chore: mark 0.0.34 (#901)

Fixes https://github.com/microsoft/playwright-mcp/issues/869

.github/workflows/ci.yml

@@ -28,7 +28,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest]
+        os: [ubuntu-latest, macos-15, windows-latest]
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v4

.github/workflows/publish.yml

@@ -68,3 +68,31 @@ jobs:
           for tag in $(echo ${{ steps.build-push.outputs.metadata['image.name'] }} | tr ',' '\n'); do
             attach_eol_manifest $tag
           done
+
+  package-extension:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write # Needed to upload release assets
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: 'npm'
+      - name: Install extension dependencies
+        working-directory: ./extension
+        run: npm ci
+      - name: Build extension
+        working-directory: ./extension
+        run: npm run build
+      - name: Package extension
+        working-directory: ./extension
+        run: |
+          cd dist
+          zip -r ../playwright-mcp-extension-${{ github.event.release.tag_name }}.zip .
+          cd ..
+      - name: Upload extension to release
+        env:
+           GITHUB_TOKEN: ${{ github.token }}
+        run: |
+            gh release upload ${{github.event.release.tag_name}} ./extension/playwright-mcp-extension-${{ github.event.release.tag_name }}.zip

README.md

@@ -100,6 +100,29 @@ Go to `Advanced settings` -> `Extensions` -> `Add custom extension`. Name to you
 Go to `Program` in the right sidebar -> `Install` -> `Edit mcp.json`. Use the standard config above.
 </details>
 
+<details>
+<summary>opencode</summary>
+
+Follow the MCP Servers [documentation](https://opencode.ai/docs/mcp-servers/). For example in `~/.config/opencode/opencode.json`:
+
+```json
+{
+  "$schema": "https://opencode.ai/config.json",
+  "mcp": {
+    "playwright": {
+      "type": "local",
+      "command": [
+        "npx",
+        "@playwright/mcp@latest"
+      ],
+      "enabled": true
+    }
+  }
+}
+
+```
+</details>
+
 <details>
 <summary>Qodo Gen</summary>
 
@@ -158,6 +181,9 @@ Playwright MCP server supports following arguments. They can be provided in the
   --config <path>              path to the configuration file.
   --device <device>            device to emulate, for example: "iPhone 15"
   --executable-path <path>     path to the browser executable.
+  --extension                  Connect to a running browser instance
+                               (Edge/Chrome only). Requires the "Playwright MCP
+                               Bridge" browser extension to be installed.
   --headless                   run browser in headless mode, headed by default
   --host <host>                host to bind server to. Default is localhost. Use
                                0.0.0.0 to bind to all interfaces.
@@ -191,7 +217,7 @@ Playwright MCP server supports following arguments. They can be provided in the
 
 ### User profile
 
-You can run Playwright MCP with persistent profile like a regular browser (default), or in the isolated contexts for the testing sessions.
+You can run Playwright MCP with persistent profile like a regular browser (default), in isolated contexts for testing sessions, or connect to your existing browser using the browser extension.
 
 **Persistent profile**
 
@@ -231,6 +257,10 @@ state [here](https://playwright.dev/docs/auth).
 }
 ```
 
+**Browser Extension**
+
+The Playwright MCP Chrome Extension allows you to connect to existing browser tabs and leverage your logged-in sessions and browser state. See [extension/README.md](extension/README.md) for installation and setup instructions.
+
 ### Configuration file
 
 The Playwright MCP server can be configured using a JSON configuration file. You can specify the configuration file

extension/README.md

@@ -0,0 +1,48 @@
+# Playwright MCP Chrome Extension
+
+## Introduction
+
+The Playwright MCP Chrome Extension allows you to connect to pages in your existing browser and leverage the state of your default user profile. This means the AI assistant can interact with websites where you're already logged in, using your existing cookies, sessions, and browser state, providing a seamless experience without requiring separate authentication or setup.
+
+## Prerequisites
+
+- Chrome/Edge/Chromium browser
+
+## Installation Steps
+
+### Download the Extension
+
+Download the latest Chrome extension from GitHub:
+- **Download link**: https://github.com/microsoft/playwright-mcp/releases
+
+### Load Chrome Extension
+
+1. Open Chrome and navigate to `chrome://extensions/`
+2. Enable "Developer mode" (toggle in the top right corner)
+3. Click "Load unpacked" and select the extension directory
+
+### Configure Playwright MCP server
+
+Configure Playwright MCP server to connect to the browser using the extension by passing the `--extension` option when running the MCP server:
+
+```json
+{
+  "mcpServers": {
+    "playwright-extension": {
+      "command": "npx",
+      "args": [
+        "@playwright/mcp@latest",
+        "--extension"
+      ]
+    }
+  }
+}
+```
+
+## Usage
+
+### Browser Tab Selection
+
+When the LLM interacts with the browser for the first time, it will load a page where you can select which browser tab the LLM will connect to. This allows you to control which specific page the AI assistant will interact with during the session.
+
+

extension/manifest.json

@@ -1,7 +1,7 @@
 {
   "manifest_version": 3,
   "name": "Playwright MCP Bridge",
-  "version": "1.0.0",
+  "version": "0.0.34",
   "description": "Share browser tabs with Playwright MCP server",
   "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA9nMS2b0WCohjVHPGb8D9qAdkbIngDqoAjTeSccHJijgcONejge+OJxOQOMLu7b0ovt1c9BiEJa5JcpM+EHFVGL1vluBxK71zmBy1m2f9vZF3HG0LSCp7YRkum9rAIEthDwbkxx6XTvpmAY5rjFa/NON6b9Hlbo+8peUSkoOK7HTwYnnI36asZ9eUTiveIf+DMPLojW2UX33vDWG2UKvMVDewzclb4+uLxAYshY7Mx8we/b44xu+Anb/EBLKjOPk9Yh541xJ5Ozc8EiP/5yxOp9c/lRiYUHaRW+4r0HKZyFt0eZ52ti2iM4Nfk7jRXR7an3JPsUIf5deC/1cVM/+1ZQIDAQAB",
 

extension/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "@playwright/mcp-extension",
-  "version": "0.0.32",
+  "version": "0.0.34",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@playwright/mcp-extension",
-      "version": "0.0.32",
+      "version": "0.0.34",
       "license": "Apache-2.0",
       "devDependencies": {
         "@types/chrome": "^0.0.315",

extension/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@playwright/mcp-extension",
-  "version": "0.0.32",
+  "version": "0.0.34",
   "description": "Playwright MCP Browser Extension",
   "type": "module",
   "private": true,

extension/src/background.ts

@@ -26,6 +26,10 @@ type PageMessage = {
   tabId: number;
   windowId: number;
   mcpRelayUrl: string;
+} | {
+  type: 'getConnectionStatus';
+} | {
+  type: 'disconnect';
 };
 
 class TabShareExtension {
@@ -38,6 +42,7 @@ class TabShareExtension {
     chrome.tabs.onUpdated.addListener(this._onTabUpdated.bind(this));
     chrome.tabs.onActivated.addListener(this._onTabActivated.bind(this));
     chrome.runtime.onMessage.addListener(this._onMessage.bind(this));
+    chrome.action.onClicked.addListener(this._onActionClicked.bind(this));
   }
 
   // Promise-based message handling is not supported in Chrome: https://issues.chromium.org/issues/40753031
@@ -58,6 +63,16 @@ class TabShareExtension {
             () => sendResponse({ success: true }),
             (error: any) => sendResponse({ success: false, error: error.message }));
         return true; // Return true to indicate that the response will be sent asynchronously
+      case 'getConnectionStatus':
+        sendResponse({
+          connectedTabId: this._connectedTabId
+        });
+        return false;
+      case 'disconnect':
+        this._disconnect().then(
+            () => sendResponse({ success: true }),
+            (error: any) => sendResponse({ success: false, error: error.message }));
+        return true;
     }
     return false;
   }
@@ -125,14 +140,15 @@ class TabShareExtension {
     const oldTabId = this._connectedTabId;
     this._connectedTabId = tabId;
     if (oldTabId && oldTabId !== tabId)
-      await this._updateBadge(oldTabId, { text: '', color: null });
+      await this._updateBadge(oldTabId, { text: '' });
     if (tabId)
-      await this._updateBadge(tabId, { text: '●', color: '#4CAF50' });
+      await this._updateBadge(tabId, { text: '✓', color: '#4CAF50', title: 'Connected to MCP client' });
   }
 
-  private async _updateBadge(tabId: number, { text, color }: { text: string; color: string | null }): Promise<void> {
+  private async _updateBadge(tabId: number, { text, color, title }: { text: string; color?: string, title?: string }): Promise<void> {
     try {
       await chrome.action.setBadgeText({ tabId, text });
+      await chrome.action.setTitle({ tabId, title: title || '' });
       if (color)
         await chrome.action.setBadgeBackgroundColor({ tabId, color });
     } catch (error: any) {
@@ -177,7 +193,7 @@ class TabShareExtension {
   }
 
   private _onTabUpdated(tabId: number, changeInfo: chrome.tabs.TabChangeInfo, tab: chrome.tabs.Tab) {
-    if (changeInfo.status === 'complete' && this._connectedTabId === tabId)
+    if (this._connectedTabId === tabId)
       void this._setConnectedTabId(tabId);
   }
 
@@ -185,6 +201,19 @@ class TabShareExtension {
     const tabs = await chrome.tabs.query({});
     return tabs.filter(tab => tab.url && !['chrome:', 'edge:', 'devtools:'].some(scheme => tab.url!.startsWith(scheme)));
   }
+
+  private async _onActionClicked(): Promise<void> {
+    await chrome.tabs.create({
+      url: chrome.runtime.getURL('status.html'),
+      active: true
+    });
+  }
+
+  private async _disconnect(): Promise<void> {
+    this._activeConnection?.close('User disconnected');
+    this._activeConnection = undefined;
+    await this._setConnectedTabId(null);
+  }
 }
 
 new TabShareExtension();

extension/src/ui/connect.html

@@ -18,6 +18,8 @@
 <head>
   <title>Playwright MCP extension</title>
   <meta name="viewport" content="width=device-width, initial-scale=1">
+  <link rel="icon" type="image/png" sizes="32x32" href="../../icons/icon-32.png">
+  <link rel="icon" type="image/png" sizes="16x16" href="../../icons/icon-16.png">
   <link rel="stylesheet" href="connect.css">
 </head>
 <body>

extension/src/ui/connect.tsx

@@ -16,14 +16,8 @@
 
 import React, { useState, useEffect, useCallback } from 'react';
 import { createRoot } from 'react-dom/client';
