diff --git a/src/server/browserType.ts b/src/server/browserType.ts
index cc9557bed1..a7c63a29fb 100644
--- a/src/server/browserType.ts
+++ b/src/server/browserType.ts
@@ -14,14 +14,22 @@
  * limitations under the License.
  */
 
+import * as fs from 'fs';
+import * as os from 'os';
+import * as path from 'path';
+import * as util from 'util';
 import { BrowserContext, PersistentContextOptions, validatePersistentContextOptions } from '../browserContext';
-import { BrowserServer } from './browserServer';
+import { BrowserServer, WebSocketWrapper } from './browserServer';
 import * as browserPaths from '../install/browserPaths';
-import { Logger, RootLogger } from '../logger';
+import { Logger, RootLogger, InnerLogger } from '../logger';
 import { ConnectionTransport, WebSocketTransport } from '../transport';
 import { BrowserBase, BrowserOptions, Browser } from '../browser';
 import { assert, helper } from '../helper';
 import { TimeoutSettings } from '../timeoutSettings';
+import { launchProcess, Env, waitForLine } from './processLauncher';
+import { Events } from '../events';
+import { TimeoutError } from '../errors';
+import { PipeTransport } from './pipeTransport';
 
 export type BrowserArgOptions = {
   headless?: boolean,
@@ -37,7 +45,7 @@ type LaunchOptionsBase = BrowserArgOptions & {
   handleSIGHUP?: boolean,
   timeout?: number,
   logger?: Logger,
-  env?: {[key: string]: string|number|boolean}
+  env?: Env,
 };
 
 export function processBrowserArgOptions(options: LaunchOptionsBase): { devtools: boolean, headless: boolean } {
@@ -45,7 +53,7 @@ export function processBrowserArgOptions(options: LaunchOptionsBase): { devtools
   return { devtools, headless };
 }
 
-export type ConnectOptions = {
+type ConnectOptions = {
   wsEndpoint: string,
   slowMo?: number,
   logger?: Logger,
@@ -53,7 +61,7 @@ export type ConnectOptions = {
 };
 export type LaunchType = 'local' | 'server' | 'persistent';
 export type LaunchOptions = LaunchOptionsBase & { slowMo?: number };
-export type LaunchServerOptions = LaunchOptionsBase & { port?: number };
+type LaunchServerOptions = LaunchOptionsBase & { port?: number };
 
 export interface BrowserType {
   executablePath(): string;
@@ -64,16 +72,20 @@ export interface BrowserType {
   connect(options: ConnectOptions): Promise<Browser>;
 }
 
+const mkdtempAsync = util.promisify(fs.mkdtemp);
+
 export abstract class BrowserTypeBase implements BrowserType {
   private _name: string;
   private _executablePath: string | undefined;
+  private _webSocketRegexNotPipe: RegExp | null;
   readonly _browserPath: string;
 
-  constructor(packagePath: string, browser: browserPaths.BrowserDescriptor) {
+  constructor(packagePath: string, browser: browserPaths.BrowserDescriptor, webSocketRegexNotPipe: RegExp | null) {
     this._name = browser.name;
     const browsersPath = browserPaths.browsersPath(packagePath);
     this._browserPath = browserPaths.browserDirectory(browsersPath, browser);
     this._executablePath = browserPaths.executablePath(this._browserPath, browser);
+    this._webSocketRegexNotPipe = webSocketRegexNotPipe;
   }
 
   executablePath(): string {
@@ -183,6 +195,88 @@ export abstract class BrowserTypeBase implements BrowserType {
     return this._connectToTransport(transport, { slowMo: options.slowMo, logger });
   }
 
