diff --git a/src/chromium/ExecutionContext.ts b/src/chromium/ExecutionContext.ts
index 37d5ee6d3d..5dc847ca8a 100644
--- a/src/chromium/ExecutionContext.ts
+++ b/src/chromium/ExecutionContext.ts
@@ -20,16 +20,15 @@ import { helper } from '../helper';
 import { valueFromRemoteObject, getExceptionMessage, releaseObject } from './protocolHelper';
 import { createJSHandle, ElementHandle } from './JSHandle';
 import { Protocol } from './protocol';
-import { Response } from './NetworkManager';
 import * as js from '../javascript';
 
 export const EVALUATION_SCRIPT_URL = '__playwright_evaluation_script__';
 const SOURCE_URL_REGEX = /^[\040\t]*\/\/[@#] sourceURL=\s*(\S*?)\s*$/m;
 
-export type ExecutionContext = js.ExecutionContext<ElementHandle, Response>;
-export type JSHandle = js.JSHandle<ElementHandle, Response>;
+export type ExecutionContext = js.ExecutionContext<ElementHandle>;
+export type JSHandle = js.JSHandle<ElementHandle>;
 
-export class ExecutionContextDelegate implements js.ExecutionContextDelegate<ElementHandle, Response> {
+export class ExecutionContextDelegate implements js.ExecutionContextDelegate<ElementHandle> {
   _client: CDPSession;
   _contextId: number;
 
diff --git a/src/chromium/FrameManager.ts b/src/chromium/FrameManager.ts
index 906a793c09..ebfe4014af 100644
--- a/src/chromium/FrameManager.ts
+++ b/src/chromium/FrameManager.ts
@@ -45,9 +45,9 @@ type FrameData = {
   lifecycleEvents: Set<string>,
 };
 
-export type Frame = frames.Frame<ElementHandle, Response>;
+export type Frame = frames.Frame<ElementHandle>;
 
-export class FrameManager extends EventEmitter implements frames.FrameDelegate<ElementHandle, Response> {
+export class FrameManager extends EventEmitter implements frames.FrameDelegate<ElementHandle> {
   _client: CDPSession;
   private _page: Page;
   private _networkManager: NetworkManager;
diff --git a/src/chromium/JSHandle.ts b/src/chromium/JSHandle.ts
index e419e375c8..e89321975b 100644
--- a/src/chromium/JSHandle.ts
+++ b/src/chromium/JSHandle.ts
@@ -26,7 +26,6 @@ import { FrameManager } from './FrameManager';
 import { Page } from './Page';
 import { Protocol } from './protocol';
 import { JSHandle, ExecutionContext, ExecutionContextDelegate, markJSHandle } from './ExecutionContext';
-import { Response } from './NetworkManager';
 
 type SelectorRoot = Element | ShadowRoot | Document;
 
@@ -47,7 +46,7 @@ export function createJSHandle(context: ExecutionContext, remoteObject: Protocol
   return handle;
 }
 
-export class ElementHandle extends js.JSHandle<ElementHandle, Response> {
+export class ElementHandle extends js.JSHandle<ElementHandle> {
   private _client: CDPSession;
   private _remoteObject: Protocol.Runtime.RemoteObject;
   private _page: Page;
diff --git a/src/chromium/NetworkManager.ts b/src/chromium/NetworkManager.ts
index 347310a655..09deddea42 100644
--- a/src/chromium/NetworkManager.ts
+++ b/src/chromium/NetworkManager.ts
@@ -21,6 +21,8 @@ import { Frame } from './FrameManager';
 import { FrameManager } from './FrameManager';
 import { assert, debugError, helper } from '../helper';
 import { Protocol } from './protocol';
+import * as network from '../network';
+import { ElementHandle } from './JSHandle';
 
 export const NetworkManagerEvents = {
   Request: Symbol('Events.NetworkManager.Request'),
@@ -29,13 +31,16 @@ export const NetworkManagerEvents = {
   RequestFinished: Symbol('Events.NetworkManager.RequestFinished'),
 };
 
+export type Request = network.Request<ElementHandle>;
+export type Response = network.Response<ElementHandle>;
+
 export class NetworkManager extends EventEmitter {
   private _client: CDPSession;
   private _ignoreHTTPSErrors: boolean;
   private _frameManager: FrameManager;
-  private _requestIdToRequest = new Map<string, Request>();
+  private _requestIdToRequest = new Map<string, InterceptableRequest>();
   private _requestIdToRequestWillBeSentEvent = new Map<string, Protocol.Network.requestWillBeSentPayload>();
-  private _extraHTTPHeaders: {[key: string]: string} = {};
+  private _extraHTTPHeaders: network.Headers = {};
   private _offline = false;
   private _credentials: {username: string, password: string} | null = null;
   private _attemptedAuthentications = new Set<string>();
@@ -69,7 +74,7 @@ export class NetworkManager extends EventEmitter {
     await this._updateProtocolRequestInterception();
   }
 
-  async setExtraHTTPHeaders(extraHTTPHeaders: { [s: string]: string; }) {
+  async setExtraHTTPHeaders(extraHTTPHeaders: network.Headers) {
     this._extraHTTPHeaders = {};
     for (const key of Object.keys(extraHTTPHeaders)) {
       const value = extraHTTPHeaders[key];
@@ -79,7 +84,7 @@ export class NetworkManager extends EventEmitter {
     await this._client.send('Network.setExtraHTTPHeaders', { headers: this._extraHTTPHeaders });
   }
 
-  extraHTTPHeaders(): { [s: string]: string; } {
+  extraHTTPHeaders(): network.Headers {
     return Object.assign({}, this._extraHTTPHeaders);
   }
 
@@ -187,31 +192,38 @@ export class NetworkManager extends EventEmitter {
   }
 
   _onRequest(event: Protocol.Network.requestWillBeSentPayload, interceptionId: string | null) {
-    let redirectChain = [];
+    let redirectChain: Request[] = [];
     if (event.redirectResponse) {
       const request = this._requestIdToRequest.get(event.requestId);
       // If we connect late to the target, we could have missed the requestWillBeSent event.
       if (request) {
         this._handleRequestRedirect(request, event.redirectResponse);
-        redirectChain = request._redirectChain;
+        redirectChain = request.request._redirectChain;
       }
     }
     const frame = event.frameId ? this._frameManager.frame(event.frameId) : null;
-    const request = new Request(this._client, frame, interceptionId, this._userRequestInterceptionEnabled, event, redirectChain);
+    const request = new InterceptableRequest(this._client, frame, interceptionId, this._userRequestInterceptionEnabled, event, redirectChain);
     this._requestIdToRequest.set(event.requestId, request);
-    this.emit(NetworkManagerEvents.Request, request);
+    this.emit(NetworkManagerEvents.Request, request.request);
   }
 
+  _createResponse(request: InterceptableRequest, responsePayload: Protocol.Network.Response): Response {
+    const remoteAddress: network.RemoteAddress = { ip: responsePayload.remoteIPAddress, port: responsePayload.remotePort };
+    const getResponseBody = async () => {
+      const response = await this._client.send('Network.getResponseBody', { requestId: request._requestId });
+      return Buffer.from(response.body, response.base64Encoded ? 'base64' : 'utf8');
+    };
+    return new network.Response(request.request, responsePayload.status, responsePayload.statusText, headersObject(responsePayload.headers), remoteAddress, getResponseBody);
+  }
 
-  _handleRequestRedirect(request: Request, responsePayload: Protocol.Network.Response) {
-    const response = new Response(this._client, request, responsePayload);
-    request._response = response;
-    request._redirectChain.push(request);
-    response._bodyLoadedPromiseFulfill.call(null, new Error('Response body is unavailable for redirect responses'));
+  _handleRequestRedirect(request: InterceptableRequest, responsePayload: Protocol.Network.Response) {
+    const response = this._createResponse(request, responsePayload);
+    request.request._redirectChain.push(request.request);
+    response._bodyLoaded(new Error('Response body is unavailable for redirect responses'));
     this._requestIdToRequest.delete(request._requestId);
     this._attemptedAuthentications.delete(request._interceptionId);
     this.emit(NetworkManagerEvents.Response, response);
-    this.emit(NetworkManagerEvents.RequestFinished, request);
+    this.emit(NetworkManagerEvents.RequestFinished, request.request);
   }
 
   _onResponseReceived(event: Protocol.Network.responseReceivedPayload) {
@@ -219,8 +231,7 @@ export class NetworkManager extends EventEmitter {
     // FileUpload sends a response without a matching request.
     if (!request)
       return;
-    const response = new Response(this._client, request, event.response);
-    request._response = response;
+    const response = this._createResponse(request, event.response);
     this.emit(NetworkManagerEvents.Response, response);
   }
 
@@ -233,11 +244,11 @@ export class NetworkManager extends EventEmitter {
 
     // Under certain conditions we never get the Network.responseReceived
     // event from protocol. @see https://crbug.com/883475
-    if (request.response())
-      request.response()._bodyLoadedPromiseFulfill.call(null);
+    if (request.request.response())
+      request.request.response()._bodyLoaded();
     this._requestIdToRequest.delete(request._requestId);
     this._attemptedAuthentications.delete(request._interceptionId);
-    this.emit(NetworkManagerEvents.RequestFinished, request);
+    this.emit(NetworkManagerEvents.RequestFinished, request.request);
   }
 
