diff --git a/internal/support/Firefox/profile/prefs.js b/internal/support/Firefox/profile/prefs.js
index a1502ee7d..369f3db9b 100644
--- a/internal/support/Firefox/profile/prefs.js
+++ b/internal/support/Firefox/profile/prefs.js
@@ -55,7 +55,7 @@ user_pref("dom.max_chrome_script_run_time", 0);
 user_pref("dom.max_script_run_time", 0);
 user_pref("dom.webnotifications.enabled", false);
 user_pref("dom.performance.time_to_dom_content_flushed.enabled", true);
-user_pref("dom.performance.time_to_interactive.enabled", true);
+user_pref("dom.performance.time_to_first_interactive.enabled", true);
 user_pref("dom.performance.time_to_non_blank_paint.enabled", true);
 user_pref("extensions.checkCompatibility", false);
 user_pref("extensions.pocket.enabled", false);