diff --git a/modules/desktop/files/etc/firefox-esr/prefs.js b/modules/desktop/files/etc/firefox-esr/prefs.js
index 10ca84e42d6f650576de93deb44168e7a1113363..edf85227b02a7b1935f25a8317aaed9d53f502b3 100644
--- a/modules/desktop/files/etc/firefox-esr/prefs.js
+++ b/modules/desktop/files/etc/firefox-esr/prefs.js
@@ -17,5 +17,7 @@ pref("browser.cache.disk.smart_size.first_run", false);
 pref("browser.cache.disk.smart_size.use_old_max", false);
 pref("browser.download.useDownloadDir", false);
 pref("privacy.donottrackheader.enabled", true);
-pref("browser.startup.homepage_override.mstone.", "ignore");
+pref("startup.homepage_welcome_url, "");
+pref("startup.homepage_welcome_url.additional, "");
+pref("browser.startup.homepage_override.mstone", "ignore");
 pref("browser.startup.homepage", "data:text/plain,browser.startup.homepage=http://ccc-ffm.de/getting-started/");