diff --git a/src/browser.ts b/src/browser.ts
index c2ca643607..c86e7a8c94 100644
--- a/src/browser.ts
+++ b/src/browser.ts
@@ -15,7 +15,7 @@
  */
 
 import * as types from './types';
-import { BrowserContext, BrowserContextBase } from './browserContext';
+import { BrowserContext } from './browserContext';
 import { Page } from './page';
 import { EventEmitter } from 'events';
 import { Download } from './download';
@@ -39,19 +39,10 @@ export type BrowserOptions = types.UIOptions & {
   proxy?: ProxySettings,
 };
 
-export interface Browser extends EventEmitter {
-  newContext(options?: types.BrowserContextOptions): Promise<BrowserContext>;
-  contexts(): BrowserContext[];
-  newPage(options?: types.BrowserContextOptions): Promise<Page>;
-  isConnected(): boolean;
-  close(): Promise<void>;
-  version(): string;
-}
-
-export abstract class BrowserBase extends EventEmitter implements Browser {
+export abstract class Browser extends EventEmitter {
   readonly _options: BrowserOptions;
   private _downloads = new Map<string, Download>();
-  _defaultContext: BrowserContextBase | null = null;
+  _defaultContext: BrowserContext | null = null;
   private _startedClosing = false;
 
   constructor(options: BrowserOptions) {
@@ -93,7 +84,7 @@ export abstract class BrowserBase extends EventEmitter implements Browser {
 
   _didClose() {
     for (const context of this.contexts())
-      (context as BrowserContextBase)._browserClosed();
+      context._browserClosed();
     if (this._defaultContext)
       this._defaultContext._browserClosed();
     this.emit(Events.Browser.Disconnected);
diff --git a/src/browserContext.ts b/src/browserContext.ts
index 57f9b9377f..f5880abaa3 100644
--- a/src/browserContext.ts
+++ b/src/browserContext.ts
@@ -23,32 +23,12 @@ import * as frames from './frames';
 import * as types from './types';
 import { Events } from './events';
 import { Download } from './download';
-import { BrowserBase } from './browser';
+import { Browser } from './browser';
 import { EventEmitter } from 'events';
 import { Progress } from './progress';
 import { DebugController } from './debug/debugController';
 
-export interface BrowserContext extends EventEmitter {
-  setDefaultNavigationTimeout(timeout: number): void;
-  setDefaultTimeout(timeout: number): void;
-  pages(): Page[];
-  newPage(): Promise<Page>;
-  cookies(urls?: string | string[]): Promise<types.NetworkCookie[]>;
-  addCookies(cookies: types.SetNetworkCookieParam[]): Promise<void>;
-  clearCookies(): Promise<void>;
-  grantPermissions(permissions: string[], options?: { origin?: string }): Promise<void>;
-  clearPermissions(): Promise<void>;
-  setGeolocation(geolocation?: types.Geolocation): Promise<void>;
-  setExtraHTTPHeaders(headers: types.HeadersArray): Promise<void>;
-  setOffline(offline: boolean): Promise<void>;
-  setHTTPCredentials(httpCredentials?: types.Credentials): Promise<void>;
-  addInitScript(script: Function | string | { path?: string, content?: string }, arg?: any): Promise<void>;
-  exposeBinding(name: string, playwrightBinding: frames.FunctionWithSource): Promise<void>;
-  _setRequestInterceptor(handler: network.RouteHandler | undefined): Promise<void>;
-  close(): Promise<void>;
-}
-
-export abstract class BrowserContextBase extends EventEmitter implements BrowserContext {
+export abstract class BrowserContext extends EventEmitter {
   readonly _timeoutSettings = new TimeoutSettings();
   readonly _pageBindings = new Map<string, PageBinding>();
   readonly _options: types.BrowserContextOptions;
@@ -59,11 +39,11 @@ export abstract class BrowserContextBase extends EventEmitter implements Browser
   private _closePromiseFulfill: ((error: Error) => void) | undefined;
   readonly _permissions = new Map<string, string[]>();
   readonly _downloads = new Set<Download>();
-  readonly _browserBase: BrowserBase;
+  readonly _browser: Browser;
 
