diff --git a/packages/playwright-core/src/server/firefox/ffBrowser.ts b/packages/playwright-core/src/server/firefox/ffBrowser.ts
index f805318c4f..6cf00cc534 100644
--- a/packages/playwright-core/src/server/firefox/ffBrowser.ts
+++ b/packages/playwright-core/src/server/firefox/ffBrowser.ts
@@ -16,7 +16,7 @@
  */
 
 import { kBrowserClosedError } from '../../common/errors';
-import { assert, getAsBooleanFromENV } from '../../utils';
+import { assert } from '../../utils';
 import type { BrowserOptions } from '../browser';
 import { Browser } from '../browser';
 import { assertBrowserContextIsNotOwned, BrowserContext, verifyGeolocation } from '../browserContext';