-  abstract _launchServer(options: LaunchServerOptions, launchType: LaunchType, logger: RootLogger, deadline: number, userDataDir?: string): Promise<BrowserServer>;
+  private async _launchServer(options: LaunchServerOptions, launchType: LaunchType, logger: RootLogger, deadline: number, userDataDir?: string): Promise<BrowserServer> {
+    const {
+      ignoreDefaultArgs = false,
+      args = [],
+      executablePath = null,
+      env = process.env,
+      handleSIGINT = true,
+      handleSIGTERM = true,
+      handleSIGHUP = true,
+      port = 0,
+    } = options;
+    assert(!port || launchType === 'server', 'Cannot specify a port without launching as a server.');
+
+    let temporaryUserDataDir: string | null = null;
+    if (!userDataDir) {
+      userDataDir = await mkdtempAsync(path.join(os.tmpdir(), `playwright_${this._name}dev_profile-`));
+      temporaryUserDataDir = userDataDir;
+    }
+
+    const browserArguments = [];
+    if (!ignoreDefaultArgs)
+      browserArguments.push(...this._defaultArgs(options, launchType, userDataDir));
+    else if (Array.isArray(ignoreDefaultArgs))
+      browserArguments.push(...this._defaultArgs(options, launchType, userDataDir).filter(arg => ignoreDefaultArgs.indexOf(arg) === -1));
+    else
+      browserArguments.push(...args);
+
+    const executable = executablePath || this.executablePath();
+    if (!executable)
+      throw new Error(`No executable path is specified. Pass "executablePath" option directly.`);
+
+    // Note: it is important to define these variables before launchProcess, so that we don't get
+    // "Cannot access 'browserServer' before initialization" if something went wrong.
+    let transport: ConnectionTransport | undefined = undefined;
+    let browserServer: BrowserServer | undefined = undefined;
+    const { launchedProcess, gracefullyClose, downloadsPath } = await launchProcess({
+      executablePath: executable,
+      args: browserArguments,
+      env: this._amendEnvironment(env, userDataDir, executable, browserArguments),
+      handleSIGINT,
+      handleSIGTERM,
+      handleSIGHUP,
+      logger,
+      pipe: !this._webSocketRegexNotPipe,
+      tempDir: temporaryUserDataDir || undefined,
+      attemptToGracefullyClose: async () => {
+        if ((options as any).__testHookGracefullyClose)
+          await (options as any).__testHookGracefullyClose();
+        // We try to gracefully close to prevent crash reporting and core dumps.
+        // Note that it's fine to reuse the pipe transport, since
+        // our connection ignores kBrowserCloseMessageId.
+        this._attemptToGracefullyCloseBrowser(transport!);
+      },
+      onkill: (exitCode, signal) => {
+        if (browserServer)
+          browserServer.emit(Events.BrowserServer.Close, exitCode, signal);
+      },
+    });
+
+    try {
+      if (this._webSocketRegexNotPipe) {
+        const timeoutError = new TimeoutError(`Timed out while trying to connect to the browser!`);
+        const match = await waitForLine(launchedProcess, launchedProcess.stdout, this._webSocketRegexNotPipe, helper.timeUntilDeadline(deadline), timeoutError);
+        const innerEndpoint = match[1];
+        transport = await WebSocketTransport.connect(innerEndpoint, logger, deadline);
+      } else {
+        const stdio = launchedProcess.stdio as unknown as [NodeJS.ReadableStream, NodeJS.WritableStream, NodeJS.WritableStream, NodeJS.WritableStream, NodeJS.ReadableStream];
+        transport = new PipeTransport(stdio[3], stdio[4], logger);
+      }
+    } catch (e) {
+      // If we can't establish a connection, kill the process and exit.
+      helper.killProcess(launchedProcess);
+      throw e;
+    }
+    browserServer = new BrowserServer(options, launchedProcess, gracefullyClose, transport, downloadsPath,
+        launchType === 'server' ? this._wrapTransportWithWebSocket(transport, logger, port) : null);
+    return browserServer;
+  }
+
+  abstract _defaultArgs(options: BrowserArgOptions, launchType: LaunchType, userDataDir: string): string[];
   abstract _connectToTransport(transport: ConnectionTransport, options: BrowserOptions): Promise<BrowserBase>;
-}
\ No newline at end of file
+  abstract _wrapTransportWithWebSocket(transport: ConnectionTransport, logger: InnerLogger, port: number): WebSocketWrapper;
+  abstract _amendEnvironment(env: Env, userDataDir: string, executable: string, browserArguments: string[]): Env;
+  abstract _attemptToGracefullyCloseBrowser(transport: ConnectionTransport): void;
+}
diff --git a/src/server/chromium.ts b/src/server/chromium.ts
index 954b466df5..10a721fbab 100644
--- a/src/server/chromium.ts
+++ b/src/server/chromium.ts
@@ -15,21 +15,16 @@
  * limitations under the License.
  */
 