-  constructor(browserBase: BrowserBase, options: types.BrowserContextOptions, isPersistentContext: boolean) {
+  constructor(browser: Browser, options: types.BrowserContextOptions, isPersistentContext: boolean) {
     super();
-    this._browserBase = browserBase;
+    this._browser = browser;
     this._options = options;
     this._isPersistentContext = isPersistentContext;
     this._closePromise = new Promise(fulfill => this._closePromiseFulfill = fulfill);
@@ -183,7 +163,7 @@ export abstract class BrowserContextBase extends EventEmitter implements Browser
   }
 
   protected _authenticateProxyViaHeader() {
-    const proxy = this._browserBase._options.proxy || { username: undefined, password: undefined };
+    const proxy = this._browser._options.proxy || { username: undefined, password: undefined };
     const { username, password } = proxy;
     if (username) {
       this._options.httpCredentials = { username, password: password! };
@@ -196,7 +176,7 @@ export abstract class BrowserContextBase extends EventEmitter implements Browser
   }
 
   protected _authenticateProxyViaCredentials() {
-    const proxy = this._browserBase._options.proxy;
+    const proxy = this._browser._options.proxy;
     if (!proxy)
       return;
     const { username, password } = proxy;
@@ -213,7 +193,7 @@ export abstract class BrowserContextBase extends EventEmitter implements Browser
     if (this._isPersistentContext) {
       // Default context is only created in 'persistent' mode and closing it should close
       // the browser.
-      await this._browserBase.close();
+      await this._browser.close();
       return;
     }
     if (this._closedStatus === 'open') {
@@ -226,7 +206,7 @@ export abstract class BrowserContextBase extends EventEmitter implements Browser
   }
 }
 
-export function assertBrowserContextIsNotOwned(context: BrowserContextBase) {
+export function assertBrowserContextIsNotOwned(context: BrowserContext) {
   for (const page of context.pages()) {
     if (page._ownedContext)
       throw new Error('Please use browser.newContext() for multi-page scripts that share the context.');
diff --git a/src/chromium/crBrowser.ts b/src/chromium/crBrowser.ts
index 6342b77e56..e5e05e225f 100644
--- a/src/chromium/crBrowser.ts
+++ b/src/chromium/crBrowser.ts
@@ -15,8 +15,8 @@
  * limitations under the License.
  */
 
-import { BrowserBase, BrowserOptions } from '../browser';
-import { assertBrowserContextIsNotOwned, BrowserContext, BrowserContextBase, validateBrowserContextOptions, verifyGeolocation } from '../browserContext';
+import { Browser, BrowserOptions } from '../browser';
+import { assertBrowserContextIsNotOwned, BrowserContext, validateBrowserContextOptions, verifyGeolocation } from '../browserContext';
 import { Events as CommonEvents } from '../events';
 import { assert } from '../helper';
 import * as network from '../network';
@@ -31,7 +31,7 @@ import { Protocol } from './protocol';
 import { CRExecutionContext } from './crExecutionContext';
 import { CRDevTools } from './crDevTools';
 
-export class CRBrowser extends BrowserBase {
+export class CRBrowser extends Browser {
   readonly _connection: CRConnection;
   _session: CRSession;
   private _clientRootSessionPromise: Promise<CRSession> | null = null;
@@ -279,7 +279,7 @@ class CRServiceWorker extends Worker {
   }
 }
 
-export class CRBrowserContext extends BrowserContextBase {
+export class CRBrowserContext extends BrowserContext {
   readonly _browser: CRBrowser;
   readonly _browserContextId: string | null;
   readonly _evaluateOnNewDocumentSources: string[];
diff --git a/src/debug/debugController.ts b/src/debug/debugController.ts
index d3b8317e02..7fb26f8af0 100644
--- a/src/debug/debugController.ts
+++ b/src/debug/debugController.ts
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-import { BrowserContextBase } from '../browserContext';
+import { BrowserContext } from '../browserContext';
 import { Events } from '../events';
 import * as frames from '../frames';
 import * as js from '../javascript';
@@ -22,7 +22,7 @@ import { Page } from '../page';
 import DebugScript from './injected/debugScript';
 
 export class DebugController {
-  constructor(context: BrowserContextBase) {
+  constructor(context: BrowserContext) {
     context.on(Events.BrowserContext.Page, (page: Page) => {
       for (const frame of page.frames())
         this.ensureInstalledInFrame(frame);
diff --git a/src/firefox/ffBrowser.ts b/src/firefox/ffBrowser.ts
index 63fd490afc..0837e50022 100644
--- a/src/firefox/ffBrowser.ts
+++ b/src/firefox/ffBrowser.ts
@@ -15,8 +15,8 @@
  * limitations under the License.
  */
 
