diff --git a/DeviceDescriptors.js b/DeviceDescriptors.js
index 05135a115368c..9b5345d4bdb36 100644
--- a/DeviceDescriptors.js
+++ b/DeviceDescriptors.js
@@ -14,4 +14,4 @@
  * limitations under the License.
  */
 
-module.exports = require('./lib/DeviceDescriptors');
+module.exports = require('./lib/common/DeviceDescriptors');
diff --git a/Errors.js b/Errors.js
index 4779e1d850812..e4bdabb1e948f 100644
--- a/Errors.js
+++ b/Errors.js
@@ -14,4 +14,4 @@
  * limitations under the License.
  */
 
-module.exports = require('./lib/Errors');
+module.exports = require('./lib/common/Errors');
diff --git a/src/api-docs-entry.ts b/src/api-docs-entry.ts
index 488f3b497ce2f..f5ee597ee9d55 100644
--- a/src/api-docs-entry.ts
+++ b/src/api-docs-entry.ts
@@ -23,26 +23,25 @@
  *
  * Once we have migrated to API Extractor and removed DocLint we can remove the duplication and use this file.
  */
-export * from './Accessibility';
-export * from './Browser';
+export * from './common/Accessibility';
+export * from './common/Browser';
 export * from './node/BrowserFetcher';
-export * from './Connection';
-export * from './ConsoleMessage';
-export * from './Coverage';
-export * from './Dialog';
-export * from './JSHandle';
-export * from './ExecutionContext';
-export * from './EventEmitter';
-export * from './FileChooser';
-export * from './FrameManager';
-export * from './JSHandle';
-export * from './Input';
-export * from './Page';
-export * from './Puppeteer';
-export * from './HTTPRequest';
-export * from './HTTPResponse';
-export * from './SecurityDetails';
-export * from './Target';
-export * from './Errors';
-export * from './Tracing';
-export * from './WebWorker';
+export * from './common/Connection';
+export * from './common/ConsoleMessage';
+export * from './common/Coverage';
+export * from './common/Dialog';
+export * from './common/JSHandle';
+export * from './common/ExecutionContext';
+export * from './common/EventEmitter';
+export * from './common/FileChooser';
+export * from './common/FrameManager';
+export * from './common/Input';
+export * from './common/Page';
+export * from './common/Puppeteer';
+export * from './common/HTTPRequest';
+export * from './common/HTTPResponse';
+export * from './common/SecurityDetails';
+export * from './common/Target';
+export * from './common/Errors';
+export * from './common/Tracing';
+export * from './common/WebWorker';
diff --git a/src/api.ts b/src/api.ts
index 5ac8f07d6a65f..ac5b5228dc4d4 100644
--- a/src/api.ts
+++ b/src/api.ts
@@ -19,30 +19,30 @@
  * 2) index.js uses it to iterate through all methods and call helper.installAsyncStackHooks on
  */
 module.exports = {
-  Accessibility: require('./Accessibility').Accessibility,
-  Browser: require('./Browser').Browser,
-  BrowserContext: require('./Browser').BrowserContext,
+  Accessibility: require('./common/Accessibility').Accessibility,
+  Browser: require('./common/Browser').Browser,
+  BrowserContext: require('./common/Browser').BrowserContext,
   BrowserFetcher: require('./node/BrowserFetcher').BrowserFetcher,
-  CDPSession: require('./Connection').CDPSession,
-  ConsoleMessage: require('./ConsoleMessage').ConsoleMessage,
-  Coverage: require('./Coverage').Coverage,
-  Dialog: require('./Dialog').Dialog,
-  ElementHandle: require('./JSHandle').ElementHandle,
-  ExecutionContext: require('./ExecutionContext').ExecutionContext,
-  EventEmitter: require('./EventEmitter').EventEmitter,
-  FileChooser: require('./FileChooser').FileChooser,
-  Frame: require('./FrameManager').Frame,
-  JSHandle: require('./JSHandle').JSHandle,
-  Keyboard: require('./Input').Keyboard,
-  Mouse: require('./Input').Mouse,
-  Page: require('./Page').Page,
-  Puppeteer: require('./Puppeteer').Puppeteer,
-  HTTPRequest: require('./HTTPRequest').HTTPRequest,
-  HTTPResponse: require('./HTTPResponse').HTTPResponse,
-  SecurityDetails: require('./SecurityDetails').SecurityDetails,
-  Target: require('./Target').Target,
-  TimeoutError: require('./Errors').TimeoutError,
-  Touchscreen: require('./Input').Touchscreen,
-  Tracing: require('./Tracing').Tracing,
-  WebWorker: require('./WebWorker').WebWorker,
+  CDPSession: require('./common/Connection').CDPSession,
+  ConsoleMessage: require('./common/ConsoleMessage').ConsoleMessage,
+  Coverage: require('./common/Coverage').Coverage,
+  Dialog: require('./common/Dialog').Dialog,
+  ElementHandle: require('./common/JSHandle').ElementHandle,
+  ExecutionContext: require('./common/ExecutionContext').ExecutionContext,
+  EventEmitter: require('./common/EventEmitter').EventEmitter,
+  FileChooser: require('./common/FileChooser').FileChooser,
+  Frame: require('./common/FrameManager').Frame,
+  JSHandle: require('./common/JSHandle').JSHandle,
+  Keyboard: require('./common/Input').Keyboard,
+  Mouse: require('./common/Input').Mouse,
+  Page: require('./common/Page').Page,
+  Puppeteer: require('./common/Puppeteer').Puppeteer,
+  HTTPRequest: require('./common/HTTPRequest').HTTPRequest,
+  HTTPResponse: require('./common/HTTPResponse').HTTPResponse,
+  SecurityDetails: require('./common/SecurityDetails').SecurityDetails,
+  Target: require('./common/Target').Target,
+  TimeoutError: require('./common/Errors').TimeoutError,
+  Touchscreen: require('./common/Input').Touchscreen,
+  Tracing: require('./common/Tracing').Tracing,
+  WebWorker: require('./common/WebWorker').WebWorker,
 };
diff --git a/src/Accessibility.ts b/src/common/Accessibility.ts
similarity index 99%
rename from src/Accessibility.ts
rename to src/common/Accessibility.ts
index 2746119f825fe..23f5627a8e815 100644
--- a/src/Accessibility.ts
+++ b/src/common/Accessibility.ts
@@ -16,7 +16,7 @@
 
