diff --git a/src/common/Puppeteer.ts b/src/common/Puppeteer.ts
index 503e1b5d20d..d324a09da4b 100644
--- a/src/common/Puppeteer.ts
+++ b/src/common/Puppeteer.ts
@@ -67,7 +67,8 @@ import { PUPPETEER_REVISIONS } from '../revisions.js';
  * @public
  */
 export class Puppeteer {
-  private _projectRoot: string;
+  // Will be undefined in a browser environment
+  private _projectRoot?: string;
   private _isPuppeteerCore: boolean;
   private _changedProduct = false;
   private __productName: string;
diff --git a/src/index-core.ts b/src/index-core.ts
index 600808a0f31..2bd07b930b9 100644
--- a/src/index-core.ts
+++ b/src/index-core.ts
@@ -14,7 +14,12 @@
  * limitations under the License.
  */
 
-import { initializePuppeteer } from './initialize.js';
+import { initializePuppeteerNode } from './initialize-node.js';
+import { isNode } from './environment.js';
+import { initializePuppeteerWeb } from './initialize-web.js';
 
-const puppeteer = initializePuppeteer('puppeteer-core');
+const initializeFunc = isNode
+  ? initializePuppeteerNode
+  : initializePuppeteerWeb;
+const puppeteer = initializeFunc('puppeteer-core');
 export default puppeteer;
diff --git a/src/index.ts b/src/index.ts
index 4d89fe4d535..8857d0bae97 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -14,7 +14,12 @@
  * limitations under the License.
  */
 
-import { initializePuppeteer } from './initialize.js';
+import { initializePuppeteerNode } from './initialize-node.js';
+import { isNode } from './environment.js';
+import { initializePuppeteerWeb } from './initialize-web.js';
 
-const puppeteer = initializePuppeteer('puppeteer');
+const initializeFunc = isNode
+  ? initializePuppeteerNode
+  : initializePuppeteerWeb;
+const puppeteer = initializeFunc('puppeteer');
 export default puppeteer;
diff --git a/src/initialize.ts b/src/initialize-node.ts
similarity index 94%
rename from src/initialize.ts
rename to src/initialize-node.ts
index 1c63a62ca3a..0ef0094f531 100644
--- a/src/initialize.ts
+++ b/src/initialize-node.ts
@@ -18,7 +18,7 @@ import { Puppeteer } from './common/Puppeteer.js';
 import { PUPPETEER_REVISIONS } from './revisions.js';
 import pkgDir from 'pkg-dir';
 
-export const initializePuppeteer = (packageName: string): Puppeteer => {
+export const initializePuppeteerNode = (packageName: string): Puppeteer => {
   const puppeteerRootDirectory = pkgDir.sync(__dirname);
 
   let preferredRevision = PUPPETEER_REVISIONS.chromium;
diff --git a/src/initialize-web.ts b/src/initialize-web.ts
new file mode 100644
index 00000000000..342f899698f
--- /dev/null
+++ b/src/initialize-web.ts
@@ -0,0 +1,34 @@
+/**
+ * Copyright 2020 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { Puppeteer } from './common/Puppeteer.js';
+
+export const initializePuppeteerWeb = (packageName: string): Puppeteer => {
+  const isPuppeteerCore = packageName === 'puppeteer-core';
+
+  // puppeteer-core ignores environment variables
+  return new Puppeteer(
+    // Product root directory is undefined as we're not concerned about
+    // downloading and installing browsers in the web environment.
+    undefined,
+    // Preferred revision is undefined as we use the browser we are running in.
+    undefined,
+    isPuppeteerCore,
+    // Preferred product is undefined as we use the browser we are
+    // running in.
+    undefined
+  );
+};