diff --git a/cjs-entry-core.js b/cjs-entry-core.js
index 446726fafa3..ad2e49c5f51 100644
--- a/cjs-entry-core.js
+++ b/cjs-entry-core.js
@@ -25,5 +25,5 @@
  * This means that we can publish to CJS and ESM whilst maintaining the expected
  * import behaviour for CJS and ESM users.
  */
-const puppeteerExport = require('./lib/cjs/puppeteer/node-puppeteer-core');
+const puppeteerExport = require('./lib/cjs/puppeteer/node-puppeteer-core.js');
 module.exports = puppeteerExport.default;
diff --git a/cjs-entry.js b/cjs-entry.js
index d1840a9bea1..70c262a9b78 100644
--- a/cjs-entry.js
+++ b/cjs-entry.js
@@ -25,5 +25,5 @@
  * This means that we can publish to CJS and ESM whilst maintaining the expected
  * import behaviour for CJS and ESM users.
  */
-const puppeteerExport = require('./lib/cjs/puppeteer/node');
+const puppeteerExport = require('./lib/cjs/puppeteer/node.js');
 module.exports = puppeteerExport.default;
diff --git a/compat/cjs/compat.ts b/compat/cjs/compat.ts
index 50dd7695be6..8bd871b20b8 100644
--- a/compat/cjs/compat.ts
+++ b/compat/cjs/compat.ts
@@ -1,3 +1,19 @@
+/**
+ * Copyright 2022 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 { dirname } from 'path';
 
 export const puppeteerDirname = dirname(dirname(dirname(__dirname)));
diff --git a/compat/esm/compat.ts b/compat/esm/compat.ts
index 5d761f74184..1decaefb280 100644
--- a/compat/esm/compat.ts
+++ b/compat/esm/compat.ts
@@ -1,3 +1,19 @@
+/**
+ * Copyright 2022 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 { dirname } from 'path';
 import { fileURLToPath } from 'url';
 
diff --git a/install.js b/install.js
index 11518a595f5..87fa7a32dbb 100644
--- a/install.js
+++ b/install.js
@@ -24,7 +24,7 @@
  * necessary.
  */
 
-const compileTypeScriptIfRequired = require('./typescript-if-required');
+const compileTypeScriptIfRequired = require('./typescript-if-required.js');
 
 async function download() {
   await compileTypeScriptIfRequired();
@@ -32,7 +32,7 @@ async function download() {
   const {
     downloadBrowser,
     logPolitely,
-  } = require('./lib/cjs/puppeteer/node/install');
+  } = require('./lib/cjs/puppeteer/node/install.js');
 
   if (process.env.PUPPETEER_SKIP_DOWNLOAD) {
     logPolitely(
diff --git a/mocha-config/coverage-tests.js b/mocha-config/coverage-tests.js
index 6814f404cf0..0525532caf5 100644
--- a/mocha-config/coverage-tests.js
+++ b/mocha-config/coverage-tests.js
@@ -1,4 +1,4 @@
-const base = require('./base');
+const base = require('./base.js');
 
 module.exports = {
   ...base,
diff --git a/mocha-config/doclint-tests.js b/mocha-config/doclint-tests.js
index 279e28eb177..e6e817a3a6a 100644
--- a/mocha-config/doclint-tests.js
+++ b/mocha-config/doclint-tests.js
@@ -1,4 +1,4 @@
-const base = require('./base');
+const base = require('./base.js');
 
 module.exports = {
   ...base,
diff --git a/mocha-config/puppeteer-unit-tests.js b/mocha-config/puppeteer-unit-tests.js
index be39c5b9ae6..2f03705190e 100644
--- a/mocha-config/puppeteer-unit-tests.js
+++ b/mocha-config/puppeteer-unit-tests.js
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-const base = require('./base');
+const base = require('./base.js');
 