 import { CDPSession } from './Connection';
 import { ElementHandle } from './JSHandle';
-import Protocol from './protocol';
+import Protocol from '../protocol';
 
 /**
  * Represents a Node and the properties of it that are relevant to Accessibility.
diff --git a/src/Browser.ts b/src/common/Browser.ts
similarity index 99%
rename from src/Browser.ts
rename to src/common/Browser.ts
index 562bfd30fff8e..8aa7d7a291ad6 100644
--- a/src/Browser.ts
+++ b/src/common/Browser.ts
@@ -19,7 +19,7 @@ import { helper } from './helper';
 import { Target } from './Target';
 import { EventEmitter } from './EventEmitter';
 import { Events } from './Events';
-import Protocol from './protocol';
+import Protocol from '../protocol';
 import { Connection } from './Connection';
 import { Page } from './Page';
 import { ChildProcess } from 'child_process';
diff --git a/src/Connection.ts b/src/common/Connection.ts
similarity index 99%
rename from src/Connection.ts
rename to src/common/Connection.ts
index a8c99fd967684..9ef4ab6ccd239 100644
--- a/src/Connection.ts
+++ b/src/common/Connection.ts
@@ -19,7 +19,7 @@ import { debug } from './Debug';
 const debugProtocolSend = debug('puppeteer:protocol:SEND ►');
 const debugProtocolReceive = debug('puppeteer:protocol:RECV ◀');
 
-import Protocol from './protocol';
+import Protocol from '../protocol';
 import { ConnectionTransport } from './ConnectionTransport';
 import { EventEmitter } from './EventEmitter';
 
diff --git a/src/ConnectionTransport.ts b/src/common/ConnectionTransport.ts
similarity index 100%
rename from src/ConnectionTransport.ts
rename to src/common/ConnectionTransport.ts
diff --git a/src/ConsoleMessage.ts b/src/common/ConsoleMessage.ts
similarity index 100%
rename from src/ConsoleMessage.ts
rename to src/common/ConsoleMessage.ts
diff --git a/src/Coverage.ts b/src/common/Coverage.ts
similarity index 99%
rename from src/Coverage.ts
rename to src/common/Coverage.ts
index 5f8bff8463076..4b2d5a046d7db 100644
--- a/src/Coverage.ts
+++ b/src/common/Coverage.ts
@@ -16,7 +16,7 @@
 