-import * as fs from 'fs';
-import * as os from 'os';
 import * as path from 'path';
-import * as util from 'util';
 import { helper, assert, isDebugMode } from '../helper';
 import { CRBrowser } from '../chromium/crBrowser';
 import * as ws from 'ws';
-import { launchProcess } from './processLauncher';
+import { Env } from './processLauncher';
 import { kBrowserCloseMessageId } from '../chromium/crConnection';
-import { PipeTransport } from './pipeTransport';
-import { BrowserArgOptions, LaunchServerOptions, BrowserTypeBase, processBrowserArgOptions, LaunchType } from './browserType';
-import { BrowserServer, WebSocketWrapper } from './browserServer';
-import { Events } from '../events';
+import { BrowserArgOptions, BrowserTypeBase, processBrowserArgOptions, LaunchType } from './browserType';
+import { WebSocketWrapper } from './browserServer';
 import { ConnectionTransport, ProtocolRequest } from '../transport';
-import { InnerLogger, logError, RootLogger } from '../logger';
+import { InnerLogger, logError } from '../logger';
 import { BrowserDescriptor } from '../install/browserPaths';
 import { CRDevTools } from '../chromium/crDevTools';
 import { BrowserOptions } from '../browser';
@@ -38,7 +33,7 @@ export class Chromium extends BrowserTypeBase {
   private _devtools: CRDevTools | undefined;
 
   constructor(packagePath: string, browser: BrowserDescriptor) {
-    super(packagePath, browser);
+    super(packagePath, browser, null /* use pipe not websocket */);
     if (isDebugMode())
       this._devtools = this._createDevTools();
   }
@@ -56,77 +51,22 @@ export class Chromium extends BrowserTypeBase {
     return CRBrowser.connect(transport, options, devtools);
   }
 
-  async _launchServer(options: LaunchServerOptions, launchType: LaunchType, logger: RootLogger, deadline: number, userDataDir?: string): Promise<BrowserServer> {
-    const {
-      ignoreDefaultArgs = false,
-      args = [],
-      executablePath = null,
-      env = process.env,
-      handleSIGINT = true,
-      handleSIGTERM = true,
-      handleSIGHUP = true,
-      port = 0,
-    } = options;
-    assert(!port || launchType === 'server', 'Cannot specify a port without launching as a server.');
-
-    let temporaryUserDataDir: string | null = null;
-    if (!userDataDir) {
-      userDataDir = await mkdtempAsync(CHROMIUM_PROFILE_PATH);
-      temporaryUserDataDir = userDataDir;
-    }
-
+  _amendEnvironment(env: Env, userDataDir: string, executable: string, browserArguments: string[]): Env {
     const runningAsRoot = process.geteuid && process.geteuid() === 0;
-    assert(!runningAsRoot || args.includes('--no-sandbox'), 'Cannot launch Chromium as root without --no-sandbox. See https://crbug.com/638180.');
-
-    const chromeArguments = [];
-    if (!ignoreDefaultArgs)
-      chromeArguments.push(...this._defaultArgs(options, launchType, userDataDir));
-    else if (Array.isArray(ignoreDefaultArgs))
-      chromeArguments.push(...this._defaultArgs(options, launchType, userDataDir).filter(arg => ignoreDefaultArgs.indexOf(arg) === -1));
-    else
-      chromeArguments.push(...args);
-
-    const chromeExecutable = executablePath || this.executablePath();
-    if (!chromeExecutable)
-      throw new Error(`No executable path is specified. Pass "executablePath" option directly.`);
-
-    // Note: it is important to define these variables before launchProcess, so that we don't get
-    // "Cannot access 'browserServer' before initialization" if something went wrong.
-    let transport: PipeTransport | undefined = undefined;
-    let browserServer: BrowserServer | undefined = undefined;
-    const { launchedProcess, gracefullyClose, downloadsPath } = await launchProcess({
-      executablePath: chromeExecutable,
-      args: chromeArguments,
-      env,
-      handleSIGINT,
-      handleSIGTERM,
-      handleSIGHUP,
-      logger,
-      pipe: true,
-      tempDir: temporaryUserDataDir || undefined,
-      attemptToGracefullyClose: async () => {
-        if ((options as any).__testHookGracefullyClose)
-          await (options as any).__testHookGracefullyClose();
-        // We try to gracefully close to prevent crash reporting and core dumps.
-        // Note that it's fine to reuse the pipe transport, since
-        // our connection ignores kBrowserCloseMessageId.
-        const t = transport!;
-        const message: ProtocolRequest = { method: 'Browser.close', id: kBrowserCloseMessageId, params: {} };
-        t.send(message);
-      },
-      onkill: (exitCode, signal) => {
-        if (browserServer)
-          browserServer.emit(Events.BrowserServer.Close, exitCode, signal);
-      },
-    });
-
-    const stdio = launchedProcess.stdio as unknown as [NodeJS.ReadableStream, NodeJS.WritableStream, NodeJS.WritableStream, NodeJS.WritableStream, NodeJS.ReadableStream];
-    transport = new PipeTransport(stdio[3], stdio[4], logger);
-    browserServer = new BrowserServer(options, launchedProcess, gracefullyClose, transport, downloadsPath, launchType === 'server' ? wrapTransportWithWebSocket(transport, logger, port) : null);
-    return browserServer;
+    assert(!runningAsRoot || browserArguments.includes('--no-sandbox'), 'Cannot launch Chromium as root without --no-sandbox. See https://crbug.com/638180.');
+    return env;
   }
 