 module.exports = {
   ...base,
diff --git a/package.json b/package.json
index 0ea5da3ed75..c9573a727da 100644
--- a/package.json
+++ b/package.json
@@ -67,61 +67,61 @@
   "author": "The Chromium Authors",
   "license": "Apache-2.0",
   "dependencies": {
+    "cross-fetch": "3.1.5",
     "debug": "4.3.3",
     "devtools-protocol": "0.0.960912",
     "extract-zip": "2.0.1",
     "https-proxy-agent": "5.0.0",
-    "node-fetch": "2.6.7",
     "pkg-dir": "4.2.0",
     "progress": "2.0.3",
     "proxy-from-env": "1.1.0",
     "rimraf": "3.0.2",
     "tar-fs": "2.1.1",
     "unbzip2-stream": "1.4.3",
-    "ws": "8.2.3"
+    "ws": "8.5.0"
   },
   "devDependencies": {
-    "@commitlint/cli": "13.2.0",
+    "@commitlint/cli": "16.1.0",
     "@commitlint/config-conventional": "16.0.0",
-    "@microsoft/api-documenter": "7.13.65",
-    "@microsoft/api-extractor": "7.18.15",
+    "@microsoft/api-documenter": "7.15.1",
+    "@microsoft/api-extractor": "7.19.4",
     "@types/debug": "4.1.7",
     "@types/mime": "2.0.3",
-    "@types/mocha": "9.0.0",
-    "@types/node": "17.0.15",
+    "@types/mocha": "9.1.0",
+    "@types/node": "17.0.16",
     "@types/progress": "2.0.5",
     "@types/proxy-from-env": "1.0.1",
     "@types/rimraf": "3.0.2",
-    "@types/sinon": "10.0.4",
+    "@types/sinon": "10.0.11",
     "@types/tar-fs": "2.0.1",
-    "@types/ws": "8.2.0",
-    "@typescript-eslint/eslint-plugin": "4.23.0",
-    "@typescript-eslint/parser": "4.33.0",
-    "@web/test-runner": "0.13.18",
-    "commonmark": "0.29.3",
+    "@types/ws": "8.2.2",
+    "@typescript-eslint/eslint-plugin": "5.11.0",
+    "@typescript-eslint/parser": "5.11.0",
+    "@web/test-runner": "0.13.27",
+    "commonmark": "0.30.0",
     "cross-env": "7.0.3",
-    "eslint": "7.32.0",
+    "eslint": "8.8.0",
     "eslint-config-prettier": "8.3.0",
-    "eslint-plugin-import": "2.22.1",
-    "eslint-plugin-mocha": "9.0.0",
+    "eslint-plugin-import": "2.25.4",
+    "eslint-plugin-mocha": "10.0.3",
     "eslint-plugin-prettier": "4.0.0",
-    "eslint-plugin-unicorn": "37.0.1",
+    "eslint-plugin-unicorn": "40.1.0",
     "esprima": "4.0.1",
     "expect": "25.2.7",
-    "husky": "7.0.2",
+    "husky": "7.0.4",
     "jpeg-js": "0.4.3",
-    "mime": "2.5.2",
+    "mime": "3.0.0",
     "minimist": "1.2.5",
-    "mocha": "9.1.3",
+    "mocha": "9.2.0",
     "ncp": "2.0.0",
     "pixelmatch": "5.2.1",
     "pngjs": "6.0.0",
-    "prettier": "2.3.0",
-    "sinon": "9.2.4",
-    "source-map-support": "0.5.19",
+    "prettier": "2.5.1",
+    "sinon": "13.0.1",
+    "source-map-support": "0.5.21",
     "standard-version": "9.3.2",
     "text-diff": "1.0.1",
-    "ts-node": "10.4.0",
+    "ts-node": "10.5.0",
     "typescript": "4.4.4"
   }
 }
diff --git a/src/common/BrowserConnector.ts b/src/common/BrowserConnector.ts
index 3a707b5f300..4693defd59d 100644
--- a/src/common/BrowserConnector.ts
+++ b/src/common/BrowserConnector.ts
@@ -19,9 +19,9 @@ import { Browser, TargetFilterCallback } from './Browser.js';
 import { assert } from './assert.js';
 import { debugError } from '../common/helper.js';
 import { Connection } from './Connection.js';
-import { getFetch } from './fetch.js';
 import { Viewport } from './PuppeteerViewport.js';
 import { isNode } from '../environment.js';
+import { getFetch } from './fetch.js';
 