   _onLoadingFailed(event: Protocol.Network.loadingFailedPayload) {
@@ -246,97 +257,44 @@ export class NetworkManager extends EventEmitter {
     // @see https://crbug.com/750469
     if (!request)
       return;
-    request._failureText = event.errorText;
-    const response = request.response();
+    request.request._setFailureText(event.errorText);
+    const response = request.request.response();
     if (response)
-      response._bodyLoadedPromiseFulfill.call(null);
+      response._bodyLoaded();
     this._requestIdToRequest.delete(request._requestId);
     this._attemptedAuthentications.delete(request._interceptionId);
-    this.emit(NetworkManagerEvents.RequestFailed, request);
+    this.emit(NetworkManagerEvents.RequestFailed, request.request);
   }
 }
 
-export class Request {
-  _response: Response | null = null;
-  _redirectChain: Request[];
+const interceptableRequestSymbol = Symbol('interceptableRequest');
+
+export function toInterceptableRequest(request: network.Request<ElementHandle>): InterceptableRequest {
+  return (request as any)[interceptableRequestSymbol];
+}
+
+class InterceptableRequest {
+  readonly request: Request;
   _requestId: string;
   _interceptionId: string;
   private _client: CDPSession;
-  private _isNavigationRequest: boolean;
   private _allowInterception: boolean;
   private _interceptionHandled = false;
-  _failureText: string | null = null;
-  private _url: string;
-  private _resourceType: string;
-  private _method: string;
-  private _postData: string;
-  private _headers: {[key: string]: string} = {};
-  private _frame: Frame;
 
   constructor(client: CDPSession, frame: Frame | null, interceptionId: string, allowInterception: boolean, event: Protocol.Network.requestWillBeSentPayload, redirectChain: Request[]) {
     this._client = client;
     this._requestId = event.requestId;
-    this._isNavigationRequest = event.requestId === event.loaderId && event.type === 'Document';
     this._interceptionId = interceptionId;
     this._allowInterception = allowInterception;
 
-    this._url = event.request.url;
-    this._resourceType = event.type.toLowerCase();
-    this._method = event.request.method;
-    this._postData = event.request.postData;
-    this._frame = frame;
-    this._redirectChain = redirectChain;
-    for (const key of Object.keys(event.request.headers))
-      this._headers[key.toLowerCase()] = event.request.headers[key];
+    this.request = new network.Request(frame, redirectChain, event.requestId === event.loaderId && event.type === 'Document',
+        event.request.url, event.type.toLowerCase(), event.request.method, event.request.postData, headersObject(event.request.headers));
+    (this.request as any)[interceptableRequestSymbol] = this;
   }
 
-  url(): string {
-    return this._url;
-  }
-
-  resourceType(): string {
-    return this._resourceType;
-  }
-
-  method(): string {
-    return this._method;
-  }
-
-  postData(): string | undefined {
-    return this._postData;
-  }
-
-  headers(): {[key: string]: string} {
-    return this._headers;
-  }
-
-  response(): Response | null {
-    return this._response;
-  }
-
-  frame(): Frame | null {
-    return this._frame;
-  }
-
-  isNavigationRequest(): boolean {
-    return this._isNavigationRequest;
-  }
-
-  redirectChain(): Request[] {
-    return this._redirectChain.slice();
-  }
-
-  failure(): { errorText: string; } | null {
-    if (!this._failureText)
-      return null;
-    return {
-      errorText: this._failureText
-    };
-  }
-
-  async _continue(overrides: { url?: string; method?: string; postData?: string; headers?: {[key: string]: string}; } = {}) {
+  async continue(overrides: { url?: string; method?: string; postData?: string; headers?: {[key: string]: string}; } = {}) {
     // Request interception is not supported for data: urls.
-    if (this._url.startsWith('data:'))
+    if (this.request.url().startsWith('data:'))
       return;
     assert(this._allowInterception, 'Request Interception is not enabled!');
     assert(!this._interceptionHandled, 'Request is already handled!');
@@ -360,9 +318,9 @@ export class Request {
     });
   }
 
-  async _fulfill(response: { status: number; headers: {[key: string]: string}; contentType: string; body: (string | Buffer); }) {
+  async fulfill(response: { status: number; headers: {[key: string]: string}; contentType: string; body: (string | Buffer); }) {
     // Mocking responses for dataURL requests is not currently supported.
-    if (this._url.startsWith('data:'))
+    if (this.request.url().startsWith('data:'))
       return;
     assert(this._allowInterception, 'Request Interception is not enabled!');
     assert(!this._interceptionHandled, 'Request is already handled!');
@@ -393,9 +351,9 @@ export class Request {
     });
   }
 
-  async _abort(errorCode: string = 'failed') {
+  async abort(errorCode: string = 'failed') {
     // Request interception is not supported for data: urls.
-    if (this._url.startsWith('data:'))
+    if (this.request.url().startsWith('data:'))
       return;
     const errorReason = errorReasons[errorCode];
     assert(errorReason, 'Unknown error code: ' + errorCode);
@@ -430,94 +388,6 @@ const errorReasons = {
   'failed': 'Failed',
 };
 
-export class Response {
-  _bodyLoadedPromiseFulfill: any;
-  private _client: CDPSession;
-  private _request: Request;
-  private _contentPromise: Promise<Buffer> | null = null;
-  private _bodyLoadedPromise: Promise<Error | null>;
-  private _remoteAddress: { ip: string; port: number; };
-  private _status: number;
-  private _statusText: string;
-  private _url: string;
-  private _headers: {[key: string]: string} = {};
-
-  constructor(client: CDPSession, request: Request, responsePayload: Protocol.Network.Response) {
-    this._client = client;
-    this._request = request;
-
-    this._bodyLoadedPromise = new Promise(fulfill => {
-      this._bodyLoadedPromiseFulfill = fulfill;
-    });
-
-    this._remoteAddress = {
-      ip: responsePayload.remoteIPAddress,
-      port: responsePayload.remotePort,
-    };
-    this._status = responsePayload.status;
-    this._statusText = responsePayload.statusText;
-    this._url = request.url();
-    for (const key of Object.keys(responsePayload.headers))
-      this._headers[key.toLowerCase()] = responsePayload.headers[key];
-  }
-
-  remoteAddress(): { ip: string; port: number; } {
-    return this._remoteAddress;
-  }
-
-  url(): string {
-    return this._url;
-  }
-
-  ok(): boolean {
-    return this._status === 0 || (this._status >= 200 && this._status <= 299);
-  }
-
-  status(): number {
-    return this._status;
-  }
-
-  statusText(): string {
-    return this._statusText;
-  }
-
-  headers(): object {
-    return this._headers;
-  }
-
-  buffer(): Promise<Buffer> {
-    if (!this._contentPromise) {
-      this._contentPromise = this._bodyLoadedPromise.then(async error => {
-        if (error)
-          throw error;
-        const response = await this._client.send('Network.getResponseBody', {
-          requestId: this._request._requestId
-        });
-        return Buffer.from(response.body, response.base64Encoded ? 'base64' : 'utf8');
-      });
-    }
-    return this._contentPromise;
-  }
-
-  async text(): Promise<string> {
-    const content = await this.buffer();
-    return content.toString('utf8');
-  }
-
-  async json(): Promise<object> {
-    const content = await this.text();
-    return JSON.parse(content);
-  }
-
-  request(): Request {
-    return this._request;
-  }
-
-  frame(): Frame | null {
-    return this._request.frame();
-  }
-}
-
 function headersArray(headers: { [s: string]: string; }): { name: string; value: string; }[] {
   const result = [];
   for (const name in headers) {
@@ -527,6 +397,13 @@ function headersArray(headers: { [s: string]: string; }): { name: string; value:
   return result;
 }
 
+function headersObject(headers: Protocol.Network.Headers): network.Headers {
+  const result: network.Headers = {};
+  for (const key of Object.keys(headers))
+    result[key.toLowerCase()] = headers[key];
+  return result;
+}
+
 // List taken from https://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml with extra 306 and 418 codes.
 const STATUS_TEXTS = {
   '100': 'Continue',
diff --git a/src/chromium/api.ts b/src/chromium/api.ts
index ba8ceb3d4b..d15ccb9334 100644
--- a/src/chromium/api.ts
+++ b/src/chromium/api.ts
@@ -19,7 +19,7 @@ export { Worker, Workers } from './features/workers';
 export { Frame } from '../frames';
 export { Keyboard, Mouse } from '../input';
 export { ElementHandle } from './JSHandle';
-export { Request, Response } from './NetworkManager';
+export { Request, Response } from '../network';
 export { ConsoleMessage, FileChooser, Page } from './Page';
 export { Playwright } from './Playwright';
 export { Target } from './Target';
diff --git a/src/chromium/features/interception.ts b/src/chromium/features/interception.ts
index c71279cbe7..0fc7e9426b 100644
--- a/src/chromium/features/interception.ts
+++ b/src/chromium/features/interception.ts
@@ -1,7 +1,7 @@
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT license.
 
