diff --git a/packages/dashboard/src/dashboard.tsx b/packages/dashboard/src/dashboard.tsx
index 3324570d15417..e987de6ddbc20 100644
--- a/packages/dashboard/src/dashboard.tsx
+++ b/packages/dashboard/src/dashboard.tsx
@@ -19,8 +19,7 @@ import './dashboard.css';
 import { navigate } from './index';
 import { DashboardClient } from './dashboardClient';
 import { asLocator } from '@isomorphic/locatorGenerators';
-import { SplitView } from '@web/components/splitView';
-import { ChevronLeftIcon, ChevronRightIcon, CloseIcon, PlusIcon, ReloadIcon, PickLocatorIcon, InspectorPanelIcon } from './icons';
+import { ChevronLeftIcon, ChevronRightIcon, CloseIcon, PlusIcon, ReloadIcon, PickLocatorIcon } from './icons';
 import { SettingsButton } from './settingsView';
 
 import type { DashboardClientChannel } from './dashboardClient';
@@ -43,7 +42,6 @@ export const Dashboard: React.FC<{ wsUrl?: string }> = ({ wsUrl }) => {
   const [tabs, setTabs] = React.useState<Tab[] | null>(null);
   const [url, setUrl] = React.useState('');
   const [frame, setFrame] = React.useState<DashboardChannelEvents['frame']>();
-  const [showInspector, setShowInspector] = React.useState(false);
   const [pickingTabId, setPickingTabId] = React.useState<string | null>(null);
   const [locatorToast, setLocatorToast] = React.useState<{ text: string; timer: ReturnType<typeof setTimeout> }>();
 
@@ -103,7 +101,6 @@ export const Dashboard: React.FC<{ wsUrl?: string }> = ({ wsUrl }) => {
       setChannel(undefined);
       setInteractive(false);
       setPickingTabId(null);
-      setShowInspector(false);
     };
 
     return () => {
@@ -272,7 +269,6 @@ export const Dashboard: React.FC<{ wsUrl?: string }> = ({ wsUrl }) => {
             onClick={() => {
               channel?.cancelPickLocator();
               setPickingTabId(null);
-              setShowInspector(false);
               setInteractive(false);
             }}
           >
@@ -334,66 +330,40 @@ export const Dashboard: React.FC<{ wsUrl?: string }> = ({ wsUrl }) => {
       >
         <PickLocatorIcon />
       </button>
-      {selectedTab?.inspectorUrl && (
-        <button
-          className={'nav-btn' + (showInspector ? ' active-toggle' : '')}
-          title='Chrome DevTools'
-          aria-pressed={showInspector}
-          disabled={!channel}
-          onClick={() => {
-            setInteractive(true);
-            setShowInspector(!showInspector);
-          }}
-        >
-          <InspectorPanelIcon />
-        </button>
-      )}
     </div>
 
