puppeteer/website/versioned_docs/version-15.4.2/api/puppeteer.launchoptions.extraprefsfirefox.md
release-please[bot] a43965a4b6
chore(main): release 15.4.2 (#8681)
* chore(main): release 15.4.2

* chore: generate versioned docs

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>
2022-07-21 12:22:40 +00:00

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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>;
}
```