-import { NetworkManager, Request } from '../NetworkManager';
+import { NetworkManager, Request, toInterceptableRequest } from '../NetworkManager';
 
 export class Interception {
   private _networkManager: NetworkManager;
@@ -19,15 +19,15 @@ export class Interception {
   }
 
   async continue(request: Request, overrides: { url?: string; method?: string; postData?: string; headers?: {[key: string]: string}; } = {}) {
-    return request._continue(overrides);
+    return toInterceptableRequest(request).continue(overrides);
   }
 
   async fulfill(request: Request, response: { status: number; headers: {[key: string]: string}; contentType: string; body: (string | Buffer); }) {
-    return request._fulfill(response);
+    return toInterceptableRequest(request).fulfill(response);
   }
 
   async abort(request: Request, errorCode: string = 'failed') {
-    return request._abort(errorCode);
+    return toInterceptableRequest(request).abort(errorCode);
   }
 
   setOfflineMode(enabled: boolean) {
diff --git a/src/firefox/ExecutionContext.ts b/src/firefox/ExecutionContext.ts
index 72100e112d..fb785d3b47 100644
--- a/src/firefox/ExecutionContext.ts
+++ b/src/firefox/ExecutionContext.ts
@@ -17,14 +17,13 @@
 
 import {helper, debugError} from '../helper';
 import { createHandle, ElementHandle } from './JSHandle';
-import { Response } from './NetworkManager';
 import * as js from '../javascript';
 import { JugglerSession } from './Connection';
 
-export type ExecutionContext = js.ExecutionContext<ElementHandle, Response>;
-export type JSHandle = js.JSHandle<ElementHandle, Response>;
+export type ExecutionContext = js.ExecutionContext<ElementHandle>;
+export type JSHandle = js.JSHandle<ElementHandle>;
 
-export class ExecutionContextDelegate implements js.ExecutionContextDelegate<ElementHandle, Response> {
+export class ExecutionContextDelegate implements js.ExecutionContextDelegate<ElementHandle> {
   _session: JugglerSession;
   _executionContextId: string;
 
diff --git a/src/firefox/FrameManager.ts b/src/firefox/FrameManager.ts
index 6e5fedcdcf..da2c6e51c8 100644
--- a/src/firefox/FrameManager.ts
+++ b/src/firefox/FrameManager.ts
@@ -24,7 +24,6 @@ import { JSHandle, ExecutionContext, ExecutionContextDelegate } from './Executio
 import {NavigationWatchdog, NextNavigationWatchdog} from './NavigationWatchdog';
 import { ElementHandle } from './JSHandle';
 import { TimeoutSettings } from '../TimeoutSettings';
-import { Response } from './NetworkManager';
 import * as frames from '../frames';
 import * as js from '../javascript';
 
@@ -43,9 +42,9 @@ type FrameData = {
   firedEvents: Set<string>,
 };
 
-export type Frame = frames.Frame<ElementHandle, Response>;
+export type Frame = frames.Frame<ElementHandle>;
 
-export class FrameManager extends EventEmitter implements frames.FrameDelegate<ElementHandle, Response> {
+export class FrameManager extends EventEmitter implements frames.FrameDelegate<ElementHandle> {
   _session: JugglerSession;
   _page: Page;
   _networkManager: any;
diff --git a/src/firefox/JSHandle.ts b/src/firefox/JSHandle.ts
index 197d0101ed..e298f64e50 100644
--- a/src/firefox/JSHandle.ts
+++ b/src/firefox/JSHandle.ts
@@ -24,11 +24,10 @@ import { JugglerSession } from './Connection';
 import { Frame, FrameManager } from './FrameManager';
 import { Page } from './Page';
 import { JSHandle, ExecutionContext, markJSHandle, ExecutionContextDelegate } from './ExecutionContext';
-import { Response } from './NetworkManager';
 
 type SelectorRoot = Element | ShadowRoot | Document;
 
-export class ElementHandle extends js.JSHandle<ElementHandle, Response> {
+export class ElementHandle extends js.JSHandle<ElementHandle> {
   _frame: Frame;
   _frameId: string;
   _page: Page;
diff --git a/src/firefox/NetworkManager.ts b/src/firefox/NetworkManager.ts
index aab635dc6f..412588c0b5 100644
--- a/src/firefox/NetworkManager.ts
+++ b/src/firefox/NetworkManager.ts
@@ -1,7 +1,29 @@
+/**
+ * Copyright 2019 Google Inc. All rights reserved.
+ * Modifications copyright (c) Microsoft Corporation.
+ *
+ * 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 { EventEmitter } from 'events';
 import { assert, debugError, helper, RegisteredListener } from '../helper';
 import { JugglerSession } from './Connection';
-import { FrameManager } from './FrameManager';
+import { FrameManager, Frame } from './FrameManager';
+import * as network from '../network';
+import { ElementHandle } from './JSHandle';
+
+export type Request = network.Request<ElementHandle>;
+export type Response = network.Response<ElementHandle>;
 
 export const NetworkManagerEvents = {
   RequestFailed: Symbol('NetworkManagerEvents.RequestFailed'),
@@ -12,7 +34,7 @@ export const NetworkManagerEvents = {
 
 export class NetworkManager extends EventEmitter {
   private _session: JugglerSession;
-  private _requests: Map<string, Request>;
+  private _requests: Map<string, InterceptableRequest>;
   private _frameManager: FrameManager;
   private _eventListeners: RegisteredListener[];
 
@@ -39,7 +61,7 @@ export class NetworkManager extends EventEmitter {
     this._frameManager = frameManager;
   }
 
-  async setExtraHTTPHeaders(headers) {
+  async setExtraHTTPHeaders(headers: network.Headers) {
     const array = [];
     for (const [name, value] of Object.entries(headers)) {
       assert(helper.isString(value), `Expected value of header "${name}" to be String, but "${typeof value}" is found.`);
@@ -54,26 +76,37 @@ export class NetworkManager extends EventEmitter {
 
   _onRequestWillBeSent(event) {
     const redirected = event.redirectedFrom ? this._requests.get(event.redirectedFrom) : null;
-    const frame = redirected ? redirected.frame() : (this._frameManager && event.frameId ? this._frameManager.frame(event.frameId) : null);
+    const frame = redirected ? redirected.request.frame() : (this._frameManager && event.frameId ? this._frameManager.frame(event.frameId) : null);
     if (!frame)
       return;
-    let redirectChain = [];
+    let redirectChain: Request[] = [];
     if (redirected) {
-      redirectChain = redirected._redirectChain;
-      redirectChain.push(redirected);
+      redirectChain = redirected.request._redirectChain;
+      redirectChain.push(redirected.request);
       this._requests.delete(redirected._id);
     }
-    const request = new Request(this._session, frame, redirectChain, event);
+    const request = new InterceptableRequest(this._session, frame, redirectChain, event);
     this._requests.set(request._id, request);
-    this.emit(NetworkManagerEvents.Request, request);
+    this.emit(NetworkManagerEvents.Request, request.request);
   }
 
   _onResponseReceived(event) {
     const request = this._requests.get(event.requestId);
     if (!request)
       return;
-    const response = new Response(this._session, request, event);
-    request._response = response;
+    const remoteAddress: network.RemoteAddress = { ip: event.remoteIPAddress, port: event.remotePort };
+    const getResponseBody = async () => {
+      const response = await this._session.send('Network.getResponseBody', {
+        requestId: request._id
+      });
+      if (response.evicted)
+        throw new Error(`Response body for ${request.request.method()} ${request.request.url()} was evicted!`);
+      return Buffer.from(response.base64body, 'base64');
+    };
+    const headers: network.Headers = {};
+    for (const {name, value} of event.headers)
+      headers[name.toLowerCase()] = value;
+    const response = new network.Response(request.request, event.status, event.statusText, headers, remoteAddress, getResponseBody);
     this.emit(NetworkManagerEvents.Response, response);
   }
 
@@ -81,15 +114,16 @@ export class NetworkManager extends EventEmitter {
     const request = this._requests.get(event.requestId);
     if (!request)
       return;
+    const response = request.request.response();
     // Keep redirected requests in the map for future reference in redirectChain.
-    const isRedirected = request.response().status() >= 300 && request.response().status() <= 399;
+    const isRedirected = response.status() >= 300 && response.status() <= 399;
     if (isRedirected) {
-      request.response()._bodyLoadedPromiseFulfill.call(null, new Error('Response body is unavailable for redirect responses'));
+      response._bodyLoaded(new Error('Response body is unavailable for redirect responses'));
     } else {
       this._requests.delete(request._id);
-      request.response()._bodyLoadedPromiseFulfill.call(null);
+      response._bodyLoaded();
     }
-    this.emit(NetworkManagerEvents.RequestFinished, request);
+    this.emit(NetworkManagerEvents.RequestFinished, request.request);
   }
 
   _onRequestFailed(event) {
@@ -97,10 +131,10 @@ export class NetworkManager extends EventEmitter {
     if (!request)
       return;
     this._requests.delete(request._id);
-    if (request.response())
-      request.response()._bodyLoadedPromiseFulfill.call(null);
-    request._errorText = event.errorCode;
-    this.emit(NetworkManagerEvents.RequestFailed, request);
+    if (request.request.response())
+      request.request.response()._bodyLoaded();
+    request.request._setFailureText(event.errorCode);
+    this.emit(NetworkManagerEvents.RequestFailed, request.request);
   }
 }
 
@@ -130,46 +164,35 @@ const causeToResourceType = {
   TYPE_WEB_MANIFEST: 'manifest',
 };
 
-export class Request {
+const interceptableRequestSymbol = Symbol('interceptableRequest');
+
+export function toInterceptableRequest(request: network.Request<ElementHandle>): InterceptableRequest {
+  return (request as any)[interceptableRequestSymbol];
+}
+
+class InterceptableRequest {
+  readonly request: Request;
   _id: string;
-  private _session: any;
-  private _frame: any;
-  _redirectChain: any;
-  private _url: any;
-  private _postData: any;
-  private _suspended: any;
-  _response: any;
-  _errorText: any;
-  private _isNavigationRequest: any;
-  private _method: any;
-  private _resourceType: any;
-  private _headers: {};
+  private _session: JugglerSession;
+  private _suspended: boolean;
   private _interceptionHandled: boolean;
 