     {/* Viewport */}
     <div className='viewport-wrapper'>
-      <SplitView
-        orientation='horizontal'
-        sidebarSize={500}
-        minSidebarSize={300}
-        settingName='devtoolsInspector'
-        sidebarHidden={!showInspector || !selectedTab?.inspectorUrl}
-        main={<div className='viewport-main'>
-          <div
-            ref={screenRef}
-            className='screen'
-            tabIndex={0}
-            style={{ display: frame ? '' : 'none' }}
-            onMouseDown={onScreenMouseDown}
-            onMouseUp={onScreenMouseUp}
-            onMouseMove={onScreenMouseMove}
-            onWheel={onScreenWheel}
-            onKeyDown={onScreenKeyDown}
-            onKeyUp={onScreenKeyUp}
-            onContextMenu={e => e.preventDefault()}
-          >
-            <img
-              ref={displayRef}
-              id='display'
-              className='display'
-              alt='screencast'
-              src={frame ? 'data:image/jpeg;base64,' + frame.data : undefined}
-            />
-            {locatorToast
-              ? <div className='screen-toast visible'>Copied: <code>{locatorToast.text}</code></div>
-              : picking
-                ? <div className='screen-toast visible'>Click an element to pick its locator</div>
-                : null
-            }
-          </div>
-          {overlayText && <div className={'screen-overlay' + (frame ? ' has-frame' : '')}><span>{overlayText}</span></div>}
-        </div>}
-        sidebar={<iframe
-          className='inspector-frame'
-          src={selectedTab?.inspectorUrl || ''}
-          title='Chrome DevTools'
-        />}
-      />
+      <div className='viewport-main'>
+        <div
+          ref={screenRef}
+          className='screen'
+          tabIndex={0}
+          style={{ display: frame ? '' : 'none' }}
+          onMouseDown={onScreenMouseDown}
+          onMouseUp={onScreenMouseUp}
+          onMouseMove={onScreenMouseMove}
+          onWheel={onScreenWheel}
+          onKeyDown={onScreenKeyDown}
+          onKeyUp={onScreenKeyUp}
+          onContextMenu={e => e.preventDefault()}
+        >
+          <img
+            ref={displayRef}
+            id='display'
+            className='display'
+            alt='screencast'
+            src={frame ? 'data:image/jpeg;base64,' + frame.data : undefined}
+          />
+          {locatorToast
+            ? <div className='screen-toast visible'>Copied: <code>{locatorToast.text}</code></div>
+            : picking
+              ? <div className='screen-toast visible'>Click an element to pick its locator</div>
+              : null
+          }
+        </div>
+        {overlayText && <div className={'screen-overlay' + (frame ? ' has-frame' : '')}><span>{overlayText}</span></div>}
+      </div>
     </div>
   </div>);
 };
diff --git a/packages/dashboard/src/dashboardChannel.ts b/packages/dashboard/src/dashboardChannel.ts
index 094d61664ab70..b5f6c61c0f074 100644
--- a/packages/dashboard/src/dashboardChannel.ts
+++ b/packages/dashboard/src/dashboardChannel.ts
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-export type Tab = { pageId: string; title: string; url: string; selected: boolean; inspectorUrl?: string };
+export type Tab = { pageId: string; title: string; url: string; selected: boolean };
 
 export type DashboardChannelEvents = {
   frame: { data: string; viewportWidth: number; viewportHeight: number };
diff --git a/packages/playwright-core/src/server/android/android.ts b/packages/playwright-core/src/server/android/android.ts
index 801ae85cfed3a..b1b57da6e6bec 100644
--- a/packages/playwright-core/src/server/android/android.ts
+++ b/packages/playwright-core/src/server/android/android.ts
@@ -299,7 +299,7 @@ export class AndroidDevice extends SdkObject {
       '--disable-fre',
       '--no-default-browser-check',
       `--remote-debugging-socket-name=${socketName}`,
-      ...chromiumSwitches(undefined, undefined, true),
+      ...chromiumSwitches({ android: true }),
       ...this._innerDefaultArgs(options)
     ];
     return chromeArguments;
diff --git a/packages/playwright-core/src/server/bidi/bidiChromium.ts b/packages/playwright-core/src/server/bidi/bidiChromium.ts
index 9cdd1da833233..1df6751f9b13b 100644
--- a/packages/playwright-core/src/server/bidi/bidiChromium.ts
+++ b/packages/playwright-core/src/server/bidi/bidiChromium.ts
@@ -114,7 +114,7 @@ export class BidiChromium extends BrowserType {
       throw new Error('Playwright manages remote debugging connection itself.');
     if (args.find(arg => !arg.startsWith('-')))
       throw new Error('Arguments can not specify page to be opened');
-    const chromeArguments = [...chromiumSwitches(options.assistantMode)];
+    const chromeArguments = [...chromiumSwitches()];
 
     if (os.platform() === 'darwin') {
       // See https://issues.chromium.org/issues/40277080
diff --git a/packages/playwright-core/src/server/chromium/chromium.ts b/packages/playwright-core/src/server/chromium/chromium.ts
index 19026aa6734df..206e34b5adb8d 100644
--- a/packages/playwright-core/src/server/chromium/chromium.ts
+++ b/packages/playwright-core/src/server/chromium/chromium.ts
@@ -330,7 +330,7 @@ export class Chromium extends BrowserType {
       throw new Error('Playwright manages remote debugging connection itself.');
     if (args.find(arg => !arg.startsWith('-')))
       throw new Error('Arguments can not specify page to be opened');
-    const chromeArguments = [...chromiumSwitches(options.assistantMode, options.channel)];
+    const chromeArguments = [...chromiumSwitches()];
 
