--- a/browser/base/content/tabbrowser.xml
+++ b/browser/base/content/tabbrowser.xml
@@ -1781,21 +1781,20 @@
             this.tabContainer.appendChild(t);
 
             // If this new tab is owned by another, assert that relationship
             if (aOwner)
               t.owner = aOwner;
 
             let b;
             let usingPreloadedContent = false;
-            let isPrivateWindow = PrivateBrowsingUtils.isWindowPrivate(window);
 
             // If we open a new tab with the newtab URL,
             // check if there is a preloaded browser ready.
-            if (aURI == BROWSER_NEW_TAB_URL && !isPrivateWindow) {
+            if (aURI == BROWSER_NEW_TAB_URL) {
               b = this._getPreloadedBrowser();
               usingPreloadedContent = !!b;
             }
 
             if (!b) {
               // No preloaded browser found, create one.
               b = this._createBrowser({remote, uriIsAboutBlank});
             }