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[Home](./index.md) &gt; [puppeteer](./puppeteer.md) &gt; [LaunchOptions](./puppeteer.launchoptions.md) &gt; [extraPrefsFirefox](./puppeteer.launchoptions.extraprefsfirefox.md)

## LaunchOptions.extraPrefsFirefox property

[Additional preferences](https://searchfox.org/mozilla-release/source/modules/libpref/init/all.js) that can be passed when launching with Firefox.

<b>Signature:</b>

```typescript
extraPrefsFirefox?: Record<string, unknown>;
```
