Add Pale Moon

application/palemoon/base/content/tabbrowser.css

@@ -0,0 +1,68 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+.tabbrowser-tabbox {
+  -moz-binding: url("chrome://browser/content/tabbrowser.xml#tabbrowser-tabbox");
+  /* Make the content area follow the system colors before load */
+  background: Menu;
+  color: MenuText;
+}
+
+.tabbrowser-arrowscrollbox {
+  -moz-binding: url("chrome://browser/content/tabbrowser.xml#tabbrowser-arrowscrollbox");
+}
+
+.tab-close-button {
+  -moz-binding: url("chrome://browser/content/tabbrowser.xml#tabbrowser-close-tab-button");
+  display: none;
+}
+
+.tabbrowser-tabs[closebuttons="activetab"] > * > * > * > .tab-close-button:not([pinned])[selected="true"],
+.tabbrowser-tabs[closebuttons="alltabs"] > * > * > * > .tab-close-button:not([pinned]) {
+  display: -moz-box;
+}
+
+.tab-label[pinned] {
+  width: 0;
+  margin-left: 0 !important;
+  margin-right: 0 !important;
+  padding-left: 0 !important;
+  padding-right: 0 !important;
+}
+
+.tab-stack {
+  vertical-align: top; /* for pinned tabs */
+}
+
+tabpanels {
+  background-color: transparent;
+}
+
+.tab-drop-indicator {
+  position: relative;
+  z-index: 2;
+}
+
+.tab-throbber:not([busy]),
+.tab-throbber[busy] + .tab-icon-image {
+  display: none;
+}
+
+.closing-tabs-spacer {
+  pointer-events: none;
+}
+
+.tabbrowser-tabs:not(:hover) > .tabbrowser-arrowscrollbox > .closing-tabs-spacer {
+  transition: width .15s ease-out;
+}
+
+/**
+ * Optimization for tabs that are restored lazily. We can save a good amount of
+ * memory that to-be-restored tabs would otherwise consume simply by setting
+ * their browsers to 'display: none' as that will prevent them from having to
+ * create a presentation and the like.
+ */
+browser[pending] {
+  display: none;
+}