diff --git a/testing/mochitest/browser-test.js b/testing/mochitest/browser-test.js
index ef29179988bb37e7ea441aa051b692e3ccc90f21..6c9641ed27722b5febd83f6e121df24d46b00067 100644
--- a/testing/mochitest/browser-test.js
+++ b/testing/mochitest/browser-test.js
@@ -444,11 +444,11 @@ Tester.prototype = {
       this.currentTest &&
       window.gBrowser &&
       AppConstants.MOZ_APP_NAME != "thunderbird" &&
-      gBrowser.tabs.length > 1
+      gBrowser.tabs.length > 2
     ) {
       let lastURI = "";
       let lastURIcount = 0;
-      while (gBrowser.tabs.length > 1) {
+      while (gBrowser.tabs.length > 2) {
         let lastTab = gBrowser.tabs[gBrowser.tabs.length - 1];
         if (!lastTab.closing) {
           // Report the stale tab as an error only when they're not closing.
@@ -483,12 +483,12 @@ Tester.prototype = {
 
     // Replace the last tab with a fresh one
     if (window.gBrowser && AppConstants.MOZ_APP_NAME != "thunderbird") {
-      gBrowser.addTab("about:blank", {
-        skipAnimation: true,
-        triggeringPrincipal:
-          Services.scriptSecurityManager.getSystemPrincipal(),
-      });
-      gBrowser.removeTab(gBrowser.selectedTab, { skipPermitUnload: true });
+      // gBrowser.addTab("about:blank", {
+      //   skipAnimation: true,
+      //   triggeringPrincipal:
+      //     Services.scriptSecurityManager.getSystemPrincipal(),
+      // });
+      // gBrowser.removeTab(gBrowser.selectedTab, { skipPermitUnload: true });
       gBrowser.stop();
     }
 
