create hide_tabs_toolbar_v2.css

chrome/hide_tabs_toolbar_v2.css

@@ -0,0 +1,51 @@
+/* Source file https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/hide_tabs_toolbar_v2.css made available under Mozilla Public License v. 2.0
+See the above repository for updates as well as full license text. */
+
+/* This requires Firefox 133+ to work */
+
+@media (-moz-bool-pref: "sidebar.verticalTabs"){
+  #sidebar-main{
+    visibility: collapse;
+  }
+}
+@media (-moz-bool-pref: "userchrome.force-window-controls-on-left.enabled"){
+  #nav-bar > .titlebar-buttonbox-container{
+    order: -1 !important;
+    > .titlebar-buttonbox{
+      flex-direction: row-reverse;
+    }
+  }
+}
+@media not (-moz-bool-pref: "sidebar.verticalTabs"){
+  #TabsToolbar{
+    visibility: collapse;
+  }
+  :root[sizemode="fullscreen"] #nav-bar > .titlebar-buttonbox-container{
+    display: flex !important;
+  }
+  :root[tabsintitlebar] #toolbar-menubar:not([autohide="false"]) ~ #nav-bar{
+    > .titlebar-buttonbox-container{
+      display: flex !important;
+    }
+    :root[sizemode="normal"] & {
+      > .titlebar-spacer{
+        display: flex !important;
+      }
+    }
+    :root[sizemode="maximized"] & {
+      > .titlebar-spacer[type="post-tabs"]{
+        display: flex !important;
+      }
+      @media (-moz-bool-pref: "userchrome.force-window-controls-on-left.enabled"),
+        (-moz-gtk-csd-reversed-placement),
+        (-moz-platform: macos){
+        > .titlebar-spacer[type="post-tabs"]{
+          display: none !important;
+        }
+        > .titlebar-spacer[type="pre-tabs"]{
+          display: flex !important;
+        }
+      }
+    }
+  }
+}