 import { assert } from './assert';
 import { helper, debugError, PuppeteerEventListener } from './helper';
-import Protocol from './protocol';
+import Protocol from '../protocol';
 import { CDPSession } from './Connection';
 
 import { EVALUATION_SCRIPT_URL } from './ExecutionContext';
diff --git a/src/DOMWorld.ts b/src/common/DOMWorld.ts
similarity index 100%
rename from src/DOMWorld.ts
rename to src/common/DOMWorld.ts
diff --git a/src/Debug.ts b/src/common/Debug.ts
similarity index 100%
rename from src/Debug.ts
rename to src/common/Debug.ts
diff --git a/src/DeviceDescriptors.ts b/src/common/DeviceDescriptors.ts
similarity index 100%
rename from src/DeviceDescriptors.ts
rename to src/common/DeviceDescriptors.ts
diff --git a/src/Dialog.ts b/src/common/Dialog.ts
similarity index 98%
rename from src/Dialog.ts
rename to src/common/Dialog.ts
index 775d10dbb1c81..7675ad4d4b0d9 100644
--- a/src/Dialog.ts
+++ b/src/common/Dialog.ts
@@ -16,7 +16,7 @@
 
 import { assert } from './assert';
 import { CDPSession } from './Connection';
-import Protocol from './protocol';
+import Protocol from '../protocol';
 
 /**
  * Dialog instances are dispatched by the {@link Page} via the `dialog` event.
diff --git a/src/EmulationManager.ts b/src/common/EmulationManager.ts
similarity index 98%
rename from src/EmulationManager.ts
rename to src/common/EmulationManager.ts
index 8ff36b4667bfe..3231aa1bc9c5e 100644
--- a/src/EmulationManager.ts
+++ b/src/common/EmulationManager.ts
@@ -15,7 +15,7 @@
  */
 import { CDPSession } from './Connection';
 import { Viewport } from './PuppeteerViewport';
-import Protocol from './protocol';
+import Protocol from '../protocol';
 
 export class EmulationManager {
   _client: CDPSession;
diff --git a/src/Errors.ts b/src/common/Errors.ts
similarity index 100%
rename from src/Errors.ts
rename to src/common/Errors.ts
diff --git a/src/EventEmitter.ts b/src/common/EventEmitter.ts
similarity index 100%
rename from src/EventEmitter.ts
rename to src/common/EventEmitter.ts
diff --git a/src/Events.ts b/src/common/Events.ts
similarity index 100%
rename from src/Events.ts
rename to src/common/Events.ts
diff --git a/src/ExecutionContext.ts b/src/common/ExecutionContext.ts
similarity index 99%
rename from src/ExecutionContext.ts
rename to src/common/ExecutionContext.ts
index 32db1a0c906a5..b653895e4e796 100644
--- a/src/ExecutionContext.ts
+++ b/src/common/ExecutionContext.ts
@@ -20,7 +20,7 @@ import { createJSHandle, JSHandle, ElementHandle } from './JSHandle';
 import { CDPSession } from './Connection';
 import { DOMWorld } from './DOMWorld';
 import { Frame } from './FrameManager';
-import Protocol from './protocol';
+import Protocol from '../protocol';
 
 export const EVALUATION_SCRIPT_URL = '__puppeteer_evaluation_script__';
 const SOURCE_URL_REGEX = /^[\040\t]*\/\/[@#] sourceURL=\s*(\S*?)\s*$/m;
diff --git a/src/FileChooser.ts b/src/common/FileChooser.ts
similarity index 97%
rename from src/FileChooser.ts
rename to src/common/FileChooser.ts
index 99a2b14281219..d23ab7c4f706b 100644
--- a/src/FileChooser.ts
+++ b/src/common/FileChooser.ts
@@ -15,7 +15,7 @@
  */
 
 import { ElementHandle } from './JSHandle';
-import Protocol from './protocol';
+import Protocol from '../protocol';
 import { assert } from './assert';
 
 export class FileChooser {
diff --git a/src/FrameManager.ts b/src/common/FrameManager.ts
similarity index 99%
rename from src/FrameManager.ts
rename to src/common/FrameManager.ts
index e50617bff208b..243c6c3da4d0d 100644
--- a/src/FrameManager.ts
+++ b/src/common/FrameManager.ts
@@ -28,7 +28,7 @@ import { JSHandle, ElementHandle } from './JSHandle';
 import { MouseButtonInput } from './Input';
 import { Page } from './Page';
 import { HTTPResponse } from './HTTPResponse';
-import Protocol from './protocol';
+import Protocol from '../protocol';
 
