## Acquire and connect to browser session.

`client.browserRendering.devtools.browser.launch(BrowserLaunchParamsparams, RequestOptionsoptions?): void`

**get** `/accounts/{account_id}/browser-rendering/devtools/browser`

Acquires and establishes a WebSocket connection to a browser session. Session guardrails may be supplied in the `cf-brapi-guardrails` header as base64url-encoded JSON of the same `guardrails` object the POST body accepts (for example `{"allowedDomains":["*.example.com"]}`).

### Parameters

- `params: BrowserLaunchParams`

  - `account_id: string`

    Path param: Account ID.

  - `keep_alive?: number`

    Query param: Keep-alive time in ms (only valid when acquiring new session).

  - `lab?: boolean`

    Query param: Use experimental browser.

  - `recording?: boolean`

    Query param

  - `cfBrapiGuardrails?: string`

    Header param: Optional base64url-encoded JSON session guardrails (allowedDomains and allowedDomainSets)

### Example

```typescript
import Cloudflare from 'cloudflare';

const client = new Cloudflare({
  apiToken: process.env['CLOUDFLARE_API_TOKEN'], // This is the default and can be omitted
});

await client.browserRendering.devtools.browser.launch({ account_id: 'account_id' });
```