diff --git a/packages/.eslintrc.js b/packages/.eslintrc.js
new file mode 100644
index 0000000000..959d04700a
--- /dev/null
+++ b/packages/.eslintrc.js
@@ -0,0 +1,16 @@
+module.exports = {
+  "extends": "../.eslintrc.js",
+  /**
+   * ESLint rules
+   *
+   * All available rules: http://eslint.org/docs/rules/
+   *
+   * Rules take the following form:
+   *   "rule-name", [severity, { opts }]
+   * Severity: 2 == error, 1 == warning, 0 == off.
+   */
+  "rules": {
+      "no-console": 2,
+      "no-debugger": 2
+  }
+};
diff --git a/packages/playwright-core/src/.eslintrc.js b/packages/playwright-core/src/.eslintrc.js
deleted file mode 100644
index ee857ae4fc..0000000000
--- a/packages/playwright-core/src/.eslintrc.js
+++ /dev/null
@@ -1,16 +0,0 @@
-module.exports = {
-    "extends": "../../../.eslintrc.js",
-    /**
-     * ESLint rules
-     *
-     * All available rules: http://eslint.org/docs/rules/
-     *
-     * Rules take the following form:
-     *   "rule-name", [severity, { opts }]
-     * Severity: 2 == error, 1 == warning, 0 == off.
-     */
-    "rules": {
-        "no-console": [2, { "allow": ["warn", "error", "assert", "timeStamp", "time", "timeEnd"] }],
-        "no-debugger": 0
-    }
-};
diff --git a/packages/playwright-core/src/client/browserContext.ts b/packages/playwright-core/src/client/browserContext.ts
index 64e71a65ab..5356b6bbd5 100644
--- a/packages/playwright-core/src/client/browserContext.ts
+++ b/packages/playwright-core/src/client/browserContext.ts
@@ -21,14 +21,14 @@ import * as network from './network';
 import * as channels from '../protocol/channels';
 import fs from 'fs';
 import { ChannelOwner } from './channelOwner';
-import { deprecate, evaluationScript } from './clientHelper';
+import { evaluationScript } from './clientHelper';
 import { Browser } from './browser';
 import { Worker } from './worker';
 import { Events } from './events';
 import { TimeoutSettings } from '../utils/timeoutSettings';
 import { Waiter } from './waiter';
 import { URLMatch, Headers, WaitForEventOptions, BrowserContextOptions, StorageState, LaunchOptions } from './types';
-import { isUnderTest, headersObjectToArray, mkdirIfNeeded } from '../utils/utils';
+import { headersObjectToArray, mkdirIfNeeded } from '../utils/utils';
 import { isSafeCloseError } from '../utils/errors';
 import * as api from '../../types/types';
 import * as structs from '../../types/structs';
@@ -231,8 +231,6 @@ export class BrowserContext extends ChannelOwner<channels.BrowserContextChannel>
   }
 
   async setHTTPCredentials(httpCredentials: { username: string, password: string } | null): Promise<void> {
-    if (!isUnderTest())
-      deprecate(`context.setHTTPCredentials`, `warning: method |context.setHTTPCredentials()| is deprecated. Instead of changing credentials, create another browser context with new credentials.`);
     await this._channel.setHTTPCredentials({ httpCredentials: httpCredentials || undefined });
   }
 
diff --git a/packages/playwright-core/src/client/browserType.ts b/packages/playwright-core/src/client/browserType.ts
index 176b52933e..344044360a 100644
--- a/packages/playwright-core/src/client/browserType.ts
+++ b/packages/playwright-core/src/client/browserType.ts
@@ -134,6 +134,7 @@ export class BrowserType extends ChannelOwner<channels.BrowserTypeChannel> imple
       connection.markAsRemote();
       connection.on('close', closePipe);
 