-import { BrowserBase, BrowserOptions } from '../browser';
-import { assertBrowserContextIsNotOwned, BrowserContext, BrowserContextBase, validateBrowserContextOptions, verifyGeolocation } from '../browserContext';
+import { Browser, BrowserOptions } from '../browser';
+import { assertBrowserContextIsNotOwned, BrowserContext, validateBrowserContextOptions, verifyGeolocation } from '../browserContext';
 import { Events } from '../events';
 import { assert, helper, RegisteredListener } from '../helper';
 import * as network from '../network';
@@ -27,7 +27,7 @@ import { ConnectionEvents, FFConnection } from './ffConnection';
 import { FFPage } from './ffPage';
 import { Protocol } from './protocol';
 
-export class FFBrowser extends BrowserBase {
+export class FFBrowser extends Browser {
   _connection: FFConnection;
   readonly _ffPages: Map<string, FFPage>;
   readonly _contexts: Map<string, FFBrowserContext>;
@@ -163,7 +163,7 @@ export class FFBrowser extends BrowserBase {
   }
 }
 
-export class FFBrowserContext extends BrowserContextBase {
+export class FFBrowserContext extends BrowserContext {
   readonly _browser: FFBrowser;
   readonly _browserContextId: string | null;
 
diff --git a/src/page.ts b/src/page.ts
index f4ec5b7610..d0c81ffc5f 100644
--- a/src/page.ts
+++ b/src/page.ts
@@ -25,7 +25,7 @@ import { Screenshotter } from './screenshotter';
 import { TimeoutSettings } from './timeoutSettings';
 import * as types from './types';
 import { Events } from './events';
-import { BrowserContext, BrowserContextBase } from './browserContext';
+import { BrowserContext } from './browserContext';
 import { ConsoleMessage } from './console';
 import * as accessibility from './accessibility';
 import { EventEmitter } from 'events';
@@ -99,7 +99,7 @@ export class Page extends EventEmitter {
   readonly _disconnectedPromise: Promise<Error>;
   private _crashedCallback: (e: Error) => void;
   readonly _crashedPromise: Promise<Error>;
-  readonly _browserContext: BrowserContextBase;
+  readonly _browserContext: BrowserContext;
   readonly keyboard: input.Keyboard;
   readonly mouse: input.Mouse;
   readonly _timeoutSettings: TimeoutSettings;
@@ -116,7 +116,7 @@ export class Page extends EventEmitter {
   private _requestInterceptor?: network.RouteHandler;
   _ownedContext: BrowserContext | undefined;
 
-  constructor(delegate: PageDelegate, browserContext: BrowserContextBase) {
+  constructor(delegate: PageDelegate, browserContext: BrowserContext) {
     super();
     this._delegate = delegate;
     this._closedCallback = () => {};
@@ -144,7 +144,7 @@ export class Page extends EventEmitter {
   }
 
   async _doSlowMo() {
-    const slowMo = this._browserContext._browserBase._options.slowMo;
+    const slowMo = this._browserContext._browser._options.slowMo;
     if (!slowMo)
       return;
     await new Promise(x => setTimeout(x, slowMo));
diff --git a/src/rpc/browserServerImpl.ts b/src/rpc/browserServerImpl.ts
index 5ba7f92aee..9214648999 100644
--- a/src/rpc/browserServerImpl.ts
+++ b/src/rpc/browserServerImpl.ts
@@ -18,7 +18,7 @@ import { LaunchServerOptions } from './client/types';
 import { BrowserTypeBase } from '../server/browserType';
 import * as ws from 'ws';
 import { helper } from '../helper';
-import { BrowserBase } from '../browser';
+import { Browser } from '../browser';
 import { ChildProcess } from 'child_process';
 import { EventEmitter } from 'ws';
 import { DispatcherScope, DispatcherConnection } from './server/dispatcher';
@@ -43,18 +43,18 @@ export class BrowserServerLauncherImpl implements BrowserServerLauncher {
       ignoreAllDefaultArgs: !!options.ignoreDefaultArgs && !Array.isArray(options.ignoreDefaultArgs),
       env: options.env ? envObjectToArray(options.env) : undefined,
     });
-    return new BrowserServerImpl(this._browserType, browser as BrowserBase, options.port);
+    return new BrowserServerImpl(this._browserType, browser, options.port);
   }
 }
 
 export class BrowserServerImpl extends EventEmitter implements BrowserServer {
   private _server: ws.Server;
   private _browserType: BrowserTypeBase;
-  private _browser: BrowserBase;
+  private _browser: Browser;
   private _wsEndpoint: string;
   private _process: ChildProcess;
 