-  private _defaultArgs(options: BrowserArgOptions = {}, launchType: LaunchType, userDataDir: string): string[] {
+  _attemptToGracefullyCloseBrowser(transport: ConnectionTransport): void {
+    const message: ProtocolRequest = { method: 'Browser.close', id: kBrowserCloseMessageId, params: {} };
+    transport.send(message);
+  }
+
+  _wrapTransportWithWebSocket(transport: ConnectionTransport, logger: InnerLogger, port: number): WebSocketWrapper {
+    return wrapTransportWithWebSocket(transport, logger, port);
+  }
+
+  _defaultArgs(options: BrowserArgOptions, launchType: LaunchType, userDataDir: string): string[] {
     const { devtools, headless } = processBrowserArgOptions(options);
     const { args = [] } = options;
     const userDataDirArg = args.find(arg => arg.startsWith('--user-data-dir'));
@@ -301,10 +241,6 @@ function wrapTransportWithWebSocket(transport: ConnectionTransport, logger: Inne
 }
 
 
-const mkdtempAsync = util.promisify(fs.mkdtemp);
-
-const CHROMIUM_PROFILE_PATH = path.join(os.tmpdir(), 'playwright_dev_profile-');
-
 const DEFAULT_ARGS = [
   '--disable-background-networking',
   '--enable-features=NetworkService,NetworkServiceInProcess',
diff --git a/src/server/firefox.ts b/src/server/firefox.ts
index 702fae2134..2157afaa50 100644
--- a/src/server/firefox.ts
+++ b/src/server/firefox.ts
@@ -15,112 +15,48 @@
  * limitations under the License.
  */
 
-import * as fs from 'fs';
 import * as os from 'os';
 import * as path from 'path';
-import * as util from 'util';
 import * as ws from 'ws';
-import { TimeoutError } from '../errors';
-import { Events } from '../events';
 import { FFBrowser } from '../firefox/ffBrowser';
 import { kBrowserCloseMessageId } from '../firefox/ffConnection';
-import { helper, assert } from '../helper';
-import { BrowserServer, WebSocketWrapper } from './browserServer';
-import { BrowserArgOptions, LaunchServerOptions, BrowserTypeBase, processBrowserArgOptions, LaunchType } from './browserType';
-import { launchProcess, waitForLine } from './processLauncher';
-import { ConnectionTransport, SequenceNumberMixer, WebSocketTransport } from '../transport';
-import { InnerLogger, logError, RootLogger } from '../logger';
+import { helper } from '../helper';
+import { WebSocketWrapper } from './browserServer';
+import { BrowserArgOptions, BrowserTypeBase, processBrowserArgOptions, LaunchType } from './browserType';
+import { Env } from './processLauncher';
+import { ConnectionTransport, SequenceNumberMixer } from '../transport';
+import { InnerLogger, logError } from '../logger';
 import { BrowserOptions } from '../browser';
-
-const mkdtempAsync = util.promisify(fs.mkdtemp);
+import { BrowserDescriptor } from '../install/browserPaths';
 
 export class Firefox extends BrowserTypeBase {
+  constructor(packagePath: string, browser: BrowserDescriptor) {
+    const websocketRegex = /^Juggler listening on (ws:\/\/.*)$/;
+    super(packagePath, browser, websocketRegex /* use websocket not pipe */);
+  }
+
   _connectToTransport(transport: ConnectionTransport, options: BrowserOptions): Promise<FFBrowser> {
     return FFBrowser.connect(transport, options);
   }
 
