--- a/browser/base/content/aboutNetError.xhtml
+++ b/browser/base/content/aboutNetError.xhtml
@@ -103,20 +103,16 @@
       }
 
       function setupAdvancedButton() {
         // Get the hostname and add it to the panel
         var panel = document.getElementById("badCertAdvancedPanel");
         for (var span of panel.querySelectorAll("span.hostname")) {
           span.textContent = document.location.hostname;
         }
-        if (!gIsCertError) {
-          panel.replaceChild(document.getElementById("errorLongDesc"),
-                             document.getElementById("advancedLongDesc"));
-        }
 
         // Register click handler for the weakCryptoAdvancedPanel
         document.getElementById("advancedButton")
                 .addEventListener("click", function togglePanelVisibility() {
           toggleDisplay(panel);
           if (gIsCertError) {
             // Toggling the advanced panel must ensure that the debugging
             // information panel is hidden as well, since it's opened by the
@@ -283,17 +279,17 @@
               "SSL_ERROR_NO_CIPHERS_SUPPORTED"
             ].some((substring) => getDescription().includes(substring));
             // If it looks like an error that is user config based
             if (getErrorCode() == "nssFailure2" && hasPrefStyleError && options && options.changedCertPrefs) {
               showPrefChangeContainer();
             }
           }
           if (getErrorCode() == "sslv3Used") {
-            setupAdvancedButton();
+            document.getElementById("advancedButton").style.display = "none";
           }
         }, true, true);
 
         var event = new CustomEvent("AboutNetErrorLoad", {bubbles: true});
         document.dispatchEvent(event);
 
         if (err == "inadequateSecurityError") {
           // Remove the "Try again" button for HTTP/2 inadequate security as it