--- sidebar_label: LaunchOptions --- # LaunchOptions interface Generic launch options that can be passed when launching any browser. #### Signature: ```typescript export interface LaunchOptions ``` ## Properties | Property | Modifiers | Type | Description | Default | | ------------------ | --------------------- | ----------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------- | | channel | <code>optional</code> | [ChromeReleaseChannel](./puppeteer.chromereleasechannel.md) | Chrome Release Channel | | | dumpio | <code>optional</code> | boolean | If true, pipes the browser process stdout and stderr to <code>process.stdout</code> and <code>process.stderr</code>. | <code>false</code> | | env | <code>optional</code> | Record<string, string \| undefined> | Specify environment variables that will be visible to the browser. | The contents of <code>process.env</code>. | | executablePath | <code>optional</code> | string | Path to a browser executable to use instead of the bundled Chromium. Note that Puppeteer is only guaranteed to work with the bundled Chromium, so use this setting at your own risk. | | | extraPrefsFirefox | <code>optional</code> | Record<string, unknown> | [Additional preferences](https://searchfox.org/mozilla-release/source/modules/libpref/init/all.js) that can be passed when launching with Firefox. | | | handleSIGHUP | <code>optional</code> | boolean | Close the browser process on <code>SIGHUP</code>. | <code>true</code> | | handleSIGINT | <code>optional</code> | boolean | Close the browser process on <code>Ctrl+C</code>. | <code>true</code> | | handleSIGTERM | <code>optional</code> | boolean | Close the browser process on <code>SIGTERM</code>. | <code>true</code> | | ignoreDefaultArgs | <code>optional</code> | boolean \| string\[\] | If <code>true</code>, do not use <code>puppeteer.defaultArgs()</code> when creating a browser. If an array is provided, these args will be filtered out. Use this with care - you probably want the default arguments Puppeteer uses. | <code>false</code> | | pipe | <code>optional</code> | boolean | Connect to a browser over a pipe instead of a WebSocket. | <code>false</code> | | product | <code>optional</code> | [Product](./puppeteer.product.md) | Which browser to launch. | <code>chrome</code> | | timeout | <code>optional</code> | number | Maximum time in milliseconds to wait for the browser to start. Pass <code>0</code> to disable the timeout. | <code>30_000</code> (30 seconds). | | waitForInitialPage | <code>optional</code> | boolean | Whether to wait for the initial page to be ready. Useful when a user explicitly disables that (e.g. <code>--no-startup-window</code> for Chrome). | <code>true</code> |