-
-interface TabInfo {
-  id: number;
-  windowId: number;
-  title: string;
-  url: string;
-  favIconUrl?: string;
-}
+import { Button, TabItem  } from './tabItem.js';
+import type { TabInfo } from './tabItem.js';
 
 type StatusType = 'connected' | 'error' | 'connecting';
 
@@ -147,7 +141,11 @@ const ConnectApp: React.FC = () => {
                 <TabItem
                   key={tab.id}
                   tab={tab}
-                  onConnect={() => handleConnectToTab(tab)}
+                  button={
+                    <Button variant='primary' onClick={() => handleConnectToTab(tab)}>
+                      Connect
+                    </Button>
+                  }
                 />
               ))}
             </div>
@@ -162,41 +160,6 @@ const StatusBanner: React.FC<{ type: StatusType; message: string }> = ({ type, m
   return <div className={`status-banner ${type}`}>{message}</div>;
 };
 
-const Button: React.FC<{ variant: 'primary' | 'default' | 'reject'; onClick: () => void; children: React.ReactNode }> = ({
-  variant,
-  onClick,
-  children
-}) => {
-  return (
-    <button className={`button ${variant}`} onClick={onClick}>
-      {children}
-    </button>
-  );
-};
-
-const TabItem: React.FC<{ tab: TabInfo; onConnect: () => void }> = ({
-  tab,
-  onConnect
-}) => {
-  return (
-    <div className='tab-item'>
-      <img
-        src={tab.favIconUrl || 'data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16"><rect width="16" height="16" fill="%23f6f8fa"/></svg>'}
-        alt=''
-        className='tab-favicon'
-      />
-      <div className='tab-content'>
-        <div className='tab-title'>{tab.title || 'Untitled'}</div>
-        <div className='tab-url'>{tab.url}</div>
-      </div>
-      <Button variant='primary' onClick={onConnect}>
-        Connect
-      </Button>
-    </div>
-  );
-};
-
-
 // Initialize the React app
 const container = document.getElementById('root');
 if (container) {

extension/src/ui/status.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>Playwright MCP Bridge Status</title>
+  <link rel="stylesheet" href="connect.css">
+</head>
+<body>
+  <div id="root"></div>
+  <script src="status.tsx" type="module"></script>
+</body>
+</html>

extension/src/ui/status.tsx

@@ -0,0 +1,110 @@
+/**
+ * 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 React, { useState, useEffect } from 'react';
+import { createRoot } from 'react-dom/client';
+import { Button, TabItem  } from './tabItem.js';
+
+import type { TabInfo } from './tabItem.js';
+
+interface ConnectionStatus {
+  isConnected: boolean;
+  connectedTabId: number | null;
+  connectedTab?: TabInfo;
+}
+
+const StatusApp: React.FC = () => {
+  const [status, setStatus] = useState<ConnectionStatus>({
+    isConnected: false,
+    connectedTabId: null
+  });
+
+  useEffect(() => {
+    void loadStatus();
+  }, []);
+
+  const loadStatus = async () => {
+    // Get current connection status from background script
+    const { connectedTabId } = await chrome.runtime.sendMessage({ type: 'getConnectionStatus' });
+    if (connectedTabId) {
+      const tab = await chrome.tabs.get(connectedTabId);
+      setStatus({
+        isConnected: true,
+        connectedTabId,
+        connectedTab: {
+          id: tab.id!,
+          windowId: tab.windowId!,
+          title: tab.title!,
+          url: tab.url!,
+          favIconUrl: tab.favIconUrl
+        }
+      });
+    } else {
+      setStatus({
+        isConnected: false,
+        connectedTabId: null
+      });
+    }
+  };
+
+  const openConnectedTab = async () => {
+    if (!status.connectedTabId)
+      return;
+    await chrome.tabs.update(status.connectedTabId, { active: true });
+    window.close();
+  };
+
+  const disconnect = async () => {
+    await chrome.runtime.sendMessage({ type: 'disconnect' });
+    window.close();
+  };
+
+  return (
+    <div className='app-container'>
+      <div className='content-wrapper'>
+        {status.isConnected && status.connectedTab ? (
+          <div>
+            <div className='tab-section-title'>
+              Page with connected MCP client:
+            </div>
+            <div>
+              <TabItem
+                tab={status.connectedTab}
+                button={
+                  <Button variant='primary' onClick={disconnect}>
+                    Disconnect
+                  </Button>
+                }
+                onClick={openConnectedTab}
+              />
+            </div>
+          </div>
+        ) : (
+          <div className='status-banner'>
+            No MCP clients are currently connected.
+          </div>
+        )}
+      </div>
+    </div>
+  );
+};
+
+// Initialize the React app
+const container = document.getElementById('root');
+if (container) {
+  const root = createRoot(container);
+  root.render(<StatusApp />);
+}

extension/src/ui/tabItem.tsx

@@ -0,0 +1,67 @@
+/**
+ * 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 React from 'react';
+
+export interface TabInfo {
+  id: number;
+  windowId: number;
+  title: string;
+  url: string;
+  favIconUrl?: string;
+}
+
+export const Button: React.FC<{ variant: 'primary' | 'default' | 'reject'; onClick: () => void; children: React.ReactNode }> = ({
+  variant,
+  onClick,
+  children
+}) => {
+  return (
+    <button className={`button ${variant}`} onClick={onClick}>
+      {children}
+    </button>
+  );
+};
+
+
+export interface TabItemProps {
+  tab: TabInfo;
+  onClick?: () => void;
+  button?: React.ReactNode;
+}
+
+export const TabItem: React.FC<TabItemProps> = ({
+  tab,
+  onClick,
+  button
+}) => {
+  return (
+    <div className='tab-item' onClick={onClick} style={onClick ? { cursor: 'pointer' } : undefined}>
+      <img
+        src={tab.favIconUrl || 'data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16"><rect width="16" height="16" fill="%23f6f8fa"/></svg>'}
+        alt=''
+        className='tab-favicon'
+      />
+      <div className='tab-content'>
+        <div className='tab-title'>
+          {tab.title || 'Untitled'}
+        </div>
+        <div className='tab-url'>{tab.url}</div>
+      </div>
+      {button}
+    </div>
+  );
+};

extension/tests/extension.spec.ts

@@ -19,10 +19,12 @@ import { chromium } from 'playwright';
 import { test as base, expect } from '../../tests/fixtures.js';
 
 import type { BrowserContext } from 'playwright';
+import type { Client } from '@modelcontextprotocol/sdk/client/index.js';
+import type { StartClient } from '../../tests/fixtures.js';
 
 type BrowserWithExtension = {
   userDataDir: string;
-  launch: () => Promise<BrowserContext>;
+  launch: (mode?: 'disable-extension') => Promise<BrowserContext>;
 };
 
 const test = base.extend<{ browserWithExtension: BrowserWithExtension }>({
@@ -37,14 +39,14 @@ const test = base.extend<{ browserWithExtension: BrowserWithExtension }>({
     const userDataDir = testInfo.outputPath('extension-user-data-dir');
     await use({
       userDataDir,
-      launch: async () => {
+      launch: async (mode?: 'disable-extension') => {
         browserContext = await chromium.launchPersistentContext(userDataDir, {
           channel: mcpBrowser,
           // Opening the browser singleton only works in headed.
           headless: false,
           // Automation disables singleton browser process behavior, which is necessary for the extension.
           ignoreDefaultArgs: ['--enable-automation'],
-          args: [
+          args: mode === 'disable-extension' ? [] : [
             `--disable-extensions-except=${pathToExtension}`,
             `--load-extension=${pathToExtension}`,
           ],
@@ -63,9 +65,7 @@ const test = base.extend<{ browserWithExtension: BrowserWithExtension }>({
   },
 });
 
-test('navigate with extension', async ({ browserWithExtension, startClient, server }) => {
-  const browserContext = await browserWithExtension.launch();
-
+async function startAndCallConnectTool(browserWithExtension: BrowserWithExtension, startClient: StartClient): Promise<Client> {
   const { client } = await startClient({
     args: [`--connect-tool`],
     config: {
@@ -78,25 +78,110 @@ test('navigate with extension', async ({ browserWithExtension, startClient, serv
   expect(await client.callTool({
     name: 'browser_connect',
     arguments: {
-      method: 'extension'
+      name: 'extension'
     }
   })).toHaveResponse({
     result: 'Successfully changed connection method.',
   });
 
-  const confirmationPagePromise = browserContext.waitForEvent('page', page => {
-    return page.url().startsWith('chrome-extension://jakfalbnbhgkpmoaakfflhflbfpkailf/connect.html');
+  return client;
+}
+
+async function startWithExtensionFlag(browserWithExtension: BrowserWithExtension, startClient: StartClient): Promise<Client> {
+  const { client } = await startClient({
+    args: [`--extension`],
+    config: {
+      browser: {
+        userDataDir: browserWithExtension.userDataDir,
+      }
+    },
+  });
+  return client;
+}
+
+for (const [mode, startClientMethod] of [
+  ['connect-tool', startAndCallConnectTool],
+  ['extension-flag', startWithExtensionFlag],
+] as const) {
+
+  test(`navigate with extension (${mode})`, async ({ browserWithExtension, startClient, server }) => {
+    const browserContext = await browserWithExtension.launch();
+
+    const client = await startClientMethod(browserWithExtension, startClient);
+
+    const confirmationPagePromise = browserContext.waitForEvent('page', page => {
+      return page.url().startsWith('chrome-extension://jakfalbnbhgkpmoaakfflhflbfpkailf/connect.html');
+    });
+
+    const navigateResponse = client.callTool({
+      name: 'browser_navigate',
+      arguments: { url: server.HELLO_WORLD },
+    });
+
+    const selectorPage = await confirmationPagePromise;
+    await selectorPage.locator('.tab-item', { hasText: 'Playwright MCP Extension' }).getByRole('button', { name: 'Connect' }).click();
+
+    expect(await navigateResponse).toHaveResponse({
+      pageState: expect.stringContaining(`- generic [active] [ref=e1]: Hello, world!`),
+    });
   });
 
-  const navigateResponse = client.callTool({
-    name: 'browser_navigate',
-    arguments: { url: server.HELLO_WORLD },
+  test(`snapshot of an existing page (${mode})`, async ({ browserWithExtension, startClient, server }) => {
+    const browserContext = await browserWithExtension.launch();
+
+    const page = await browserContext.newPage();
+    await page.goto(server.HELLO_WORLD);
+
+    // Another empty page.
