diff --git a/suite/browser/browser-prefs.js b/suite/browser/browser-prefs.js
index 6c5f15459203..03e08058b014 100644
--- a/suite/browser/browser-prefs.js
+++ b/suite/browser/browser-prefs.js
@@ -87,6 +87,8 @@ pref("browser.show_about_as_stupid_modal_window", false);
 pref("browser.download.progressDnldDialog.keepAlive", true); // keep the dnload progress dialog up after dnload is complete
 pref("browser.download.progressDnldDialog.enable_launch_reveal_buttons", true);
 pref("browser.download.progressDnlgDialog.dontAskForLaunch", false);
+pref("browser.download.finished_download_sound", false);
+pref("browser.download.finished_download_alert", false);
 pref("browser.download.finished_sound_url", "");
 
 // various default search settings