renamed userChrome.css

.config/mozilla/firefox/chrome/hiddenUserChrome.css

@@ -3,18 +3,22 @@
 }
 
 /* Thanks to @Speravir for making it work again in the latest versions. */
+/*
 #tabbrowser-tabs tab[first-visible-tab="true"][last-visible-tab="true"] {
 	visibility: collapse;
-}
+}*/
 
-#navigator-toolbox[first-visible-tab="true"][last-visible-tab="true"] {
-	visibility: collapse; }
+
+#navigator-toolbox{
+	visibility: collapse !important; }
 
 /* I don't use tabs so I just hide the new tab button. You should be able to use a similar trick as the rule above with
 css siblings selectors if you want to keep it when the tab bar is visible. */
+/*
 #tabbrowser-tabs .tabs-newtab-button { 
 	visibility: collapse !important;
 }
+*/
 
 #tabbrowser-tabs tab {
 	min-height: var(--tab-min-height)