primaryToolbar.css

Enable keyboard shortcuts

/* 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-toolbox::after,

.contentTabToolbox::after {

  content: "";

  display: flex;

  height: 1px;

  border-bottom: 1px solid var(--chrome-content-separator-color);

.mail-toolbox > toolbar:not([type="menubar"]) {

  padding: 1px;