 const UTILITY_WORLD_NAME = '__puppeteer_utility_world__';
 
diff --git a/src/HTTPRequest.ts b/src/common/HTTPRequest.ts
similarity index 99%
rename from src/HTTPRequest.ts
rename to src/common/HTTPRequest.ts
index 7df17ee24eed8..a11250f34b02c 100644
--- a/src/HTTPRequest.ts
+++ b/src/common/HTTPRequest.ts
@@ -18,7 +18,7 @@ import { Frame } from './FrameManager';
 import { HTTPResponse } from './HTTPResponse';
 import { assert } from './assert';
 import { helper, debugError } from './helper';
-import Protocol from './protocol';
+import Protocol from '../protocol';
 
 export class HTTPRequest {
   _requestId: string;
diff --git a/src/HTTPResponse.ts b/src/common/HTTPResponse.ts
similarity index 99%
rename from src/HTTPResponse.ts
rename to src/common/HTTPResponse.ts
index b595486d83a21..a8f1ad249a512 100644
--- a/src/HTTPResponse.ts
+++ b/src/common/HTTPResponse.ts
@@ -17,7 +17,7 @@ import { CDPSession } from './Connection';
 import { Frame } from './FrameManager';
 import { HTTPRequest } from './HTTPRequest';
 import { SecurityDetails } from './SecurityDetails';
-import Protocol from './protocol';
+import Protocol from '../protocol';
 
 interface RemoteAddress {
   ip: string;
diff --git a/src/Input.ts b/src/common/Input.ts
similarity index 100%
rename from src/Input.ts
rename to src/common/Input.ts
diff --git a/src/JSHandle.ts b/src/common/JSHandle.ts
similarity index 99%
rename from src/JSHandle.ts
rename to src/common/JSHandle.ts
index 38e814eea8438..78aef76808775 100644
--- a/src/JSHandle.ts
+++ b/src/common/JSHandle.ts
@@ -22,7 +22,7 @@ import { CDPSession } from './Connection';
 import { KeyInput } from './USKeyboardLayout';
 import { FrameManager, Frame } from './FrameManager';
 import { getQueryHandlerAndSelector } from './QueryHandler';
-import Protocol from './protocol';
+import Protocol from '../protocol';
 
 interface BoxModel {
   content: Array<{ x: number; y: number }>;
diff --git a/src/LifecycleWatcher.ts b/src/common/LifecycleWatcher.ts
similarity index 100%
rename from src/LifecycleWatcher.ts
rename to src/common/LifecycleWatcher.ts
diff --git a/src/NetworkManager.ts b/src/common/NetworkManager.ts
similarity index 99%
rename from src/NetworkManager.ts
rename to src/common/NetworkManager.ts
index 46ed595ba81d9..2ed5c7a9297a8 100644
--- a/src/NetworkManager.ts
+++ b/src/common/NetworkManager.ts
@@ -16,7 +16,7 @@
 import { EventEmitter } from './EventEmitter';
 import { assert } from './assert';
 import { helper, debugError } from './helper';
-import Protocol from './protocol';
+import Protocol from '../protocol';
 import { Events } from './Events';
 import { CDPSession } from './Connection';
 import { FrameManager } from './FrameManager';
diff --git a/src/Page.ts b/src/common/Page.ts
similarity index 99%
rename from src/Page.ts
rename to src/common/Page.ts
index 79bb1d51f8da2..2e93eb01720a7 100644
--- a/src/Page.ts
+++ b/src/common/Page.ts
@@ -40,7 +40,7 @@ import { TimeoutSettings } from './TimeoutSettings';
 import { FileChooser } from './FileChooser';
 import { ConsoleMessage } from './ConsoleMessage';
 import { PuppeteerLifeCycleEvent } from './LifecycleWatcher';
-import Protocol from './protocol';
+import Protocol from '../protocol';
 
 const writeFileAsync = helper.promisify(fs.writeFile);
 
