import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

browser/themes/osx/preferences/in-content/dialog.css

@@ -0,0 +1,36 @@
+/* - 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/. */
+
+%include ../../../shared/incontentprefs/dialog.inc.css
+
+prefwindow,
+.windowDialog {
+  font: message-box !important;
+}
+
+label:not(.menu-text),
+textbox,
+description,
+.tab-text,
+caption > label {
+  font-size: 1.3em;
+}
+
+/* Create a separate rule to unset these styles on .tree-input instead of
+   using :not(.tree-input) so the selector specifity doesn't change. */
+textbox.tree-input {
+  font-size: unset;
+}
+
+button {
+  font-size: 1em;
+}
+
+caption {
+  font: message-box;
+}
+
+.prefWindow-dlgbuttons {
+  margin: 0;
+}

browser/themes/osx/preferences/in-content/preferences.css

@@ -0,0 +1,53 @@
+/* - 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/. */
+
+%include ../../../shared/incontentprefs/preferences.inc.css
+
+prefpane .groupbox-title {
+  background: none;
+  margin-bottom: 0;
+}
+
+.actionsMenu > .menulist-label-box > .menulist-icon {
+  margin-top: 2px;
+  margin-inline-start: 2px;
+  margin-inline-end: 8px !important;
+}
+
+#downloadFolder > .fileFieldContentBox {
+  padding-inline-start: 3px;
+}
+
+#fxaProfileImage {
+  -moz-user-focus: normal;
+}
+
+textbox + button {
+  margin-inline-start: -4px;
+}
+
+filefield + button {
+  margin-inline-start: -8px;
+}
+
+#popupPolicyRow {
+  /* Override styles from
+     browser/themes/osx/preferences/preferences.css */
+  margin-bottom: 0 !important;
+  padding-bottom: 0 !important;
+  border-bottom: none;
+}
+
+#advancedPrefs {
+  margin-right: 0; /*override margin from normal preferences.css */
+  margin-left: 0;
+}
+
+/**
+ * Dialog
+ */
+
+#dialogTitle {
+  font-size: 1.1em;
+}