-  constructor(session, frame, redirectChain, payload) {
-    this._session = session;
-    this._frame = frame;
+  constructor(session: JugglerSession, frame: Frame, redirectChain: Request[], payload: any) {
     this._id = payload.requestId;
-    this._redirectChain = redirectChain;
-    this._url = payload.url;
-    this._postData = payload.postData;
+    this._session = session;
     this._suspended = payload.suspended;
-    this._response = null;
-    this._errorText = null;
-    this._isNavigationRequest = payload.isNavigationRequest;
-    this._method = payload.method;
-    this._resourceType = causeToResourceType[payload.cause] || 'other';
-    this._headers = {};
     this._interceptionHandled = false;
+
+    const headers: network.Headers = {};
     for (const {name, value} of payload.headers)
-      this._headers[name.toLowerCase()] = value;
+      headers[name.toLowerCase()] = value;
+
+    this.request = new network.Request(frame, redirectChain, payload.isNavigationRequest,
+        payload.url, causeToResourceType[payload.cause] || 'other', payload.method, payload.postData, headers);
+    (this.request as any)[interceptableRequestSymbol] = this;
   }
 
-  failure() {
-    return this._errorText ? {errorText: this._errorText} : null;
-  }
-
-  async _continue(overrides: any = {}) {
+  async continue(overrides: any = {}) {
     assert(!overrides.url, 'Playwright-Firefox does not support overriding URL');
     assert(!overrides.method, 'Playwright-Firefox does not support overriding method');
     assert(!overrides.postData, 'Playwright-Firefox does not support overriding postData');
@@ -187,7 +210,7 @@ export class Request {
     });
   }
 
-  async _abort() {
+  async abort() {
     assert(this._suspended, 'Request Interception is not enabled!');
     assert(!this._interceptionHandled, 'Request is already handled!');
     this._interceptionHandled = true;
@@ -197,129 +220,4 @@ export class Request {
       debugError(error);
     });
   }
-
-  postData() {
-    return this._postData;
-  }
-
-  headers() {
-    return {...this._headers};
-  }
-
-  redirectChain() {
-    return this._redirectChain.slice();
-  }
-
-  resourceType() {
-    return this._resourceType;
-  }
-
-  url() {
-    return this._url;
-  }
-
-  method() {
-    return this._method;
-  }
-
-  isNavigationRequest() {
-    return this._isNavigationRequest;
-  }
-
-  frame() {
-    return this._frame;
-  }
-
-  response() {
-    return this._response;
-  }
-}
-
-export class Response {
-  private _session: any;
-  private _request: any;
-  private _remoteIPAddress: any;
-  private _remotePort: any;
-  private _status: any;
-  private _statusText: any;
-  private _headers: {};
-  private _bodyLoadedPromise: Promise<unknown>;
-  private _bodyLoadedPromiseFulfill: (value?: unknown) => void;
-  private _contentPromise: any;
-
-  constructor(session, request, payload) {
-    this._session = session;
-    this._request = request;
-    this._remoteIPAddress = payload.remoteIPAddress;
-    this._remotePort = payload.remotePort;
-    this._status = payload.status;
-    this._statusText = payload.statusText;
-    this._headers = {};
-    for (const {name, value} of payload.headers)
-      this._headers[name.toLowerCase()] = value;
-    this._bodyLoadedPromise = new Promise(fulfill => {
-      this._bodyLoadedPromiseFulfill = fulfill;
-    });
-  }
-
-  buffer(): Promise<Buffer> {
-    if (!this._contentPromise) {
-      this._contentPromise = this._bodyLoadedPromise.then(async error => {
-        if (error)
-          throw error;
-        const response = await this._session.send('Network.getResponseBody', {
-          requestId: this._request._id
-        });
-        if (response.evicted)
-          throw new Error(`Response body for ${this._request.method()} ${this._request.url()} was evicted!`);
-        return Buffer.from(response.base64body, 'base64');
-      });
-    }
-    return this._contentPromise;
-  }
-
-  async text(): Promise<string> {
-    const content = await this.buffer();
-    return content.toString('utf8');
-  }
-
-  async json(): Promise<object> {
-    const content = await this.text();
-    return JSON.parse(content);
-  }
-
-  headers() {
-    return {...this._headers};
-  }
-
-  status() {
-    return this._status;
-  }
-
-  statusText() {
-    return this._statusText;
-  }
-
-  ok() {
-    return this._status >= 200 && this._status <= 299;
-  }
-
-  remoteAddress() {
-    return {
-      ip: this._remoteIPAddress,
-      port: this._remotePort,
-    };
-  }
-
-  frame() {
-    return this._request.frame();
-  }
-
-  url() {
-    return this._request.url();
-  }
-
-  request() {
-    return this._request;
-  }
 }
diff --git a/src/firefox/api.ts b/src/firefox/api.ts
index a553214777..f17df9e964 100644
--- a/src/firefox/api.ts
+++ b/src/firefox/api.ts
@@ -12,7 +12,7 @@ export { Interception } from './features/interception';
 export { Permissions } from './features/permissions';
 export { Frame } from './FrameManager';
 export { ElementHandle } from './JSHandle';
-export { Request, Response } from './NetworkManager';
+export { Request, Response } from '../network';
 export { ConsoleMessage, FileChooser, Page } from './Page';
 export { Playwright } from './Playwright';
 
diff --git a/src/firefox/features/interception.ts b/src/firefox/features/interception.ts
index 70b177bf68..f168ef05ba 100644
--- a/src/firefox/features/interception.ts
+++ b/src/firefox/features/interception.ts
@@ -1,7 +1,7 @@
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT license.
 
-import { NetworkManager, Request } from '../NetworkManager';
+import { NetworkManager, Request, toInterceptableRequest } from '../NetworkManager';
 
 export class Interception {
   private _networkManager: NetworkManager;
@@ -19,7 +19,7 @@ export class Interception {
   }
 
   async continue(request: Request, overrides: { url?: string; method?: string; postData?: string; headers?: {[key: string]: string}; } = {}) {
-    return request._continue(overrides);
+    return toInterceptableRequest(request).continue(overrides);
   }
 
   async fulfill(request: Request, response: { status: number; headers: {[key: string]: string}; contentType: string; body: (string | Buffer); }) {
@@ -27,6 +27,6 @@ export class Interception {
   }
 
   async abort(request: Request, errorCode: string = 'failed') {
-    return request._abort();
+    return toInterceptableRequest(request).abort();
   }
 }
diff --git a/src/frames.ts b/src/frames.ts
index 525f89249a..9dfb719c1b 100644
--- a/src/frames.ts
+++ b/src/frames.ts
@@ -18,6 +18,7 @@
 import * as types from './types';
 import * as fs from 'fs';
 import * as js from './javascript';
+import * as network from './network';
 import { helper, assert } from './helper';
 import { ClickOptions, MultiClickOptions, PointerActionOptions, SelectOption } from './input';
 import { waitForSelectorOrXPath, WaitTaskParams, WaitTask } from './waitTask';
@@ -26,11 +27,11 @@ import { TimeoutSettings } from './TimeoutSettings';
 const readFileAsync = helper.promisify(fs.readFile);
 
 type WorldType = 'main' | 'utility';
-type World<ElementHandle extends types.ElementHandle<ElementHandle, Response>, Response> = {
-  contextPromise: Promise<js.ExecutionContext<ElementHandle, Response>>;
-  contextResolveCallback: (c: js.ExecutionContext<ElementHandle, Response>) => void;
-  context: js.ExecutionContext<ElementHandle, Response> | null;
-  waitTasks: Set<WaitTask<ElementHandle, Response>>;
+type World<ElementHandle extends types.ElementHandle<ElementHandle>> = {
+  contextPromise: Promise<js.ExecutionContext<ElementHandle>>;
+  contextResolveCallback: (c: js.ExecutionContext<ElementHandle>) => void;
+  context: js.ExecutionContext<ElementHandle> | null;
+  waitTasks: Set<WaitTask<ElementHandle>>;
 };
 
 export type NavigateOptions = {
@@ -42,24 +43,24 @@ export type GotoOptions = NavigateOptions & {
   referer?: string,
 };
 
-export interface FrameDelegate<ElementHandle extends types.ElementHandle<ElementHandle, Response>, Response> {
+export interface FrameDelegate<ElementHandle extends types.ElementHandle<ElementHandle>> {
   timeoutSettings(): TimeoutSettings;
-  navigateFrame(frame: Frame<ElementHandle, Response>, url: string, options?: GotoOptions): Promise<Response | null>;
-  waitForFrameNavigation(frame: Frame<ElementHandle, Response>, options?: NavigateOptions): Promise<Response | null>;
-  setFrameContent(frame: Frame<ElementHandle, Response>, html: string, options?: NavigateOptions): Promise<void>;
-  adoptElementHandle(elementHandle: ElementHandle, context: js.ExecutionContext<ElementHandle, Response>): Promise<ElementHandle>;
+  navigateFrame(frame: Frame<ElementHandle>, url: string, options?: GotoOptions): Promise<network.Response<ElementHandle> | null>;
+  waitForFrameNavigation(frame: Frame<ElementHandle>, options?: NavigateOptions): Promise<network.Response<ElementHandle> | null>;
+  setFrameContent(frame: Frame<ElementHandle>, html: string, options?: NavigateOptions): Promise<void>;
+  adoptElementHandle(elementHandle: ElementHandle, context: js.ExecutionContext<ElementHandle>): Promise<ElementHandle>;
 }
 