+    await browserContext.newPage();
+    expect(browserContext.pages()).toHaveLength(3);
+
+    const client = await startClientMethod(browserWithExtension, startClient);
+    expect(browserContext.pages()).toHaveLength(3);
+
+    const confirmationPagePromise = browserContext.waitForEvent('page', page => {
+      return page.url().startsWith('chrome-extension://jakfalbnbhgkpmoaakfflhflbfpkailf/connect.html');
+    });
+
+    const navigateResponse = client.callTool({
+      name: 'browser_snapshot',
+      arguments: { },
+    });
+
+    const selectorPage = await confirmationPagePromise;
+    expect(browserContext.pages()).toHaveLength(4);
+
+    await selectorPage.locator('.tab-item', { hasText: 'Title' }).getByRole('button', { name: 'Connect' }).click();
+
+    expect(await navigateResponse).toHaveResponse({
+      pageState: expect.stringContaining(`- generic [active] [ref=e1]: Hello, world!`),
+    });
+
+    expect(browserContext.pages()).toHaveLength(4);
   });
 
-  const selectorPage = await confirmationPagePromise;
-  await selectorPage.locator('.tab-item', { hasText: 'Playwright MCP Extension' }).getByRole('button', { name: 'Connect' }).click();
+  test(`extension not installed timeout (${mode})`, async ({ browserWithExtension, startClient, server }) => {
+    process.env.PWMCP_TEST_CONNECTION_TIMEOUT = '100';
 
-  expect(await navigateResponse).toHaveResponse({
-    pageState: expect.stringContaining(`- generic [active] [ref=e1]: Hello, world!`),
+    const browserContext = await browserWithExtension.launch();
+
+    const client = await startClientMethod(browserWithExtension, startClient);
+
+    const confirmationPagePromise = browserContext.waitForEvent('page', page => {
+      return page.url().startsWith('chrome-extension://jakfalbnbhgkpmoaakfflhflbfpkailf/connect.html');
+    });
+
+    expect(await client.callTool({
+      name: 'browser_navigate',
+      arguments: { url: server.HELLO_WORLD },
+    })).toHaveResponse({
+      result: expect.stringContaining('Extension connection timeout. Make sure the "Playwright MCP Bridge" extension is installed.'),
+      isError: true,
+    });
+
+    await confirmationPagePromise;
+
+    process.env.PWMCP_TEST_CONNECTION_TIMEOUT = undefined;
   });
-});
+
+}

extension/vite.config.ts

@@ -42,10 +42,9 @@ export default defineConfig({
     emptyOutDir: false,
     minify: false,
     rollupOptions: {
-      input: 'src/ui/connect.html',
+      input: ['src/ui/connect.html', 'src/ui/status.html'],
       output: {
         manualChunks: undefined,
-        inlineDynamicImports: true,
         entryFileNames: 'lib/ui/[name].js',
         chunkFileNames: 'lib/ui/[name].js',
         assetFileNames: 'lib/ui/[name].[ext]'

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "@playwright/mcp",
-  "version": "0.0.33",
+  "version": "0.0.34",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@playwright/mcp",
-      "version": "0.0.33",
+      "version": "0.0.34",
       "license": "Apache-2.0",
       "dependencies": {
         "@modelcontextprotocol/sdk": "^1.16.0",
@@ -14,8 +14,8 @@
         "debug": "^4.4.1",
         "dotenv": "^17.2.0",
         "mime": "^4.0.7",
-        "playwright": "1.55.0-alpha-2025-08-07",
-        "playwright-core": "1.55.0-alpha-2025-08-07",
+        "playwright": "1.55.0-alpha-2025-08-12",
+        "playwright-core": "1.55.0-alpha-2025-08-12",
         "ws": "^8.18.1",
         "zod": "^3.24.1",
         "zod-to-json-schema": "^3.24.4"
@@ -27,7 +27,7 @@
         "@anthropic-ai/sdk": "^0.57.0",
         "@eslint/eslintrc": "^3.2.0",
         "@eslint/js": "^9.19.0",
-        "@playwright/test": "1.55.0-alpha-2025-08-07",
+        "@playwright/test": "1.55.0-alpha-2025-08-12",
         "@stylistic/eslint-plugin": "^3.0.1",
         "@types/debug": "^4.1.12",
         "@types/node": "^22.13.10",
@@ -703,13 +703,13 @@
       }
     },
     "node_modules/@playwright/test": {
-      "version": "1.55.0-alpha-2025-08-07",
-      "resolved": "https://registry.npmjs.org/@playwright/test/-/test-1.55.0-alpha-2025-08-07.tgz",
-      "integrity": "sha512-N83L8JSSJ+E690HCbgzmXIcbRfM/rlh0uWZhbHbMp9q4qDPABSgvhm0HGiG345PV1ozoqcCI/mXLZPircsmPIA==",
+      "version": "1.55.0-alpha-2025-08-12",
+      "resolved": "https://registry.npmjs.org/@playwright/test/-/test-1.55.0-alpha-2025-08-12.tgz",
+      "integrity": "sha512-lyq9MDSd4UcOWx5292AYLBfbYYCstg8iLb+lk6LdM69ps6bwmPloZO3Ol3JO3FQQ63qAuW9VD0w+ZYKL0lRmQA==",
       "dev": true,
       "license": "Apache-2.0",
       "dependencies": {
-        "playwright": "1.55.0-alpha-2025-08-07"
+        "playwright": "1.55.0-alpha-2025-08-12"
       },
       "bin": {
         "playwright": "cli.js"
@@ -3745,12 +3745,12 @@
       }
     },
     "node_modules/playwright": {
-      "version": "1.55.0-alpha-2025-08-07",
-      "resolved": "https://registry.npmjs.org/playwright/-/playwright-1.55.0-alpha-2025-08-07.tgz",
-      "integrity": "sha512-rH8kdQOZzhjxC6FOL9zSEDwPl88ZqQq9QEvRDONWhzKwRQ/jOXlEZRxm8QRCBdrLqBMTGHx/YOaP7MIV//rtIA==",
+      "version": "1.55.0-alpha-2025-08-12",
+      "resolved": "https://registry.npmjs.org/playwright/-/playwright-1.55.0-alpha-2025-08-12.tgz",
+      "integrity": "sha512-daZPM5gX0VTG6ae3/qOpEKc9NxoavkM2lfL0UIzTG0k+yK8ZeSPYo63iewZhVANsWRm0BT+XQ1NniAUOwWQ+xA==",
       "license": "Apache-2.0",
       "dependencies": {
-        "playwright-core": "1.55.0-alpha-2025-08-07"
+        "playwright-core": "1.55.0-alpha-2025-08-12"
       },
       "bin": {
         "playwright": "cli.js"
@@ -3763,9 +3763,9 @@
       }
     },
     "node_modules/playwright-core": {
-      "version": "1.55.0-alpha-2025-08-07",
-      "resolved": "https://registry.npmjs.org/playwright-core/-/playwright-core-1.55.0-alpha-2025-08-07.tgz",
-      "integrity": "sha512-NUuC6R0/dLk1QKiYoJL8NUsQAC6Je0C2BpuIg5h4wcvBwJ5TFldslmik17Txg3TXBSqwgG76DAl4Q6UdHGn54Q==",
+      "version": "1.55.0-alpha-2025-08-12",
+      "resolved": "https://registry.npmjs.org/playwright-core/-/playwright-core-1.55.0-alpha-2025-08-12.tgz",
+      "integrity": "sha512-4uxOd9xmeF6gqdsORzzlXd7p795vcACOiAGVHHEiTuFXsD83LYH+0C/SYLWB0Z+fAq4LdKGsy0qEfTm0JkY8Ig==",
       "license": "Apache-2.0",
       "bin": {
         "playwright-core": "cli.js"

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@playwright/mcp",
-  "version": "0.0.33",
+  "version": "0.0.34",
   "description": "Playwright Tools for MCP",
   "type": "module",
   "repository": {
@@ -17,8 +17,9 @@
   "license": "Apache-2.0",
   "scripts": {
     "build": "tsc",
-    "lint": "npm run update-readme && eslint . && tsc --noEmit",
+    "lint": "npm run update-readme && npm run check-deps && eslint . && tsc --noEmit",
     "lint-fix": "eslint . --fix",
+    "check-deps": "node utils/check-deps.js",
     "update-readme": "node utils/update-readme.js",
     "watch": "tsc --watch",
     "test": "playwright test",
@@ -42,8 +43,8 @@
     "debug": "^4.4.1",
     "dotenv": "^17.2.0",
     "mime": "^4.0.7",
-    "playwright": "1.55.0-alpha-2025-08-07",
-    "playwright-core": "1.55.0-alpha-2025-08-07",
+    "playwright": "1.55.0-alpha-2025-08-12",
+    "playwright-core": "1.55.0-alpha-2025-08-12",
     "ws": "^8.18.1",
     "zod": "^3.24.1",
     "zod-to-json-schema": "^3.24.4"
@@ -52,7 +53,7 @@
     "@anthropic-ai/sdk": "^0.57.0",
     "@eslint/eslintrc": "^3.2.0",
     "@eslint/js": "^9.19.0",
-    "@playwright/test": "1.55.0-alpha-2025-08-07",
+    "@playwright/test": "1.55.0-alpha-2025-08-12",
     "@stylistic/eslint-plugin": "^3.0.1",
     "@types/debug": "^4.1.12",
     "@types/node": "^22.13.10",

playwright.config.ts

@@ -22,12 +22,10 @@ export default defineConfig<TestOptions>({
   testDir: './tests',
   fullyParallel: true,
   forbidOnly: !!process.env.CI,
-  retries: process.env.CI ? 2 : 0,
-  workers: process.env.CI ? 1 : undefined,
+  workers: process.env.CI ? 2 : undefined,
   reporter: 'list',
   projects: [
     { name: 'chrome' },
-    { name: 'msedge', use: { mcpBrowser: 'msedge' } },
     { name: 'chromium', use: { mcpBrowser: 'chromium' } },
     ...process.env.MCP_IN_DOCKER ? [{
       name: 'chromium-docker',
@@ -39,5 +37,6 @@ export default defineConfig<TestOptions>({
     }] : [],
     { name: 'firefox', use: { mcpBrowser: 'firefox' } },
     { name: 'webkit', use: { mcpBrowser: 'webkit' } },
+    ... process.platform === 'win32' ? [{ name: 'msedge', use: { mcpBrowser: 'msedge' } }] : [],
   ],
 });

src/DEPS.list

@@ -0,0 +1,7 @@
+[*]
+./tools/
+./mcp/
+./utils/
+
+[program.ts]
+***

src/browserContextFactory.ts

@@ -21,8 +21,10 @@ import path from 'path';
 import * as playwright from 'playwright';
 // @ts-ignore
 import { registryDirectory } from 'playwright-core/lib/server/registry/index';
-import { logUnhandledError, testDebug } from './log.js';
-import { createHash } from './utils.js';
+// @ts-ignore
+import { startTraceViewerServer } from 'playwright-core/lib/server';
+import { logUnhandledError, testDebug } from './utils/log.js';
+import { createHash } from './utils/guid.js';
 import { outputFile  } from './config.js';
 
 import type { FullConfig } from './config.js';
@@ -50,7 +52,6 @@ class BaseContextFactory implements BrowserContextFactory {
   readonly description: string;
   readonly config: FullConfig;
   protected _browserPromise: Promise<playwright.Browser> | undefined;
-  protected _tracesDir: string | undefined;
 
   constructor(name: string, description: string, config: FullConfig) {
     this.name = name;
@@ -58,11 +59,11 @@ class BaseContextFactory implements BrowserContextFactory {
     this.config = config;
   }
 
-  protected async _obtainBrowser(): Promise<playwright.Browser> {
+  protected async _obtainBrowser(clientInfo: ClientInfo): Promise<playwright.Browser> {
     if (this._browserPromise)
       return this._browserPromise;
     testDebug(`obtain browser (${this.name})`);
-    this._browserPromise = this._doObtainBrowser();
