Clean up private browsing tab

chrome/userContent.css

-
 /* Hacker News */
 @-moz-document domain("news.ycombinator.com") {
 	textarea, input {
 		display: none !important;
 	}
 }
+
+/* Private browsing new tab */
+@-moz-document url-prefix(about:privatebrowsing) {
+	.logo-and-wordmark,
+	.search-inner-wrapper {
+		display: none !important;
+	}
+
+	.info-border {
+		display: none;
+	}
+}

user.js

 user_pref("browser.shopping.experience2023.enabled", false);
 user_pref("browser.urlbar.pocket.featureGate", false);
 user_pref("browser.urlbar.trending.featureGate", false);
+user_pref("browser.privatebrowsing.vpnpromourl", ""); // hide private browsing promo
 
 /* Telemetry */
 user_pref("datareporting.policy.dataSubmissionEnabled", false);