-export class Frame<ElementHandle extends types.ElementHandle<ElementHandle, Response>, Response> {
-  _delegate: FrameDelegate<ElementHandle, Response>;
-  private _parentFrame: Frame<ElementHandle, Response>;
+export class Frame<ElementHandle extends types.ElementHandle<ElementHandle>> {
+  _delegate: FrameDelegate<ElementHandle>;
+  private _parentFrame: Frame<ElementHandle>;
   private _url = '';
   private _detached = false;
-  private _worlds = new Map<WorldType, World<ElementHandle, Response>>();
-  private _childFrames = new Set<Frame<ElementHandle, Response>>();
+  private _worlds = new Map<WorldType, World<ElementHandle>>();
+  private _childFrames = new Set<Frame<ElementHandle>>();
   private _name: string;
 
-  constructor(delegate: FrameDelegate<ElementHandle, Response>, parentFrame: Frame<ElementHandle, Response> | null) {
+  constructor(delegate: FrameDelegate<ElementHandle>, parentFrame: Frame<ElementHandle> | null) {
     this._delegate = delegate;
     this._parentFrame = parentFrame;
 
@@ -72,36 +73,36 @@ export class Frame<ElementHandle extends types.ElementHandle<ElementHandle, Resp
       this._parentFrame._childFrames.add(this);
   }
 
-  goto(url: string, options?: GotoOptions): Promise<Response | null> {
+  goto(url: string, options?: GotoOptions): Promise<network.Response<ElementHandle> | null> {
     return this._delegate.navigateFrame(this, url, options);
   }
 
-  waitForNavigation(options?: NavigateOptions): Promise<Response | null> {
+  waitForNavigation(options?: NavigateOptions): Promise<network.Response<ElementHandle> | null> {
     return this._delegate.waitForFrameNavigation(this, options);
   }
 
-  _mainContext(): Promise<js.ExecutionContext<ElementHandle, Response>> {
+  _mainContext(): Promise<js.ExecutionContext<ElementHandle>> {
     if (this._detached)
       throw new Error(`Execution Context is not available in detached frame "${this.url()}" (are you trying to evaluate?)`);
     return this._worlds.get('main').contextPromise;
   }
 
-  _utilityContext(): Promise<js.ExecutionContext<ElementHandle, Response>> {
+  _utilityContext(): Promise<js.ExecutionContext<ElementHandle>> {
     if (this._detached)
       throw new Error(`Execution Context is not available in detached frame "${this.url()}" (are you trying to evaluate?)`);
     return this._worlds.get('utility').contextPromise;
   }
 
-  executionContext(): Promise<js.ExecutionContext<ElementHandle, Response>> {
+  executionContext(): Promise<js.ExecutionContext<ElementHandle>> {
     return this._mainContext();
   }
 
-  evaluateHandle: types.EvaluateHandle<js.JSHandle<ElementHandle, Response>> = async (pageFunction, ...args) => {
+  evaluateHandle: types.EvaluateHandle<js.JSHandle<ElementHandle>> = async (pageFunction, ...args) => {
     const context = await this._mainContext();
     return context.evaluateHandle(pageFunction, ...args as any);
   }
 
-  evaluate: types.Evaluate<js.JSHandle<ElementHandle, Response>> = async (pageFunction, ...args) => {
+  evaluate: types.Evaluate<js.JSHandle<ElementHandle>> = async (pageFunction, ...args) => {
     const context = await this._mainContext();
     return context.evaluate(pageFunction, ...args as any);
   }
@@ -118,13 +119,13 @@ export class Frame<ElementHandle extends types.ElementHandle<ElementHandle, Resp
     return document.$x(expression);
   }
 
-  $eval: types.$Eval<js.JSHandle<ElementHandle, Response>> = async (selector, pageFunction, ...args) => {
+  $eval: types.$Eval<js.JSHandle<ElementHandle>> = async (selector, pageFunction, ...args) => {
     const context = await this._mainContext();
     const document = await context._document();
     return document.$eval(selector, pageFunction, ...args as any);
   }
 
-  $$eval: types.$$Eval<js.JSHandle<ElementHandle, Response>> = async (selector, pageFunction, ...args) => {
+  $$eval: types.$$Eval<js.JSHandle<ElementHandle>> = async (selector, pageFunction, ...args) => {
     const context = await this._mainContext();
     const document = await context._document();
     return document.$$eval(selector, pageFunction, ...args as any);
@@ -160,11 +161,11 @@ export class Frame<ElementHandle extends types.ElementHandle<ElementHandle, Resp
     return this._url;
   }
 
-  parentFrame(): Frame<ElementHandle, Response> | null {
+  parentFrame(): Frame<ElementHandle> | null {
     return this._parentFrame;
   }
 
-  childFrames(): Frame<ElementHandle, Response>[] {
+  childFrames(): Frame<ElementHandle>[] {
     return Array.from(this._childFrames);
   }
 
@@ -368,7 +369,7 @@ export class Frame<ElementHandle extends types.ElementHandle<ElementHandle, Resp
     await handle.dispose();
   }
 
-  waitFor(selectorOrFunctionOrTimeout: (string | number | Function), options: any = {}, ...args: any[]): Promise<js.JSHandle<ElementHandle, Response> | null> {
+  waitFor(selectorOrFunctionOrTimeout: (string | number | Function), options: any = {}, ...args: any[]): Promise<js.JSHandle<ElementHandle> | null> {
     const xPathPattern = '//';
 
     if (helper.isString(selectorOrFunctionOrTimeout)) {
@@ -415,7 +416,7 @@ export class Frame<ElementHandle extends types.ElementHandle<ElementHandle, Resp
   waitForFunction(
     pageFunction: Function | string,
     options: { polling?: string | number; timeout?: number; } = {},
-    ...args): Promise<js.JSHandle<ElementHandle, Response>> {
+    ...args): Promise<js.JSHandle<ElementHandle>> {
     const {
       polling = 'raf',
       timeout = this._delegate.timeoutSettings().timeout(),
@@ -451,7 +452,7 @@ export class Frame<ElementHandle extends types.ElementHandle<ElementHandle, Resp
     this._parentFrame = null;
   }
 
-  private _scheduleWaitTask(params: WaitTaskParams, world: World<ElementHandle, Response>): Promise<js.JSHandle<ElementHandle, Response>> {
+  private _scheduleWaitTask(params: WaitTaskParams, world: World<ElementHandle>): Promise<js.JSHandle<ElementHandle>> {
     const task = new WaitTask(params, () => world.waitTasks.delete(task));
     world.waitTasks.add(task);
     if (world.context)
@@ -459,7 +460,7 @@ export class Frame<ElementHandle extends types.ElementHandle<ElementHandle, Resp
     return task.promise;
   }
 
-  private _setContext(worldType: WorldType, context: js.ExecutionContext<ElementHandle, Response> | null) {
+  private _setContext(worldType: WorldType, context: js.ExecutionContext<ElementHandle> | null) {
     const world = this._worlds.get(worldType);
     world.context = context;
     if (context) {
@@ -473,7 +474,7 @@ export class Frame<ElementHandle extends types.ElementHandle<ElementHandle, Resp
     }
   }
 
-  _contextCreated(worldType: WorldType, context: js.ExecutionContext<ElementHandle, Response>) {
+  _contextCreated(worldType: WorldType, context: js.ExecutionContext<ElementHandle>) {
     const world = this._worlds.get(worldType);
     // In case of multiple sessions to the same target, there's a race between
     // connections so we might end up creating multiple isolated worlds.
@@ -482,14 +483,14 @@ export class Frame<ElementHandle extends types.ElementHandle<ElementHandle, Resp
       this._setContext(worldType, context);
   }
 
-  _contextDestroyed(context: js.ExecutionContext<ElementHandle, Response>) {
+  _contextDestroyed(context: js.ExecutionContext<ElementHandle>) {
     for (const [worldType, world] of this._worlds) {
       if (world.context === context)
         this._setContext(worldType, null);
     }
   }
 
-  private async _adoptElementHandle(elementHandle: ElementHandle, context: js.ExecutionContext<ElementHandle, Response>, dispose: boolean): Promise<ElementHandle> {
+  private async _adoptElementHandle(elementHandle: ElementHandle, context: js.ExecutionContext<ElementHandle>, dispose: boolean): Promise<ElementHandle> {
     if (elementHandle.executionContext() === context)
       return elementHandle;
     const handle = this._delegate.adoptElementHandle(elementHandle, context);
diff --git a/src/javascript.ts b/src/javascript.ts
index 9b773e71af..e47cb3660a 100644
--- a/src/javascript.ts
+++ b/src/javascript.ts
@@ -7,38 +7,38 @@ import * as injectedSource from './generated/injectedSource';
 import * as cssSelectorEngineSource from './generated/cssSelectorEngineSource';
 import * as xpathSelectorEngineSource from './generated/xpathSelectorEngineSource';
 