-  constructor(browserType: BrowserTypeBase, browser: BrowserBase, port: number = 0) {
+  constructor(browserType: BrowserTypeBase, browser: Browser, port: number = 0) {
     super();
 
     this._browserType = browserType;
@@ -121,7 +121,7 @@ class ConnectedBrowser extends BrowserDispatcher {
   private _contexts: BrowserContextDispatcher[] = [];
   _closed = false;
 
-  constructor(scope: DispatcherScope, browser: BrowserBase) {
+  constructor(scope: DispatcherScope, browser: Browser) {
     super(scope, browser, 'connectedBrowser');
   }
 
diff --git a/src/rpc/server/browserContextDispatcher.ts b/src/rpc/server/browserContextDispatcher.ts
index 64845cac5b..12a464c35f 100644
--- a/src/rpc/server/browserContextDispatcher.ts
+++ b/src/rpc/server/browserContextDispatcher.ts
@@ -15,7 +15,7 @@
  */
 
 import * as types from '../../types';
-import { BrowserContextBase, BrowserContext } from '../../browserContext';
+import { BrowserContext } from '../../browserContext';
 import { Events } from '../../events';
 import { Dispatcher, DispatcherScope, lookupDispatcher } from './dispatcher';
 import { PageDispatcher, BindingCallDispatcher, WorkerDispatcher } from './pageDispatcher';
@@ -26,9 +26,9 @@ import { CDPSessionDispatcher } from './cdpSessionDispatcher';
 import { Events as ChromiumEvents } from '../../chromium/events';
 
 export class BrowserContextDispatcher extends Dispatcher<BrowserContext, BrowserContextInitializer> implements BrowserContextChannel {
-  private _context: BrowserContextBase;
+  private _context: BrowserContext;
 
-  constructor(scope: DispatcherScope, context: BrowserContextBase) {
+  constructor(scope: DispatcherScope, context: BrowserContext) {
     super(scope, context, 'BrowserContext', {}, true);
     this._context = context;
 
@@ -40,7 +40,7 @@ export class BrowserContextDispatcher extends Dispatcher<BrowserContext, Browser
       this._dispose();
     });
 
-    if (context._browserBase._options.name === 'chromium') {
+    if (context._browser._options.name === 'chromium') {
       for (const page of (context as CRBrowserContext).backgroundPages())
         this._dispatchEvent('crBackgroundPage', { page: new PageDispatcher(this._scope, page) });
       context.on(ChromiumEvents.ChromiumBrowserContext.BackgroundPage, page => this._dispatchEvent('crBackgroundPage', { page: new PageDispatcher(this._scope, page) }));
diff --git a/src/rpc/server/browserDispatcher.ts b/src/rpc/server/browserDispatcher.ts
index c664a99b59..1c045b1092 100644
--- a/src/rpc/server/browserDispatcher.ts
+++ b/src/rpc/server/browserDispatcher.ts
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-import { Browser, BrowserBase } from '../../browser';
-import { BrowserContextBase } from '../../browserContext';
+import { Browser } from '../../browser';
 import { Events } from '../../events';
 import { BrowserChannel, BrowserContextChannel, BrowserInitializer, CDPSessionChannel, Binary, BrowserNewContextParams } from '../channels';
 import { BrowserContextDispatcher } from './browserContextDispatcher';
@@ -25,7 +24,7 @@ import { CRBrowser } from '../../chromium/crBrowser';
 import { PageDispatcher } from './pageDispatcher';
 