+    this._browserPromise = this._doObtainBrowser(clientInfo);
     void this._browserPromise.then(browser => {
       browser.on('disconnected', () => {
         this._browserPromise = undefined;
@@ -73,16 +74,13 @@ class BaseContextFactory implements BrowserContextFactory {
     return this._browserPromise;
   }
 
-  protected async _doObtainBrowser(): Promise<playwright.Browser> {
+  protected async _doObtainBrowser(clientInfo: ClientInfo): Promise<playwright.Browser> {
     throw new Error('Not implemented');
   }
 
   async createContext(clientInfo: ClientInfo): Promise<{ browserContext: playwright.BrowserContext, close: () => Promise<void> }> {
-    if (this.config.saveTrace)
-      this._tracesDir = await outputFile(this.config, clientInfo.rootPath, `traces-${Date.now()}`);
-
     testDebug(`create browser context (${this.name})`);
-    const browser = await this._obtainBrowser();
+    const browser = await this._obtainBrowser(clientInfo);
     const browserContext = await this._doCreateContext(browser);
     return { browserContext, close: () => this._closeBrowserContext(browserContext, browser) };
   }
@@ -108,11 +106,11 @@ class IsolatedContextFactory extends BaseContextFactory {
     super('isolated', 'Create a new isolated browser context', config);
   }
 
-  protected override async _doObtainBrowser(): Promise<playwright.Browser> {
+  protected override async _doObtainBrowser(clientInfo: ClientInfo): Promise<playwright.Browser> {
     await injectCdpPort(this.config.browser);
     const browserType = playwright[this.config.browser.browserName];
     return browserType.launch({
-      tracesDir: this._tracesDir,
+      tracesDir: await startTraceServer(this.config, clientInfo.rootPath),
       ...this.config.browser.launchOptions,
       handleSIGINT: false,
       handleSIGTERM: false,
@@ -175,9 +173,7 @@ class PersistentContextFactory implements BrowserContextFactory {
     await injectCdpPort(this.config.browser);
     testDebug('create browser context (persistent)');
     const userDataDir = this.config.browser.userDataDir ?? await this._createUserDataDir(clientInfo.rootPath);
-    let tracesDir: string | undefined;
-    if (this.config.saveTrace)
-      tracesDir = await outputFile(this.config, clientInfo.rootPath, `traces-${Date.now()}`);
+    const tracesDir = await startTraceServer(this.config, clientInfo.rootPath);
 
     this._userDataDirs.add(userDataDir);
     testDebug('lock user data dir', userDataDir);
@@ -242,3 +238,16 @@ async function findFreePort(): Promise<number> {
     server.on('error', reject);
   });
 }
+
+async function startTraceServer(config: FullConfig, rootPath: string | undefined): Promise<string | undefined> {
+  if (!config.saveTrace)
+    return undefined;
+
+  const tracesDir = await outputFile(config, rootPath, `traces-${Date.now()}`);
+  const server = await startTraceViewerServer();
+  const urlPrefix = server.urlPrefix('human-readable');
+  const url = urlPrefix + '/trace/index.html?trace=' + tracesDir + '/trace.json';
+  // eslint-disable-next-line no-console
+  console.error('\nTrace viewer listening on ' + url);
+  return tracesDir;
+}

src/browserServerBackend.ts

@@ -15,25 +15,20 @@
  */
 
 import { fileURLToPath } from 'url';
-import { z } from 'zod';
 import { FullConfig } from './config.js';
 import { Context } from './context.js';
-import { logUnhandledError } from './log.js';
+import { logUnhandledError } from './utils/log.js';
 import { Response } from './response.js';
 import { SessionLog } from './sessionLog.js';
 import { filteredTools } from './tools.js';
-import { packageJSON } from './package.js';
-import { defineTool  } from './tools/tool.js';
+import { packageJSON } from './utils/package.js';
+import { toMcpTool } from './mcp/tool.js';
 
 import type { Tool } from './tools/tool.js';
 import type { BrowserContextFactory } from './browserContextFactory.js';
 import type * as mcpServer from './mcp/server.js';
 import type { ServerBackend } from './mcp/server.js';
 
-type NonEmptyArray<T> = [T, ...T[]];
-
-export type FactoryList = NonEmptyArray<BrowserContextFactory>;
-
 export class BrowserServerBackend implements ServerBackend {
   name = 'Playwright';
   version = packageJSON.version;
@@ -44,21 +39,15 @@ export class BrowserServerBackend implements ServerBackend {
   private _config: FullConfig;
   private _browserContextFactory: BrowserContextFactory;
 
-  constructor(config: FullConfig, factories: FactoryList) {
+  constructor(config: FullConfig, factory: BrowserContextFactory) {
     this._config = config;
-    this._browserContextFactory = factories[0];
+    this._browserContextFactory = factory;
     this._tools = filteredTools(config);
-    if (factories.length > 1)
-      this._tools.push(this._defineContextSwitchTool(factories));
   }
 
-  async initialize(server: mcpServer.Server): Promise<void> {
-    const capabilities = server.getClientCapabilities() as mcpServer.ClientCapabilities;
+  async initialize(clientVersion: mcpServer.ClientVersion, roots: mcpServer.Root[]): Promise<void> {
     let rootPath: string | undefined;
-    if (capabilities.roots && (
-      server.getClientVersion()?.name === 'Visual Studio Code' ||
-      server.getClientVersion()?.name === 'Visual Studio Code - Insiders')) {
-      const { roots } = await server.listRoots();
+    if (roots.length > 0) {
       const firstRootUri = roots[0]?.uri;
       const url = firstRootUri ? new URL(firstRootUri) : undefined;
       rootPath = url ? fileURLToPath(url) : undefined;
@@ -69,18 +58,21 @@ export class BrowserServerBackend implements ServerBackend {
       config: this._config,
       browserContextFactory: this._browserContextFactory,
       sessionLog: this._sessionLog,
-      clientInfo: { ...server.getClientVersion(), rootPath },
+      clientInfo: { ...clientVersion, rootPath },
     });
   }
 
-  tools(): mcpServer.ToolSchema<any>[] {
-    return this._tools.map(tool => tool.schema);
+  async listTools(): Promise<mcpServer.Tool[]> {
+    return this._tools.map(tool => toMcpTool(tool.schema));
   }
 
-  async callTool(schema: mcpServer.ToolSchema<any>, parsedArguments: any) {
+  async callTool(name: string, rawArguments: mcpServer.CallToolRequest['params']['arguments']) {
+    const tool = this._tools.find(tool => tool.schema.name === name)!;
+    if (!tool)
+      throw new Error(`Tool "${name}" not found`);
+    const parsedArguments = tool.schema.inputSchema.parse(rawArguments || {});
     const context = this._context!;
-    const response = new Response(context, schema.name, parsedArguments);
-    const tool = this._tools.find(tool => tool.schema.name === schema.name)!;
+    const response = new Response(context, name, parsedArguments);
     context.setRunningTool(true);
     try {
       await tool.handle(context, parsedArguments, response);
@@ -95,48 +87,6 @@ export class BrowserServerBackend implements ServerBackend {
   }
 
   serverClosed() {
-    void this._context!.dispose().catch(logUnhandledError);
-  }
-
-  private _defineContextSwitchTool(factories: FactoryList): Tool<any> {
-    const self = this;
-    return defineTool({
-      capability: 'core',
-
-      schema: {
-        name: 'browser_connect',
-        title: 'Connect to a browser context',
-        description: [
-          'Connect to a browser using one of the available methods:',
-          ...factories.map(factory => `- "${factory.name}": ${factory.description}`),
-        ].join('\n'),
-        inputSchema: z.object({
-          method: z.enum(factories.map(factory => factory.name) as [string, ...string[]]).default(factories[0].name).describe('The method to use to connect to the browser'),
-        }),
-        type: 'readOnly',
-      },
-
-      async handle(context, params, response) {
-        const factory = factories.find(factory => factory.name === params.method);
-        if (!factory) {
-          response.addError('Unknown connection method: ' + params.method);
-          return;
-        }
-        await self._setContextFactory(factory);
-        response.addResult('Successfully changed connection method.');
-      }
-    });
-  }
-
-  private async _setContextFactory(newFactory: BrowserContextFactory) {
-    if (this._context) {
-      const options = {
-        ...this._context.options,
-        browserContextFactory: newFactory,
-      };
-      await this._context.dispose();
-      this._context = new Context(options);
-    }
-    this._browserContextFactory = newFactory;
+    void this._context?.dispose().catch(logUnhandledError);
   }
 }

src/config.ts

@@ -18,7 +18,7 @@ import fs from 'fs';
 import os from 'os';
 import path from 'path';
 import { devices } from 'playwright';
-import { sanitizeForFilePath } from './utils.js';
+import { sanitizeForFilePath } from './utils/fileUtils.js';
 
 import type { Config, ToolCapability } from '../config.js';
 import type { BrowserContextOptions, LaunchOptions } from 'playwright';

src/context.ts

@@ -17,7 +17,7 @@
 import debug from 'debug';
 import * as playwright from 'playwright';
 
-import { logUnhandledError } from './log.js';
+import { logUnhandledError } from './utils/log.js';
 import { Tab } from './tab.js';
 import { outputFile  } from './config.js';
 

src/extension/DEPS.list

@@ -0,0 +1,3 @@
+[*]
+../mcp/
+../utils/

src/extension/cdpRelay.ts

@@ -26,9 +26,9 @@ import { spawn } from 'child_process';
 import http from 'http';
 import debug from 'debug';
 import { WebSocket, WebSocketServer } from 'ws';
-import { httpAddressToString } from '../httpServer.js';
-import { logUnhandledError } from '../log.js';
-import { ManualPromise } from '../manualPromise.js';
+import { httpAddressToString } from '../utils/httpServer.js';
+import { logUnhandledError } from '../utils/log.js';
+import { ManualPromise } from '../utils/manualPromise.js';
 import type websocket from 'ws';
 import type { ClientInfo } from '../browserContextFactory.js';
 