-  async _launchServer(options: LaunchServerOptions, launchType: LaunchType, logger: RootLogger, deadline: number, userDataDir?: string): Promise<BrowserServer> {
-    const {
-      ignoreDefaultArgs = false,
-      args = [],
-      executablePath = null,
-      env = process.env,
-      handleSIGHUP = true,
-      handleSIGINT = true,
-      handleSIGTERM = true,
-      timeout = 30000,
-      port = 0,
-    } = options;
-    assert(!port || launchType === 'server', 'Cannot specify a port without launching as a server.');
-
-    let temporaryProfileDir = null;
-    if (!userDataDir) {
-      userDataDir = await mkdtempAsync(path.join(os.tmpdir(), 'playwright_dev_firefox_profile-'));
-      temporaryProfileDir = userDataDir;
-    }
-
-    const firefoxArguments = [];
-    if (!ignoreDefaultArgs)
-      firefoxArguments.push(...this._defaultArgs(options, launchType, userDataDir, 0));
-    else if (Array.isArray(ignoreDefaultArgs))
-      firefoxArguments.push(...this._defaultArgs(options, launchType, userDataDir, 0).filter(arg => !ignoreDefaultArgs.includes(arg)));
-    else
-      firefoxArguments.push(...args);
-
-    const firefoxExecutable = executablePath || this.executablePath();
-    if (!firefoxExecutable)
-      throw new Error(`No executable path is specified. Pass "executablePath" option directly.`);
-
-    // Note: it is important to define these variables before launchProcess, so that we don't get
-    // "Cannot access 'transport' before initialization" if something went wrong.
-    let browserServer: BrowserServer | undefined = undefined;
-    let transport: ConnectionTransport | undefined = undefined;
-    const { launchedProcess, gracefullyClose, downloadsPath } = await launchProcess({
-      executablePath: firefoxExecutable,
-      args: firefoxArguments,
-      env: os.platform() === 'linux' ? {
-        ...env,
-        // On linux Juggler ships the libstdc++ it was linked against.
-        LD_LIBRARY_PATH: `${path.dirname(firefoxExecutable)}:${process.env.LD_LIBRARY_PATH}`,
-      } : env,
-      handleSIGINT,
-      handleSIGTERM,
-      handleSIGHUP,
-      logger,
-      pipe: false,
-      tempDir: temporaryProfileDir || undefined,
-      attemptToGracefullyClose: async () => {
-        if ((options as any).__testHookGracefullyClose)
-          await (options as any).__testHookGracefullyClose();
-
-        // We try to gracefully close to prevent crash reporting and core dumps.
-        const message = { method: 'Browser.close', params: {}, id: kBrowserCloseMessageId };
-        transport!.send(message);
-      },
-      onkill: (exitCode, signal) => {
-        if (browserServer)
-          browserServer.emit(Events.BrowserServer.Close, exitCode, signal);
-      },
-    });
-
-    const timeoutError = new TimeoutError(`Timed out after ${timeout} ms while trying to connect to Firefox!`);
-    const match = await waitForLine(launchedProcess, launchedProcess.stdout, /^Juggler listening on (ws:\/\/.*)$/, timeout, timeoutError);
-    const innerEndpoint = match[1];
-
-    try {
-      // If we can't communicate with Firefox on start, kill the process and exit.
-      transport = await WebSocketTransport.connect(innerEndpoint, logger, deadline);
-    } catch (e) {
-      helper.killProcess(launchedProcess);
-      throw e;
-    }
-
-    const webSocketWrapper = launchType === 'server' ? wrapTransportWithWebSocket(transport, logger, port) : null;
-    browserServer = new BrowserServer(options, launchedProcess, gracefullyClose, transport, downloadsPath, webSocketWrapper);
-    return browserServer;
+  _amendEnvironment(env: Env, userDataDir: string, executable: string, browserArguments: string[]): Env {
+    return os.platform() === 'linux' ? {
+      ...env,
+      // On linux Juggler ships the libstdc++ it was linked against.
+      LD_LIBRARY_PATH: `${path.dirname(executable)}:${process.env.LD_LIBRARY_PATH}`,
+    } : env;
   }
 
