[Home](./index.md) > [puppeteer](./puppeteer.md) > [Browser](./puppeteer.browser.md) > [(constructor)](./puppeteer.browser._constructor_.md) ## Browser.(constructor) Constructs a new instance of the `Browser` class Signature: ```typescript constructor(connection: Connection, contextIds: string[], ignoreHTTPSErrors: boolean, defaultViewport?: Viewport, process?: ChildProcess, closeCallback?: BrowserCloseCallback); ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | connection | [Connection](./puppeteer.connection.md) | | | contextIds | string\[\] | | | ignoreHTTPSErrors | boolean | | | defaultViewport | Viewport | | | process | ChildProcess | | | closeCallback | BrowserCloseCallback | |