diff --git a/src/Puppeteer.ts b/src/common/Puppeteer.ts
similarity index 93%
rename from src/Puppeteer.ts
rename to src/common/Puppeteer.ts
index 44a53dfb0e3b4..0a8a0a8c6ad87 100644
--- a/src/Puppeteer.ts
+++ b/src/common/Puppeteer.ts
@@ -13,19 +13,19 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import Launcher from './node/Launcher';
+import Launcher from '../node/Launcher';
 import {
   LaunchOptions,
   ChromeArgOptions,
   BrowserOptions,
-} from './node/LaunchOptions';
-import { ProductLauncher } from './node/Launcher';
-import { BrowserFetcher, BrowserFetcherOptions } from './node/BrowserFetcher';
+} from '../node/LaunchOptions';
+import { ProductLauncher } from '../node/Launcher';
+import { BrowserFetcher, BrowserFetcherOptions } from '../node/BrowserFetcher';
 import { puppeteerErrors, PuppeteerErrors } from './Errors';
 import { ConnectionTransport } from './ConnectionTransport';
 
 import { devicesMap } from './DeviceDescriptors';
-import { DevicesMap } from './/DeviceDescriptors';
+import { DevicesMap } from './DeviceDescriptors';
 import { Browser } from './Browser';
 import {
   registerCustomQueryHandler,
@@ -102,7 +102,7 @@ export class Puppeteer {
     ) {
       // @ts-ignore
       // eslint-disable-next-line @typescript-eslint/no-var-requires
-      const packageJson = require('../package.json');
+      const packageJson = require('../../package.json');
       switch (this._productName) {
         case 'firefox':
           this._preferredRevision = packageJson.puppeteer.firefox_revision;
diff --git a/src/PuppeteerViewport.ts b/src/common/PuppeteerViewport.ts
similarity index 100%
rename from src/PuppeteerViewport.ts
rename to src/common/PuppeteerViewport.ts
diff --git a/src/QueryHandler.ts b/src/common/QueryHandler.ts
similarity index 100%
rename from src/QueryHandler.ts
rename to src/common/QueryHandler.ts
diff --git a/src/SecurityDetails.ts b/src/common/SecurityDetails.ts
similarity index 97%
rename from src/SecurityDetails.ts
rename to src/common/SecurityDetails.ts
index eb622016a4f86..b99a271eee269 100644
--- a/src/SecurityDetails.ts
+++ b/src/common/SecurityDetails.ts
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-import Protocol from './protocol';
+import Protocol from '../protocol';
 
 export class SecurityDetails {
   private _subjectName: string;
diff --git a/src/Target.ts b/src/common/Target.ts
similarity index 99%
rename from src/Target.ts
rename to src/common/Target.ts
index b4c71b19aeb7e..1578fee3701e1 100644
--- a/src/Target.ts
+++ b/src/common/Target.ts
@@ -20,7 +20,7 @@ import { WebWorker } from './WebWorker';
 import { CDPSession } from './Connection';
 import { Browser, BrowserContext } from './Browser';
 import { Viewport } from './PuppeteerViewport';
-import Protocol from './protocol';
+import Protocol from '../protocol';
 
 export class Target {
   _targetInfo: Protocol.Target.TargetInfo;
diff --git a/src/TimeoutSettings.ts b/src/common/TimeoutSettings.ts
similarity index 100%
rename from src/TimeoutSettings.ts
rename to src/common/TimeoutSettings.ts
diff --git a/src/Tracing.ts b/src/common/Tracing.ts
similarity index 100%
rename from src/Tracing.ts
rename to src/common/Tracing.ts
diff --git a/src/USKeyboardLayout.ts b/src/common/USKeyboardLayout.ts
similarity index 100%
rename from src/USKeyboardLayout.ts
rename to src/common/USKeyboardLayout.ts
diff --git a/src/WebSocketTransport.ts b/src/common/WebSocketTransport.ts
similarity index 100%
rename from src/WebSocketTransport.ts
rename to src/common/WebSocketTransport.ts
diff --git a/src/WebWorker.ts b/src/common/WebWorker.ts
similarity index 99%
rename from src/WebWorker.ts
rename to src/common/WebWorker.ts
index 9960d2e73189f..4dccdbe430197 100644
--- a/src/WebWorker.ts
+++ b/src/common/WebWorker.ts
@@ -18,7 +18,7 @@ import { debugError } from './helper';
 import { ExecutionContext } from './ExecutionContext';
 import { JSHandle } from './JSHandle';
 import { CDPSession } from './Connection';
-import Protocol from './protocol';
+import Protocol from '../protocol';
 