-export interface ExecutionContextDelegate<ElementHandle extends types.ElementHandle<ElementHandle, Response>, Response> {
-  evaluate(context: ExecutionContext<ElementHandle, Response>, returnByValue: boolean, pageFunction: string | Function, ...args: any[]): Promise<any>;
-  getProperties(handle: JSHandle<ElementHandle, Response>): Promise<Map<string, JSHandle<ElementHandle, Response>>>;
-  releaseHandle(handle: JSHandle<ElementHandle, Response>): Promise<void>;
-  handleToString(handle: JSHandle<ElementHandle, Response>): string;
-  handleJSONValue(handle: JSHandle<ElementHandle, Response>): Promise<any>;
+export interface ExecutionContextDelegate<ElementHandle extends types.ElementHandle<ElementHandle>> {
+  evaluate(context: ExecutionContext<ElementHandle>, returnByValue: boolean, pageFunction: string | Function, ...args: any[]): Promise<any>;
+  getProperties(handle: JSHandle<ElementHandle>): Promise<Map<string, JSHandle<ElementHandle>>>;
+  releaseHandle(handle: JSHandle<ElementHandle>): Promise<void>;
+  handleToString(handle: JSHandle<ElementHandle>): string;
+  handleJSONValue(handle: JSHandle<ElementHandle>): Promise<any>;
 }
 
-export class ExecutionContext<ElementHandle extends types.ElementHandle<ElementHandle, Response>, Response> {
-  _delegate: ExecutionContextDelegate<ElementHandle, Response>;
-  private _frame: frames.Frame<ElementHandle, Response>;
-  private _injectedPromise: Promise<JSHandle<ElementHandle, Response>> | null = null;
+export class ExecutionContext<ElementHandle extends types.ElementHandle<ElementHandle>> {
+  _delegate: ExecutionContextDelegate<ElementHandle>;
+  private _frame: frames.Frame<ElementHandle>;
+  private _injectedPromise: Promise<JSHandle<ElementHandle>> | null = null;
   private _documentPromise: Promise<ElementHandle> | null = null;
 
-  constructor(delegate: ExecutionContextDelegate<ElementHandle, Response>, frame: frames.Frame<ElementHandle, Response> | null) {
+  constructor(delegate: ExecutionContextDelegate<ElementHandle>, frame: frames.Frame<ElementHandle> | null) {
     this._delegate = delegate;
     this._frame = frame;
   }
 
-  frame(): frames.Frame<ElementHandle, Response> | null {
+  frame(): frames.Frame<ElementHandle> | null {
     return this._frame;
   }
 
-  evaluate: types.Evaluate<JSHandle<ElementHandle, Response>> = (pageFunction, ...args) => {
+  evaluate: types.Evaluate<JSHandle<ElementHandle>> = (pageFunction, ...args) => {
     return this._delegate.evaluate(this, true /* returnByValue */, pageFunction, ...args);
   }
 
-  evaluateHandle: types.EvaluateHandle<JSHandle<ElementHandle, Response>> = (pageFunction, ...args) => {
+  evaluateHandle: types.EvaluateHandle<JSHandle<ElementHandle>> = (pageFunction, ...args) => {
     return this._delegate.evaluate(this, false /* returnByValue */, pageFunction, ...args);
   }
 
-  _injected(): Promise<JSHandle<ElementHandle, Response>> {
+  _injected(): Promise<JSHandle<ElementHandle>> {
     if (!this._injectedPromise) {
       const engineSources = [cssSelectorEngineSource.source, xpathSelectorEngineSource.source];
       const source = `
@@ -58,27 +58,27 @@ export class ExecutionContext<ElementHandle extends types.ElementHandle<ElementH
   }
 }
 
-export class JSHandle<ElementHandle extends types.ElementHandle<ElementHandle, Response>, Response> {
-  _context: ExecutionContext<ElementHandle, Response>;
+export class JSHandle<ElementHandle extends types.ElementHandle<ElementHandle>> {
+  _context: ExecutionContext<ElementHandle>;
   _disposed = false;
 
-  constructor(context: ExecutionContext<ElementHandle, Response>) {
+  constructor(context: ExecutionContext<ElementHandle>) {
     this._context = context;
   }
 
-  executionContext(): ExecutionContext<ElementHandle, Response> {
+  executionContext(): ExecutionContext<ElementHandle> {
     return this._context;
   }
 
-  evaluate: types.EvaluateOn<JSHandle<ElementHandle, Response>> = (pageFunction, ...args) => {
+  evaluate: types.EvaluateOn<JSHandle<ElementHandle>> = (pageFunction, ...args) => {
     return this._context.evaluate(pageFunction, this, ...args);
   }
 
-  evaluateHandle: types.EvaluateHandleOn<JSHandle<ElementHandle, Response>> = (pageFunction, ...args) => {
+  evaluateHandle: types.EvaluateHandleOn<JSHandle<ElementHandle>> = (pageFunction, ...args) => {
     return this._context.evaluateHandle(pageFunction, this, ...args);
   }
 
-  async getProperty(propertyName: string): Promise<JSHandle<ElementHandle, Response> | null> {
+  async getProperty(propertyName: string): Promise<JSHandle<ElementHandle> | null> {
     const objectHandle = await this.evaluateHandle((object, propertyName) => {
       const result = {__proto__: null};
       result[propertyName] = object[propertyName];
@@ -90,7 +90,7 @@ export class JSHandle<ElementHandle extends types.ElementHandle<ElementHandle, R
     return result;
   }
 
-  getProperties(): Promise<Map<string, JSHandle<ElementHandle, Response>>> {
+  getProperties(): Promise<Map<string, JSHandle<ElementHandle>>> {
     return this._context._delegate.getProperties(this);
   }
 
diff --git a/src/network.ts b/src/network.ts
index f95870db08..0d3de397ec 100644
--- a/src/network.ts
+++ b/src/network.ts
@@ -1,6 +1,9 @@
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT license.
 
+import * as types from './types';
+import * as frames from './frames';
+
 export type NetworkCookie = {
   name: string,
   value: string,
@@ -44,3 +47,169 @@ export function filterCookies(cookies: NetworkCookie[], urls: string[]) {
     return false;
   });
 }
+
+export type Headers = { [key: string]: string };
+
+export class Request<ElementHandle extends types.ElementHandle<ElementHandle>> {
+  _response: Response<ElementHandle> | null = null;
+  _redirectChain: Request<ElementHandle>[];
+  private _isNavigationRequest: boolean;
+  private _failureText: string | null = null;
+  private _url: string;
+  private _resourceType: string;
+  private _method: string;
+  private _postData: string;
+  private _headers: Headers;
+  private _frame: frames.Frame<ElementHandle>;
+
+  constructor(frame: frames.Frame<ElementHandle> | null, redirectChain: Request<ElementHandle>[], isNavigationRequest: boolean,
+    url: string, resourceType: string, method: string, postData: string, headers: Headers) {
+    this._frame = frame;
+    this._redirectChain = redirectChain;
+    this._isNavigationRequest = isNavigationRequest;
+    this._url = url;
+    this._resourceType = resourceType;
+    this._method = method;
+    this._postData = postData;
+    this._headers = headers;
+  }
+
+  _setFailureText(failureText: string) {
+    this._failureText = failureText;
+  }
+
+  url(): string {
+    return this._url;
+  }
+
+  resourceType(): string {
+    return this._resourceType;
+  }
+
+  method(): string {
+    return this._method;
+  }
+
+  postData(): string | undefined {
+    return this._postData;
+  }
+
+  headers(): {[key: string]: string} {
+    return this._headers;
+  }
+
+  response(): Response<ElementHandle> | null {
+    return this._response;
+  }
+
+  frame(): frames.Frame<ElementHandle> | null {
+    return this._frame;
+  }
+
+  isNavigationRequest(): boolean {
+    return this._isNavigationRequest;
+  }
+
+  redirectChain(): Request<ElementHandle>[] {
+    return this._redirectChain.slice();
+  }
+
+  failure(): { errorText: string; } | null {
+    if (!this._failureText)
+      return null;
+    return {
+      errorText: this._failureText
+    };
+  }
+}
+
+export type RemoteAddress = {
+  ip: string,
+  port: number,
+};
+
+type GetResponseBodyCallback = () => Promise<Buffer>;
+
+export class Response<ElementHandle extends types.ElementHandle<ElementHandle>> {
+  private _request: Request<ElementHandle>;
+  private _contentPromise: Promise<Buffer> | null = null;
+  private _bodyLoadedPromise: Promise<Error | null>;
+  private _bodyLoadedPromiseFulfill: any;
+  private _remoteAddress: RemoteAddress;
+  private _status: number;
+  private _statusText: string;
+  private _url: string;
+  private _headers: Headers;
+  private _getResponseBodyCallback: GetResponseBodyCallback;
+
+  constructor(request: Request<ElementHandle>, status: number, statusText: string, headers: Headers, remoteAddress: RemoteAddress, getResponseBodyCallback: GetResponseBodyCallback) {
+    this._request = request;
+    this._request._response = this;
+    this._status = status;
+    this._statusText = statusText;
+    this._url = request.url();
+    this._headers = headers;
+    this._remoteAddress = remoteAddress;
+    this._getResponseBodyCallback = getResponseBodyCallback;
+    this._bodyLoadedPromise = new Promise(fulfill => {
+      this._bodyLoadedPromiseFulfill = fulfill;
+    });
+  }
+
+  _bodyLoaded(error?: Error) {
+    this._bodyLoadedPromiseFulfill.call(null, error);
+  }
+
+  remoteAddress(): RemoteAddress {
+    return this._remoteAddress;
+  }
+
+  url(): string {
+    return this._url;
+  }
+
+  ok(): boolean {
+    return this._status === 0 || (this._status >= 200 && this._status <= 299);
+  }
+
+  status(): number {
+    return this._status;
+  }
+
+  statusText(): string {
+    return this._statusText;
+  }
+
+  headers(): object {
+    return this._headers;
+  }
+
+  buffer(): Promise<Buffer> {
+    if (!this._contentPromise) {
+      this._contentPromise = this._bodyLoadedPromise.then(async error => {
+        if (error)
+          throw error;
+        return this._getResponseBodyCallback();
+      });
+    }
+    return this._contentPromise;
+  }
+
+  async text(): Promise<string> {
+    const content = await this.buffer();
+    return content.toString('utf8');
+  }
+
+  async json(): Promise<object> {
+    const content = await this.text();
+    return JSON.parse(content);
+  }
+
+  request(): Request<ElementHandle> {
+    return this._request;
+  }
+
+  frame(): frames.Frame<ElementHandle> | null {
+    return this._request.frame();
+  }
+}
diff --git a/src/types.ts b/src/types.ts
index a206169056..1d03323d08 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -15,12 +15,12 @@ export type $$Eval<Handle> = <Args extends any[], R>(selector: string, pageFunct
 export type EvaluateOn<Handle> = <Args extends any[], R>(pageFunction: PageFunctionOn<any, Args, R>, ...args: Boxed<Args, Handle>) => Promise<R>;
 export type EvaluateHandleOn<Handle> = <Args extends any[]>(pageFunction: PageFunctionOn<any, Args>, ...args: Boxed<Args, Handle>) => Promise<Handle>;
 