@@ -100,6 +100,9 @@ export class CDPRelayServer {
     debugLogger('Waiting for incoming extension connection');
     await Promise.race([
       this._extensionConnectionPromise,
+      new Promise((_, reject) => setTimeout(() => {
+        reject(new Error(`Extension connection timeout. Make sure the "Playwright MCP Bridge" extension is installed. See https://github.com/microsoft/playwright-mcp/blob/main/extension/README.md for installation instructions.`));
+      }, process.env.PWMCP_TEST_CONNECTION_TIMEOUT ? parseInt(process.env.PWMCP_TEST_CONNECTION_TIMEOUT, 10) : 5_000)),
       new Promise((_, reject) => abortSignal.addEventListener('abort', reject))
     ]);
     debugLogger('Extension connection established');

src/extension/extensionContextFactory.ts

@@ -16,7 +16,7 @@
 
 import debug from 'debug';
 import * as playwright from 'playwright';
-import { startHttpServer } from '../httpServer.js';
+import { startHttpServer } from '../utils/httpServer.js';
 import { CDPRelayServer } from './cdpRelay.js';
 
 import type { BrowserContextFactory, ClientInfo } from '../browserContextFactory.js';

src/extension/main.ts

@@ -1,31 +0,0 @@
-/**
- * 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 { ExtensionContextFactory } from './extensionContextFactory.js';
-import { BrowserServerBackend } from '../browserServerBackend.js';
-import * as mcpTransport from '../mcp/transport.js';
-
-import type { FullConfig } from '../config.js';
-
-export async function runWithExtension(config: FullConfig) {
-  const contextFactory = new ExtensionContextFactory(config.browser.launchOptions.channel || 'chrome', config.browser.userDataDir);
-  const serverBackendFactory = () => new BrowserServerBackend(config, [contextFactory]);
-  await mcpTransport.start(serverBackendFactory, config.server);
-}
-
-export function createExtensionContextFactory(config: FullConfig) {
-  return new ExtensionContextFactory(config.browser.launchOptions.channel || 'chrome', config.browser.userDataDir);
-}

src/index.ts

@@ -27,7 +27,7 @@ import type { Server } from '@modelcontextprotocol/sdk/server/index.js';
 export async function createConnection(userConfig: Config = {}, contextGetter?: () => Promise<BrowserContext>): Promise<Server> {
   const config = await resolveConfig(userConfig);
   const factory = contextGetter ? new SimpleBrowserContextFactory(contextGetter) : contextFactory(config);
-  return mcpServer.createServer(new BrowserServerBackend(config, [factory]), false);
+  return mcpServer.createServer(new BrowserServerBackend(config, factory), false);
 }
 
 class SimpleBrowserContextFactory implements BrowserContextFactory {

src/loopTools/DEPS.list

@@ -0,0 +1,5 @@
+[*]
+../
+../loop/
+../mcp/
+../utils/

src/loopTools/context.ts

@@ -46,13 +46,13 @@ export class Context {
   static async create(config: FullConfig) {
     const client = new Client({ name: 'Playwright Proxy', version: '1.0.0' });
     const browserContextFactory = contextFactory(config);
-    const server = mcpServer.createServer(new BrowserServerBackend(config, [browserContextFactory]), false);
+    const server = mcpServer.createServer(new BrowserServerBackend(config, browserContextFactory), false);
     await client.connect(new InProcessTransport(server));
     await client.ping();
     return new Context(config, client);
   }
 
-  async runTask(task: string, oneShot: boolean = false): Promise<mcpServer.ToolResponse> {
+  async runTask(task: string, oneShot: boolean = false): Promise<mcpServer.CallToolResult> {
     const messages = await runTask(this._delegate, this._client!, task, oneShot);
     const lines: string[] = [];
 

src/loopTools/main.ts

@@ -18,10 +18,11 @@ import dotenv from 'dotenv';
 
 import * as mcpServer from '../mcp/server.js';
 import * as mcpTransport from '../mcp/transport.js';
-import { packageJSON } from '../package.js';
+import { packageJSON } from '../utils/package.js';
 import { Context } from './context.js';
 import { perform } from './perform.js';
 import { snapshot } from './snapshot.js';
+import { toMcpTool } from '../mcp/tool.js';
 
 import type { FullConfig } from '../config.js';
 import type { ServerBackend } from '../mcp/server.js';
@@ -48,12 +49,13 @@ class LoopToolsServerBackend implements ServerBackend {
     this._context = await Context.create(this._config);
   }
 
-  tools(): mcpServer.ToolSchema<any>[] {
-    return this._tools.map(tool => tool.schema);
+  async listTools(): Promise<mcpServer.Tool[]> {
+    return this._tools.map(tool => toMcpTool(tool.schema));
   }
 
-  async callTool(schema: mcpServer.ToolSchema<any>, parsedArguments: any): Promise<mcpServer.ToolResponse> {
-    const tool = this._tools.find(tool => tool.schema.name === schema.name)!;
+  async callTool(name: string, args: mcpServer.CallToolRequest['params']['arguments']): Promise<mcpServer.CallToolResult> {
+    const tool = this._tools.find(tool => tool.schema.name === name)!;
+    const parsedArguments = tool.schema.inputSchema.parse(args || {});
     return await tool.handle(this._context!, parsedArguments);
   }
 

src/loopTools/tool.ts

@@ -17,11 +17,12 @@
 import type { z } from 'zod';
 import type * as mcpServer from '../mcp/server.js';
 import type { Context } from './context.js';
+import type { ToolSchema } from '../mcp/tool.js';
 
 
 export type Tool<Input extends z.Schema = z.Schema> = {
-  schema: mcpServer.ToolSchema<Input>;
-  handle: (context: Context, params: z.output<Input>) => Promise<mcpServer.ToolResponse>;
+  schema: ToolSchema<Input>;
+  handle: (context: Context, params: z.output<Input>) => Promise<mcpServer.CallToolResult>;
 };
 
 export function defineTool<Input extends z.Schema>(tool: Tool<Input>): Tool<Input> {

src/mcp/DEPS.list

@@ -0,0 +1,2 @@
+[*]
+../utils/

src/mcp/proxyBackend.ts

@@ -0,0 +1,131 @@
+/**
+ * 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 { z } from 'zod';
+import { zodToJsonSchema } from 'zod-to-json-schema';
+
+import { Client } from '@modelcontextprotocol/sdk/client/index.js';
+import { ListRootsRequestSchema, PingRequestSchema } from '@modelcontextprotocol/sdk/types.js';
+import { logUnhandledError } from '../utils/log.js';
+import { packageJSON } from '../utils/package.js';
+
+
+import type { ServerBackend, ClientVersion, Root } from './server.js';
+import type { Transport } from '@modelcontextprotocol/sdk/shared/transport.js';
+import type { Tool, CallToolResult, CallToolRequest } from '@modelcontextprotocol/sdk/types.js';
+
+export type MCPProvider = {
+  name: string;
+  description: string;
+  connect(): Promise<Transport>;
+};
+
+export class ProxyBackend implements ServerBackend {
+  name = 'Playwright MCP Client Switcher';
+  version = packageJSON.version;
+
+  private _mcpProviders: MCPProvider[];
+  private _currentClient: Client | undefined;
+  private _contextSwitchTool: Tool;
+  private _roots: Root[] = [];
+
+  constructor(mcpProviders: MCPProvider[]) {
+    this._mcpProviders = mcpProviders;
+    this._contextSwitchTool = this._defineContextSwitchTool();
+  }
+
+  async initialize(clientVersion: ClientVersion, roots: Root[]): Promise<void> {
+    this._roots = roots;
+    await this._setCurrentClient(this._mcpProviders[0]);
+  }
+
+  async listTools(): Promise<Tool[]> {
+    const response = await this._currentClient!.listTools();
+    if (this._mcpProviders.length === 1)
+      return response.tools;
+    return [
+      ...response.tools,
+      this._contextSwitchTool,
+    ];
+  }
+
+  async callTool(name: string, args: CallToolRequest['params']['arguments']): Promise<CallToolResult> {
+    if (name === this._contextSwitchTool.name)
+      return this._callContextSwitchTool(args);
+    return await this._currentClient!.callTool({
+      name,
+      arguments: args,
+    }) as CallToolResult;
+  }
+
+  serverClosed?(): void {
+    void this._currentClient?.close().catch(logUnhandledError);
+  }
+
+  private async _callContextSwitchTool(params: any): Promise<CallToolResult> {
+    try {
+      const factory = this._mcpProviders.find(factory => factory.name === params.name);
+      if (!factory)
+        throw new Error('Unknown connection method: ' + params.name);
+
+      await this._setCurrentClient(factory);
+      return {
+        content: [{ type: 'text', text: '### Result\nSuccessfully changed connection method.\n' }],
+      };
+    } catch (error) {
+      return {
+        content: [{ type: 'text', text: `### Result\nError: ${error}\n` }],
+        isError: true,
+      };
+    }
+  }
+
+  private _defineContextSwitchTool(): Tool {
+    return {
+      name: 'browser_connect',
+      description: [
+        'Connect to a browser using one of the available methods:',
+        ...this._mcpProviders.map(factory => `- "${factory.name}": ${factory.description}`),
+      ].join('\n'),
+      inputSchema: zodToJsonSchema(z.object({
+        name: z.enum(this._mcpProviders.map(factory => factory.name) as [string, ...string[]]).default(this._mcpProviders[0].name).describe('The method to use to connect to the browser'),
+      }), { strictUnions: true }) as Tool['inputSchema'],
+      annotations: {
+        title: 'Connect to a browser context',
+        readOnlyHint: true,
+        openWorldHint: false,
+      },
+    };
+  }
+
+  private async _setCurrentClient(factory: MCPProvider) {
+    await this._currentClient?.close();
+    this._currentClient = undefined;
+
+    const client = new Client({ name: 'Playwright MCP Proxy', version: packageJSON.version });
+    client.registerCapabilities({
+      roots: {
+        listRoots: true,
+      },
+    });
+    client.setRequestHandler(ListRootsRequestSchema, () => ({ roots: this._roots }));
+    client.setRequestHandler(PingRequestSchema, () => ({}));
+
+    const transport = await factory.connect();
+    await client.connect(transport);
+    this._currentClient = client;
+  }
+}

src/mcp/server.ts

@@ -14,44 +14,26 @@
  * limitations under the License.