+      let closeError: string | undefined;
       const onPipeClosed = () => {
         // Emulate all pages, contexts and the browser closing upon disconnect.
         for (const context of browser?.contexts() || []) {
@@ -142,7 +143,7 @@ export class BrowserType extends ChannelOwner<channels.BrowserTypeChannel> imple
           context._onClose();
         }
         browser?._didClose();
-        connection.close(kBrowserClosedError);
+        connection.close(closeError || kBrowserClosedError);
       };
       pipe.on('closed', onPipeClosed);
       connection.onmessage = message => pipe.send({ message }).catch(onPipeClosed);
@@ -151,8 +152,7 @@ export class BrowserType extends ChannelOwner<channels.BrowserTypeChannel> imple
         try {
           connection!.dispatch(message);
         } catch (e) {
-          console.error(`Playwright: Connection dispatch error`);
-          console.error(e);
+          closeError = e.toString();
           closePipe();
         }
       });
diff --git a/packages/playwright-core/src/client/clientHelper.ts b/packages/playwright-core/src/client/clientHelper.ts
index 2fc69dbca6..c4e3847d03 100644
--- a/packages/playwright-core/src/client/clientHelper.ts
+++ b/packages/playwright-core/src/client/clientHelper.ts
@@ -19,14 +19,6 @@ import * as types from './types';
 import fs from 'fs';
 import { isString, isRegExp, constructURLBasedOnBaseURL } from '../utils/utils';
 
-const deprecatedHits = new Set();
-export function deprecate(methodName: string, message: string) {
-  if (deprecatedHits.has(methodName))
-    return;
-  deprecatedHits.add(methodName);
-  console.warn(message);
-}
-
 export function envObjectToArray(env: types.Env): { name: string, value: string }[] {
   const result: { name: string, value: string }[] = [];
   for (const name in env) {
diff --git a/packages/playwright-core/src/grid/gridServer.ts b/packages/playwright-core/src/grid/gridServer.ts
index da09d6da4f..41e03a7445 100644
--- a/packages/playwright-core/src/grid/gridServer.ts
+++ b/packages/playwright-core/src/grid/gridServer.ts
@@ -307,6 +307,7 @@ export class GridServer {
           return { error: undefined };
         }).catch(error => {
           this._log('failed to launch agent ' + agent.agentId);
+          // eslint-disable-next-line no-console
           console.error(error);
           agent.closeAgent(WSErrors.AGENT_CREATION_FAILED);
           return { error };
diff --git a/packages/playwright-core/src/server/firefox/firefox.ts b/packages/playwright-core/src/server/firefox/firefox.ts
index abddb56c78..9c6f45d56c 100644
--- a/packages/playwright-core/src/server/firefox/firefox.ts
+++ b/packages/playwright-core/src/server/firefox/firefox.ts
@@ -58,9 +58,7 @@ export class Firefox extends BrowserType {
   }
 
   _defaultArgs(options: types.LaunchOptions, isPersistent: boolean, userDataDir: string): string[] {
-    const { args = [], devtools, headless } = options;
-    if (devtools)
-      console.warn('devtools parameter is not supported as a launch argument in Firefox. You can launch the devtools window manually.');
+    const { args = [], headless } = options;
     const userDataDirArg = args.find(arg => arg.startsWith('-profile') || arg.startsWith('--profile'));
     if (userDataDirArg)
       throw new Error('Pass userDataDir parameter to `browserType.launchPersistentContext(userDataDir, ...)` instead of specifying --profile argument');
diff --git a/packages/playwright-core/src/server/supplements/injected/recorder.ts b/packages/playwright-core/src/server/supplements/injected/recorder.ts
index 2ddfd0604a..9461cd422f 100644
--- a/packages/playwright-core/src/server/supplements/injected/recorder.ts
+++ b/packages/playwright-core/src/server/supplements/injected/recorder.ts
@@ -58,7 +58,7 @@ export class Recorder {
     };
     globalThis._playwrightRefreshOverlay();
     if (params.isUnderTest)
-      console.error('Recorder script ready for test');
+      console.error('Recorder script ready for test'); // eslint-disable-line no-console
   }
 
   private _refreshListenersIfNeeded() {
@@ -240,7 +240,7 @@ export class Recorder {
     const result = activeElement ? generateSelector(this._injectedScript, activeElement) : null;
     this._activeModel = result && result.selector ? result : null;
     if (this._params.isUnderTest)
-      console.error('Highlight updated for test: ' + (result ? result.selector : null));
+      console.error('Highlight updated for test: ' + (result ? result.selector : null)); // eslint-disable-line no-console
   }
 
