1 files changed, 55 insertions, 0 deletions
diff --git a/browser/themes/shared/aboutSessionRestore.css b/browser/themes/shared/aboutSessionRestore.css
new file mode 100644
index 0000000000..4bc69b0122
--- /dev/null
+++ b/browser/themes/shared/aboutSessionRestore.css
@@ -0,0 +1,55 @@
+/* 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/. */
+
+@import url("chrome://browser/skin/tab-list-tree.css");
+
+#tabsToggle {
+  cursor: pointer;
+  /* Override button background-color and color from common.css */
+  background-color: transparent;
+  color: var(--in-content-link-color);
+  -moz-context-properties: fill;
+  fill: currentColor;
+  border: none;
+  padding: 0;
+  margin: 0;
+  padding-inline-end: 45px;
+  position: relative;
+}
+
+#tabsToggle::after {
+  content: "";
+  position: absolute;
+  width: 100%;
+  height: 100%;
+  top: 0;
+  inset-inline-start: 0;
+  background-image: url("chrome://global/skin/icons/arrow-down.svg");
+  background-repeat: no-repeat;
+  background-size: 20px;
+  background-position: right center;
+}
+
+#tabsToggle:dir(rtl)::after {
+  background-position-x: left;
+}
+
+#tabsToggle:not(.tabs-hidden)::after {
+  background-image: url("chrome://global/skin/icons/arrow-up.svg");
+}
+
+#tabsToggle.tabs-hidden > #hideTabs,
+#tabsToggle:not(.tabs-hidden) > #showTabs {
+  display: none;
+}
+
+#tabList {
+  flex: 1;
+  min-height: 12em;
+  margin-top: 1.2em;
+}
+
+.button-container {
+  text-align: end;
+}