     // See https://issues.chromium.org/issues/40277080
     chromeArguments.push('--enable-unsafe-swiftshader');
diff --git a/packages/playwright-core/src/server/chromium/chromiumSwitches.ts b/packages/playwright-core/src/server/chromium/chromiumSwitches.ts
index 946630f9accf1..af60e7c2b5b83 100644
--- a/packages/playwright-core/src/server/chromium/chromiumSwitches.ts
+++ b/packages/playwright-core/src/server/chromium/chromiumSwitches.ts
@@ -17,7 +17,7 @@
 
 // No dependencies as it is used from the Electron loader.
 
-const disabledFeatures = (assistantMode?: boolean) => [
+const disabledFeatures = [
   // See https://github.com/microsoft/playwright/issues/14047
   'AvoidUnnecessaryBeforeUnloadCheckSync',
   // See https://github.com/microsoft/playwright/issues/38568
@@ -44,14 +44,13 @@ const disabledFeatures = (assistantMode?: boolean) => [
   'RenderDocument',
   // Prevents downloading optimization hints on startup.
   'OptimizationHints',
-  assistantMode ? 'AutomationControlled' : '',
   // Disables forced sign-in in Edge.
   'msForceBrowserSignIn',
   // Disables updating the preferred version in LaunchServices preferences on mac.
   'msEdgeUpdateLaunchServicesPreferredVersion',
 ].filter(Boolean);
 
-export const chromiumSwitches = (assistantMode?: boolean, channel?: string, android?: boolean) => [
+export const chromiumSwitches = (options?: { android?: boolean }) => [
   '--disable-field-trial-config', // https://source.chromium.org/chromium/chromium/src/+/main:testing/variations/README.md
   '--disable-background-networking',
   '--disable-background-timer-throttling',
@@ -66,7 +65,7 @@ export const chromiumSwitches = (assistantMode?: boolean, channel?: string, andr
   '--disable-dev-shm-usage',
   '--disable-edgeupdater', // Disables Edge-specific updater on mac.
   '--disable-extensions',
-  '--disable-features=' + disabledFeatures(assistantMode).join(','),
+  '--disable-features=' + disabledFeatures.join(','),
   process.env.PLAYWRIGHT_LEGACY_SCREENSHOT ? '' : '--enable-features=CDPScreenshotNewSurface',
   '--allow-pre-commit-input',
   '--disable-hang-monitor',
@@ -88,12 +87,11 @@ export const chromiumSwitches = (assistantMode?: boolean, channel?: string, andr
   '--unsafely-disable-devtools-self-xss-warnings',
   // Edge can potentially restart on Windows (msRelaunchNoCompatLayer) which looses its file descriptors (stdout/stderr) and CDP (3/4). Disable until fixed upstream.
   '--edge-skip-compat-layer-relaunch',
-  assistantMode ? '' : '--enable-automation',
   // This disables Chrome for Testing infobar that is visible in the persistent context.
   // The switch is ignored everywhere else, including Chromium/Chrome/Edge.
   '--disable-infobars',
   // Less annoying popups.
   '--disable-search-engine-choice-screen',
   // Prevents the "three dots" menu crash in IdentityManager::HasPrimaryAccount for ephemeral contexts.
-  android ? '' : '--disable-sync',
+  options?.android ? '' : '--disable-sync',
 ].filter(Boolean);
diff --git a/packages/playwright-core/src/tools/dashboard/dashboardApp.ts b/packages/playwright-core/src/tools/dashboard/dashboardApp.ts
index 97665054b37d9..075801ac06da3 100644
--- a/packages/playwright-core/src/tools/dashboard/dashboardApp.ts
+++ b/packages/playwright-core/src/tools/dashboard/dashboardApp.ts
@@ -25,7 +25,7 @@ import { gracefullyProcessExitDoNotHang } from '@utils/processLauncher';
 import { libPath } from '../../package';
 import { playwright } from '../../inprocess';
 import { findChromiumChannelBestEffort, registryDirectory } from '../../server/registry/index';
-import { CDPConnection, DashboardConnection } from './dashboardController';
+import { DashboardConnection } from './dashboardController';
 import { serverRegistry } from '../../serverRegistry';
 import { connectToBrowserAcrossVersions } from '../utils/connect';
 import { createClientInfo } from '../cli-client/registry';
@@ -147,21 +147,7 @@ async function innerOpenDashboardApp(): Promise<api.Page> {
       throw new Error('Unsupported WebSocket URL: ' + url.toString());
     const browserDescriptor = serverRegistry.readDescriptor(guid);
 