   private _updateModelForHoveredElement() {
@@ -256,7 +256,7 @@ export class Recorder {
     this._hoveredModel = selector ? { selector, elements } : null;
     this._updateHighlight();
     if (this._params.isUnderTest)
-      console.error('Highlight updated for test: ' + selector);
+      console.error('Highlight updated for test: ' + selector); // eslint-disable-line no-console
   }
 
   private _updateHighlight() {
@@ -400,7 +400,7 @@ export class Recorder {
     if (this._params.isUnderTest) {
       // Serialize all to string as we cannot attribute console message to isolated world
       // in Firefox.
-      console.error('Action performed for test: ' + JSON.stringify({
+      console.error('Action performed for test: ' + JSON.stringify({ // eslint-disable-line no-console
         hovered: this._hoveredModel ? this._hoveredModel.selector : null,
         active: this._activeModel ? this._activeModel.selector : null,
       }));
diff --git a/packages/playwright-core/src/server/supplements/recorder/recorderApp.ts b/packages/playwright-core/src/server/supplements/recorder/recorderApp.ts
index e0e1e5363c..2b9b965c32 100644
--- a/packages/playwright-core/src/server/supplements/recorder/recorderApp.ts
+++ b/packages/playwright-core/src/server/supplements/recorder/recorderApp.ts
@@ -78,7 +78,7 @@ export class RecorderApp extends EventEmitter {
 
     this._page.once('close', () => {
       this.emit('close');
-      this._page.context().close(internalCallMetadata()).catch(e => console.error(e));
+      this._page.context().close(internalCallMetadata()).catch(() => {});
     });
 
     const mainFrame = this._page.mainFrame();
diff --git a/packages/playwright-core/src/server/trace/viewer/traceViewer.ts b/packages/playwright-core/src/server/trace/viewer/traceViewer.ts
index 54a5104a29..cd8765e380 100644
--- a/packages/playwright-core/src/server/trace/viewer/traceViewer.ts
+++ b/packages/playwright-core/src/server/trace/viewer/traceViewer.ts
@@ -28,6 +28,7 @@ import { ProgressController } from '../../progress';
 
 export async function showTraceViewer(traceUrl: string, browserName: string, headless = false, port?: number): Promise<BrowserContext | undefined> {
   if (traceUrl && !traceUrl.startsWith('http://') && !traceUrl.startsWith('https://') && !fs.existsSync(traceUrl)) {
+    // eslint-disable-next-line no-console
     console.error(`Trace file ${traceUrl} does not exist!`);
     process.exit(1);
   }
diff --git a/packages/playwright-core/src/server/webkit/webkit.ts b/packages/playwright-core/src/server/webkit/webkit.ts
index 69bdf9f048..6b8e1b8efb 100644
--- a/packages/playwright-core/src/server/webkit/webkit.ts
+++ b/packages/playwright-core/src/server/webkit/webkit.ts
@@ -46,9 +46,7 @@ export class WebKit extends BrowserType {
   }
 
   _defaultArgs(options: types.LaunchOptions, isPersistent: boolean, userDataDir: string): string[] {
-    const { args = [], proxy, devtools, headless } = options;
-    if (devtools)
-      console.warn('devtools parameter as a launch argument in WebKit is not supported. Also starting Web Inspector manually will terminate the execution in WebKit.');
+    const { args = [], proxy, headless } = options;
     const userDataDirArg = args.find(arg => arg.startsWith('--user-data-dir'));
     if (userDataDirArg)
       throw new Error('Pass userDataDir parameter to `browserType.launchPersistentContext(userDataDir, ...)` instead of specifying --user-data-dir argument');
diff --git a/packages/playwright-core/src/utils/dependencies.ts b/packages/playwright-core/src/utils/dependencies.ts
index 7f18ea3aac..cb6bc509e1 100644
--- a/packages/playwright-core/src/utils/dependencies.ts
+++ b/packages/playwright-core/src/utils/dependencies.ts
@@ -140,7 +140,9 @@ export async function validateDependenciesWindows(windowsExeAndDllDirectories: s
   if (isSupportedWindowsVersion()) {
     throw new Error(message);
   } else {
+    // eslint-disable-next-line no-console
     console.warn(`WARNING: running on unsupported windows version!`);
+    // eslint-disable-next-line no-console
     console.warn(message);
   }
 }
diff --git a/packages/playwright-core/src/utils/httpServer.ts b/packages/playwright-core/src/utils/httpServer.ts
index 0e1a14d08a..f7a3eb52f7 100644
--- a/packages/playwright-core/src/utils/httpServer.ts
+++ b/packages/playwright-core/src/utils/httpServer.ts
@@ -52,7 +52,7 @@ export class HttpServer {
   }
 