-export interface ElementHandle<EHandle extends ElementHandle<EHandle, Response>, Response> extends js.JSHandle<EHandle, Response> {
+export interface ElementHandle<EHandle extends ElementHandle<EHandle>> extends js.JSHandle<EHandle> {
   $(selector: string): Promise<EHandle | null>;
   $x(expression: string): Promise<EHandle[]>;
   $$(selector: string): Promise<EHandle[]>;
-  $eval: $Eval<js.JSHandle<EHandle, Response>>;
-  $$eval: $$Eval<js.JSHandle<EHandle, Response>>;
+  $eval: $Eval<js.JSHandle<EHandle>>;
+  $$eval: $$Eval<js.JSHandle<EHandle>>;
   click(options?: input.ClickOptions): Promise<void>;
   dblclick(options?: input.MultiClickOptions): Promise<void>;
   tripleclick(options?: input.MultiClickOptions): Promise<void>;
diff --git a/src/waitTask.ts b/src/waitTask.ts
index 2c1b15ceac..fda9fb57f4 100644
--- a/src/waitTask.ts
+++ b/src/waitTask.ts
@@ -15,12 +15,12 @@ export type WaitTaskParams = {
   args: any[];
 };
 
-export class WaitTask<ElementHandle extends types.ElementHandle<ElementHandle, Response>, Response> {
-  readonly promise: Promise<js.JSHandle<ElementHandle, Response>>;
+export class WaitTask<ElementHandle extends types.ElementHandle<ElementHandle>> {
+  readonly promise: Promise<js.JSHandle<ElementHandle>>;
   private _cleanup: () => void;
   private _params: WaitTaskParams & { predicateBody: string };
   private _runCount: number;
-  private _resolve: (result: js.JSHandle<ElementHandle, Response>) => void;
+  private _resolve: (result: js.JSHandle<ElementHandle>) => void;
   private _reject: (reason: Error) => void;
   private _timeoutTimer: NodeJS.Timer;
   private _terminated: boolean;
@@ -39,7 +39,7 @@ export class WaitTask<ElementHandle extends types.ElementHandle<ElementHandle, R
     };
     this._cleanup = cleanup;
     this._runCount = 0;
-    this.promise = new Promise<js.JSHandle<ElementHandle, Response>>((resolve, reject) => {
+    this.promise = new Promise<js.JSHandle<ElementHandle>>((resolve, reject) => {
       this._resolve = resolve;
       this._reject = reject;
     });
@@ -57,9 +57,9 @@ export class WaitTask<ElementHandle extends types.ElementHandle<ElementHandle, R
     this._doCleanup();
   }
 
-  async rerun(context: js.ExecutionContext<ElementHandle, Response>) {
+  async rerun(context: js.ExecutionContext<ElementHandle>) {
     const runCount = ++this._runCount;
-    let success: js.JSHandle<ElementHandle, Response> | null = null;
+    let success: js.JSHandle<ElementHandle> | null = null;
     let error = null;
     try {
       success = await context.evaluateHandle(waitForPredicatePageFunction, this._params.predicateBody, this._params.polling, this._params.timeout, ...this._params.args);
diff --git a/src/webkit/ExecutionContext.ts b/src/webkit/ExecutionContext.ts
index 23c8518cdc..31ad9cc403 100644
--- a/src/webkit/ExecutionContext.ts
+++ b/src/webkit/ExecutionContext.ts
@@ -20,16 +20,15 @@ import { helper } from '../helper';
 import { valueFromRemoteObject, releaseObject } from './protocolHelper';
 import { createJSHandle, ElementHandle } from './JSHandle';
 import { Protocol } from './protocol';
-import { Response } from './NetworkManager';
 import * as js from '../javascript';
 
 export const EVALUATION_SCRIPT_URL = '__playwright_evaluation_script__';
 const SOURCE_URL_REGEX = /^[\040\t]*\/\/[@#] sourceURL=\s*(\S*?)\s*$/m;
 
-export type ExecutionContext = js.ExecutionContext<ElementHandle, Response>;
-export type JSHandle = js.JSHandle<ElementHandle, Response>;
+export type ExecutionContext = js.ExecutionContext<ElementHandle>;
+export type JSHandle = js.JSHandle<ElementHandle>;
 
-export class ExecutionContextDelegate implements js.ExecutionContextDelegate<ElementHandle, Response> {
+export class ExecutionContextDelegate implements js.ExecutionContextDelegate<ElementHandle> {
   private _globalObjectId?: string;
   _session: TargetSession;
   private _contextId: number;
diff --git a/src/webkit/FrameManager.ts b/src/webkit/FrameManager.ts
index f1b30e9ba9..a6fa88e9b0 100644
--- a/src/webkit/FrameManager.ts
+++ b/src/webkit/FrameManager.ts
@@ -42,9 +42,9 @@ type FrameData = {
   id: string,
 };
 
-export type Frame = frames.Frame<ElementHandle, Response>;
+export type Frame = frames.Frame<ElementHandle>;
 
-export class FrameManager extends EventEmitter implements frames.FrameDelegate<ElementHandle, Response> {
+export class FrameManager extends EventEmitter implements frames.FrameDelegate<ElementHandle> {
   _session: TargetSession;
   _page: Page;
   _networkManager: NetworkManager;
diff --git a/src/webkit/JSHandle.ts b/src/webkit/JSHandle.ts
index 55107b3bd6..f35c9689f1 100644
--- a/src/webkit/JSHandle.ts
+++ b/src/webkit/JSHandle.ts
@@ -20,7 +20,6 @@ import { assert, debugError, helper } from '../helper';
 import * as input from '../input';
 import { TargetSession } from './Connection';
 import { JSHandle, ExecutionContext, ExecutionContextDelegate, markJSHandle } from './ExecutionContext';
-import { Response } from './NetworkManager';
 import { FrameManager } from './FrameManager';
 import { Page } from './Page';
 import { Protocol } from './protocol';
@@ -44,7 +43,7 @@ export function createJSHandle(context: ExecutionContext, remoteObject: Protocol
   return handle;
 }
 
-export class ElementHandle extends js.JSHandle<ElementHandle, Response> {
+export class ElementHandle extends js.JSHandle<ElementHandle> {
   private _client: TargetSession;
   private _remoteObject: Protocol.Runtime.RemoteObject;
   private _page: Page;
diff --git a/src/webkit/NetworkManager.ts b/src/webkit/NetworkManager.ts
index 561846e28f..eed204e280 100644
--- a/src/webkit/NetworkManager.ts
+++ b/src/webkit/NetworkManager.ts
@@ -20,6 +20,8 @@ import { TargetSession } from './Connection';
 import { Frame, FrameManager } from './FrameManager';
 import { assert, helper, RegisteredListener } from '../helper';
 import { Protocol } from './protocol';
+import * as network from '../network';
+import { ElementHandle } from './JSHandle';
 
 export const NetworkManagerEvents = {
   Request: Symbol('Events.NetworkManager.Request'),
@@ -28,11 +30,14 @@ export const NetworkManagerEvents = {
   RequestFinished: Symbol('Events.NetworkManager.RequestFinished'),
 };
 
+export type Request = network.Request<ElementHandle>;
+export type Response = network.Response<ElementHandle>;
+
 export class NetworkManager extends EventEmitter {
   private _sesssion: TargetSession;
   private _frameManager: FrameManager;
-  private _requestIdToRequest = new Map<string, Request>();
-  private _extraHTTPHeaders: {[key: string]: string} = {};
+  private _requestIdToRequest = new Map<string, InterceptableRequest>();
+  private _extraHTTPHeaders: network.Headers = {};
   private _attemptedAuthentications = new Set<string>();
   private _userCacheDisabled = false;
   private _sessionListeners: RegisteredListener[] = [];
@@ -89,30 +94,38 @@ export class NetworkManager extends EventEmitter {
   }
 