-  private _defaultArgs(options: BrowserArgOptions = {}, launchType: LaunchType, userDataDir: string, port: number): string[] {
+  _attemptToGracefullyCloseBrowser(transport: ConnectionTransport): void {
+    const message = { method: 'Browser.close', params: {}, id: kBrowserCloseMessageId };
+    transport.send(message);
+  }
+
+  _wrapTransportWithWebSocket(transport: ConnectionTransport, logger: InnerLogger, port: number): WebSocketWrapper {
+    return wrapTransportWithWebSocket(transport, logger, port);
+  }
+
+  _defaultArgs(options: BrowserArgOptions, launchType: LaunchType, userDataDir: string): string[] {
     const { devtools, headless } = processBrowserArgOptions(options);
     const { args = [] } = options;
     if (devtools)
@@ -139,7 +75,7 @@ export class Firefox extends BrowserTypeBase {
       firefoxArguments.push('-foreground');
     }
     firefoxArguments.push(`-profile`, userDataDir);
-    firefoxArguments.push('-juggler', String(port));
+    firefoxArguments.push('-juggler', '0');
     firefoxArguments.push(...args);
     if (launchType === 'persistent')
       firefoxArguments.push('about:blank');
diff --git a/src/server/processLauncher.ts b/src/server/processLauncher.ts
index cfb06c860d..73c283ed98 100644
--- a/src/server/processLauncher.ts
+++ b/src/server/processLauncher.ts
@@ -44,10 +44,12 @@ const browserStdErrLog: Log = {
   severity: 'warning'
 };
 
+export type Env = {[key: string]: string | number | boolean | undefined};
+
 export type LaunchProcessOptions = {
   executablePath: string,
   args: string[],
-  env?: {[key: string]: string | number | boolean | undefined},
+  env?: Env,
 
   handleSIGINT?: boolean,
   handleSIGTERM?: boolean,
diff --git a/src/server/webkit.ts b/src/server/webkit.ts
index 04768bc4e5..da093a8dfa 100644
--- a/src/server/webkit.ts
+++ b/src/server/webkit.ts
@@ -16,93 +16,40 @@
  */
 
 import { WKBrowser } from '../webkit/wkBrowser';
-import { PipeTransport } from './pipeTransport';
-import { launchProcess } from './processLauncher';
-import * as fs from 'fs';
+import { Env } from './processLauncher';
 import * as path from 'path';
-import * as os from 'os';
-import * as util from 'util';
-import { helper, assert } from '../helper';
+import { helper } from '../helper';
 import { kBrowserCloseMessageId } from '../webkit/wkConnection';
-import { BrowserArgOptions, LaunchServerOptions, BrowserTypeBase, processBrowserArgOptions, LaunchType } from './browserType';
+import { BrowserArgOptions, BrowserTypeBase, processBrowserArgOptions, LaunchType } from './browserType';
 import { ConnectionTransport, SequenceNumberMixer } from '../transport';
 import * as ws from 'ws';
-import { BrowserServer, WebSocketWrapper } from './browserServer';
-import { Events } from '../events';
-import { InnerLogger, logError, RootLogger } from '../logger';
+import { WebSocketWrapper } from './browserServer';
+import { InnerLogger, logError } from '../logger';
 import { BrowserOptions } from '../browser';
+import { BrowserDescriptor } from '../install/browserPaths';
 
 export class WebKit extends BrowserTypeBase {
+  constructor(packagePath: string, browser: BrowserDescriptor) {
+    super(packagePath, browser, null /* use pipe not websocket */);
+  }
+
   _connectToTransport(transport: ConnectionTransport, options: BrowserOptions): Promise<WKBrowser> {
     return WKBrowser.connect(transport, options);
   }
 
