puppeteer/website/versioned_docs/version-19.8.1/api/puppeteer.launchoptions.extraprefsfirefox.md
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chore: release main (#9932)
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---
sidebar_label: LaunchOptions.extraPrefsFirefox
---
# LaunchOptions.extraPrefsFirefox property
[Additional preferences](https://searchfox.org/mozilla-release/source/modules/libpref/init/all.js) that can be passed when launching with Firefox.
#### Signature:
```typescript
interface LaunchOptions {
extraPrefsFirefox?: Record<string, unknown>;
}
```