/contextmenuService.ts b/src/vs/workbench/services/contextmenu/electron-sandbox/contextmenuService.ts
similarity index 98%
rename from src/vs/workbench/services/contextmenu/electron-browser/contextmenuService.ts
rename to src/vs/workbench/services/contextmenu/electron-sandbox/contextmenuService.ts
index 70a68b7f35f..2290ea667c7 100644
--- a/src/vs/workbench/services/contextmenu/electron-browser/contextmenuService.ts
+++ b/src/vs/workbench/services/contextmenu/electron-sandbox/contextmenuService.ts
@@ -9,7 +9,7 @@ import * as dom from 'vs/base/browser/dom';
 import { IContextMenuService, IContextViewService } from 'vs/platform/contextview/browser/contextView';
 import { ITelemetryService } from 'vs/platform/telemetry/common/telemetry';
 import { IKeybindingService } from 'vs/platform/keybinding/common/keybinding';
-import { webFrame } from 'electron';
+import { webFrame } from 'vs/base/electron-sandbox/globals';
 import { unmnemonicLabel } from 'vs/base/common/labels';
 import { Event, Emitter } from 'vs/base/common/event';
 import { INotificationService } from 'vs/platform/notification/common/notification';
@@ -17,7 +17,7 @@ import { IContextMenuDelegate, ContextSubMenu, IContextMenuEvent } from 'vs/base
 import { once } from 'vs/base/common/functional';
 import { Disposable } from 'vs/base/common/lifecycle';
 import { IContextMenuItem } from 'vs/base/parts/contextmenu/common/contextmenu';
-import { popup } from 'vs/base/parts/contextmenu/electron-browser/contextmenu';
+import { popup } from 'vs/base/parts/contextmenu/electron-sandbox/contextmenu';
 import { getTitleBarStyle } from 'vs/platform/windows/common/windows';
 import { isMacintosh } from 'vs/base/common/platform';
 import { IConfigurationService } from 'vs/platform/configuration/common/configuration';
diff --git a/src/vs/workbench/workbench.desktop.main.ts b/src/vs/workbench/workbench.desktop.main.ts
index 96a0807b7c9..20b6eea1eaf 100644
--- a/src/vs/workbench/workbench.desktop.main.ts
+++ b/src/vs/workbench/workbench.desktop.main.ts
@@ -39,7 +39,6 @@ import 'vs/workbench/services/dialogs/electron-browser/dialogService';
 import 'vs/workbench/services/keybinding/electron-browser/nativeKeymapService';
 import 'vs/workbench/services/keybinding/electron-browser/keybinding.contribution';
 import 'vs/workbench/services/extensions/electron-browser/extensionService';
-import 'vs/workbench/services/contextmenu/electron-browser/contextmenuService';
 import 'vs/workbench/services/extensionManagement/electron-browser/extensionManagementServerService';
 import 'vs/workbench/services/extensionManagement/electron-browser/extensionTipsService';
 import 'vs/workbench/services/remote/electron-browser/remoteAgentServiceImpl';
diff --git a/src/vs/workbench/workbench.sandbox.main.ts b/src/vs/workbench/workbench.sandbox.main.ts
index 699e03efeeb..bd584574c96 100644
--- a/src/vs/workbench/workbench.sandbox.main.ts
+++ b/src/vs/workbench/workbench.sandbox.main.ts
@@ -18,6 +18,7 @@ import 'vs/workbench/services/userDataSync/electron-sandbox/storageKeysSyncRegis
 import 'vs/workbench/services/menubar/electron-sandbox/menubarService';
 import 'vs/workbench/services/issue/electron-sandbox/issueService';
 import 'vs/workbench/services/update/electron-sandbox/updateService';
+import 'vs/workbench/services/contextmenu/electron-sandbox/contextmenuService';
 
 //#endregion