diff --git a/src/padding/_index.scss b/src/padding/_index.scss
index 2221c46..d38373c 100644
--- a/src/padding/_index.scss
+++ b/src/padding/_index.scss
@@ -81,6 +81,9 @@
 @include Option("userChrome.padding.panel") {
   @import "panel";
 }
+@include Option("userChrome.padding.panel_header") {
+  @import "panel_header";
+}
 
 /*= Popup Panel - Reduce padding =============================================*/
 @include Option("userChrome.padding.popup_panel") {
diff --git a/src/padding/_panel_header.scss b/src/padding/_panel_header.scss
new file mode 100644
index 0000000..12510c0
--- /dev/null
+++ b/src/padding/_panel_header.scss
@@ -0,0 +1,4 @@
+.panel-header{
+  padding: unset !important;
+  padding-top: 4px !important;
+}
diff --git a/src/panel/_full_width_separator.scss b/src/panel/_full_width_separator.scss
new file mode 100644
index 0000000..0af8ac0
--- /dev/null
+++ b/src/panel/_full_width_separator.scss
@@ -0,0 +1,9 @@
+/* Full width separators */
+:root {
+  /* Original
+--panel-separator-margin-vertical: 4px;
+--panel-separator-margin-horizontal: 8px;
+--panel-separator-margin: var(--panel-separator-margin-vertical) var(--panel-separator-margin-horizontal);
+ */
+  --panel-separator-margin-horizontal: 0 !important;
+}
diff --git a/user.js b/user.js
index c910da4..2ecbf65 100644
--- a/user.js
+++ b/user.js
@@ -72,6 +72,7 @@ user_pref("userChrome.tab.bottom_rounded_corner",      true);
 // user_pref("userChrome.padding.menu_compact",                true);
 // user_pref("userChrome.padding.urlView_expanding",           true);
 // user_pref("userChrome.padding.urlView_result",              true);
+// user_pref("userChrome.padding.panel_header",                true);
 
 // user_pref("userChrome.urlView.move_icon_to_left",           true);
 // user_pref("userChrome.urlView.go_button_when_typing",       true);
diff --git a/userChrome.css b/userChrome.css
index a15daf3..07298f7 100644
--- a/userChrome.css
+++ b/userChrome.css
@@ -3482,6 +3482,12 @@
     /* Original: 8px */
   }
 }
+@supports -moz-bool-pref("userChrome.padding.panel_header") {
+  .panel-header {
+    padding: unset !important;
+    padding-top: 4px !important;
+  }
+}
 /*= Popup Panel - Reduce padding =============================================*/
 @supports -moz-bool-pref("userChrome.padding.popup_panel") {
   #protections-popup-main-header-label {