Remove sidebar border

chrome/userChrome.css

@@ -10,6 +10,11 @@
   border-bottom: none !important;
 }
 
+#tabbrowser-tabbox {
+  box-shadow: none !important;
+  outline: none !important;
+}
+
 /* Windows overrides */
 @media (-moz-platform: windows) {
 
@@ -51,13 +56,18 @@
   background-color: var(--cust-accent-darker) !important;
 }
 
-/* URLbar text */
+/* URLbar */
 .urlbarView-url,
 .urlbarView-action,
 .urlbarView-favicon {
   color: var(--cust-accent-text) !important;
 }
 
+#urlbar-input::-moz-selection,
+.urlbarView-row[selected] {
+  background-color: var(--cust-accent-inactive) !important;
+}
+
 /* SETUP */
 /* Color mix */
 @media (prefers-color-scheme: dark) {