   _onRequestWillBeSent(event: Protocol.Network.requestWillBeSentPayload, interceptionId: string | null) {
-    let redirectChain = [];
+    let redirectChain: Request[] = [];
     if (event.redirectResponse) {
       const request = this._requestIdToRequest.get(event.requestId);
       // If we connect late to the target, we could have missed the requestWillBeSent event.
       if (request) {
         this._handleRequestRedirect(request, event.redirectResponse);
-        redirectChain = request._redirectChain;
+        redirectChain = request.request._redirectChain;
       }
     }
     const frame = event.frameId && this._frameManager ? this._frameManager.frame(event.frameId) : null;
-    const request = new Request(frame, interceptionId, event, redirectChain);
+    const request = new InterceptableRequest(frame, interceptionId, event, redirectChain);
     this._requestIdToRequest.set(event.requestId, request);
-    this.emit(NetworkManagerEvents.Request, request);
+    this.emit(NetworkManagerEvents.Request, request.request);
   }
 
-  _handleRequestRedirect(request: Request, responsePayload: Protocol.Network.Response) {
-    const response = new Response(this._sesssion, request, responsePayload);
-    request._response = response;
-    request._redirectChain.push(request);
-    response._bodyLoadedPromiseFulfill.call(null, new Error('Response body is unavailable for redirect responses'));
+  _createResponse(request: InterceptableRequest, responsePayload: Protocol.Network.Response): Response {
+    const remoteAddress: network.RemoteAddress = { ip: '', port: 0 };
+    const getResponseBody = async () => {
+      const response = await this._sesssion.send('Network.getResponseBody', { requestId: request._requestId });
+      return Buffer.from(response.body, response.base64Encoded ? 'base64' : 'utf8');
+    };
+    return new network.Response(request.request, responsePayload.status, responsePayload.statusText, headersObject(responsePayload.headers), remoteAddress, getResponseBody);
+  }
+
+  _handleRequestRedirect(request: InterceptableRequest, responsePayload: Protocol.Network.Response) {
+    const response = this._createResponse(request, responsePayload);
+    request.request._redirectChain.push(request.request);
+    response._bodyLoaded(new Error('Response body is unavailable for redirect responses'));
     this._requestIdToRequest.delete(request._requestId);
     this._attemptedAuthentications.delete(request._interceptionId);
     this.emit(NetworkManagerEvents.Response, response);
-    this.emit(NetworkManagerEvents.RequestFinished, request);
+    this.emit(NetworkManagerEvents.RequestFinished, request.request);
   }
 
   _onResponseReceived(event: Protocol.Network.responseReceivedPayload) {
@@ -120,8 +133,7 @@ export class NetworkManager extends EventEmitter {
     // FileUpload sends a response without a matching request.
     if (!request)
       return;
-    const response = new Response(this._sesssion, request, event.response);
-    request._response = response;
+    const response = this._createResponse(request, event.response);
     this.emit(NetworkManagerEvents.Response, response);
   }
 
@@ -134,11 +146,11 @@ export class NetworkManager extends EventEmitter {
 
     // Under certain conditions we never get the Network.responseReceived
     // event from protocol. @see https://crbug.com/883475
-    if (request.response())
-      request.response()._bodyLoadedPromiseFulfill.call(null);
+    if (request.request.response())
+      request.request.response()._bodyLoaded();
     this._requestIdToRequest.delete(request._requestId);
     this._attemptedAuthentications.delete(request._interceptionId);
-    this.emit(NetworkManagerEvents.RequestFinished, request);
+    this.emit(NetworkManagerEvents.RequestFinished, request.request);
   }
 
   _onLoadingFailed(event: Protocol.Network.loadingFailedPayload) {
@@ -147,166 +159,41 @@ export class NetworkManager extends EventEmitter {
     // @see https://crbug.com/750469
     if (!request)
       return;
-    request._failureText = event.errorText;
-    const response = request.response();
+    request.request._setFailureText(event.errorText);
+    const response = request.request.response();
     if (response)
-      response._bodyLoadedPromiseFulfill.call(null);
+      response._bodyLoaded();
     this._requestIdToRequest.delete(request._requestId);
     this._attemptedAuthentications.delete(request._interceptionId);
-    this.emit(NetworkManagerEvents.RequestFailed, request);
+    this.emit(NetworkManagerEvents.RequestFailed, request.request);
   }
 }
 
-export class Request {
-  _response: Response | null = null;
-  _redirectChain: Request[];
+const interceptableRequestSymbol = Symbol('interceptableRequest');
+
+export function toInterceptableRequest(request: network.Request<ElementHandle>): InterceptableRequest {
+  return (request as any)[interceptableRequestSymbol];
+}
+
+class InterceptableRequest {
+  readonly request: Request;
   _requestId: string;
   _interceptionId: string;
-  private _isNavigationRequest: boolean;
-  _failureText: string | null = null;
-  private _url: string;
-  private _resourceType: string;
-  private _method: string;
-  private _postData: string;
-  private _headers: {[key: string]: string} = {};
-  private _frame: Frame;
 
   constructor(frame: Frame | null, interceptionId: string, event: Protocol.Network.requestWillBeSentPayload, redirectChain: Request[]) {
     this._requestId = event.requestId;
     // TODO(einbinder) this will fail if we are an XHR document request
-    this._isNavigationRequest = event.type === 'Document';
+    const isNavigationRequest = event.type === 'Document';
     this._interceptionId = interceptionId;
-
-    this._url = event.request.url;
-    this._resourceType = event.type ? event.type.toLowerCase() : 'Unknown';
-    this._method = event.request.method;
-    this._postData = event.request.postData;
-    this._frame = frame;
-    this._redirectChain = redirectChain;
-    for (const key of Object.keys(event.request.headers))
-      this._headers[key.toLowerCase()] = event.request.headers[key];
-  }
-
-  url(): string {
-    return this._url;
-  }
-
-  resourceType(): string {
-    return this._resourceType;
-  }
-
-  method(): string {
-    return this._method;
-  }
-
-  postData(): string | undefined {
-    return this._postData;
-  }
-
-  headers(): {[key: string]: string} {
-    return this._headers;
-  }
-
-  response(): Response | null {
-    return this._response;
-  }
-
-  frame(): Frame | null {
-    return this._frame;
-  }
-
-  isNavigationRequest(): boolean {
-    return this._isNavigationRequest;
-  }
-
-  redirectChain(): Request[] {
-    return this._redirectChain.slice();
-  }
-
-  failure(): { errorText: string; } | null {
-    if (!this._failureText)
-      return null;
-    return {
-      errorText: this._failureText
-    };
+    this.request = new network.Request(frame, redirectChain, isNavigationRequest, event.request.url,
+        event.type ? event.type.toLowerCase() : 'Unknown', event.request.method, event.request.postData, headersObject(event.request.headers));
+    (this.request as any)[interceptableRequestSymbol] = this;
   }
 }
 
-export class Response {
-  _bodyLoadedPromiseFulfill: any;
-  private _client: TargetSession;
-  private _request: Request;
-  private _contentPromise: Promise<Buffer> | null = null;
-  private _bodyLoadedPromise: Promise<Error | null>;
-  private _status: number;
-  private _statusText: string;
-  private _url: string;
-  private _headers: {[key: string]: string} = {};
-
-  constructor(client: TargetSession, request: Request, responsePayload: Protocol.Network.Response) {
-    this._client = client;
-    this._request = request;
-
-    this._bodyLoadedPromise = new Promise(fulfill => {
-      this._bodyLoadedPromiseFulfill = fulfill;
-    });
-
-    this._status = responsePayload.status;
-    this._statusText = responsePayload.statusText;
-    this._url = request.url();
-    for (const key of Object.keys(responsePayload.headers))
-      this._headers[key.toLowerCase()] = responsePayload.headers[key];
-  }
-
-  url(): string {
-    return this._url;
-  }
-
-  ok(): boolean {
-    return this._status === 0 || (this._status >= 200 && this._status <= 299);
-  }
-
-  status(): number {
-    return this._status;
-  }
-
-  statusText(): string {
-    return this._statusText;
-  }
-
-  headers(): object {
-    return this._headers;
-  }
-
-  buffer(): Promise<Buffer> {
-    if (!this._contentPromise) {
-      this._contentPromise = this._bodyLoadedPromise.then(async error => {
-        if (error)
-          throw error;
-        const response = await this._client.send('Network.getResponseBody', {
-          requestId: this._request._requestId
-        });
-        return Buffer.from(response.body, response.base64Encoded ? 'base64' : 'utf8');
-      });
-    }
-    return this._contentPromise;
-  }
-
-  async text(): Promise<string> {
-    const content = await this.buffer();
-    return content.toString('utf8');
-  }
-
-  async json(): Promise<object> {
-    const content = await this.text();
-    return JSON.parse(content);
-  }
-
-  request(): Request {
-    return this._request;
-  }
-
-  frame(): Frame | null {
-    return this._request.frame();
-  }
+function headersObject(headers: Protocol.Network.Headers): network.Headers {
+  const result: network.Headers = {};
+  for (const key of Object.keys(headers))
+    result[key.toLowerCase()] = headers[key];
+  return result;
 }
diff --git a/src/webkit/api.ts b/src/webkit/api.ts
index d7581d3759..a0424f3a15 100644
--- a/src/webkit/api.ts
+++ b/src/webkit/api.ts
@@ -8,7 +8,7 @@ export { ExecutionContext, JSHandle } from '../javascript';
 export { Frame } from './FrameManager';
 export { Mouse, Keyboard } from '../input';
 export { ElementHandle } from './JSHandle';
-export { Request, Response } from './NetworkManager';
+export { Request, Response } from '../network';
 export { ConsoleMessage, Page } from './Page';
 export { Playwright } from './Playwright';
 export { Target } from './Target';