-    const cdpPageId = url.searchParams.get('cdpPageId');
-    if (cdpPageId) {
-      const connection = browserGuidToDashboardConnection.get(guid);
-      if (!connection)
-        throw new Error('CDP connection not found for session: ' + guid);
-      const page = connection.pageForId(cdpPageId);
-      if (!page)
-        throw new Error('Page not found for page ID: ' + cdpPageId);
-      return new CDPConnection(page);
-    }
-
-    const cdpUrl = new URL(httpServer.urlPrefix('human-readable'));
-    cdpUrl.pathname = httpServer.wsGuid()!;
-    cdpUrl.searchParams.set('guid', guid);
-    const connection = new DashboardConnection(browserDescriptor, cdpUrl, () => browserGuidToDashboardConnection.delete(guid));
+    const connection = new DashboardConnection(browserDescriptor, () => browserGuidToDashboardConnection.delete(guid));
     browserGuidToDashboardConnection.set(guid, connection);
     return connection;
   });
diff --git a/packages/playwright-core/src/tools/dashboard/dashboardController.ts b/packages/playwright-core/src/tools/dashboard/dashboardController.ts
index 9fb79198ccc65..c2736a86590fc 100644
--- a/packages/playwright-core/src/tools/dashboard/dashboardController.ts
+++ b/packages/playwright-core/src/tools/dashboard/dashboardController.ts
@@ -36,16 +36,14 @@ export class DashboardConnection implements Transport, DashboardChannel {
   private _eventListeners = new Map<string, Set<Function>>();
 
   private _browserDescriptor: BrowserDescriptor;
-  private _cdpUrl: URL;
   private _onclose: () => void;
 
   private _initPromise?: Promise<void>;
   private _context!: api.BrowserContext;
   private _browser?: api.Browser;
 
-  constructor(browserDescriptor: BrowserDescriptor, cdpUrl: URL, onclose: () => void) {
+  constructor(browserDescriptor: BrowserDescriptor, onclose: () => void) {
     this._browserDescriptor = browserDescriptor;
-    this._cdpUrl = cdpUrl;
     this._onclose = onclose;
   }
 
@@ -242,9 +240,6 @@ export class DashboardConnection implements Transport, DashboardChannel {
 
   private async _tabList(): Promise<Tab[]> {
     const pages = this._context.pages();
-    if (pages.length === 0)
-      return [];
-    const devtoolsUrl = await this._devtoolsUrl(pages[0]);
     return await Promise.all(pages.map(async page => {
       const title = await page.title();
       return {
@@ -252,41 +247,15 @@ export class DashboardConnection implements Transport, DashboardChannel {
         title,
         url: page.url(),
         selected: page === this.selectedPage,
-        inspectorUrl: devtoolsUrl ? await this._pageInspectorUrl(page, devtoolsUrl) : 'data:text/plain,Dashboard only supported in Chromium based browsers',
       };
     }));
   }
 
-  pageForId(pageId: string) {
-    return this._context?.pages().find(p => this._pageId(p) === pageId);
-  }
-
   private _pageId(p: api.Page): string {
     // eslint-disable-next-line no-restricted-syntax -- _guid is very conservative.
     return (p as any)._guid;
   }
 
