diff --git a/extensions/debug-auto-launch/.vscodeignore b/extensions/debug-auto-launch/.vscodeignore
index fccc815f34bf7..36e8b0714faf4 100644
--- a/extensions/debug-auto-launch/.vscodeignore
+++ b/extensions/debug-auto-launch/.vscodeignore
@@ -1,3 +1,5 @@
 src/**
 tsconfig.json
+out/**
+extension.webpack.config.js
 yarn.lock
\ No newline at end of file
diff --git a/extensions/debug-auto-launch/extension.webpack.config.js b/extensions/debug-auto-launch/extension.webpack.config.js
new file mode 100644
index 0000000000000..b474e65cbb130
--- /dev/null
+++ b/extensions/debug-auto-launch/extension.webpack.config.js
@@ -0,0 +1,20 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+//@ts-check
+
+'use strict';
+
+const withDefaults = require('../shared.webpack.config');
+
+module.exports = withDefaults({
+	context: __dirname,
+	entry: {
+		extension: './src/extension.ts',
+	},
+	resolve: {
+		mainFields: ['module', 'main']
+	}
+});
diff --git a/extensions/grunt/.vscodeignore b/extensions/grunt/.vscodeignore
index 7ab0ed662846f..9d384dd906105 100644
--- a/extensions/grunt/.vscodeignore
+++ b/extensions/grunt/.vscodeignore
@@ -1,4 +1,6 @@
 test/**
 src/**
 tsconfig.json
+out/**
+extension.webpack.config.js
 yarn.lock
\ No newline at end of file
diff --git a/extensions/grunt/extension.webpack.config.js b/extensions/grunt/extension.webpack.config.js
new file mode 100644
index 0000000000000..beee7b3d6762e
--- /dev/null
+++ b/extensions/grunt/extension.webpack.config.js
@@ -0,0 +1,20 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+//@ts-check
+
+'use strict';
+
+const withDefaults = require('../shared.webpack.config');
+
+module.exports = withDefaults({
+	context: __dirname,
+	entry: {
+		main: './src/main.ts',
+	},
+	resolve: {
+		mainFields: ['module', 'main']
+	}
+});
diff --git a/extensions/gulp/.vscodeignore b/extensions/gulp/.vscodeignore
index fccc815f34bf7..36e8b0714faf4 100644
--- a/extensions/gulp/.vscodeignore
+++ b/extensions/gulp/.vscodeignore
@@ -1,3 +1,5 @@
 src/**
 tsconfig.json
+out/**
+extension.webpack.config.js
 yarn.lock
\ No newline at end of file
diff --git a/extensions/gulp/extension.webpack.config.js b/extensions/gulp/extension.webpack.config.js
new file mode 100644
index 0000000000000..beee7b3d6762e
--- /dev/null
+++ b/extensions/gulp/extension.webpack.config.js
@@ -0,0 +1,20 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+//@ts-check
+
+'use strict';
+
+const withDefaults = require('../shared.webpack.config');
+
+module.exports = withDefaults({
+	context: __dirname,
+	entry: {
+		main: './src/main.ts',
+	},
+	resolve: {
+		mainFields: ['module', 'main']
+	}
+});
diff --git a/extensions/jake/.vscodeignore b/extensions/jake/.vscodeignore
index fccc815f34bf7..36e8b0714faf4 100644
--- a/extensions/jake/.vscodeignore
+++ b/extensions/jake/.vscodeignore
@@ -1,3 +1,5 @@
 src/**
 tsconfig.json
+out/**
+extension.webpack.config.js
 yarn.lock
\ No newline at end of file
diff --git a/extensions/jake/extension.webpack.config.js b/extensions/jake/extension.webpack.config.js
new file mode 100644
index 0000000000000..beee7b3d6762e
--- /dev/null
+++ b/extensions/jake/extension.webpack.config.js
@@ -0,0 +1,20 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+//@ts-check
+
+'use strict';
+
+const withDefaults = require('../shared.webpack.config');
+
+module.exports = withDefaults({
+	context: __dirname,
+	entry: {
+		main: './src/main.ts',
+	},
+	resolve: {
+		mainFields: ['module', 'main']
+	}
+});
diff --git a/extensions/markdown-language-features/.vscodeignore b/extensions/markdown-language-features/.vscodeignore
index f160e56011ad2..28cda32acfc09 100644
--- a/extensions/markdown-language-features/.vscodeignore
+++ b/extensions/markdown-language-features/.vscodeignore
@@ -6,3 +6,5 @@ out/**
 extension.webpack.config.js
 OSSREADME.json
 yarn.lock
+preview-src/**
+webpack.config.js