   async start(port?: number): Promise<string> {
-    console.assert(!this._urlPrefix, 'server already started');
+    assert(!this._urlPrefix, 'server already started');
     this._server.on('connection', socket => {
       this._activeSockets.add(socket);
       socket.once('close', () => this._activeSockets.delete(socket));
diff --git a/packages/playwright-core/src/utils/verifyNodeJsVersion.ts b/packages/playwright-core/src/utils/verifyNodeJsVersion.ts
index dd57188b40..c5df657648 100644
--- a/packages/playwright-core/src/utils/verifyNodeJsVersion.ts
+++ b/packages/playwright-core/src/utils/verifyNodeJsVersion.ts
@@ -19,6 +19,7 @@ const semver = currentNodeVersion.split('.');
 const [major] = [+semver[0]];
 
 if (major < 12) {
+  // eslint-disable-next-line no-console
   console.error(
       'You are running Node.js ' +
       currentNodeVersion +
diff --git a/packages/playwright-core/src/web/traceViewer/sw.ts b/packages/playwright-core/src/web/traceViewer/sw.ts
index 6ed800ea24..6ef5445752 100644
--- a/packages/playwright-core/src/web/traceViewer/sw.ts
+++ b/packages/playwright-core/src/web/traceViewer/sw.ts
@@ -73,6 +73,7 @@ async function doFetch(event: FetchEvent): Promise<Response> {
           headers: { 'Content-Type': 'application/json' }
         });
       } catch (error: unknown) {
+        // eslint-disable-next-line no-console
         console.error(error);
         const traceFileName = url.searchParams.get('traceFileName')!;
         return new Response(JSON.stringify({
diff --git a/packages/playwright-test/src/cli.ts b/packages/playwright-test/src/cli.ts
index f930ecf069..699807a53c 100644
--- a/packages/playwright-test/src/cli.ts
+++ b/packages/playwright-test/src/cli.ts
@@ -121,7 +121,7 @@ async function runTests(args: string[], opts: { [key: string]: any }) {
     process.env.PWDEBUG = '1';
   }
 
-  const runner = new Runner(overrides, { defaultConfig, printResolvedConfig: process.stdout.isTTY });
+  const runner = new Runner(overrides, { defaultConfig });
 
   // When no --config option is passed, let's look for the config file in the current directory.
   const configFile = opts.config ? path.resolve(process.cwd(), opts.config) : process.cwd();
diff --git a/packages/playwright-test/src/runner.ts b/packages/playwright-test/src/runner.ts
index ce41ff9a91..67cb3e2a60 100644
--- a/packages/playwright-test/src/runner.ts
+++ b/packages/playwright-test/src/runner.ts
@@ -54,24 +54,18 @@ type RunOptions = {
 
 export class Runner {
   private _loader: Loader;
-  private _printResolvedConfig: boolean;
   private _reporter!: Reporter;
   private _didBegin = false;
   private _internalGlobalSetups: Array<InternalGlobalSetupFunction> = [];
 
-  constructor(configOverrides: Config, options: { defaultConfig?: Config, printResolvedConfig?: boolean } = {}) {
-    this._printResolvedConfig = !!options.printResolvedConfig;
+  constructor(configOverrides: Config, options: { defaultConfig?: Config } = {}) {
     this._loader = new Loader(options.defaultConfig || {}, configOverrides);
   }
 
   async loadConfigFromFile(configFileOrDirectory: string): Promise<Config> {
     const loadConfig = async (configFile: string) => {
-      if (fs.existsSync(configFile)) {
-        if (this._printResolvedConfig)
-          console.log(`Using config at ` + configFile);
-        const config = await this._loader.loadConfigFile(configFile);
-        return config;
-      }
+      if (fs.existsSync(configFile))
+        return await this._loader.loadConfigFile(configFile);
     };
 
     const loadConfigFromDirectory = async (directory: string) => {