diff --git a/@types/src/request.d.ts b/@types/src/request.d.ts
index 750b259..024a620 100644
--- a/@types/src/request.d.ts
+++ b/@types/src/request.d.ts
@@ -38,6 +38,7 @@ export default class ScreenshotRequest {
         elapsed_time_s: number;
         zip_url: string | null;
         current_action: string;
+        preview: string;
     }>;
     getGoodImages(): Image[];
     setFinished(): void;
diff --git a/Docker/mozilla/firefox/bifup8k5.docker/prefs.js b/Docker/mozilla/firefox/bifup8k5.docker/prefs.js
index 3f5ee34..47995fd 100644
--- a/Docker/mozilla/firefox/bifup8k5.docker/prefs.js
+++ b/Docker/mozilla/firefox/bifup8k5.docker/prefs.js
@@ -356,3 +356,4 @@ user_pref("toolkit.telemetry.reportingpolicy.firstRun", false);
 user_pref("trailhead.firstrun.didSeeAboutWelcome", true);
 user_pref("browser.disableResetPrompt", true);
 user_pref("devtools.selfxss.count", 100);
+user_pref("intl.accept_languages", "pl,en-us");