--- a/browser/modules/E10SUtils.jsm
+++ b/browser/modules/E10SUtils.jsm
@@ -14,17 +14,18 @@ this.E10SUtils = {
   shouldBrowserBeRemote: function(aURL) {
     // loadURI in browser.xml treats null as about:blank
     if (!aURL)
       aURL = "about:blank";
 
     if (aURL.startsWith("about:") &&
         aURL.toLowerCase() != "about:home" &&
         aURL.toLowerCase() != "about:blank" &&
-        !aURL.toLowerCase().startsWith("about:neterror")) {
+        !aURL.toLowerCase().startsWith("about:neterror") &&
+        !aURL.toLowerCase().startsWith("about:certerror")) {
       return false;
     }
 
     return true;
   },
 
   shouldLoadURI: function(aDocShell, aURI, aReferrer) {
     // about:blank is the initial document and can load anywhere