-  private async _devtoolsUrl(page: api.Page) {
-    // eslint-disable-next-line no-restricted-syntax -- cdpPort is not in the public LaunchOptions type, fine if regresses.
-    const cdpPort = (this._browserDescriptor.browser.launchOptions as any).cdpPort;
-    if (cdpPort)
-      return new URL(`http://localhost:${cdpPort}/devtools/`);
-
-    const browserRevision = await getBrowserRevision(page);
-    if (!browserRevision)
-      return null;
-    return new URL(`https://chrome-devtools-frontend.appspot.com/serve_rev/${browserRevision}/`);
-  }
-
-  private async _pageInspectorUrl(page: api.Page, devtoolsUrl: URL): Promise<string | undefined> {
-    const inspector = new URL('./devtools_app.html', devtoolsUrl);
-    const cdp = new URL(this._cdpUrl);
-    cdp.searchParams.set('cdpPageId', this._pageId(page));
-    inspector.searchParams.set('ws', `${cdp.host}${cdp.pathname}${cdp.search}`);
-    const url = inspector.toString();
-    return url;
-  }
-
   private _sendTabList() {
     this._tabList().then(tabs => this._emit('tabs', { tabs }));
   }
@@ -298,59 +267,3 @@ export class DashboardConnection implements Transport, DashboardChannel {
     this._emit('frame', { data, viewportWidth, viewportHeight });
   }
 }
-
-async function getBrowserRevision(page: api.Page): Promise<string | null> {
-  try {
-    const session = await page.context().newCDPSession(page);
-    const version = await session.send('Browser.getVersion');
-    await session.detach();
-    return version.revision;
-  } catch (error) {
-    return null;
-  }
-}
-
-export class CDPConnection implements Transport {
-  sendEvent?: (method: string, params: any) => void;
-  close?: () => void;
-
-  private _page: api.Page;
-  private _rawSession: api.CDPSession | null = null;
-  private _rawSessionListeners: { dispose: () => Promise<void> }[] = [];
-  private _initializePromise: Promise<void> | undefined;
-
-  constructor(page: api.Page) {
-    this._page = page;
-  }
-
-  onconnect() {
-    this._initializePromise = this._initializeRawSession();
-  }
-
-  async dispatch(method: string, params: any): Promise<any> {
-    await this._initializePromise;
-    if (!this._rawSession)
-      throw new Error('CDP session is not initialized');
-    return await this._rawSession.send(method as Parameters<api.CDPSession['send']>[0], params);
-  }
-
-  onclose() {
-    this._rawSessionListeners.forEach(listener => listener.dispose());
-    this._rawSession?.detach().catch(() => {});
-    this._rawSession = null;
-    this._initializePromise = undefined;
-  }
-
-  private async _initializeRawSession() {
-    const session = await this._page.context().newCDPSession(this._page);
-    this._rawSession = session;
-    this._rawSessionListeners = [
-      eventsHelper.addEventListener(session, 'event', ({ method, params }) => {
-        this.sendEvent?.(method, params);
-      }),
-      eventsHelper.addEventListener(session, 'close', () => {
-        this.close?.();
-      }),
-    ];
-  }
-}
diff --git a/packages/playwright-core/src/tools/mcp/browserFactory.ts b/packages/playwright-core/src/tools/mcp/browserFactory.ts
index 00354462a95af..2e8c190c04d05 100644
--- a/packages/playwright-core/src/tools/mcp/browserFactory.ts
+++ b/packages/playwright-core/src/tools/mcp/browserFactory.ts
@@ -16,7 +16,6 @@
 
 import crypto from 'crypto';
 import fs from 'fs';
-import net from 'net';
 import path from 'path';
 
 import { playwright } from '../../inprocess';
@@ -86,7 +85,6 @@ function browserInfo(browser: playwrightTypes.Browser, config: FullConfig): Brow
 