  */
 
-import { z } from 'zod';
+import debug from 'debug';
 import { Server } from '@modelcontextprotocol/sdk/server/index.js';
 import { CallToolRequestSchema, ListToolsRequestSchema } from '@modelcontextprotocol/sdk/types.js';
-import { zodToJsonSchema } from 'zod-to-json-schema';
-import { ManualPromise } from '../manualPromise.js';
-import { logUnhandledError } from '../log.js';
+import { ManualPromise } from '../utils/manualPromise.js';
+import { logUnhandledError } from '../utils/log.js';
 
-import type { ImageContent, TextContent } from '@modelcontextprotocol/sdk/types.js';
+import type { Tool, CallToolResult, CallToolRequest, Root } from '@modelcontextprotocol/sdk/types.js';
 import type { Transport } from '@modelcontextprotocol/sdk/shared/transport.js';
 export type { Server } from '@modelcontextprotocol/sdk/server/index.js';
+export type { Tool, CallToolResult, CallToolRequest, Root } from '@modelcontextprotocol/sdk/types.js';
 
-export type ClientCapabilities = {
-  roots?: {
-    listRoots?: boolean
-  };
-};
-
-export type ToolResponse = {
-  content: (TextContent | ImageContent)[];
-  isError?: boolean;
-};
-
-export type ToolSchema<Input extends z.Schema> = {
-  name: string;
-  title: string;
-  description: string;
-  inputSchema: Input;
-  type: 'readOnly' | 'destructive';
-};
-
-export type ToolHandler = (toolName: string, params: any) => Promise<ToolResponse>;
+const serverDebug = debug('pw:mcp:server');
 
+export type ClientVersion = { name: string, version: string };
 export interface ServerBackend {
   name: string;
   version: string;
-  initialize?(server: Server): Promise<void>;
-  tools(): ToolSchema<any>[];
-  callTool(schema: ToolSchema<any>, parsedArguments: any): Promise<ToolResponse>;
+  initialize?(clientVersion: ClientVersion, roots: Root[]): Promise<void>;
+  listTools(): Promise<Tool[]>;
+  callTool(name: string, args: CallToolRequest['params']['arguments']): Promise<CallToolResult>;
   serverClosed?(): void;
 }
 
@@ -71,23 +53,16 @@ export function createServer(backend: ServerBackend, runHeartbeat: boolean): Ser
     }
   });
 
-  const tools = backend.tools();
   server.setRequestHandler(ListToolsRequestSchema, async () => {
-    return { tools: tools.map(tool => ({
-      name: tool.name,
-      description: tool.description,
-      inputSchema: zodToJsonSchema(tool.inputSchema),
-      annotations: {
-        title: tool.title,
-        readOnlyHint: tool.type === 'readOnly',
-        destructiveHint: tool.type === 'destructive',
-        openWorldHint: true,
-      },
-    })) };
+    serverDebug('listTools');
+    await initializedPromise;
+    const tools = await backend.listTools();
+    return { tools };
   });
 
   let heartbeatRunning = false;
   server.setRequestHandler(CallToolRequestSchema, async request => {
+    serverDebug('callTool', request);
     await initializedPromise;
 
     if (runHeartbeat && !heartbeatRunning) {
@@ -95,22 +70,29 @@ export function createServer(backend: ServerBackend, runHeartbeat: boolean): Ser
       startHeartbeat(server);
     }
 
-    const errorResult = (...messages: string[]) => ({
-      content: [{ type: 'text', text: '### Result\n' + messages.join('\n') }],
-      isError: true,
-    });
-    const tool = tools.find(tool => tool.name === request.params.name) as ToolSchema<any>;
-    if (!tool)
-      return errorResult(`Error: Tool "${request.params.name}" not found`);
-
     try {
-      return await backend.callTool(tool, tool.inputSchema.parse(request.params.arguments || {}));
+      return await backend.callTool(request.params.name, request.params.arguments || {});
     } catch (error) {
-      return errorResult(String(error));
+      return {
+        content: [{ type: 'text', text: '### Result\n' + String(error) }],
+        isError: true,
+      };
     }
   });
-  addServerListener(server, 'initialized', () => {
-    backend.initialize?.(server).then(() => initializedPromise.resolve()).catch(logUnhandledError);
+  addServerListener(server, 'initialized', async () => {
+    try {
+      const capabilities = server.getClientCapabilities();
+      let clientRoots: Root[] = [];
+      if (capabilities?.roots) {
+        const { roots } = await server.listRoots(undefined, { timeout: 2_000 }).catch(() => ({ roots: [] }));
+        clientRoots = roots;
+      }
+      const clientVersion = server.getClientVersion() ?? { name: 'unknown', version: 'unknown' };
+      await backend.initialize?.(clientVersion, clientRoots);
+      initializedPromise.resolve();
+    } catch (e) {
+      logUnhandledError(e);
+    }
   });
   addServerListener(server, 'close', () => backend.serverClosed?.());
   return server;

src/mcp/tool.ts

@@ -0,0 +1,42 @@
+/**
+ * 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 { zodToJsonSchema } from 'zod-to-json-schema';
+
+import type { z } from 'zod';
+import type * as mcpServer from './server.js';
+
+export type ToolSchema<Input extends z.Schema> = {
+  name: string;
+  title: string;
+  description: string;
+  inputSchema: Input;
+  type: 'readOnly' | 'destructive';
+};
+
+export function toMcpTool(tool: ToolSchema<any>): mcpServer.Tool {
+  return {
+    name: tool.name,
+    description: tool.description,
+    inputSchema: zodToJsonSchema(tool.inputSchema, { strictUnions: true }) as mcpServer.Tool['inputSchema'],
+    annotations: {
+      title: tool.title,
+      readOnlyHint: tool.type === 'readOnly',
+      destructiveHint: tool.type === 'destructive',
+      openWorldHint: true,
+    },
+  };
+}

src/mcp/transport.ts

@@ -21,7 +21,7 @@ import debug from 'debug';
 import { SSEServerTransport } from '@modelcontextprotocol/sdk/server/sse.js';
 import { StreamableHTTPServerTransport } from '@modelcontextprotocol/sdk/server/streamableHttp.js';
 import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js';
-import { httpAddressToString, startHttpServer } from '../httpServer.js';
+import { httpAddressToString, startHttpServer } from '../utils/httpServer.js';
 import * as mcpServer from './server.js';
 
 import type { ServerBackendFactory } from './server.js';

src/program.ts

@@ -15,17 +15,21 @@
  */
 
 import { program, Option } from 'commander';
-// @ts-ignore
-import { startTraceViewerServer } from 'playwright-core/lib/server';
-
+import * as mcpServer from './mcp/server.js';
 import * as mcpTransport from './mcp/transport.js';
 import { commaSeparatedList, resolveCLIConfig, semicolonSeparatedList } from './config.js';
-import { packageJSON } from './package.js';
-import { createExtensionContextFactory, runWithExtension } from './extension/main.js';
-import { BrowserServerBackend, FactoryList } from './browserServerBackend.js';
+import { packageJSON } from './utils/package.js';
 import { Context } from './context.js';
 import { contextFactory } from './browserContextFactory.js';
 import { runLoopTools } from './loopTools/main.js';
+import { ProxyBackend } from './mcp/proxyBackend.js';
+import { BrowserServerBackend } from './browserServerBackend.js';
+import { ExtensionContextFactory } from './extension/extensionContextFactory.js';
+import { InProcessTransport } from './mcp/inProcessTransport.js';
+
+import type { MCPProvider } from './mcp/proxyBackend.js';
+import type { FullConfig } from './config.js';
+import type { BrowserContextFactory } from './browserContextFactory.js';
 
 program
     .version('Version ' + packageJSON.version)
@@ -39,6 +43,7 @@ program
     .option('--config <path>', 'path to the configuration file.')
     .option('--device <device>', 'device to emulate, for example: "iPhone 15"')
     .option('--executable-path <path>', 'path to the browser executable.')
+    .option('--extension', 'Connect to a running browser instance (Edge/Chrome only). Requires the "Playwright MCP Bridge" browser extension to be installed.')
     .option('--headless', 'run browser in headless mode, headed by default')
     .option('--host <host>', 'host to bind server to. Default is localhost. Use 0.0.0.0 to bind to all interfaces.')
     .option('--ignore-https-errors', 'ignore https errors')
@@ -55,7 +60,6 @@ program
     .option('--user-agent <ua string>', 'specify user agent string')
     .option('--user-data-dir <path>', 'path to the user data directory. If not specified, a temporary directory will be created.')
     .option('--viewport-size <size>', 'specify browser viewport size in pixels, for example "1280, 720"')
-    .addOption(new Option('--extension', 'Connect to a running browser instance (Edge/Chrome only). Requires the "Playwright MCP Bridge" browser extension to be installed.').hideHelp())
     .addOption(new Option('--connect-tool', 'Allow to switch between different browser connection methods.').hideHelp())
     .addOption(new Option('--loop-tools', 'Run loop tools').hideHelp())
     .addOption(new Option('--vision', 'Legacy option, use --caps=vision instead').hideHelp())
@@ -70,28 +74,22 @@ program
       const config = await resolveCLIConfig(options);
 
       if (options.extension) {
-        await runWithExtension(config);
+        const contextFactory = createExtensionContextFactory(config);
+        const serverBackendFactory = () => new BrowserServerBackend(config, contextFactory);
+        await mcpTransport.start(serverBackendFactory, config.server);
         return;
       }
+
       if (options.loopTools) {
         await runLoopTools(config);
         return;
       }
 
       const browserContextFactory = contextFactory(config);
-      const factories: FactoryList = [browserContextFactory];
+      const providers: MCPProvider[] = [mcpProviderForBrowserContextFactory(config, browserContextFactory)];
       if (options.connectTool)
-        factories.push(createExtensionContextFactory(config));
-      const serverBackendFactory = () => new BrowserServerBackend(config, factories);
-      await mcpTransport.start(serverBackendFactory, config.server);
-
-      if (config.saveTrace) {
-        const server = await startTraceViewerServer();
-        const urlPrefix = server.urlPrefix('human-readable');
-        const url = urlPrefix + '/trace/index.html?trace=' + config.browser.launchOptions.tracesDir + '/trace.json';
-        // eslint-disable-next-line no-console
-        console.error('\nTrace viewer listening on ' + url);
-      }
+        providers.push(mcpProviderForBrowserContextFactory(config, createExtensionContextFactory(config)));
+      await mcpTransport.start(() => new ProxyBackend(providers), config.server);
     });
 
 function setupExitWatchdog() {
@@ -110,4 +108,19 @@ function setupExitWatchdog() {
   process.on('SIGTERM', handleExit);
 }
 
+function createExtensionContextFactory(config: FullConfig) {
+  return new ExtensionContextFactory(config.browser.launchOptions.channel || 'chrome', config.browser.userDataDir);
