Fixed #647 , Fixed #641

src/other/firefox/Monterey/parts/icons.css

@@ -28,7 +28,7 @@
 /* Popovers subview menu arrow */
 .PanelUI-subView .subviewbutton-nav::after {
 	content: "" !important;
-	background: url("../icons/pan-start-symbolic.svg");
+	background: url("../icons/pan-end-symbolic.svg");
 	background-size: contain;
 	height: 16px;
 	width: 16px;

src/other/firefox/Monterey/parts/tabsbar.css

@@ -18,6 +18,10 @@ tab > stack {
 	background-image: none !important;
 }
 
+.tabbrowser-tab {
+	margin: 2px 0 0 !important;
+}
+
 .tabbrowser-tab:not([visuallyselected="true"], [multiselected]), .tabbrowser-tab:-moz-lwtheme {
 	color: var(--gnome-tabbar-tab-color) !important;
 }
@@ -27,6 +31,8 @@ tab > stack {
 }
 
 .tab-background {
+	margin: 0 !important;
+	background-color: transparent !important;
 	transition: background 200ms !important;
 }
 
@@ -115,11 +121,6 @@ tab > stack {
 	display: flex;
 }
 
-.tab-background {
-	background-color: transparent !important;
-	transition: all 200ms;
-}
-
 #TabsToolbar #alltabs-button {
 	padding: 0 0 !important;
 	visibility: collapse !important;
@@ -127,7 +128,7 @@ tab > stack {
 
 #TabsToolbar .toolbarbutton-1,
 #tabs-newtab-button, #TabsToolbar #new-tab-button {
-	margin: 4px 2px -4px !important;
+	margin: 2px 2px 0 !important;
 	padding: 0 10px !important;
 	max-height: 32px !important;
 	min-height: 32px !important;

src/other/firefox/Monterey/parts/toolbox.css

@@ -40,15 +40,15 @@ findbar:-moz-window-inactive {
 
 #titlebar {
 	min-height: 0 !important
-	max-height: 36px !important;
+	max-height: 48px !important;
 }
 
 #TabsToolbar {
-	margin-top: -44px !important;
+	margin-top: -42px !important;
 	padding: 0 !important;
-	margin-bottom: 8px !important;
+	margin-bottom: 6px !important;
 	background: none !important;
-	max-height: 36px !important;
+	max-height: 48px !important;
 }
 
 #nav-bar {