 /**
  * Generic browser options that can be passed when launching any browser or when
diff --git a/src/common/Coverage.ts b/src/common/Coverage.ts
index 70061be94ea..4f94f6916c6 100644
--- a/src/common/Coverage.ts
+++ b/src/common/Coverage.ts
@@ -273,12 +273,7 @@ export class JSCoverage {
     assert(this._enabled, 'JSCoverage is not enabled');
     this._enabled = false;
 
-    const result = await Promise.all<
-      Protocol.Profiler.TakePreciseCoverageResponse,
-      void,
-      void,
-      void
-    >([
+    const result = await Promise.all([
       this._client.send('Profiler.takePreciseCoverage'),
       this._client.send('Profiler.stopPreciseCoverage'),
       this._client.send('Profiler.disable'),
diff --git a/src/common/ExecutionContext.ts b/src/common/ExecutionContext.ts
index f51b8a42ed5..631b236a173 100644
--- a/src/common/ExecutionContext.ts
+++ b/src/common/ExecutionContext.ts
@@ -133,7 +133,7 @@ export class ExecutionContext {
    *
    * @returns A promise that resolves to the return value of the given function.
    */
-  async evaluate<ReturnType extends any>(
+  async evaluate<ReturnType>(
     pageFunction: Function | string,
     ...args: unknown[]
   ): Promise<ReturnType> {
diff --git a/src/common/Page.ts b/src/common/Page.ts
index 1b2695b4a51..43974162237 100644
--- a/src/common/Page.ts
+++ b/src/common/Page.ts
@@ -1795,7 +1795,7 @@ export class Page extends EventEmitter {
    *   more than 2 network connections for at least `500` ms.
    */
   async reload(options?: WaitForOptions): Promise<HTTPResponse | null> {
-    const result = await Promise.all<HTTPResponse, void>([
+    const result = await Promise.all([
       this.waitForNavigation(options),
       this._client.send('Page.reload'),
     ]);
diff --git a/src/common/WebWorker.ts b/src/common/WebWorker.ts
index 8131e8a9efd..ce090db6ecd 100644
--- a/src/common/WebWorker.ts
+++ b/src/common/WebWorker.ts
@@ -138,7 +138,7 @@ export class WebWorker extends EventEmitter {
    * @param args - Arguments to pass to `pageFunction`.
    * @returns Promise which resolves to the return value of `pageFunction`.
    */
-  async evaluate<ReturnType extends any>(
+  async evaluate<ReturnType>(
     pageFunction: Function | string,
     ...args: any[]
   ): Promise<ReturnType> {
diff --git a/src/common/fetch.ts b/src/common/fetch.ts
index ae4b65c45f0..8f41553b04a 100644
--- a/src/common/fetch.ts
+++ b/src/common/fetch.ts
@@ -18,5 +18,5 @@ import { isNode } from '../environment.js';
 
 /* Use the global version if we're in the browser, else load the node-fetch module. */
 export const getFetch = async (): Promise<typeof fetch> => {
-  return isNode ? await import('node-fetch') : globalThis.fetch;
+  return isNode ? (await import('cross-fetch')).fetch : globalThis.fetch;
 };
diff --git a/src/common/helper.ts b/src/common/helper.ts
index aa0dea6854a..40c9ecd8c6d 100644
--- a/src/common/helper.ts
+++ b/src/common/helper.ts
@@ -127,7 +127,7 @@ function isNumber(obj: unknown): obj is number {
   return typeof obj === 'number' || obj instanceof Number;
 }
 
-async function waitForEvent<T extends any>(
+async function waitForEvent<T>(
   emitter: CommonEventEmitter,
   eventName: string | symbol,
   predicate: (event: T) => Promise<boolean> | boolean,
@@ -295,7 +295,7 @@ function makePredicateString(
     })() `;
 }
 
