1 files changed, 15 insertions, 0 deletions
diff --git a/comm/mail/themes/linux/mail/primaryToolbar.css b/comm/mail/themes/linux/mail/primaryToolbar.css
new file mode 100644
index 0000000000..6e0a76b4d1
--- /dev/null
+++ b/comm/mail/themes/linux/mail/primaryToolbar.css
@@ -0,0 +1,15 @@
+/* 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://messenger/skin/shared/primaryToolbar.css");
+
+/* ::::: Mail Toolbars and Menubars ::::: */
+
+.mail-toolbox::after,
+.contentTabToolbox::after {
+  content: "";
+  display: flex;
+  height: 1px;
+  border-bottom: 1px solid var(--chrome-content-separator-color);
+}