 async function createIsolatedBrowser(config: FullConfig, clientInfo: ClientInfo): Promise<playwrightTypes.Browser> {
   testDebug('create browser (isolated)');
-  await injectCdpPort(config.browser);
   const browserType = playwright[config.browser.browserName];
   const tracesDir = await computeTracesDir(config, clientInfo);
   const browser = await browserType.launch({
@@ -138,7 +136,6 @@ async function createRemoteBrowser(config: FullConfig): Promise<BrowserWithInfo>
 
 async function createPersistentBrowser(config: FullConfig, clientInfo: ClientInfo): Promise<playwrightTypes.Browser> {
   testDebug('create browser (persistent)');
-  await injectCdpPort(config.browser);
   const userDataDir = config.browser.userDataDir ?? await createUserDataDir(config, clientInfo);
   const tracesDir = await computeTracesDir(config, clientInfo);
 
@@ -187,23 +184,6 @@ async function createUserDataDir(config: FullConfig, clientInfo: ClientInfo) {
   return result;
 }
 
-async function injectCdpPort(browserConfig: FullConfig['browser']) {
-  if (browserConfig.browserName === 'chromium')
-    // eslint-disable-next-line no-restricted-syntax
-    (browserConfig.launchOptions as any).cdpPort = await findFreePort();
-}
-
-async function findFreePort(): Promise<number> {
-  return new Promise((resolve, reject) => {
-    const server = net.createServer();
-    server.listen(0, '127.0.0.1', () => {
-      const { port } = server.address() as net.AddressInfo;
-      server.close(() => resolve(port));
-    });
-    server.on('error', reject);
-  });
-}
-
 function createHash(data: string): string {
   return crypto.createHash('sha256').update(data).digest('hex').slice(0, 7);
 }
diff --git a/tests/mcp/dashboard.spec.ts b/tests/mcp/dashboard.spec.ts
index 22e4712c10703..fe517b82d2285 100644
--- a/tests/mcp/dashboard.spec.ts
+++ b/tests/mcp/dashboard.spec.ts
@@ -31,20 +31,6 @@ test('should show browser session chip', async ({ cli, server, openDashboard })
   await expect(chips).toHaveCount(1);
 });
 
-test('should show devtools sidebar', async ({ cli, server, openDashboard, mcpBrowser }) => {
-  test.skip(!['chrome', 'msedge', 'chromium'].includes(mcpBrowser!), 'DevTools sidebar requires CDP, only available in Chromium');
-
-  await cli('open', server.EMPTY_PAGE);
-
-  const dashboard = await openDashboard();
-  await dashboard.locator('.session-chip').click();
-
-  const devToolsButton = dashboard.locator('button.nav-btn[title="Chrome DevTools"]');
-  await expect(dashboard.locator('.inspector-frame')).not.toBeVisible();
-  await devToolsButton.click();
-  await expect(dashboard.locator('.inspector-frame')).toBeVisible();
-});
-
 test('should show current workspace sessions first', async ({ cli, server, openDashboard }) => {
   const wsA = test.info().outputPath('workspace-a');
   const wsB = test.info().outputPath('workspace-b');
diff --git a/tests/mcp/webdriver.spec.ts b/tests/mcp/webdriver.spec.ts
deleted file mode 100644
index 99496cb187864..0000000000000
--- a/tests/mcp/webdriver.spec.ts
+++ /dev/null
@@ -1,40 +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 { test, expect } from './fixtures';
-
-test('do not falsely advertise user agent as a test driver', async ({ client, server, mcpBrowser }) => {
-  test.skip(mcpBrowser === 'firefox');
-  test.skip(mcpBrowser === 'webkit');
-  server.setRoute('/', (req, res) => {
-    res.writeHead(200, { 'Content-Type': 'text/html' });
-    res.end(`
-      <body></body>
-      <script>
-        document.body.textContent = 'webdriver: ' + navigator.webdriver;
-      </script>
-    `);
-  });
-
-  expect(await client.callTool({
-    name: 'browser_navigate',
-    arguments: {
-      url: server.PREFIX,
-    },
-  })).toHaveResponse({
-    snapshot: expect.stringContaining(`webdriver: false`),
-  });
-});