 type ConsoleAPICalledCallback = (
   eventType: string,
diff --git a/src/assert.ts b/src/common/assert.ts
similarity index 100%
rename from src/assert.ts
rename to src/common/assert.ts
diff --git a/src/helper.ts b/src/common/helper.ts
similarity index 99%
rename from src/helper.ts
rename to src/common/helper.ts
index bc2f58163c341..71ff4536599f4 100644
--- a/src/helper.ts
+++ b/src/common/helper.ts
@@ -18,7 +18,7 @@ import { debug } from './Debug';
 import * as fs from 'fs';
 import { CDPSession } from './Connection';
 import { promisify } from 'util';
-import Protocol from './protocol';
+import Protocol from '../protocol';
 import { CommonEventEmitter } from './EventEmitter';
 import { assert } from './assert';
 
diff --git a/src/index.ts b/src/index.ts
index 3d039eb93a1e3..a083eacbcc79e 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -19,9 +19,9 @@
 // eslint-disable-next-line @typescript-eslint/no-var-requires
 const api = require('./api');
 
-import { helper } from './helper';
-import { Page } from './Page';
-import { Puppeteer } from './Puppeteer';
+import { helper } from './common/helper';
+import { Page } from './common/Page';
+import { Puppeteer } from './common/Puppeteer';
 
 interface InitOptions {
   packageJson: {
diff --git a/src/node/BrowserFetcher.ts b/src/node/BrowserFetcher.ts
index c4002095071af..b4082a771f8fc 100644
--- a/src/node/BrowserFetcher.ts
+++ b/src/node/BrowserFetcher.ts
@@ -23,13 +23,13 @@ import * as https from 'https';
 import * as http from 'http';
 
 import extractZip from 'extract-zip';
-import { debug } from '../Debug';
+import { debug } from '../common/Debug';
 import removeRecursive from 'rimraf';
 import * as URL from 'url';
 import ProxyAgent from 'https-proxy-agent';
 import { getProxyForUrl } from 'proxy-from-env';
-import { assert } from '../assert';
-import { helper } from '../helper';
+import { assert } from '../common/assert';
+import { helper } from '../common/helper';
 const debugFetcher = debug(`puppeteer:fetcher`);
 
 const downloadURLs = {
diff --git a/src/node/BrowserRunner.ts b/src/node/BrowserRunner.ts
index baf5f61dde9d7..6a2e921107f7d 100644
--- a/src/node/BrowserRunner.ts
+++ b/src/node/BrowserRunner.ts
@@ -14,18 +14,18 @@
  * limitations under the License.
  */
 
-import { debug } from '../Debug';
+import { debug } from '../common/Debug';
 
 import removeFolder from 'rimraf';
 import * as childProcess from 'child_process';
-import { assert } from '../assert';
-import { helper, debugError } from '../helper';
+import { assert } from '../common/assert';
+import { helper, debugError } from '../common/helper';
 import { LaunchOptions } from './LaunchOptions';
-import { Connection } from '../Connection';
-import { WebSocketTransport } from '../WebSocketTransport';
+import { Connection } from '../common/Connection';
+import { WebSocketTransport } from '../common/WebSocketTransport';
 import { PipeTransport } from './PipeTransport';
 import * as readline from 'readline';
-import { TimeoutError } from '../Errors';
+import { TimeoutError } from '../common/Errors';
 
 const removeFolderAsync = helper.promisify(removeFolder);
 const debugLauncher = debug('puppeteer:launcher');
diff --git a/src/node/LaunchOptions.ts b/src/node/LaunchOptions.ts
index 9e5e537baa21c..81548c9c26ed0 100644
--- a/src/node/LaunchOptions.ts
+++ b/src/node/LaunchOptions.ts
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-import { Viewport } from '../PuppeteerViewport';
+import { Viewport } from '../common/PuppeteerViewport';
 
 export interface ChromeArgOptions {
   headless?: boolean;
diff --git a/src/node/Launcher.ts b/src/node/Launcher.ts
index 63409ed381753..d95d6b0fc2413 100644
--- a/src/node/Launcher.ts
+++ b/src/node/Launcher.ts
@@ -21,12 +21,12 @@ import * as URL from 'url';
 import * as fs from 'fs';
 
