diff --git a/extensions/markdown-language-features/.vscodeignore b/extensions/markdown-language-features/.vscodeignore
index 30d948fbc66..bcb886a094d 100644
--- a/extensions/markdown-language-features/.vscodeignore
+++ b/extensions/markdown-language-features/.vscodeignore
@@ -4,6 +4,7 @@ tsconfig.json
 out/test/**
 out/**
 extension.webpack.config.js
+extension-browser.webpack.config.js
 cgmanifest.json
 yarn.lock
 preview-src/**
diff --git a/extensions/markdown-language-features/extension-browser.webpack.config.js b/extensions/markdown-language-features/extension-browser.webpack.config.js
new file mode 100644
index 00000000000..60d61c13dec
--- /dev/null
+++ b/extensions/markdown-language-features/extension-browser.webpack.config.js
@@ -0,0 +1,29 @@
+/*---------------------------------------------------------------------------------------------
+ *  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');
+const path = require('path');
+
+const clientConfig = withDefaults({
+	context: __dirname,
+	target: 'webworker',
+	entry: {
+		extension: './src/extension.ts'
+	},
+	resolve: {
+		alias: {
+			'vscode-extension-telemetry': path.resolve(__dirname, 'polyfills/vscode-extension-telemetry.js'),
+			'vscode-nls': path.resolve(__dirname, 'polyfills/vscode-nls.js'),
+		},
+	}
+});
+
+clientConfig.module.rules[0].use.shift(); // remove nls loader
+
+module.exports =  clientConfig;
diff --git a/extensions/markdown-language-features/package.json b/extensions/markdown-language-features/package.json
index 6d7b078caad..01bb8a06d03 100644
--- a/extensions/markdown-language-features/package.json
+++ b/extensions/markdown-language-features/package.json
@@ -12,6 +12,7 @@
 		"vscode": "^1.20.0"
 	},
 	"main": "./out/extension",
+	"browser": "./dist/extension.js",
 	"categories": [
 		"Programming Languages"
 	],
@@ -327,7 +328,9 @@
 		"watch": "npm run build-preview && gulp watch-extension:markdown-language-features",
 		"vscode:prepublish": "npm run build-ext && npm run build-preview",
 		"build-ext": "node ../../node_modules/gulp/bin/gulp.js --gulpfile ../../build/gulpfile.extensions.js compile-extension:markdown-language-features ./tsconfig.json",
-		"build-preview": "webpack --mode production"
+		"build-preview": "webpack --mode production",
+		"compile-web": "npx webpack-cli --config extension-browser.webpack.config --mode none",
+		"watch-web": "npx webpack-cli --config extension-browser.webpack.config --mode none --watch --info-verbosity verbose"
 	},
 	"dependencies": {
 		"highlight.js": "9.15.10",
diff --git a/extensions/markdown-language-features/polyfills/vscode-extension-telemetry.js b/extensions/markdown-language-features/polyfills/vscode-extension-telemetry.js
new file mode 100644
index 00000000000..d038776c59c
--- /dev/null
+++ b/extensions/markdown-language-features/polyfills/vscode-extension-telemetry.js
@@ -0,0 +1,26 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+'use strict';
+Object.defineProperty(exports, "__esModule", { value: true });
+
+let TelemetryReporter = (function () {
+	function TelemetryReporter(extensionId, extensionVersion, key) {
+	}
+	TelemetryReporter.prototype.updateUserOptIn = function (key) {
+	};
+	TelemetryReporter.prototype.createAppInsightsClient = function (key) {
+	};
+	TelemetryReporter.prototype.getCommonProperties = function () {
+	};
+	TelemetryReporter.prototype.sendTelemetryEvent = function (eventName, properties, measurements) {
+	};
+	TelemetryReporter.prototype.dispose = function () {
+	};
+	TelemetryReporter.TELEMETRY_CONFIG_ID = 'telemetry';
+	TelemetryReporter.TELEMETRY_CONFIG_ENABLED_ID = 'enableTelemetry';
+	return TelemetryReporter;
+}());
+exports.default = TelemetryReporter;
diff --git a/extensions/markdown-language-features/polyfills/vscode-nls.js b/extensions/markdown-language-features/polyfills/vscode-nls.js
new file mode 100644
index 00000000000..b89250102af
--- /dev/null
+++ b/extensions/markdown-language-features/polyfills/vscode-nls.js
@@ -0,0 +1,79 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+'use strict';
+Object.defineProperty(exports, "__esModule", { value: true });
+
+function format(message, args) {
+	let result;
+	// if (isPseudo) {
+	// 	// FF3B and FF3D is the Unicode zenkaku representation for [ and ]
+	// 	message = '\uFF3B' + message.replace(/[aouei]/g, '$&$&') + '\uFF3D';
+	// }
+	if (args.length === 0) {
+		result = message;
+	}
+	else {
+		result = message.replace(/\{(\d+)\}/g, function (match, rest) {
+			let index = rest[0];
+			let arg = args[index];
+			let replacement = match;
+			if (typeof arg === 'string') {
+				replacement = arg;
+			}
+			else if (typeof arg === 'number' || typeof arg === 'boolean' || arg === void 0 || arg === null) {
+				replacement = String(arg);
+			}
+			return replacement;
+		});
+	}
+	return result;
+}
+
+function localize(key, message) {
+	let args = [];
+	for (let _i = 2; _i < arguments.length; _i++) {
+		args[_i - 2] = arguments[_i];
+	}
+	return format(message, args);
+}
+
+function loadMessageBundle(file) {
+	return localize;
+}
+
+let MessageFormat;
+(function (MessageFormat) {
+	MessageFormat["file"] = "file";
+	MessageFormat["bundle"] = "bundle";
+	MessageFormat["both"] = "both";
+})(MessageFormat = exports.MessageFormat || (exports.MessageFormat = {}));
+let BundleFormat;
+(function (BundleFormat) {
+	// the nls.bundle format
+	BundleFormat["standalone"] = "standalone";
+	BundleFormat["languagePack"] = "languagePack";
+})(BundleFormat = exports.BundleFormat || (exports.BundleFormat = {}));
+
+exports.loadMessageBundle = loadMessageBundle;
+function config(opts) {
+	if (opts) {
+		if (isString(opts.locale)) {
+			options.locale = opts.locale.toLowerCase();
+			options.language = options.locale;
+			resolvedLanguage = undefined;
+			resolvedBundles = Object.create(null);
+		}
+		if (opts.messageFormat !== undefined) {
+			options.messageFormat = opts.messageFormat;
+		}
+		if (opts.bundleFormat === BundleFormat.standalone && options.languagePackSupport === true) {
+			options.languagePackSupport = false;
+		}
+	}
+	isPseudo = options.locale === 'pseudo';
+	return loadMessageBundle;
+}
+exports.config = config;
diff --git a/extensions/markdown-language-features/src/markdownEngine.ts b/extensions/markdown-language-features/src/markdownEngine.ts
index c500b692eaa..ed0cee54457 100644
--- a/extensions/markdown-language-features/src/markdownEngine.ts
+++ b/extensions/markdown-language-features/src/markdownEngine.ts
@@ -3,14 +3,14 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
-import * as crypto from 'crypto';
-import * as path from 'path';
 import { MarkdownIt, Token } from 'markdown-it';
+import * as path from 'path';
 import * as vscode from 'vscode';
 import { MarkdownContributionProvider as MarkdownContributionProvider } from './markdownExtensions';
 import { Slugifier } from './slugify';
 import { SkinnyTextDocument } from './tableOfContentsProvider';
-import { MarkdownFileExtensions, Schemes, isOfScheme } from './util/links';
+import { hash } from './util/hash';
+import { isOfScheme, MarkdownFileExtensions, Schemes } from './util/links';
 