 export class BrowserDispatcher extends Dispatcher<Browser, BrowserInitializer> implements BrowserChannel {
-  constructor(scope: DispatcherScope, browser: BrowserBase, guid?: string) {
+  constructor(scope: DispatcherScope, browser: Browser, guid?: string) {
     super(scope, browser, 'Browser', { version: browser.version() }, true, guid);
     browser.on(Events.Browser.Disconnected, () => this._didClose());
   }
@@ -36,7 +35,7 @@ export class BrowserDispatcher extends Dispatcher<Browser, BrowserInitializer> i
   }
 
   async newContext(params: BrowserNewContextParams): Promise<{ context: BrowserContextChannel }> {
-    return { context: new BrowserContextDispatcher(this._scope, await this._object.newContext(params) as BrowserContextBase) };
+    return { context: new BrowserContextDispatcher(this._scope, await this._object.newContext(params)) };
   }
 
   async close(): Promise<void> {
diff --git a/src/rpc/server/browserTypeDispatcher.ts b/src/rpc/server/browserTypeDispatcher.ts
index 87b08a3d63..7a9fd61eaa 100644
--- a/src/rpc/server/browserTypeDispatcher.ts
+++ b/src/rpc/server/browserTypeDispatcher.ts
@@ -14,12 +14,10 @@
  * limitations under the License.
  */
 
-import { BrowserBase } from '../../browser';
 import { BrowserTypeBase, BrowserType } from '../../server/browserType';
 import { BrowserDispatcher } from './browserDispatcher';
 import { BrowserChannel, BrowserTypeChannel, BrowserContextChannel, BrowserTypeInitializer, BrowserTypeLaunchParams, BrowserTypeLaunchPersistentContextParams } from '../channels';
 import { Dispatcher, DispatcherScope } from './dispatcher';
-import { BrowserContextBase } from '../../browserContext';
 import { BrowserContextDispatcher } from './browserContextDispatcher';
 
 export class BrowserTypeDispatcher extends Dispatcher<BrowserType, BrowserTypeInitializer> implements BrowserTypeChannel {
@@ -32,11 +30,11 @@ export class BrowserTypeDispatcher extends Dispatcher<BrowserType, BrowserTypeIn
 
   async launch(params: BrowserTypeLaunchParams): Promise<{ browser: BrowserChannel }> {
     const browser = await this._object.launch(params);
-    return { browser: new BrowserDispatcher(this._scope, browser as BrowserBase) };
+    return { browser: new BrowserDispatcher(this._scope, browser) };
   }
 
   async launchPersistentContext(params: BrowserTypeLaunchPersistentContextParams): Promise<{ context: BrowserContextChannel }> {
     const browserContext = await this._object.launchPersistentContext(params.userDataDir, params);
-    return { context: new BrowserContextDispatcher(this._scope, browserContext as BrowserContextBase) };
+    return { context: new BrowserContextDispatcher(this._scope, browserContext) };
   }
 }
diff --git a/src/rpc/server/electronDispatcher.ts b/src/rpc/server/electronDispatcher.ts
index b50bdfff4a..5a5d9ee0fb 100644
--- a/src/rpc/server/electronDispatcher.ts
+++ b/src/rpc/server/electronDispatcher.ts
@@ -18,7 +18,6 @@ import { Dispatcher, DispatcherScope, lookupDispatcher } from './dispatcher';
 import { Electron, ElectronApplication, ElectronEvents, ElectronPage } from '../../server/electron';
 import { ElectronApplicationChannel, ElectronApplicationInitializer, PageChannel, JSHandleChannel, ElectronInitializer, ElectronChannel, SerializedArgument, ElectronLaunchParams, SerializedValue } from '../channels';
 import { BrowserContextDispatcher } from './browserContextDispatcher';
-import { BrowserContextBase } from '../../browserContext';
 import { PageDispatcher } from './pageDispatcher';
 import { parseArgument, serializeResult } from './jsHandleDispatcher';
 import { createHandle } from './elementHandlerDispatcher';
@@ -37,7 +36,7 @@ export class ElectronDispatcher extends Dispatcher<Electron, ElectronInitializer
 export class ElectronApplicationDispatcher extends Dispatcher<ElectronApplication, ElectronApplicationInitializer> implements ElectronApplicationChannel {
   constructor(scope: DispatcherScope, electronApplication: ElectronApplication) {
     super(scope, electronApplication, 'ElectronApplication', {}, true);
-    this._dispatchEvent('context', { context: new BrowserContextDispatcher(this._scope, electronApplication.context() as BrowserContextBase) });
+    this._dispatchEvent('context', { context: new BrowserContextDispatcher(this._scope, electronApplication.context()) });
     electronApplication.on(ElectronEvents.ElectronApplication.Close, () => {
       this._dispatchEvent('close');
       this._dispose();
diff --git a/src/server/browserType.ts b/src/server/browserType.ts
index 091a242dcd..20f1a1d747 100644
--- a/src/server/browserType.ts
+++ b/src/server/browserType.ts
@@ -21,7 +21,7 @@ import * as util from 'util';
 import { BrowserContext, verifyProxySettings, validateBrowserContextOptions } from '../browserContext';
 import * as browserPaths from '../install/browserPaths';
 import { ConnectionTransport, WebSocketTransport } from '../transport';
-import { BrowserBase, BrowserOptions, Browser, BrowserProcess } from '../browser';
+import { BrowserOptions, Browser, BrowserProcess } from '../browser';
 import { assert, helper } from '../helper';
 import { launchProcess, Env, waitForLine, envArrayToObject } from './processLauncher';
 import { PipeTransport } from './pipeTransport';
@@ -87,7 +87,7 @@ export abstract class BrowserTypeBase implements BrowserType {
     return browser._defaultContext!;
   }
 