-  async _launchServer(options: LaunchServerOptions, launchType: LaunchType, logger: RootLogger, deadline: number, userDataDir?: string): Promise<BrowserServer> {
-    const {
-      ignoreDefaultArgs = false,
-      args = [],
-      executablePath = null,
-      env = process.env,
-      handleSIGINT = true,
-      handleSIGTERM = true,
-      handleSIGHUP = true,
-      port = 0,
-    } = options;
-    assert(!port || launchType === 'server', 'Cannot specify a port without launching as a server.');
-
-    let temporaryUserDataDir: string | null = null;
-    if (!userDataDir) {
-      userDataDir = await mkdtempAsync(WEBKIT_PROFILE_PATH);
-      temporaryUserDataDir = userDataDir;
-    }
-
-    const webkitArguments = [];
-    if (!ignoreDefaultArgs)
-      webkitArguments.push(...this._defaultArgs(options, launchType, userDataDir, port));
-    else if (Array.isArray(ignoreDefaultArgs))
-      webkitArguments.push(...this._defaultArgs(options, launchType, userDataDir, port).filter(arg => ignoreDefaultArgs.indexOf(arg) === -1));
-    else
-      webkitArguments.push(...args);
-
-    const webkitExecutable = executablePath || this.executablePath();
-    if (!webkitExecutable)
-      throw new Error(`No executable path is specified.`);
-
-    // Note: it is important to define these variables before launchProcess, so that we don't get
-    // "Cannot access 'browserServer' before initialization" if something went wrong.
-    let transport: ConnectionTransport | undefined = undefined;
-    let browserServer: BrowserServer | undefined = undefined;
-    const { launchedProcess, gracefullyClose, downloadsPath } = await launchProcess({
-      executablePath: webkitExecutable,
-      args: webkitArguments,
-      env: { ...env, CURL_COOKIE_JAR_PATH: path.join(userDataDir, 'cookiejar.db') },
-      handleSIGINT,
-      handleSIGTERM,
-      handleSIGHUP,
-      logger,
-      pipe: true,
-      tempDir: temporaryUserDataDir || undefined,
-      attemptToGracefullyClose: async () => {
-        if ((options as any).__testHookGracefullyClose)
-          await (options as any).__testHookGracefullyClose();
-        // We try to gracefully close to prevent crash reporting and core dumps.
-        // Note that it's fine to reuse the pipe transport, since
-        // our connection ignores kBrowserCloseMessageId.
-        transport!.send({method: 'Playwright.close', params: {}, id: kBrowserCloseMessageId});
-      },
-      onkill: (exitCode, signal) => {
-        if (browserServer)
-          browserServer.emit(Events.BrowserServer.Close, exitCode, signal);
-      },
-    });
-
-    const stdio = launchedProcess.stdio as unknown as [NodeJS.ReadableStream, NodeJS.WritableStream, NodeJS.WritableStream, NodeJS.WritableStream, NodeJS.ReadableStream];
-    transport = new PipeTransport(stdio[3], stdio[4], logger);
-    browserServer = new BrowserServer(options, launchedProcess, gracefullyClose, transport, downloadsPath, launchType === 'server' ? wrapTransportWithWebSocket(transport, logger, port || 0) : null);
-    return browserServer;
+  _amendEnvironment(env: Env, userDataDir: string, executable: string, browserArguments: string[]): Env {
+    return { ...env, CURL_COOKIE_JAR_PATH: path.join(userDataDir, 'cookiejar.db') };
   }
 
-  _defaultArgs(options: BrowserArgOptions = {}, launchType: LaunchType, userDataDir: string, port: number): string[] {
+  _attemptToGracefullyCloseBrowser(transport: ConnectionTransport): void {
+    transport.send({method: 'Playwright.close', params: {}, id: kBrowserCloseMessageId});
+  }
+
+  _wrapTransportWithWebSocket(transport: ConnectionTransport, logger: InnerLogger, port: number): WebSocketWrapper {
+    return wrapTransportWithWebSocket(transport, logger, port);
+  }
+
+  _defaultArgs(options: BrowserArgOptions, launchType: LaunchType, userDataDir: string): string[] {
     const { devtools, headless } = processBrowserArgOptions(options);
     const { args = [] } = options;
     if (devtools)
@@ -126,10 +73,6 @@ export class WebKit extends BrowserTypeBase {
   }
 }
 
-const mkdtempAsync = util.promisify(fs.mkdtemp);
-
-const WEBKIT_PROFILE_PATH = path.join(os.tmpdir(), 'playwright_dev_profile-');
-
 function wrapTransportWithWebSocket(transport: ConnectionTransport, logger: InnerLogger, port: number): WebSocketWrapper {
   const server = new ws.Server({ port });
   const guid = helper.guid();