-async function waitWithTimeout<T extends any>(
+async function waitWithTimeout<T>(
   promise: Promise<T>,
   taskName: string,
   timeout: number
diff --git a/src/compat.ts b/src/compat.ts
index 873dcea7966..cc48163eb67 100644
--- a/src/compat.ts
+++ b/src/compat.ts
@@ -1,3 +1,19 @@
+/**
+ * Copyright 2022 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.
+ */
+
 declare const puppeteerDirname: string;
 
 export { puppeteerDirname };
diff --git a/src/initialize-node.ts b/src/initialize-node.ts
index 17f41027513..1e8bd755430 100644
--- a/src/initialize-node.ts
+++ b/src/initialize-node.ts
@@ -16,12 +16,12 @@
 
 import { PuppeteerNode } from './node/Puppeteer.js';
 import { PUPPETEER_REVISIONS } from './revisions.js';
-import pkgDir from 'pkg-dir';
+import { sync } from 'pkg-dir';
 import { Product } from './common/Product.js';
 import { puppeteerDirname } from './compat.js';
 
 export const initializePuppeteerNode = (packageName: string): PuppeteerNode => {
-  const puppeteerRootDirectory = pkgDir.sync(puppeteerDirname);
+  const puppeteerRootDirectory = sync(puppeteerDirname);
 
   let preferredRevision = PUPPETEER_REVISIONS.chromium;
   const isPuppeteerCore = packageName === 'puppeteer-core';
diff --git a/test/assert-coverage-test.js b/test/assert-coverage-test.js
index 6e26a1121ad..28b25dab948 100644
--- a/test/assert-coverage-test.js
+++ b/test/assert-coverage-test.js
@@ -1,5 +1,5 @@
 const { describe, it } = require('mocha');
-const { getCoverageResults } = require('./coverage-utils');
+const { getCoverageResults } = require('./coverage-utils.js');
 const expect = require('expect');
 
 describe('API coverage test', () => {
diff --git a/test/run_static_server.js b/test/run_static_server.js
index 6779e8816a4..0cd10f26466 100755
--- a/test/run_static_server.js
+++ b/test/run_static_server.js
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 const path = require('path');
-const { TestServer } = require('../utils/testserver/');
+const { TestServer } = require('../utils/testserver/index.js');
 
 const port = 8907;
 const httpsPort = 8908;
diff --git a/test/utils.js b/test/utils.js
index 935b44d98ef..f70cb47e714 100644
--- a/test/utils.js
+++ b/test/utils.js
@@ -20,7 +20,7 @@
 const fs = require('fs');
 const path = require('path');
 const expect = require('expect');
-const GoldenUtils = require('./golden-utils');
+const GoldenUtils = require('./golden-utils.js');
 const PROJECT_ROOT = fs.existsSync(path.join(__dirname, '..', 'package.json'))
   ? path.join(__dirname, '..')
   : path.join(__dirname, '..', '..');
diff --git a/utils/check_availability.js b/utils/check_availability.js
index ba8129554d4..3241dd543c7 100755
--- a/utils/check_availability.js
+++ b/utils/check_availability.js
@@ -172,7 +172,7 @@ async function checkRollCandidate(channel) {
     10
   );
   const currentRevision = parseInt(
-    require('../lib/cjs/puppeteer/revisions').PUPPETEER_REVISIONS.chromium,
+    require('../lib/cjs/puppeteer/revisions.js').PUPPETEER_REVISIONS.chromium,
     10
   );
 
diff --git a/utils/doclint/check_public_api/JSBuilder.js b/utils/doclint/check_public_api/JSBuilder.js
index 0994dffcff5..ebb00209f72 100644
--- a/utils/doclint/check_public_api/JSBuilder.js
+++ b/utils/doclint/check_public_api/JSBuilder.js
@@ -1,6 +1,6 @@
 const ts = require('typescript');
 const path = require('path');
-const Documentation = require('./Documentation');
+const Documentation = require('./Documentation.js');
 module.exports = checkSources;
 