-  async _innerLaunch(progress: Progress, options: types.LaunchOptions, persistent: types.BrowserContextOptions | undefined, userDataDir?: string): Promise<BrowserBase> {
+  async _innerLaunch(progress: Progress, options: types.LaunchOptions, persistent: types.BrowserContextOptions | undefined, userDataDir?: string): Promise<Browser> {
     options.proxy = options.proxy ? verifyProxySettings(options.proxy) : undefined;
     const { browserProcess, downloadsPath, transport } = await this._launchProcess(progress, options, !!persistent, userDataDir);
     if ((options as any).__testHookBeforeCreateBrowser)
@@ -208,7 +208,7 @@ export abstract class BrowserTypeBase implements BrowserType {
   }
 
   abstract _defaultArgs(options: types.LaunchOptions, isPersistent: boolean, userDataDir: string): string[];
-  abstract _connectToTransport(transport: ConnectionTransport, options: BrowserOptions): Promise<BrowserBase>;
+  abstract _connectToTransport(transport: ConnectionTransport, options: BrowserOptions): Promise<Browser>;
   abstract _amendEnvironment(env: Env, userDataDir: string, executable: string, browserArguments: string[]): Env;
   abstract _amendArguments(browserArguments: string[]): string[];
   abstract _rewriteStartupError(error: Error): Error;
diff --git a/src/webkit/wkBrowser.ts b/src/webkit/wkBrowser.ts
index 24a991f6d5..73b130b489 100644
--- a/src/webkit/wkBrowser.ts
+++ b/src/webkit/wkBrowser.ts
@@ -15,8 +15,8 @@
  * limitations under the License.
  */
 
-import { BrowserBase, BrowserOptions } from '../browser';
-import { assertBrowserContextIsNotOwned, BrowserContext, BrowserContextBase, validateBrowserContextOptions, verifyGeolocation } from '../browserContext';
+import { Browser, BrowserOptions } from '../browser';
+import { assertBrowserContextIsNotOwned, BrowserContext, validateBrowserContextOptions, verifyGeolocation } from '../browserContext';
 import { Events } from '../events';
 import { helper, RegisteredListener, assert } from '../helper';
 import * as network from '../network';
@@ -30,7 +30,7 @@ import { WKPage } from './wkPage';
 const DEFAULT_USER_AGENT = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0 Safari/605.1.15';
 const BROWSER_VERSION = '14.0';
 
-export class WKBrowser extends BrowserBase {
+export class WKBrowser extends Browser {
   private readonly _connection: WKConnection;
   readonly _browserSession: WKSession;
   readonly _contexts = new Map<string, WKBrowserContext>();
@@ -195,7 +195,7 @@ export class WKBrowser extends BrowserBase {
   }
 }
 
-export class WKBrowserContext extends BrowserContextBase {
+export class WKBrowserContext extends BrowserContext {
   readonly _browser: WKBrowser;
   readonly _browserContextId: string | undefined;
   readonly _evaluateOnNewDocumentSources: string[];