+}
+
+function mcpProviderForBrowserContextFactory(config: FullConfig, browserContextFactory: BrowserContextFactory) {
+  return {
+    name: browserContextFactory.name,
+    description: browserContextFactory.description,
+    connect: async () => {
+      const server = mcpServer.createServer(new BrowserServerBackend(config, browserContextFactory), false);
+      return new InProcessTransport(server);
+    },
+  };
+}
+
 void program.parseAsync(process.argv);

src/sessionLog.ts

@@ -18,7 +18,7 @@ import fs from 'fs';
 import path from 'path';
 
 import { Response } from './response.js';
-import { logUnhandledError } from './log.js';
+import { logUnhandledError } from './utils/log.js';
 import { outputFile  } from './config.js';
 
 import type { FullConfig } from './config.js';

src/tab.ts

@@ -17,8 +17,8 @@
 import { EventEmitter } from 'events';
 import * as playwright from 'playwright';
 import { callOnPageNoTrace, waitForCompletion } from './tools/utils.js';
-import { logUnhandledError } from './log.js';
-import { ManualPromise } from './manualPromise.js';
+import { logUnhandledError } from './utils/log.js';
+import { ManualPromise } from './utils/manualPromise.js';
 import { ModalState } from './tools/tool.js';
 
 import type { Context } from './context.js';

src/tools/DEPS.list

@@ -0,0 +1,2 @@
+[*]
+../utils/

src/tools/evaluate.ts

@@ -17,7 +17,7 @@
 import { z } from 'zod';
 
 import { defineTabTool } from './tool.js';
-import * as javascript from '../javascript.js';
+import * as javascript from '../utils/codegen.js';
 import { generateLocator } from './utils.js';
 
 import type * as playwright from 'playwright';

src/tools/keyboard.ts

@@ -19,7 +19,7 @@ import { z } from 'zod';
 import { defineTabTool } from './tool.js';
 import { elementSchema } from './snapshot.js';
 import { generateLocator } from './utils.js';
-import * as javascript from '../javascript.js';
+import * as javascript from '../utils/codegen.js';
 
 const pressKey = defineTabTool({
   capability: 'core',

src/tools/pdf.ts

@@ -17,7 +17,7 @@
 import { z } from 'zod';
 import { defineTabTool } from './tool.js';
 
-import * as javascript from '../javascript.js';
+import * as javascript from '../utils/codegen.js';
 
 const pdfSchema = z.object({
   filename: z.string().optional().describe('File name to save the pdf to. Defaults to `page-{timestamp}.pdf` if not specified.'),

src/tools/screenshot.ts

@@ -17,7 +17,7 @@
 import { z } from 'zod';
 
 import { defineTabTool } from './tool.js';
-import * as javascript from '../javascript.js';
+import * as javascript from '../utils/codegen.js';
 import { generateLocator } from './utils.js';
 
 import type * as playwright from 'playwright';

src/tools/snapshot.ts

@@ -17,7 +17,7 @@
 import { z } from 'zod';
 
 import { defineTabTool, defineTool } from './tool.js';
-import * as javascript from '../javascript.js';
+import * as javascript from '../utils/codegen.js';
 import { generateLocator } from './utils.js';
 
 const snapshot = defineTool({

src/tools/tool.ts

@@ -20,7 +20,7 @@ import type * as playwright from 'playwright';
 import type { ToolCapability } from '../../config.js';
 import type { Tab } from '../tab.js';
 import type { Response } from '../response.js';
-import type { ToolSchema } from '../mcp/server.js';
+import type { ToolSchema } from '../mcp/tool.js';
 
 export type FileUploadModalState = {
   type: 'fileChooser';

src/tools/wait.ts

@@ -36,10 +36,8 @@ const wait = defineTool({
     if (!params.text && !params.textGone && !params.time)
       throw new Error('Either time, text or textGone must be provided');
 
-    const code: string[] = [];
-
     if (params.time) {
-      code.push(`await new Promise(f => setTimeout(f, ${params.time!} * 1000));`);
+      response.addCode(`await new Promise(f => setTimeout(f, ${params.time!} * 1000));`);
       await new Promise(f => setTimeout(f, Math.min(30000, params.time! * 1000)));
     }
 
@@ -48,12 +46,12 @@ const wait = defineTool({
     const goneLocator = params.textGone ? tab.page.getByText(params.textGone).first() : undefined;
 
     if (goneLocator) {
-      code.push(`await page.getByText(${JSON.stringify(params.textGone)}).first().waitFor({ state: 'hidden' });`);
+      response.addCode(`await page.getByText(${JSON.stringify(params.textGone)}).first().waitFor({ state: 'hidden' });`);
       await goneLocator.waitFor({ state: 'hidden' });
     }
 
     if (locator) {
-      code.push(`await page.getByText(${JSON.stringify(params.text)}).first().waitFor({ state: 'visible' });`);
+      response.addCode(`await page.getByText(${JSON.stringify(params.text)}).first().waitFor({ state: 'visible' });`);
       await locator.waitFor({ state: 'visible' });
     }
 

src/utils/codegen.ts

@@ -27,7 +27,7 @@ export function escapeWithQuotes(text: string, char: string = '\'') {
   if (char === '"')
     return char + escapedText.replace(/["]/g, '\\"') + char;
   if (char === '`')
-    return char + escapedText.replace(/[`]/g, '`') + char;
+    return char + escapedText.replace(/[`]/g, '\\`') + char;
   throw new Error('Invalid escape char');
 }
 

src/utils/fileUtils.ts

@@ -17,8 +17,6 @@
 import os from 'node:os';
 import path from 'node:path';
 
-import type { FullConfig } from './config.js';
-
 export function cacheDir() {
   let cacheDirectory: string;
   if (process.platform === 'linux')
@@ -32,6 +30,10 @@ export function cacheDir() {
   return path.join(cacheDirectory, 'ms-playwright');
 }
 
-export async function userDataDir(browserConfig: FullConfig['browser']) {
-  return path.join(cacheDir(), 'ms-playwright', `mcp-${browserConfig.launchOptions?.channel ?? browserConfig?.browserName}-profile`);
+export function sanitizeForFilePath(s: string) {
+  const sanitize = (s: string) => s.replace(/[\x00-\x2C\x2E-\x2F\x3A-\x40\x5B-\x60\x7B-\x7F]+/g, '-');
+  const separator = s.lastIndexOf('.');
+  if (separator === -1)
+    return sanitize(s);
+  return sanitize(s.substring(0, separator)) + '.' + sanitize(s.substring(separator + 1));
 }

src/utils/guid.ts

@@ -16,14 +16,10 @@
 
 import crypto from 'crypto';
 
+export function createGuid(): string {
+  return crypto.randomBytes(16).toString('hex');
+}
+
 export function createHash(data: string): string {
   return crypto.createHash('sha256').update(data).digest('hex').slice(0, 7);
 }
-
-export function sanitizeForFilePath(s: string) {
-  const sanitize = (s: string) => s.replace(/[\x00-\x2C\x2E-\x2F\x3A-\x40\x5B-\x60\x7B-\x7F]+/g, '-');
-  const separator = s.lastIndexOf('.');
-  if (separator === -1)
-    return sanitize(s);
-  return sanitize(s.substring(0, separator)) + '.' + sanitize(s.substring(separator + 1));
-}

src/utils/package.ts

@@ -19,4 +19,4 @@ import path from 'path';
 import url from 'url';
 
 const __filename = url.fileURLToPath(import.meta.url);
-export const packageJSON = JSON.parse(fs.readFileSync(path.join(path.dirname(__filename), '..', 'package.json'), 'utf8'));
+export const packageJSON = JSON.parse(fs.readFileSync(path.join(path.dirname(__filename), '..', '..', 'package.json'), 'utf8'));

tests/capabilities.spec.ts

@@ -46,6 +46,40 @@ test('test snapshot tool list', async ({ client }) => {
   ]));
 });
 
+test('test tool list proxy mode', async ({ startClient }) => {
+  const { client } = await startClient({
+    args: ['--connect-tool'],
+  });
+  const { tools } = await client.listTools();
+  expect(new Set(tools.map(t => t.name))).toEqual(new Set([
+    'browser_click',
+    'browser_connect', // the extra tool
+    'browser_console_messages',
+    'browser_drag',
+    'browser_evaluate',
+    'browser_file_upload',
+    'browser_handle_dialog',
+    'browser_hover',
+    'browser_select_option',
+    'browser_type',
+    'browser_close',
+    'browser_install',
+    'browser_navigate_back',
+    'browser_navigate_forward',
+    'browser_navigate',
+    'browser_network_requests',
+    'browser_press_key',
+    'browser_resize',
+    'browser_snapshot',
+    'browser_tab_close',
+    'browser_tab_list',
+    'browser_tab_new',
+    'browser_tab_select',
+    'browser_take_screenshot',
+    'browser_wait_for',
+  ]));
+});
+
 test('test capabilities (pdf)', async ({ startClient }) => {
   const { client } = await startClient({
     args: ['--caps=pdf'],

tests/fixtures.ts

@@ -40,14 +40,18 @@ type CDPServer = {
   start: () => Promise<BrowserContext>;
 };
 
+export type StartClient = (options?: {
+  clientName?: string,
+  args?: string[],
+  config?: Config,
+  roots?: { name: string, uri: string }[],
+  rootsResponseDelay?: number,
+}) => Promise<{ client: Client, stderr: () => string }>;
+
+
 type TestFixtures = {
   client: Client;
-  startClient: (options?: {
-    clientName?: string,
-    args?: string[],
-    config?: Config,
-    roots?: { name: string, uri: string }[],
-  }) => Promise<{ client: Client, stderr: () => string }>;
+  startClient: StartClient;
   wsEndpoint: string;
   cdpServer: CDPServer;
   server: TestServer;
@@ -68,7 +72,7 @@ export const test = baseTest.extend<TestFixtures & TestOptions, WorkerFixtures>(
 
   startClient: async ({ mcpHeadless, mcpBrowser, mcpMode }, use, testInfo) => {
     const configDir = path.dirname(test.info().config.configFile!);
-    let client: Client | undefined;
+    const clients: Client[] = [];
 
     await use(async options => {
       const args: string[] = [];
@@ -86,9 +90,11 @@ export const test = baseTest.extend<TestFixtures & TestOptions, WorkerFixtures>(
         args.push(`--config=${path.relative(configDir, configFile)}`);
       }
 
-      client = new Client({ name: options?.clientName ?? 'test', version: '1.0.0' }, options?.roots ? { capabilities: { roots: {} } } : undefined);
+      const client = new Client({ name: options?.clientName ?? 'test', version: '1.0.0' }, options?.roots ? { capabilities: { roots: {} } } : undefined);
       if (options?.roots) {
         client.setRequestHandler(ListRootsRequestSchema, async request => {
+          if (options.rootsResponseDelay)
+            await new Promise(resolve => setTimeout(resolve, options.rootsResponseDelay));
           return {
             roots: options.roots,
           };
@@ -101,12 +107,13 @@ export const test = baseTest.extend<TestFixtures & TestOptions, WorkerFixtures>(
           process.stderr.write(data);
         stderrBuffer += data.toString();
       });
+      clients.push(client);
       await client.connect(transport);
       await client.ping();
       return { client, stderr: () => stderrBuffer };
     });
 
-    await client?.close();
+    await Promise.all(clients.map(client => client.close()));
   },
 
   wsEndpoint: async ({ }, use) => {
@@ -123,6 +130,8 @@ export const test = baseTest.extend<TestFixtures & TestOptions, WorkerFixtures>(
     await use({
       endpoint: `http://localhost:${port}`,