 /**
diff --git a/utils/doclint/check_public_api/MDBuilder.js b/utils/doclint/check_public_api/MDBuilder.js
index 46a4e6cfce5..3776489f8c7 100644
--- a/utils/doclint/check_public_api/MDBuilder.js
+++ b/utils/doclint/check_public_api/MDBuilder.js
@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-const Documentation = require('./Documentation');
-const commonmark = require('commonmark');
+const Documentation = require('./Documentation.js');
+const { Parser, HtmlRenderer } = require('commonmark');
 
 class MDOutline {
   /**
@@ -25,9 +25,9 @@ class MDOutline {
    */
   static async create(page, text) {
     // Render markdown as HTML.
-    const reader = new commonmark.Parser();
+    const reader = new Parser();
     const parsed = reader.parse(text);
-    const writer = new commonmark.HtmlRenderer();
+    const writer = new HtmlRenderer();
     const html = writer.render(parsed);
 
     page.on('console', (msg) => {
diff --git a/utils/doclint/check_public_api/index.js b/utils/doclint/check_public_api/index.js
index 4e49e53223b..4c408f9a5ab 100644
--- a/utils/doclint/check_public_api/index.js
+++ b/utils/doclint/check_public_api/index.js
@@ -14,13 +14,13 @@
  * limitations under the License.
  */
 
-const jsBuilder = require('./JSBuilder');
-const mdBuilder = require('./MDBuilder');
-const Documentation = require('./Documentation');
-const Message = require('../Message');
+const jsBuilder = require('./JSBuilder.js');
+const mdBuilder = require('./MDBuilder.js');
+const Documentation = require('./Documentation.js');
+const Message = require('../Message.js');
 const {
   MODULES_TO_CHECK_FOR_COVERAGE,
-} = require('../../../test/coverage-utils');
+} = require('../../../test/coverage-utils.js');
 
 const EXCLUDE_PROPERTIES = new Set([
   'Browser.create',
diff --git a/utils/doclint/cli.js b/utils/doclint/cli.js
index e2de3a818ff..9872a808604 100755
--- a/utils/doclint/cli.js
+++ b/utils/doclint/cli.js
@@ -15,9 +15,10 @@
  * limitations under the License.
  */
 
+// eslint-disable-next-line import/extensions
 const puppeteer = require('../..');
 const path = require('path');
-const Source = require('./Source');
+const Source = require('./Source.js');
 
 const PROJECT_DIR = path.join(__dirname, '..', '..');
 const VERSION = require(path.join(PROJECT_DIR, 'package.json')).version;
@@ -58,7 +59,7 @@ async function run() {
   );
   const mdSources = [readme, api, troubleshooting, contributing];
 
-  const preprocessor = require('./preprocessor');
+  const preprocessor = require('./preprocessor/index.js');
   messages.push(...(await preprocessor.runCommands(mdSources, VERSION)));
   messages.push(
     ...(await preprocessor.ensureReleasedAPILinks([readme], VERSION))
@@ -66,7 +67,7 @@ async function run() {
 
   const browser = await puppeteer.launch();
   const page = await browser.newPage();
-  const checkPublicAPI = require('./check_public_api');
+  const checkPublicAPI = require('./check_public_api/index.js');
   const tsSources = [
     /* Source.readdir doesn't deal with nested directories well.
      * Rather than invest time here when we're going to remove this Doc tooling soon
diff --git a/utils/doclint/preprocessor/index.js b/utils/doclint/preprocessor/index.js
index d026873d25e..9c5b951bb03 100644
--- a/utils/doclint/preprocessor/index.js
+++ b/utils/doclint/preprocessor/index.js
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-const Message = require('../Message');
+const Message = require('../Message.js');
 
 const IS_RELEASE = Boolean(process.env.IS_RELEASE);
 
diff --git a/utils/doclint/preprocessor/preprocessor.spec.js b/utils/doclint/preprocessor/preprocessor.spec.js
index 713785db8ff..86625e7d1c9 100644
--- a/utils/doclint/preprocessor/preprocessor.spec.js
+++ b/utils/doclint/preprocessor/preprocessor.spec.js
@@ -15,7 +15,7 @@
  */
 
 const { runCommands, ensureReleasedAPILinks } = require('.');
-const Source = require('../Source');
+const Source = require('../Source.js');
 const expect = require('expect');
 
 describe('doclint preprocessor specs', function () {