diff --git a/librewolf.cfg b/librewolf.cfg
index 1dcfabc..26b2945 100644
--- a/librewolf.cfg
+++ b/librewolf.cfg
@@ -659,6 +659,8 @@ lockPref("browser.newtabpage.activity-stream.asrouter.providers.snippets", "");
 lockPref("browser.newtabpage.activity-stream.asrouter.userprefs.cfr.features", false);
 lockPref("browser.newtabpage.activity-stream.asrouter.userprefs.cfr.addons", false);
 
+lockPref("browser.newtabpage.activity-stream.asrouter.providers.whats-new-panel", "{\"id\":\"whats-new-panel\",\"enabled\":false}");
+
 lockPref("browser.messaging-system.whatsNewPanel.enabled", false);
 lockPref("browser.messaging-system.fxatoolbarbadge.enabled", false);
 
@@ -1494,6 +1496,7 @@ lockPref("pref.privacy.disable_button.view_passwords", false);
 
 // Pref :
 lockPref("identity.mobilepromo.android", "");
+pref("identity.sendtabpromo.url", "");
 
 // Pref :
 lockPref("extensions.systemAddon.update.url", "");
@@ -2047,7 +2050,7 @@ lockPref("browser.newtabpage.activity-stream.feeds.snippets", false);
 lockPref("browser.newtabpage.activity-stream.disableSnippets", true);
 lockPref("browser.newtabpage.activity-stream.default.sites", "");
 lockPref("browser.newtabpage.activity-stream.discoverystream.enabled", false);
-lockPref("browser.newtabpage.activity-stream.discoverystream.config", "");
+lockPref("browser.newtabpage.activity-stream.discoverystream.config", "{\"collapsible\":true,\"enabled\":false,\"personalized\":false,\"layout_endpoint\":\"\"}");
 lockPref("browser.newtabpage.activity-stream.discoverystream.endpoints", "");
 lockPref("browser.newtabpage.activity-stream.discoverystream.engagementLabelEnabled", false);
 lockPref("browser.newtabpage.activity-stream.feeds.asrouterfeed", false);