 const UNICODE_NEWLINE_REGEX = /\u2028|\u2029/g;
 
@@ -197,9 +197,7 @@ export class MarkdownEngine {
 
 			const src = token.attrGet('src');
 			if (src) {
-				const hash = crypto.createHash('sha256');
-				hash.update(src);
-				const imgHash = hash.digest('hex');
+				const imgHash = hash(src);
 				token.attrSet('id', `image-hash-${imgHash}`);
 			}
 
diff --git a/extensions/markdown-language-features/src/util/hash.ts b/extensions/markdown-language-features/src/util/hash.ts
new file mode 100644
index 00000000000..b009808968d
--- /dev/null
+++ b/extensions/markdown-language-features/src/util/hash.ts
@@ -0,0 +1,58 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+/**
+ * Return a hash value for an object.
+ */
+export function hash(obj: any, hashVal = 0): number {
+	switch (typeof obj) {
+		case 'object':
+			if (obj === null) {
+				return numberHash(349, hashVal);
+			} else if (Array.isArray(obj)) {
+				return arrayHash(obj, hashVal);
+			}
+			return objectHash(obj, hashVal);
+		case 'string':
+			return stringHash(obj, hashVal);
+		case 'boolean':
+			return booleanHash(obj, hashVal);
+		case 'number':
+			return numberHash(obj, hashVal);
+		case 'undefined':
+			return 937 * 31;
+		default:
+			return numberHash(obj, 617);
+	}
+}
+
+function numberHash(val: number, initialHashVal: number): number {
+	return (((initialHashVal << 5) - initialHashVal) + val) | 0;  // hashVal * 31 + ch, keep as int32
+}
+
+function booleanHash(b: boolean, initialHashVal: number): number {
+	return numberHash(b ? 433 : 863, initialHashVal);
+}
+
+function stringHash(s: string, hashVal: number) {
+	hashVal = numberHash(149417, hashVal);
+	for (let i = 0, length = s.length; i < length; i++) {
+		hashVal = numberHash(s.charCodeAt(i), hashVal);
+	}
+	return hashVal;
+}
+
+function arrayHash(arr: any[], initialHashVal: number): number {
+	initialHashVal = numberHash(104579, initialHashVal);
+	return arr.reduce((hashVal, item) => hash(item, hashVal), initialHashVal);
+}
+
+function objectHash(obj: any, initialHashVal: number): number {
+	initialHashVal = numberHash(181387, initialHashVal);
+	return Object.keys(obj).sort().reduce((hashVal, key) => {
+		hashVal = stringHash(key, hashVal);
+		return hash(obj[key], hashVal);
+	}, initialHashVal);
+}