 import { BrowserFetcher } from './BrowserFetcher';
-import { Connection } from '../Connection';
-import { Browser } from '../Browser';
-import { assert } from '../assert';
-import { helper, debugError } from '../helper';
-import { ConnectionTransport } from '../ConnectionTransport';
-import { WebSocketTransport } from '../WebSocketTransport';
+import { Connection } from '../common/Connection';
+import { Browser } from '../common/Browser';
+import { assert } from '../common/assert';
+import { helper, debugError } from '../common/helper';
+import { ConnectionTransport } from '../common/ConnectionTransport';
+import { WebSocketTransport } from '../common/WebSocketTransport';
 import { BrowserRunner } from './BrowserRunner';
 
 const mkdtempAsync = helper.promisify(fs.mkdtemp);
diff --git a/src/node/PipeTransport.ts b/src/node/PipeTransport.ts
index 52b2a0f1d46b2..9711e23ea84b8 100644
--- a/src/node/PipeTransport.ts
+++ b/src/node/PipeTransport.ts
@@ -13,8 +13,8 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import { helper, debugError, PuppeteerEventListener } from '../helper';
-import { ConnectionTransport } from '../ConnectionTransport';
+import { helper, debugError, PuppeteerEventListener } from '../common/helper';
+import { ConnectionTransport } from '../common/ConnectionTransport';
 
 export class PipeTransport implements ConnectionTransport {
   _pipeWrite: NodeJS.WritableStream;
diff --git a/test/EventEmitter.spec.js b/test/EventEmitter.spec.js
index 446e6db1e86e8..b6fcc91952433 100644
--- a/test/EventEmitter.spec.js
+++ b/test/EventEmitter.spec.js
@@ -1,4 +1,4 @@
-const { EventEmitter } = require('../lib/EventEmitter');
+const { EventEmitter } = require('../lib/common/EventEmitter');
 const sinon = require('sinon');
 const expect = require('expect');
 
diff --git a/test/coverage-utils.js b/test/coverage-utils.js
index 221aaaef4cfbb..cff80d7e1d3a5 100644
--- a/test/coverage-utils.js
+++ b/test/coverage-utils.js
@@ -104,7 +104,7 @@ const trackCoverage = () => {
 
   before(() => {
     const api = require('../lib/api');
-    const events = require('../lib/Events');
+    const events = require('../lib/common/Events');
     for (const [className, classType] of Object.entries(api))
       traceAPICoverage(coverageMap, events, className, classType);
   });
diff --git a/test/launcher.spec.js b/test/launcher.spec.js
index 960d1e6ba7b79..7c031f5c9fa4b 100644
--- a/test/launcher.spec.js
+++ b/test/launcher.spec.js
@@ -17,7 +17,7 @@ const fs = require('fs');
 const os = require('os');
 const path = require('path');
 const sinon = require('sinon');
-const { helper } = require('../lib/helper');
+const { helper } = require('../lib/common/helper');
 const rmAsync = helper.promisify(require('rimraf'));
 const mkdtempAsync = helper.promisify(fs.mkdtemp);
 const readFileAsync = helper.promisify(fs.readFile);
diff --git a/utils/doclint/cli.js b/utils/doclint/cli.js
index dc214eb4f69fd..51387b5a494d9 100755
--- a/utils/doclint/cli.js
+++ b/utils/doclint/cli.js
@@ -61,6 +61,7 @@ async function run() {
      * we'll just list the directories manually.
      */
     ...(await Source.readdir(path.join(PROJECT_DIR, 'src'), 'ts')),
+    ...(await Source.readdir(path.join(PROJECT_DIR, 'src', 'common'), 'ts')),
     ...(await Source.readdir(path.join(PROJECT_DIR, 'src', 'node'), 'ts')),
   ];
 
@@ -68,7 +69,11 @@ async function run() {
     (source) => !source.filePath().endsWith('.d.ts')
   );
 
-  const jsSources = await Source.readdir(path.join(PROJECT_DIR, 'lib'));
+  const jsSources = [
+    ...(await Source.readdir(path.join(PROJECT_DIR, 'lib'))),
+    ...(await Source.readdir(path.join(PROJECT_DIR, 'lib', 'common'))),
+    ...(await Source.readdir(path.join(PROJECT_DIR, 'lib', 'node'))),
+  ];
   const allSrcCode = [...jsSources, ...tsSourcesNoDefinitions];
   messages.push(...(await checkPublicAPI(page, mdSources, allSrcCode)));