--- a/browser/components/nsBrowserGlue.js
+++ b/browser/components/nsBrowserGlue.js
@@ -518,17 +518,17 @@ BrowserGlue.prototype = {
                               .GetStringFromName("brandFullName");
     let message = win.gNavigatorBundle.getFormattedString("slowStartup.message", [productName]);
 
     let buttons = [
       {
         label:     win.gNavigatorBundle.getString("slowStartup.helpButton.label"),
         accessKey: win.gNavigatorBundle.getString("slowStartup.helpButton.accesskey"),
         callback: function () {
-          win.openUILinkIn("https://support.mozilla.org/kb/firefox-takes-long-time-start-up", "tab");
+          win.openUILinkIn("https://support.mozilla.org/kb/reset-firefox-easily-fix-most-problems", "tab");
         }
       },
       {
         label:     win.gNavigatorBundle.getString("slowStartup.disableNotificationButton.label"),
         accessKey: win.gNavigatorBundle.getString("slowStartup.disableNotificationButton.accesskey"),
         callback: function () {
           Services.prefs.setBoolPref("browser.slowStartup.notificationDisabled", true);
         }