feat: enable isolated mode by default for better session isolation

- Set browser.isolated = true as default configuration
- Ensures each MCP session gets its own isolated browser context
- Prevents data sharing between different client sessions
- Combined with headed mode for optimal user experience

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/config.ts

@@ -53,9 +53,10 @@ export type CLIOptions = {
 const defaultConfig: FullConfig = {
   browser: {
     browserName: 'chromium',
+    isolated: true,
     launchOptions: {
       channel: 'chrome',
-      headless: os.platform() === 'linux' && !process.env.DISPLAY,
+      headless: false,
       chromiumSandbox: true,
     },
     contextOptions: {

src/context.ts

@@ -236,7 +236,6 @@ export class Context {
   private async _setupBrowserContext(): Promise<{ browserContext: playwright.BrowserContext, close: () => Promise<void> }> {
     if (this._closeBrowserContextPromise)
       throw new Error('Another browser context is being closed.');
-
     let result: { browserContext: playwright.BrowserContext, close: () => Promise<void> };
 
     if (this._videoRecordingConfig) {