       start: async () => {
+        if (browserContext)
+          throw new Error('CDP server already exists');
         browserContext = await chromium.launchPersistentContext(testInfo.outputPath('cdp-user-data-dir'), {
           channel: mcpBrowser,
           headless: true,

tests/roots.spec.ts

@@ -19,13 +19,13 @@ import path from 'path';
 import { pathToFileURL } from 'url';
 
 import { test, expect } from './fixtures.js';
-import { createHash } from '../src/utils.js';
+import { createHash } from '../src/utils/guid.js';
 
 const p = process.platform === 'win32' ? 'c:\\non\\existent\\folder' : '/non/existent/folder';
 
 test('should use separate user data by root path', async ({ startClient, server }, testInfo) => {
   const { client } = await startClient({
-    clientName: 'Visual Studio Code', // Simulate VS Code client, roots only work with it
+    clientName: 'Visual Studio Code',
     roots: [
       {
         name: 'test',
@@ -44,12 +44,11 @@ test('should use separate user data by root path', async ({ startClient, server
   expect(file).toContain(hash);
 });
 
-
-test('check that trace is saved in workspace', async ({ startClient, server, mcpMode }, testInfo) => {
+test('check that trace is saved in workspace', async ({ startClient, server }, testInfo) => {
   const rootPath = testInfo.outputPath('workspace');
   const { client } = await startClient({
     args: ['--save-trace'],
-    clientName: 'Visual Studio Code - Insiders', // Simulate VS Code client, roots only work with it
+    clientName: 'My client',
     roots: [
       {
         name: 'workspace',
@@ -68,3 +67,13 @@ test('check that trace is saved in workspace', async ({ startClient, server, mcp
   const [file] = await fs.promises.readdir(path.join(rootPath, '.playwright-mcp'));
   expect(file).toContain('traces');
 });
+
+test('should list all tools when listRoots is slow', async ({ startClient, server }, testInfo) => {
+  const { client } = await startClient({
+    clientName: 'Another custom client',
+    roots: [],
+    rootsResponseDelay: 1000,
+  });
+  const tools = await client.listTools();
+  expect(tools.tools.length).toBeGreaterThan(20);
+});

tests/wait.spec.ts

@@ -47,6 +47,7 @@ test('browser_wait_for(text)', async ({ client, server }) => {
   expect(await client.callTool({
     name: 'browser_wait_for',
     arguments: { text: 'Text to appear' },
+    code: `await page.getByText("Text to appear").first().waitFor({ state: 'visible' });`,
   })).toHaveResponse({
     pageState: expect.stringContaining(`- generic [ref=e3]: Text to appear`),
   });
@@ -83,7 +84,24 @@ test('browser_wait_for(textGone)', async ({ client, server }) => {
   expect(await client.callTool({
     name: 'browser_wait_for',
     arguments: { textGone: 'Text to disappear' },
+    code: `await page.getByText("Text to disappear").first().waitFor({ state: 'hidden' });`,
   })).toHaveResponse({
     pageState: expect.stringContaining(`- generic [ref=e3]: Text to appear`),
   });
 });
+
+test('browser_wait_for(time)', async ({ client, server }) => {
+  server.setContent('/', `<body><div>Hello World</div></body>`, 'text/html');
+
+  await client.callTool({
+    name: 'browser_navigate',
+    arguments: { url: server.PREFIX },
+  });
+
+  expect(await client.callTool({
+    name: 'browser_wait_for',
+    arguments: { time: 1 },
+  })).toHaveResponse({
+    code: `await new Promise(f => setTimeout(f, 1 * 1000));`,
+  });
+});

utils/check-deps.js

@@ -0,0 +1,179 @@
+#!/usr/bin/env node
+/**
+ * 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.
+ */
+
+// @ts-check
+
+import fs from 'fs';
+import ts from 'typescript';
+import path from 'path';
+
+const __dirname = path.dirname(new URL(import.meta.url).pathname);
+
+const depsCache = {};
+const packageRoot = path.resolve(__dirname, '..');
+
+async function checkDeps() {
+  const deps = new Set();
+  const src = path.join(packageRoot, 'src');
+
+  const program = ts.createProgram({
+    options: {
+      allowJs: true,
+      target: ts.ScriptTarget.ESNext,
+      strict: true,
+    },
+    rootNames: listAllFiles(src),
+  });
+  const sourceFiles = program.getSourceFiles();
+  const errors = [];
+  sourceFiles.filter(x => !x.fileName.includes(path.sep + 'node_modules' + path.sep) && !x.fileName.includes(path.sep + 'bundles' + path.sep)).map(x => visit(x, x.fileName, x.getFullText()));
+
+  if (errors.length) {
+    for (const error of errors)
+      console.log(error);
+    console.log(`--------------------------------------------------------`);
+    console.log(`Changing the project structure or adding new components?`);
+    console.log(`Update DEPS in ${packageRoot}`);
+    console.log(`--------------------------------------------------------`);
+    process.exit(1);
+  }
+
+  function visit(node, fileName, text) {
+    if (ts.isImportDeclaration(node) && ts.isStringLiteral(node.moduleSpecifier)) {
+      if (node.importClause) {
+        if (node.importClause.isTypeOnly)
+          return;
+        if (node.importClause.namedBindings && ts.isNamedImports(node.importClause.namedBindings)) {
+          if (node.importClause.namedBindings.elements.every(e => e.isTypeOnly))
+            return;
+        }
+      }
+      const importName = node.moduleSpecifier.text;
+      let importPath;
+      if (importName.startsWith('.'))
+        importPath = path.resolve(path.dirname(fileName), importName);
+
+      const mergedDeps = calculateDeps(fileName);
+      if (mergedDeps.includes('***'))
+        return;
+      if (importPath) {
+        if (!fs.existsSync(importPath)) {
+          if (fs.existsSync(importPath + '.ts'))
+            importPath = importPath + '.ts';
+          else if (fs.existsSync(importPath + '.tsx'))
+            importPath = importPath + '.tsx';
+          else if (fs.existsSync(importPath + '.d.ts'))
+            importPath = importPath + '.d.ts';
+        }
+
+        if (!allowImport(fileName, importPath, mergedDeps))
+          errors.push(`Disallowed import ${path.relative(packageRoot, importPath)} in ${path.relative(packageRoot, fileName)}`);
+        return;
+      }
+
+      const fullStart = node.getFullStart();
+      const commentRanges = ts.getLeadingCommentRanges(text, fullStart);
+      for (const range of commentRanges || []) {
+          const comment = text.substring(range.pos, range.end);
+          if (comment.includes('@no-check-deps'))
+            return;
+      }
+
+      if (importName.startsWith('@'))
+        deps.add(importName.split('/').slice(0, 2).join('/'));
+      else
+        deps.add(importName.split('/')[0]);
+    }
+    ts.forEachChild(node, x => visit(x, fileName, text));
+  }
+
+  function calculateDeps(from) {
+    const fromDirectory = path.dirname(from);
+    let depsDirectory = fromDirectory;
+    while (depsDirectory.startsWith(packageRoot) && !depsCache[depsDirectory] && !fs.existsSync(path.join(depsDirectory, 'DEPS.list')))
+      depsDirectory = path.dirname(depsDirectory);
+    if (!depsDirectory.startsWith(packageRoot))
+      return [];
+
+    let deps = depsCache[depsDirectory];
+    if (!deps) {
+      const depsListFile = path.join(depsDirectory, 'DEPS.list');
+      deps = {};
+      let group = [];
+      for (const line of fs.readFileSync(depsListFile, 'utf-8').split('\n').filter(Boolean).filter(l => !l.startsWith('#'))) {
+        const groupMatch = line.match(/\[(.*)\]/);
+        if (groupMatch) {
+          group = [];
+          deps[groupMatch[1]] = group;
+          continue;
+        }
+        if (line === '***')
+          group.push('***');
+        else
+          group.push(path.resolve(depsDirectory, line));
+      }
+      depsCache[depsDirectory] = deps;
+    }
+
+    return [...(deps['*'] || []), ...(deps[path.relative(depsDirectory, from)] || [])]
+  }
+
+  function allowImport(from, to, mergedDeps) {
+    const fromDirectory = path.dirname(from);
+    const toDirectory = isDirectory(to) ? to : path.dirname(to);
+    if (to === toDirectory)
+      to = path.join(to, 'index.ts');
+    if (fromDirectory === toDirectory)
+      return true;
+
+    for (const dep of mergedDeps) {
+      if (dep === '***')
+        return true;
+      if (to === dep || toDirectory === dep)
+        return true;
+      if (dep.endsWith('**')) {
+        const parent = dep.substring(0, dep.length - 2);
+        if (to.startsWith(parent))
+          return true;
+      }
+    }
+    return false;
+  }
+}
+
+function listAllFiles(dir) {
+  const dirs = fs.readdirSync(dir, { withFileTypes: true });
+  const result = [];
+  dirs.forEach(d => {
+    const res = path.resolve(dir, d.name);
+    if (d.isDirectory())
+      result.push(...listAllFiles(res));
+    else
+      result.push(res);
+  });
+  return result;
+}
+
+checkDeps().catch(e => {
+  console.error(e && e.stack ? e.stack : e);
+  process.exit(1);
+});
+
+function isDirectory(dir) {
+  return fs.existsSync(dir) && fs.statSync(dir).isDirectory();
+}

utils/set-version.js

@@ -0,0 +1,68 @@
+#!/usr/bin/env node
+/**
+ * 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.
+ */
+
+// @ts-check
+
+import fs from 'fs';
+import path from 'path';
+import child_process from 'child_process';
+import { argv } from 'process';
+
+const __dirname = path.dirname(new URL(import.meta.url).pathname);
+
+const readJSON = async (filePath) => JSON.parse(await fs.promises.readFile(filePath, 'utf8'));
+const writeJSON = async (filePath, json) => {
+  await fs.promises.writeFile(filePath, JSON.stringify(json, null, 2) + '\n');
+}
+
+async function updatePackageJSON(dir, version) {
+  const packageJSONPath = path.join(dir, 'package.json');
+  const packageJSON = await readJSON(packageJSONPath);
+  console.log(`Updating ${packageJSONPath} to version ${version}`);
+  packageJSON.version = version;
+  await writeJSON(packageJSONPath, packageJSON);
+
+  // Run npm i to update package-lock.json
+  child_process.execSync('npm i', {
+    cwd: dir
+  });
+}
+
+async function updateExtensionManifest(dir, version) {
+  const manifestPath = path.join(dir, 'manifest.json');
+  const manifest = await readJSON(manifestPath);
+  console.log(`Updating ${manifestPath} to version ${version}`);
+  manifest.version = version;
+  await writeJSON(manifestPath, manifest);
+}
+
+async function setVersion(version) {
+  if (version.startsWith('v'))
+    throw new Error('version must not start with "v"');
+
+  const packageRoot = path.join(__dirname, '..');
+  await updatePackageJSON(packageRoot, version)
+  await updatePackageJSON(path.join(packageRoot, 'extension'), version)
+  await updateExtensionManifest(path.join(packageRoot, 'extension'), version)
+}
+
+if (argv.length !== 3) {
+  console.error('Usage: set-version <version>');
+  process.exit(1);
+}
+
+setVersion(argv[2]);