puppeteer/docs/api/puppeteer.launchoptions.md

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---
sidebar_label: LaunchOptions
---
# LaunchOptions interface
Generic launch options that can be passed when launching any browser.
#### Signature:
```typescript
export interface LaunchOptions
```
## Properties
<table><thead><tr><th>
Property
</th><th>
Modifiers
</th><th>
Type
</th><th>
Description
</th><th>
Default
</th></tr></thead>
<tbody><tr><td>
<span id="channel">channel</span>
</td><td>
`optional`
</td><td>
[ChromeReleaseChannel](./puppeteer.chromereleasechannel.md)
</td><td>
Chrome Release Channel
</td><td>
</td></tr>
<tr><td>
<span id="dumpio">dumpio</span>
</td><td>
`optional`
</td><td>
boolean
</td><td>
If true, pipes the browser process stdout and stderr to `process.stdout` and `process.stderr`.
</td><td>
`false`
</td></tr>
<tr><td>
<span id="env">env</span>
</td><td>
`optional`
</td><td>
Record&lt;string, string \| undefined&gt;
</td><td>
Specify environment variables that will be visible to the browser.
</td><td>
The contents of `process.env`.
</td></tr>
<tr><td>
<span id="executablepath">executablePath</span>
</td><td>
`optional`
</td><td>
string
</td><td>
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.
</td><td>
</td></tr>
<tr><td>
<span id="extraprefsfirefox">extraPrefsFirefox</span>
</td><td>
`optional`
</td><td>
Record&lt;string, unknown&gt;
</td><td>
[Additional preferences](https://searchfox.org/mozilla-release/source/modules/libpref/init/all.js) that can be passed when launching with Firefox.
</td><td>
</td></tr>
<tr><td>
<span id="handlesighup">handleSIGHUP</span>
</td><td>
`optional`
</td><td>
boolean
</td><td>
Close the browser process on `SIGHUP`.
</td><td>
`true`
</td></tr>
<tr><td>
<span id="handlesigint">handleSIGINT</span>
</td><td>
`optional`
</td><td>
boolean
</td><td>
Close the browser process on `Ctrl+C`.
</td><td>
`true`
</td></tr>
<tr><td>
<span id="handlesigterm">handleSIGTERM</span>
</td><td>
`optional`
</td><td>
boolean
</td><td>
Close the browser process on `SIGTERM`.
</td><td>
`true`
</td></tr>
<tr><td>
<span id="ignoredefaultargs">ignoreDefaultArgs</span>
</td><td>
`optional`
</td><td>
boolean \| string\[\]
</td><td>
If `true`, do not use `puppeteer.defaultArgs()` 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.
</td><td>
`false`
</td></tr>
<tr><td>
<span id="pipe">pipe</span>
</td><td>
`optional`
</td><td>
boolean
</td><td>
Connect to a browser over a pipe instead of a WebSocket.
</td><td>
`false`
</td></tr>
<tr><td>
<span id="product">product</span>
</td><td>
`optional`
</td><td>
[Product](./puppeteer.product.md)
</td><td>
Which browser to launch.
</td><td>
`chrome`
</td></tr>
<tr><td>
<span id="timeout">timeout</span>
</td><td>
`optional`
</td><td>
number
</td><td>
Maximum time in milliseconds to wait for the browser to start. Pass `0` to disable the timeout.
</td><td>
`30_000` (30 seconds).
</td></tr>
<tr><td>
<span id="waitforinitialpage">waitForInitialPage</span>
</td><td>
`optional`
</td><td>
boolean
</td><td>
Whether to wait for the initial page to be ready. Useful when a user explicitly disables that (e.g. `--no-startup-window` for Chrome).
</td><td>
`true`
</td></tr>
</tbody></table>